KR100313578B1 - Transmition device having temperature compensation device in code division multiple access mobile station - Google Patents

Abstract

The present invention relates to a transmission device having a temperature compensating device in a CDMA terminal, and more particularly, by measuring the temperature of a power amplifier through a temperature sensor and adjusting the gain of the driving amplifier to correspond to the temperature level. The present invention relates to a transmitter of a CDM terminal having a temperature compensating device for causing a signal to be transmitted. According to the transmitter having a temperature compensating device in a CDMA terminal according to the present invention, a temperature of a power amplifier is measured through a temperature sensor. After that, by providing a temperature compensation method that adjusts the gain of the driving amplifier to correspond to the temperature level, the RF signal generated by the transmitter in the terminal always has a constant output value regardless of the temperature change inside the transmitter. Not only improve the performance, but also compare it with conventional temperature compensation devices and methods. As viewed, there is an excellent effect because it does not produce a temperature table incorporated in the MSM that resulting device manufacturing process becomes easy and at the same time the terminal manufacturing period is shortened.

Description

Transmitter with temperature compensation device in CDMA terminal {TRANSMITION DEVICE HAVING TEMPERATURE COMPENSATION DEVICE IN CODE DIVISION MULTIPLE ACCESS MOBILE STATION}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a transmitter having a temperature compensating device in a code division multiple access (CDMA) terminal. In particular, the present invention corresponds to a temperature level after measuring a temperature of a power amplifier through a temperature sensor. The present invention relates to a transmitter having a temperature compensating device in a CDM terminal that allows a stable radio frequency (RF) signal to be transmitted at all times by adjusting the gain of the driving amplifier.

In the conventional CDMA terminal, as shown in Fig. 1, a transmission apparatus includes an MSM (Mobile Station Manager; hereinafter referred to as MSM) 1, a baseband analog unit 2, and an automatic gain controller ( Automatic Gain Controller (3), Up-Mixer (4), Drive Amplifire (5), SAW Filter (6), Power Amplifire (7) and Temperature It consisted of a sensor (Temperation Sensor) 8.

In this case, when the temperature compensation method of the conventional CDMA terminal transmission device is described, the temperature sensor 8 measures the temperature of the power amplifier 7 and then corresponds to a direct current (DC). A voltage signal is output to the baseband analog unit 2. Then, the baseband analog unit 2 receives the DC voltage signal output from the temperature sensor 8, converts it into an analog signal, and outputs the analog signal to the MSM 1. Subsequently, the MSM 1 receives a DC voltage signal output from the baseband analog unit 2 and detects a level value corresponding to the DC voltage signal from a built-in temperature table. . Then, the MSM 1 generates an auto gain control signal based on the level value corresponding to the DC voltage signal detected as described above, and then outputs the auto gain control signal to the auto gain controller 3. By adjusting the gain of the automatic gain controller 3. Therefore, the temperature compensation of the terminal transmission side is achieved by the gain adjustment of the automatic gain controller 3, whereby the output value of the RF signal is stabilized.

However, the temperature compensation device and method of the conventional CDMA terminal transmission device must be prepared in advance in the temperature table for the temperature compensation during the manufacturing process of the terminal and stored in the MSM, in this case, the manufacturing process of the temperature table for about 3 to 7 days In addition, the terminal manufacturing period is not only extended due to a lot of time required, but the same temperature table is applied to each terminal set. Therefore, if the RF characteristic change is severe according to the terminal set deviation, the temperature compensation is not performed well. There was a problem that the characteristics are deteriorated.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a CDMA such that an RF signal generated by a transmitter in a terminal always has a constant output value regardless of a temperature change in a transmitter. The present invention provides a transmitter having a temperature compensation device in a terminal.

Another object is to provide a transmitter having a temperature compensating device in a CDA terminal for shortening the terminal manufacturing period by preventing a terminal manufacturer from manufacturing a temperature compensation temperature table.

In order to achieve the above object, a transmitter having a temperature compensating device in a CDMA terminal of the present invention detects a level of an RF received signal, calculates a transmission level of the RF signal, and then corresponds to a corresponding automatic gain control for transmission. An MSM for outputting a signal; An automatic gain controller that automatically receives a transmission IF signal from a transmission front end block and automatically adjusts a gain of the transmission IF signal by a transmission automatic gain control signal output from the MSM; A voltage controlled oscillator for generating a carrier oscillation frequency; An up-mixer for generating an RF signal by mixing the transmission IF signal output from the automatic gain controller and the carrier oscillation frequency output from the voltage controlled