CN112566227B - Power supply circuit, terminal, power supply method, device and storage medium - Google Patents

Abstract

The application relates to a power supply circuit, a terminal, a power supply method, a device, and a storage medium. In the power supply circuit, the output terminals of the power supply are respectively connected to the input terminals of the voltage converter and the power switch, and the output terminals of the voltage converter are connected to the power switch. The input terminal of the power amplifier is connected to the power switch, and the radio frequency transceiver is connected to the power switch; the power switch is used to select the path between the power supply and the power amplifier according to the control signal output by the radio frequency transceiver, or to select the power supply, The path between the voltage converter and the power amplifier. In this power supply circuit, the power amplifier can be provided with an adaptive voltage through the set power switch, ensuring that the power amplifier always works in a place close to the saturation area, thereby improving the use efficiency of the power amplifier and reducing the overall power of the terminal. consumption.

Description

Power supply circuit, terminal, power supply method, device and storage medium

technical field

The present application relates to the field of electronic technology, in particular to a power supply circuit, a terminal, a power supply method, a device and a storage medium.

Background technique

At present, most domestic and foreign operators require that the global system for mobile communications (GSM) must be supported among the communicable terminals. Therefore, in the design process of communicable terminals (such as mobile phones), all must be Design the power supply circuit supporting the GSM part.

However, the power supply circuit of the GSM part designed in the related art causes the problem of high power consumption when the terminal is in use.

Contents of the invention

Based on this, it is necessary to provide a power supply circuit, a terminal, a power supply method, a device, and a storage medium capable of reducing power consumption of a terminal to address the above technical problems.

In the first aspect, the embodiment of the present application provides a power supply circuit, the power supply circuit includes: a power supply, a voltage converter, a power switch, a power amplifier and a radio frequency transceiver; the output end of the power supply is connected to the input end of the voltage converter and the power switch respectively Connecting, the output terminal of the voltage converter is connected with the power switch, the input terminal of the power amplifier is connected with the power switch, and the radio frequency transceiver is connected with the power switch;

The power switch is used to select the path between the power supply and the power amplifier according to the control signal output by the radio frequency transceiver, or select the path between the power supply, the voltage converter and the power amplifier.

In one of the embodiments, the above-mentioned radio frequency transceiver is used to obtain the power supply voltage of the power amplifier, and generate a control signal according to the power supply voltage and a preset voltage threshold.

In one of the embodiments, the radio frequency transceiver is configured to transmit the first control signal to the power switch when the power supply voltage of the power amplifier is greater than a preset voltage threshold;

The above-mentioned power switch is used for selectively conducting the path between the power supply and the power amplifier according to the first control signal.

In one of the embodiments, the above radio frequency transceiver is used to transmit the second control signal to the power switch when the power supply voltage of the power amplifier is less than or equal to the preset voltage threshold;

The above-mentioned power switch is used for selectively conducting the paths among the power supply, the voltage converter and the power amplifier according to the second control signal.

In one of the embodiments, the above-mentioned radio frequency transceiver is used to obtain the current transmit signal power value of the terminal, and according to the corresponding relationship between the preset power range and the power supply voltage, the corresponding power supply of the power range to which the current transmit signal power value belongs Voltage, determined as the supply voltage of the power amplifier.

In one of the embodiments, the power switch includes a first power switch and a second power switch, the input of the first power switch is connected to the power supply, the output of the first power switch is connected to the power amplifier; the input of the second power switch The terminal is connected with the voltage converter, and the output terminal of the second power switch is connected with the power amplifier;

When the first power switch selects to turn on the path between the power supply and the power amplifier, the second power switch selects to turn off the path between the power supply, the voltage converter and the power amplifier; or, the second power switch selects to turn on the power supply, voltage conversion When the path between the power supply and the power amplifier is selected, the first power switch selects to turn off the path between the power supply and the power amplifier.

In one embodiment, the power switch includes a ground terminal, the ground terminal of the first power switch is connected to a first resistor, and the ground terminal of the second power switch is connected to a second resistor.

In a second aspect, embodiments of the present application provide a terminal, and the terminal includes the power supply circuit provided in any one embodiment of the first aspect above.

In the third aspect, the embodiment of the present application provides a power supply method, which is applied to the power supply circuit provided in any one embodiment of the first aspect above; the power supply method includes:

Get the control signal;

According to the control signal, the conduction state of the power switch is controlled to select the path between the power supply and the power amplifier, or to select the path between the power supply, the voltage converter and the power amplifier.

In one of the embodiments, the acquisition of the control signal includes:

Obtain the power supply voltage of the power amplifier;

A control signal is generated based on a supply voltage and a preset voltage threshold.

In one of the embodiments, the generation of the control signal according to the power supply voltage and the preset voltage threshold includes:

If the power supply voltage of the power amplifier is greater than the preset voltage threshold, a first control signal is generated; the first control signal is used to control the power switch to select and conduct the path between the power supply and the power amplifier.

In one of the embodiments, the generation of the control signal according to the power supply voltage and the preset voltage threshold includes:

If the power supply voltage of the power amplifier is less than or equal to the preset voltage threshold, a second control signal is generated; the second control signal is used to control the power switch to select and conduct the path between the voltage converter and the power amplifier.

In one of the embodiments, the above-mentioned acquisition of the power supply voltage of the power amplifier includes:

Obtain the current transmit signal power value of the terminal;

According to the corresponding relationship between the preset power range and the power supply voltage, the power supply voltage corresponding to the power range to which the current transmit signal power value belongs is determined as the power supply voltage of the power amplifier.

In one of the embodiments, the above-mentioned power switch includes a first power switch and a second power switch; according to the control signal, the conduction state of the power switch is controlled to selectively conduct the path between the power supply and the power amplifier, or to select the conduction state between the power supply and the power amplifier. The path between the power supply, the voltage converter and the power amplifier, including:

According to the above control signal, when the path between the power supply and the power amplifier is selected to be turned on through the first power switch, the path between the power supply, the voltage converter and the power amplifier is selected to be turned off through the second power switch; or,

According to the above control signal, when the path between the power supply, the voltage converter and the power amplifier is selected to be turned on through the second power switch, the path between the power supply and the power amplifier is selected to be turned off through the first power switch.

In a fourth aspect, the embodiments of the present application provide a computer device, including a memory and a processor, the memory stores a computer program, and when the processor executes the computer program, the steps of any one of the methods provided in the embodiments of the third aspect above are implemented.

In a fifth aspect, the embodiments of the present application provide a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of any one of the methods provided in the embodiments of the third aspect above are implemented.

A power supply circuit, a terminal, a power supply method, a device, and a storage medium provided in the embodiments of the present application, the output terminals of the power supply in the power supply circuit are respectively connected to the input terminals of the voltage converter and the power switch, and the output terminals of the voltage converter are connected to the power supply Switch connection, the input terminal of the power amplifier is connected to the power switch, and the radio frequency transceiver is connected to the power switch; the power switch is used to select the path between the power supply and the power amplifier according to the control signal output by the radio frequency transceiver, or to select the path between the power supply and the power amplifier. The path between the power supply, the voltage converter and the power amplifier. In the power supply circuit, the set power switch switches the path for supplying the power amplifier with the power supply voltage according to the control signal output by the radio frequency transceiver, which is equivalent to setting the power switch so that when the power amplifier is supplied with the power The actual voltage demand of the amplifier provides a suitable voltage. For example, when a constant voltage needs to be provided to the power amplifier, the path between the power supply and the power amplifier is selected through the power switch, and when a variable voltage needs to be provided to the power amplifier , through the power switch to select the path between the power supply, the voltage converter and the power amplifier; in this way, the power amplifier can be provided with an adapted voltage through the set power switch, ensuring that the power amplifier always works in a place close to the saturation region , thereby improving the use efficiency of the power amplifier, thereby reducing the overall power consumption of the terminal.

Description of drawings

Figure 1a is a schematic diagram of a power supply circuit provided by an embodiment;

Figure 1b is a schematic diagram of another power supply circuit provided by an embodiment;

Fig. 2 is a schematic structural diagram of a power supply circuit provided by an embodiment;

FIG. 3 is a schematic diagram of another power supply circuit provided by an embodiment;

Fig. 4 is a schematic diagram of a power switch connection resistor structure provided by an embodiment;

FIG. 5 is a schematic structural diagram of another power supply circuit provided by an embodiment;

FIG. 6 is a schematic structural diagram of another power supply circuit provided by an embodiment;

FIG. 7 is a schematic structural diagram of another power supply circuit provided by an embodiment;

FIG. 8 is a schematic flowchart of a power supply method provided by an embodiment;

FIG. 9 is a schematic flowchart of another power supply method provided by an embodiment;

FIG. 10 is a schematic flowchart of a power supply method provided by another embodiment;

Fig. 11 is a schematic flowchart of a power supply method provided by another embodiment;

Figure 12 is a diagram of the internal structure of a computer device in one embodiment.

Detailed ways

In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

As shown in Figure 1a, in order to design the power supply circuit of the Global System for Mobile Communications (GSM), the power supply scheme that does not support the average power tracking technology (AveragePower Tracing, APT) mode, the power supply scheme of GSM The power supply of the power amplifier (Power Amplifier, PA) is directly output from the battery or the power management chip (Power Management Integrated Circuits, PMIC) to the VCC port of the PA, that is, the power supply voltage of the GSM PA is constant at different power levels, and The specific value of this value is set according to the actual situation, for example, 4V.

As shown in Figure 1b, in order to support the power supply scheme of APT mode when designing the power supply circuit of GSM, in this power supply scheme, an additional DC-DC converter (Direct Current Direct Current Converter, DCDC) chip is added to make the GSM PA The power supply voltage adapts to the change of PA output power. That is, the power supply voltage of GSM PA is not a constant value, but follows the output power of the PA. When the power changes, the power supply voltage of the PA will also change accordingly.

In the related art, when using the above two power supply schemes to design the power supply circuit, one of them is usually selected in combination with the specific positioning of the terminal to design the power supply circuit; for example, a mobile phone that supports APT or Envelope Tracking (ET) is required , the power supply circuit will be designed with a power supply scheme that supports the APT mode; for mobile phones that do not need to support APT, the power supply circuit will be designed with a power supply scheme that does not support the APT mode.

For the GSM power supply scheme that does not support the APT mode, since the power supply voltage of the PA under different transmission powers is a fixed value (battery voltage VBAT), it will not change with the power of the PA, so it will cause the power supply of the PA under the small and medium power level The voltage VBAT is relatively high, so the efficiency of the PA is relatively low, resulting in a large power consumption of the terminal; in order to overcome the problem of high power consumption of the PA under low and medium power, a GSM power supply solution supporting APT mode has appeared, that is, through Adding a DCDC chip can provide different power supply voltages (VAPT) for the PA according to different output powers of the PA. The specific performance is that the power supply voltage VAPT of the PA is also small under low power, so that the PA will also work in the near-saturation region under low power. The efficiency of the PA is improved, so that the power consumption of the terminal is relatively small.

However, the disadvantage of the GSM power supply scheme that supports APT mode is that under high power, the power supply voltage VAPT of PA is basically close to the constant battery voltage VBAT, and even higher than VBAT. Therefore, compared with the power supply scheme that does not support APT mode, The power supply scheme that supports APT mode does not have the advantage of supply voltage under high power, so there will be no advantage in PA efficiency; and, under high power, the efficiency of the APT DCDC chip itself is not 100% (actually about 85% to 95%), the APT DCDC chip itself will cause power consumption, which will cause this solution to consume more power than the first solution under high power. In addition, the increase of current at high power will also bring about possible noise problems.

Based on this, the embodiments of the present application provide a power supply circuit, a terminal, a power supply method, a device, and a storage medium, which can reduce the power consumption of the terminal and reduce the power consumption pressure of the terminal. The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems and realizes the above-mentioned technical effects will be described in detail below through embodiments and in conjunction with the accompanying drawings. The following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them.

The power supply circuit provided in the embodiment of the present application will be specifically described below.

As shown in Figure 2, in one embodiment, a kind of power supply circuit is provided, and this power supply circuit comprises: power supply 01, voltage converter 02, power switch 03, power amplifier 04 and radio frequency transceiver 05; Connect with the input end of voltage converter 02 and power switch 03, the output end of voltage converter 02 is connected with power switch 03, the input end of power amplifier 04 is connected with power switch 03, radio frequency transceiver 05 is connected with power switch 03; Wherein , the power switch 03 is used to select the path between the power supply 01 and the power amplifier 04 according to the control signal output by the radio frequency transceiver 05, or select the path between the power supply 01, the voltage converter 02 and the power amplifier 04.

In Figure 2, the radio frequency transceiver is a circuit for transmitting and receiving radio frequency signals. Amplifying stage) After obtaining enough radio frequency power, feed it to the antenna to radiate out, and to ensure the normal operation of the power amplifier, it is necessary to provide a power supply voltage to the power amplifier.

In the power supply circuit shown in Figure 2, the power supply voltage of the power amplifier includes two paths; one of them is path A between the power supply and the power amplifier, in this path A, the voltage output by the power supply can be directly output to the power amplifier, as The power amplifier provides a power supply voltage to ensure that the power amplifier can work normally. Wherein, the power supply may be a battery, a power management chip (Power Management Integrated Circuits, PMIC), etc. that can provide a constant voltage, that is, a constant voltage is provided to the power amplifier in the channel A. Wherein, the type of the power management chip is a management chip that can provide constant voltage. Wherein, the voltage converter may be a DC-DC converter (Direct Current Direct Current Converter, DCDC) chip.

The other is the path B from the power supply to the voltage converter and then to the power amplifier (also called the path between the voltage converter and the power amplifier). In this path B, the voltage output by the power supply passes through the voltage converter and then is output from the voltage converter. to the power amplifier. Optionally, voltage conversion can be realized after the voltage output by the battery or the battery management chip passes through the DCDC chip. For example, the voltage conversion includes step-up and step-down. In channel B, the voltage output to the power amplifier is through a voltage converter, that is, the voltage provided to the power amplifier in channel B is a variable voltage, so that the output power of the power amplifier can be provided to the power amplifier. The supply voltage value will also be different.

The difference between path A and path B is: path A directly provides a constant voltage to the power amplifier, and path B provides a variable voltage to the power amplifier. Therefore, from the perspective of improving the efficiency of the power amplifier, try to make the voltage provided for the power amplifier It can ensure that the power amplifier works in a state close to the saturation region. For example, when the transmission power of the radio frequency signal is high, the power supply voltage required by the power amplifier is also relatively large. In this case, providing a constant voltage to the power amplifier can ensure It works in a state close to the saturation region; and when the transmission power of the radio frequency signal is small and medium power, the power supply voltage required by the power amplifier is also small. If in this case, a constant voltage is still provided for the power amplifier, it will cause power The use efficiency of the amplifier is greatly reduced, resulting in a large power consumption. Therefore, when the transmission power of the radio frequency signal is small and medium power, a variable voltage is provided to the power amplifier, so that the power amplifier can be provided with the required voltage value. Therefore, it is ensured that the power amplifier also works in a place close to the saturation region under the condition of small and medium power. Among them, the size of the signal transmission power may depend on the distance between the terminal and the base station, or the high signal transmission power caused by the terminal running certain services. For example, the transmission power greater than 24dBm can be considered as high power. The definition may be determined according to the actual situation, which is not limited in this embodiment of the present application.

Therefore, in practical applications, when providing a power supply voltage for the power amplifier, one of the above-mentioned path A and path B can be selected to supply power to the power amplifier in combination with the actual needs of the power amplifier. Optionally, the power switch can be used to select one of the above-mentioned path A and path B, that is, by controlling the conduction state of the power switch, the path between the power supply and the power amplifier is selected, or the power supply is selected to be turned on. , The path between the voltage converter and the power amplifier.

Wherein, the radio frequency transceiver is connected to the power switch, and is used to output a control logic signal to the power switch to realize the opening or closing of the power switch. In this way, the power switch can control the conduction of path A according to the control signal output by the radio frequency transceiver, or, The control path B is turned on. For example, the radio frequency transceiver can generate a control signal that can control the power switch according to the type of the power supply voltage currently required to be provided to the power amplifier, and transmit the control signal to the power switch to control the conduction state of the power switch. It is understandable that only one of path A and path B can be controlled to conduct when the power switch is turned on, so the control signal sent by the radio frequency transceiver also needs to distinguish the conduction path A or the conduction path B, so that it can be accurately The ground pair switches between path A and path B. For example, when it is necessary to provide a constant voltage to the power amplifier, outputting a high-level signal to the power switch is used to control the conduction of the power switch to control path A; The level signal is used to control the power switch to control the conduction of the channel B. Wherein, the power switch may be configured as a single-pole double-throw switch, or configured as two independent power switches, etc., which is not limited in this embodiment of the present application.

In the power supply circuit provided in this embodiment, the output end of the power supply in the power supply circuit is respectively connected to the input end of the voltage converter and the power switch, the output end of the voltage converter is connected to the power switch, and the input end of the power amplifier is connected to the power switch , the radio frequency transceiver is connected to the power switch; the power switch is used to select the path between the power supply and the power amplifier according to the control signal output by the radio frequency transceiver, or to select the path between the power supply, the voltage converter and the power amplifier path. In the power supply circuit, the set power switch switches the path for supplying the power amplifier with the power supply voltage according to the control signal output by the radio frequency transceiver, which is equivalent to setting the power switch so that when the power amplifier is supplied with the power The actual voltage demand of the amplifier provides a suitable voltage. For example, when a constant voltage needs to be provided to the power amplifier, the path between the power supply and the power amplifier is selected through the power switch, and when a variable voltage needs to be provided to the power amplifier , through the power switch to select the path between the power supply, the voltage converter and the power amplifier; in this way, the power amplifier can be provided with an adapted voltage through the set power switch, ensuring that the power amplifier always works in a place close to the saturation region , thereby improving the use efficiency of the power amplifier, thereby reducing the overall power consumption of the terminal.

Compared with the power supply circuit designed with the power supply scheme supporting APT mode or the GSM power supply scheme that does not support APT mode in the related technology mentioned above, in the embodiment of the present application, by adding a power switch, it can overcome the problem that does not support APT power supply. The problem of high power consumption of the power amplifier under low and medium power of the scheme also overcomes the problem of extra power consumption brought by the APT DCDC chip supporting the APT power supply scheme under high power, and reduces the possibility of noise problems. The overall circuit structure Simple, the feasibility and effect are very significant in actual use, and the added power switch will not cause additional power consumption, which can achieve a very high effect of reducing power consumption.

In the above embodiment, when the power switch controls path A to be turned on or path B to be turned on, it is realized based on the control signal transmitted by the radio frequency transceiver to the power switch. Therefore, an embodiment is provided to generate a control signal for the radio frequency transceiver The process is explained.

Then, in one embodiment, the radio frequency transceiver 05 is configured to obtain the power supply voltage of the power amplifier 04, and generate a control signal according to the power supply voltage and a preset voltage threshold. Optionally, the radio frequency transceiver 05 is used to transmit the first control signal to the power switch 03 when the power supply voltage of the power amplifier 04 is greater than the preset voltage threshold; the power switch 03 is used to select and turn on the power supply according to the first control signal 01 and the path between the power amplifier 04. Optionally, the radio frequency transceiver 05 is used to transmit the second control signal to the power switch 03 when the power supply voltage of the power amplifier 04 is less than or equal to the preset voltage threshold; the power switch 03 is used to select the power supply according to the second control signal Connect the path between the voltage converter 02 and the power amplifier 04.

Combined with the difference between the previous path A and path B, it can be seen that path A and path B are aimed at the situation of different power supply voltages of the power amplifier. Therefore, when conducting path A or conducting path B, the radio frequency transceiver can determine whether conducting path A or conducting path B according to the power supply voltage required by the power amplifier, that is, transmit the control signal of conducting path A to the power switch , or turn on the control signal of path B.

Specifically, a voltage threshold is preset, and the voltage threshold may be determined according to actual conditions, for example, set to be equal to the battery voltage or other values, which is not limited in this embodiment of the present application. The radio frequency transceiver can generate a control signal for turning on path A or a control signal for turning on path B according to the magnitude relationship between the power supply voltage of the power amplifier and the preset voltage threshold.

Channel A provides a constant voltage, which provides a higher voltage value to the power amplifier, then the radio frequency transceiver can generate the first control signal when the power supply voltage of the power amplifier is greater than the preset voltage threshold, and transmit the first control signal to the power switch A control signal, after the power switch receives the first control signal, the path A is selected to be turned on, that is, the path between the power supply and the power amplifier is selected to be turned on.

Channel B provides a variable voltage, and the voltage value it provides to the power amplifier can match the appropriate voltage value according to the actual output power of the power amplifier, then the RF transceiver can , generate a second control signal, and transmit the second control signal to the power switch, after the power switch receives the second control signal, it selects conduction path B, that is, selects the conduction path between the voltage converter and the power amplifier .

In this embodiment, the radio frequency transceiver generates the control signal for controlling the conduction of the path A or the conduction of the control path B through the obtained power supply voltage of the power amplifier and the preset voltage threshold. In this way, for different The power supply path generates different control signals, which can switch between path A and path B more accurately, and different power supply paths cover all voltage conditions of the power amplifier application, so that no matter what the situation is, the power amplifier can be guaranteed. work efficiency, thereby reducing the power consumption of the terminal as a whole.

In one embodiment, an implementable manner for the radio frequency transceiver 05 to determine the power supply voltage of the power amplifier includes: the radio frequency transceiver 05 is used to obtain the current transmit signal power value of the terminal, and according to the preset power range and the power supply voltage Corresponding relationship, the power supply voltage corresponding to the power range to which the current transmission signal power value belongs is determined as the power supply voltage of the power amplifier 04.

The corresponding relationship between the power range and the supply voltage is stored in the terminal in advance. For example, the power range is a1-a2, and the corresponding supply voltage is b1; the power range is a3-a4, and the corresponding supply voltage is b2; ... the power range is an-an+1 corresponds to a power supply voltage of bn. Among them, the corresponding relationship can be set according to the actual data measurement value to ensure the accuracy of the corresponding relationship. Furthermore, the corresponding relationship can be corrected in combination with empirical values to ensure the adaptability between the corresponding relationship and the actual hardware. Further Improve the accuracy of correspondence.

The current transmit signal power value of the terminal is sent by the base station to the terminal CPU, and the CPU transmits the current transmit signal power value to the radio frequency transceiver after receiving the current transmit signal power value. According to the above-mentioned correspondence between the preset power range and the power supply voltage, the radio frequency transceiver first inquires the power range to which the current transmit signal power value belongs, and then determines the power supply voltage corresponding to the power range as the power supply voltage currently required by the power amplifier .

In this embodiment, the radio frequency transceiver determines the power supply voltage of the power amplifier according to the current transmission signal power of the terminal and the corresponding relationship between the preset power range and the power supply voltage, and determines the power supply voltage based on the current transmission signal power of the terminal. The power supply voltage of the amplifier greatly guarantees the accuracy of the power supply voltage of the power amplifier determined by the radio frequency transceiver.

Considering that only one of path A and path B can be turned on at a time, in one embodiment, a power switch can be set for path A and path B respectively, as shown in Figure 3, which is based on the above-mentioned Figure 2 On, the power switch 03 is set as the first power switch 031 and the second power switch 032, the input end of the first power switch 031 is connected with the power supply 01, and the output end is connected with the power amplifier 04; the first power switch 031 is used for Turn on the circuit path between the power supply 01 and the power amplifier 04; the input end of the second power switch 032 is connected to the voltage converter 02, and the output end is connected to the power amplifier 04; the second power switch 032 is used for conducting voltage conversion The circuit path between the device 02 and the power amplifier 04.

When the path A needs to be turned on, the radio frequency transceiver sends a control signal to the first power switch to turn on the first power switch. After the first power switch is turned on, the circuit between the power supply and the power amplifier is also turned on (the path A is turned on. At the same time, the radio frequency transceiver sends a control signal to the second power switch to turn off the second power switch. When the second power switch is turned off, the circuit between the power supply, the voltage converter and the power amplifier is also turned off (path B is turned off); that is, when there are the first power switch and the second power switch, when the first power switch is turned on, the second power switch must be turned off, so that only path A can be guaranteed to be turned on.

When it is necessary to turn on the path B, the radio frequency transceiver sends a control signal to the first power switch to turn off the first power switch, and after the first power switch is turned off, the circuit between the power supply and the power amplifier is also turned off (path A turn off), at the same time, the radio frequency transceiver sends a control signal that makes the second power switch conduction to the second power switch, and when the second power switch is turned on, the circuit between the power supply, the voltage converter and the power amplifier is also turned on ( Path B is turned on); that is, when there are the first power switch and the second power switch, when the first power switch is turned off, the second power switch is turned on, ensuring that only path B is turned on.

In this embodiment, a power switch is provided for path A and path B respectively. When switching path A and path B, one of the first power switch or the second power switch is controlled to be turned on, and the other is turned off, so that the two power switches Only one of them is turned on at the same time, and an adapted power supply voltage is provided to the power amplifier at different times, thereby ensuring the working efficiency of the power amplifier and reducing power consumption.

In addition, considering that in the power supply circuit provided by this application, the power supply belongs to the radio frequency power supply, and the frequency of the radio frequency power supply is relatively high, especially the embodiment of the application is aimed at APT, so when adding an additional power switch to the radio frequency power supply, it is necessary to consider its application process factors in, for example, the parasitic capacitance value when the power switch is turned off.

Optionally, the power switch includes a ground terminal, the ground terminal of the first power switch is connected to a first resistor, and the ground terminal of the second power switch is connected to a second resistor.

For example, when path B in FIG. 3 is switched with path A, it is controlled by the first power switch and the second power switch, so it can also be understood that the second power switch is a device connected in series to path B. Generally, for the power switch connected in series on the output terminal of the RF voltage converter (that is, the DCDC chip), the RF DCDC chip has relatively high requirements on the total capacitance of the parallel capacitance (including the parasitic capacitance of the parallel device) generated on the entire path. , but due to the parasitic capacitance of the power switch itself, it is equivalent to connecting an additional capacitor in parallel to the DCDC chip, and when the capacitance of the parasitic capacitor is relatively large, it will affect the output power waveform of the DCDC. Therefore, when setting the second power switch in the path B of FIG. 3 above, it is necessary to eliminate the parasitic capacitance generated when the second power switch in the path B is turned off. It is not desirable to generate additional parasitic capacitance in the path B, so as to avoid the The parallel capacitance on the increase.

Based on this, in the embodiment of the present application, a resistor can be integrated inside the power switch to reduce or even eliminate the parasitic capacitance generated when the power switch is turned off. As shown in Figure 4, it is a schematic structural diagram of the power switch including a built-in resistor R in the embodiment of the present application. For example, one end of the second resistor is connected to the input terminal Vin of the second power switch, and the other end of the second resistor is grounded. Optionally, the resistance can be about 1KΩ. In this way, when the second power switch is turned on, The input Vin of the second power switch is connected to the output terminal Vout of the second power switch, and the second power switch is turned on; when the second power switch is turned off, it is not simply turned off, but is connected in series through the second internal resistor to The ground terminal makes the second power switch appear as a high-impedance state to the outside, so that the capacitance of the parasitic capacitance generated by the power switch can be greatly reduced or even eliminated. Alternatively, when the first power switch is turned off and the second power switch is turned on, the first power switch is connected in series to the ground through the first internal resistor, and the first power switch is in a high-impedance state externally, thereby reducing or even eliminating the first power supply The capacitance value of the parasitic capacitance generated by the switch.

In the embodiment of the present application, the ground terminal of the power switch is provided with a resistor. When the power switch needs to be disconnected, it is not simply disconnected, but is connected to the ground through an internal resistor in series, so that the power switch appears as a high-impedance state externally, so that It can greatly reduce or even eliminate the capacitance of the parasitic capacitance generated by the power switch. High performance of the voltage converter when supplying voltage to the power amplifier is guaranteed.

Optionally, as shown in FIG. 5 , the radio frequency transceiver may send control signals to the first power switch 031 and the second power switch 032 through general purpose input/output ports (General Purpose I/O Ports, GPIO).

As an example, in one case, the radio frequency transceiver transmits a turn-on control signal to the first power switch through GPIO1, for example, outputs a low-level signal, and transmits a turn-off control signal to the second power switch through GPIO2, for example, outputs a high-level signal. In this case, the voltage flows through the power supply directly through the first power switch to the power amplifier. In another case, the radio frequency transceiver transmits an off control signal to the first power switch through GPIO1, for example, outputs a high level signal, and transmits an on control signal to the second power switch through GPIO2, for example, outputs a low level signal, In this case, the voltage is passed through the power supply, through the voltage converter, to the second power switch, and finally to the power amplifier.

In this embodiment, the on-off states of the first power switch and the second power switch are respectively controlled by outputting control signals through the GPIO port, and the implementation method is simple and efficient.

Optionally, a power supply circuit is also provided, and the power supply circuit includes a duplexer 06. Optionally, as shown in FIG. 6, the receiving end of the duplexer 06 is connected to the output end of the power amplifier 04. The transmitting end of the duplexer 06 is connected to the input end of the radio frequency transceiver, and the antenna port of the duplexer is connected to the antenna 07. The radio frequency signal transmitted by the radio frequency transceiver can be isolated from the radio frequency signal received by the duplexer 06 .

For example, the signal transmitting end of the radio frequency transceiver transmits the signal to the power amplifier for amplification, then transmits the amplified signal to the duplexer, and transmits it to the antenna from the antenna port of the duplexer for transmission; or, the signal received by the antenna enters After the duplexer, it is transmitted from the transmitting end of the duplexer to the input end of the radio frequency transceiver, so as to ensure that the power supply circuit can work normally at the same time for receiving and transmitting radio frequency signals.

As shown in Figure 7, a power supply circuit is provided. In the power supply circuit, the power switch includes a first power switch (power switch 1) and a second power switch (power switch 2), and the radio frequency transceiver controls the corresponding power supply through GPIO1 and GPIO2. The on-off state of the switch, the power supply is a battery or PMIC (power management chip), and in Figure 7, the voltage converter is represented as APTDCDC, the radio frequency transceiver is represented as RFIC, and the power amplifier is represented as PA.

Then in this power supply circuit, when the terminal needs to transmit a high-power level signal (the base station sends to the terminal CPU, and the CPU instructs the RFIC), the power supply voltage of the PA needs to be increased accordingly. When the power supply voltage VPA required by the PA increases to equal to When VBAT (preset voltage threshold), RFIC controls power switch 1 to turn on through GPIO1 and GPIO2, and power switch 2 to turn off. At this time, the power supply of PA flows through power switch 1 to PA through battery or PMIC. Compared with the existing technology, this situation is switched to the direct power supply of the battery or PMIC, the APT DCDC chip does not work, there is no current loss, and because the power switch itself basically has no current loss, the current loss of the APT DCDC chip can be avoided, reducing the Power dissipation also reduces noise.

When the terminal needs to transmit power with a lower power level, the power supply voltage VPA required by the PA is less than VBAT, the RFIC controls the power switch 2 to turn on through GPIO1 and GPIO2, and the power switch 1 is turned off. At this time, the power supply of the PA flows through the battery or PMIC APT DCDC, then to power switch 2, and finally to GSM PA. In this way, the power supply voltage of GSM PA can be controlled by passing through APT DCDC, and the power supply can be switched to APT DCDC to realize the APT power supply function of GSM, and the power supply voltage of PA under low power can be reduced, thereby reducing the power consumption of PA.

In the embodiment of the present application, by adding a power switch, the problem of large power consumption of the power amplifier that does not support the APT power supply scheme at low and medium power is overcome, and the additional power consumption brought by the APT DCDC chip that supports the APT power supply scheme at high power is overcome. The problem of power consumption and the possibility of noise problems are reduced. The overall circuit structure is simple, and the feasibility and effect are very significant in actual use, and the added power switch will not cause additional power consumption, which can achieve a very high reduction effect on power consumption.

It should be noted that although the embodiment of the present application is only aimed at the PA power supply circuit switching scheme in the GSM standard, in practical applications, other standards, for example, 3G (such as WCDMA), 4G (such as LTE), and 5G NR communication in mobile phones Because also there is similar power supply structure in technology, namely also there is above-mentioned technical defect, the minor change that carries out on the power supply circuit that this application provides also can realize power supply circuit so, so adopt the similar other 3G of the power supply circuit that this application provides (such as WCDMA), 4G (such as LTE), and 5G NR standard architecture schemes are also within the protection scope of the present application. In addition, this application is aimed at the shortcomings of the APT power supply scheme in the related art, but the PA power consumption optimization technology such as ET, which has the same principle as APT, adopts the scheme of the power switch power supply structure in the power supply circuit provided by this application, which is also protected by this application. within range.

In one embodiment, the power supply circuits provided in the foregoing embodiments can be integrated into the terminal, so that the terminal can achieve the effect of reducing power consumption through any of the foregoing power supply circuits.

Based on the power supply circuit provided in the foregoing embodiments, an embodiment of the present application further provides a power supply method, which can be applied to the power supply circuit provided in any of the foregoing embodiments. It should be noted that, in a power supply method provided by the present application, the execution subject in Fig. 8-Fig. Hardware or a combination of software and hardware is implemented as part or all of the radio frequency transceiver.

It should also be noted that since this power supply method is the method used in the working process of the above-mentioned power supply circuit, that is, the detailed process in the power supply method is the same as the power supply process for the power amplifier described in the above-mentioned power supply circuit, therefore, the following provides The detailed process of each step in the embodiment of the power supply method is the same as the process of supplying power to the power amplifier in the above-mentioned power supply circuit, and can refer to the descriptions in the above-mentioned embodiments of the power supply circuit, and the specific power supply process will not be repeated in the embodiment of the power supply method.

Specifically, an embodiment of a power supply method is provided, as shown in FIG. 8, the embodiment includes the following steps:

S101. Obtain a control signal.

S102. Control the conduction state of the power switch according to the control signal, so as to select the path between the power supply and the power amplifier, or select the path between the power supply, the voltage converter and the power amplifier.

In one embodiment, as shown in FIG. 9, the above S101 includes the following steps:

S201. Acquire a power supply voltage of a power amplifier.

S202. Generate a control signal according to the power supply voltage and a preset voltage threshold.

In one embodiment, one method of the above-mentioned S202 includes: if the power supply voltage of the power amplifier is greater than the preset voltage threshold, generating a first control signal; the first control signal is used to control the power switch to select the connection between the power supply and the power amplifier. access.

In one embodiment, another method of S202 above includes: if the power supply voltage of the power amplifier is less than or equal to the preset voltage threshold, generating a second control signal; the second control signal is used to control the power switch to select the power supply, voltage The path between the converter and the power amplifier.

In one embodiment, as shown in FIG. 10, the above S201 includes the following steps:

S301. Acquire the current transmit signal power value of the terminal.

S302. According to the preset correspondence between the power range and the power supply voltage, determine the power supply voltage corresponding to the power range to which the power value of the current transmission signal belongs as the power supply voltage of the power amplifier.

In one embodiment, the above power switch includes a first power switch and a second power switch; then the above step S102 includes: according to the control signal, when the path between the power supply and the power amplifier is selected and turned on through the first power switch, through the second power switch The second power switch selects to turn off the path between the power supply, the voltage converter and the power amplifier; or, according to the control signal, when the second power switch selects to turn on the path between the power supply, the voltage converter and the power amplifier, through the first The power switch selects the path between the shutdown power supply and the power amplifier.

As shown in Figure 11, an embodiment of a power supply method is provided, which includes:

S401. Acquire the current transmit signal power value of the terminal.

S402. According to the preset correspondence between the power range and the power supply voltage, determine the power supply voltage corresponding to the power range to which the power value of the current transmission signal belongs as the power supply voltage of the power amplifier.

S403. If the power supply voltage of the power amplifier is greater than a preset voltage threshold, generate a first control signal.

S404. If the power supply voltage of the power amplifier is less than or equal to the preset voltage threshold, generate a second control signal.

S405. Control the first power switch to turn on according to the first control signal to selectively turn on the path between the power supply and the power amplifier, and control the second power switch to turn off according to the second control signal to selectively turn off the power supply and the voltage converter. path to the power amplifier.

S406. Control the first power switch to turn off according to the first control signal to selectively turn on the path between the power supply and the power amplifier, and control the second power switch to turn on according to the second control signal to selectively turn off the power supply and the voltage converter. path to the power amplifier.

The implementation principles and technical effects of the steps in the power supply method provided in this embodiment are similar to those in the previous power supply circuit embodiments, and will not be repeated here. The implementation of each step in the embodiment of FIG. 11 is just an example, and there is no limitation to each implementation. The order of each step can be adjusted in practical applications, as long as the purpose of each step can be achieved.

It should be understood that although the various steps in the flow charts of FIGS. 8-11 are shown sequentially as indicated by the arrows, these steps are not necessarily executed sequentially in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least some of the steps in FIGS. 8-11 may include multiple steps or stages. These steps or stages are not necessarily executed at the same time, but may be executed at different times. The execution of these steps or stages The sequence is not necessarily performed sequentially, but may be performed alternately or alternately with other steps or at least a part of steps or stages in other steps.

In addition, in an embodiment, a computer device is also provided, the computer device may be a terminal, and its internal structure may be as shown in FIG. 12 . The computer device includes a processor, a memory, a network interface, a display screen and an input device connected through a system bus. Wherein, the processor of the computer device is used to provide calculation and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The network interface of the computer device is used to communicate with an external terminal via a network connection. When the computer program is executed by the processor, a power supply method is realized. The display screen of the computer device may be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device may be a touch layer covered on the display screen, or a button, a trackball or a touch pad provided on the casing of the computer device , and can also be an external keyboard, touchpad or mouse.

Those skilled in the art can understand that the structure shown in Figure 12 is only a block diagram of a part of the structure related to the solution of this application, and does not constitute a limitation to the computer equipment on which the solution of this application is applied. The specific computer equipment can be More or fewer components than shown in the figures may be included, or some components may be combined, or have a different arrangement of components.

In one embodiment, a computer device is provided, including a memory and a processor, a computer program is stored in the memory, and the processor implements the following steps when executing the computer program:

Get the control signal;

According to the control signal, the conduction state of the power switch is controlled to select the path between the power supply and the power amplifier, or to select the path between the power supply, the voltage converter and the power amplifier.

In one embodiment, the processor implements the following steps when executing the computer program:

Obtain the power supply voltage of the power amplifier;

A control signal is generated based on a supply voltage and a preset voltage threshold.

In one embodiment, the processor implements the following steps when executing the computer program:

If the power supply voltage of the power amplifier is greater than the preset voltage threshold, a first control signal is generated; the first control signal is used to control the power switch to select and conduct the path between the power supply and the power amplifier.

In one embodiment, the processor implements the following steps when executing the computer program:

If the power supply voltage of the power amplifier is less than or equal to the preset voltage threshold, a second control signal is generated; the second control signal is used to control the power switch to select and conduct the path between the power supply, the voltage converter and the power amplifier.

In one embodiment, the processor implements the following steps when executing the computer program:

Obtain the current transmit signal power value of the terminal;

According to the corresponding relationship between the preset power range and the power supply voltage, the power supply voltage corresponding to the power range to which the current transmit signal power value belongs is determined as the power supply voltage of the power amplifier.

In one embodiment, the processor implements the following steps when executing the computer program:

According to the above control signal, when the path between the power supply and the power amplifier is selected to be turned on through the first power switch, the path between the power supply, the voltage converter and the power amplifier is selected to be turned off through the second power switch; or,

According to the above control signal, when the second power switch selects to turn on the power supply and the path between the voltage converter and the power amplifier, the first power switch selects to turn off the path between the power supply and the power amplifier.

The implementation principle and technical effect of the computer device provided in the foregoing embodiments are similar to those of the foregoing method embodiments, and will not be repeated here.

In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

Get the control signal;

According to the control signal, the conduction state of the power switch is controlled to select the path between the power supply and the power amplifier, or to select the path between the power supply, the voltage converter and the power amplifier.

In one embodiment, the computer program implements the following steps when executed by the processor:

Obtain the power supply voltage of the power amplifier;

A control signal is generated based on a supply voltage and a preset voltage threshold.

In one embodiment, the computer program implements the following steps when executed by the processor:

If the power supply voltage of the power amplifier is greater than the preset voltage threshold, a first control signal is generated; the first control signal is used to control the power switch to select and conduct the path between the power supply and the power amplifier.

In one embodiment, the computer program implements the following steps when executed by the processor:

If the power supply voltage of the power amplifier is less than or equal to the preset voltage threshold, a second control signal is generated; the second control signal is used to control the power switch to select and conduct the path between the power supply, the voltage converter and the power amplifier.

In one embodiment, the computer program implements the following steps when executed by the processor:

Obtain the current transmit signal power value of the terminal;

According to the corresponding relationship between the preset power range and the power supply voltage, the power supply voltage corresponding to the power range to which the current transmit signal power value belongs is determined as the power supply voltage of the power amplifier.

In one embodiment, the computer program implements the following steps when executed by the processor:

According to the above control signal, when the path between the power supply and the power amplifier is selected to be turned on through the first power switch, the path between the power supply, the voltage converter and the power amplifier is selected to be turned off through the second power switch; or,

According to the above control signal, when the second power switch selects to turn on the power supply and the path between the voltage converter and the power amplifier, the first power switch selects to turn off the path between the power supply and the power amplifier.

The implementation principle and technical effect of the computer-readable storage medium provided by the foregoing embodiments are similar to those of the foregoing method embodiments, and details are not repeated here.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above-mentioned embodiments can be completed by instructing related hardware through computer programs, and the computer programs can be stored in a non-volatile computer-readable memory In the medium, when the computer program is executed, it may include the processes of the embodiments of the above-mentioned methods. Wherein, any references to memory, storage, database or other media used in the various embodiments provided in the present application may include non-volatile and/or volatile memory. Nonvolatile memory can include read only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Chain Synchlin k) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

The technical features of the above embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be It is considered to be within the range described in this specification.

The above-mentioned embodiments only represent several implementation modes of the present application, and the description thereof is relatively specific and detailed, but it should not be construed as limiting the scope of the patent for the invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of protection of the patent application should be based on the appended claims.

Claims (12)

1. A power supply circuit, characterized in that, the power supply circuit comprises: a power supply, a voltage converter, a power switch, a power amplifier and a radio frequency transceiver; The power switch is connected, the output end of the voltage converter is connected to the power switch, the input end of the power amplifier is connected to the power switch, and the radio frequency transceiver is connected to the power switch; The radio frequency transceiver is configured to acquire the current transmit signal power value of the terminal, and determine the corresponding power supply voltage of the power range to which the current transmit signal power value belongs according to the corresponding relationship between the preset power range and the power supply voltage as the power supply voltage of the power amplifier, generating a control signal according to the power supply voltage and a preset voltage threshold; The power switch is used for selectively conducting the path between the power supply and the power amplifier according to the control signal output by the radio frequency transceiver, or selectively conducting the power supply, the voltage converter and the power amplifier. The paths between the power amplifiers, so that the power supply voltages provided to the power amplifiers are different for different output powers of the power amplifiers; wherein, the power switch includes a built-in resistor to reduce or eliminate all Parasitic capacitance generated when the power switch described above is turned off. 2. The power supply circuit according to claim 1, wherein the radio frequency transceiver is configured to transmit a first control signal to the power switch when the power supply voltage of the power amplifier is greater than a preset voltage threshold; The power switch is configured to selectively conduct the path between the power supply and the power amplifier according to the first control signal. 3. The power supply circuit according to claim 1, wherein the radio frequency transceiver is configured to transmit a second control to the power switch when the power supply voltage of the power amplifier is less than or equal to a preset voltage threshold Signal; The power switch is configured to selectively conduct the paths among the power supply, the voltage converter and the power amplifier according to the second control signal. 4. The power supply circuit according to any one of claims 1-3, wherein the power switch comprises a first power switch and a second power switch; The input end of the first power switch is connected to the power supply, the output end of the first power switch is connected to the power amplifier; the input end of the second power switch is connected to the voltage converter, and the The output end of the second power switch is connected to the power amplifier; When the first power switch selects to turn on the path between the power supply and the power amplifier, the second power switch selects to turn off the path between the power supply, the voltage converter and the power amplifier or, when the second power switch selects to turn on the path between the power supply, the voltage converter and the power amplifier, the first power switch selects to turn off the connection between the power supply and the power amplifier path between. 5. The power supply circuit according to claim 4, wherein the power switch includes a ground terminal, the ground terminal of the first power switch is connected to a first resistor, and the ground terminal of the second power switch is connected to a second resistor. 6. A terminal, characterized in that the terminal comprises the power supply circuit according to any one of claims 1-5. 7. A power supply method, characterized in that, the power supply method is applied to the power supply circuit according to any one of claims 1-5; the power supply method comprises: Acquiring the current transmission signal power value of the terminal, according to the correspondence between the preset power range and the power supply voltage, determining the corresponding power supply voltage of the power range to which the current transmission signal power value belongs as the power supply voltage of the power amplifier, according to the preset generating a control signal based on the power supply voltage and the preset voltage threshold; According to the control signal, control the conduction state of the power switch to selectively conduct the path between the power supply and the power amplifier, or selectively conduct the path between the power supply, the voltage converter and the power amplifier so that for different output powers of the power amplifier, the power supply voltage value provided to the power amplifier is also different; wherein, the power switch includes a built-in resistor to reduce or eliminate the parasitic generated when the power switch is turned off capacitance. 8. The power supply method according to claim 7, wherein the generating a control signal according to the power supply voltage and a preset voltage threshold comprises: If the power supply voltage of the power amplifier is greater than a preset voltage threshold, a first control signal is generated; the first control signal is used to control the power switch to select and conduct the path between the power supply and the power amplifier. 9. The power supply method according to claim 7, wherein the generating a control signal according to the power supply voltage and a preset voltage threshold comprises: If the power supply voltage of the power amplifier is less than or equal to the preset voltage threshold, a second control signal is generated; the second control signal is used to control the power switch to selectively conduct between the voltage converter and the power amplifier access. 10. The power supply method according to any one of claims 7-9, characterized in that, the power switch comprises a first power switch and a second power switch; the control signal of the power switch according to the control signal The conduction state is to selectively conduct the path between the power supply and the power amplifier, or to selectively conduct the path between the power supply, the voltage converter and the power amplifier, including: According to the control signal, when the path between the power supply and the power amplifier is selected to be turned on by the first power switch, the power supply, the voltage converter and the power amplifier are selected to be turned off by the second power switch. a path between said power amplifiers; or, According to the control signal, when the path between the power supply, the voltage converter and the power amplifier is selected to be turned on by the second power switch, the power supply and the power amplifier are selected to be turned off by the first power switch. path between the power amplifiers. 11. A computer device, comprising a memory and a processor, the memory stores a computer program, wherein the processor implements the power supply method according to any one of claims 7 to 10 when executing the computer program step. 12. A computer-readable storage medium, on which a computer program is stored, wherein when the computer program is executed by a processor, the steps of the power supply method according to any one of claims 7 to 10 are realized.

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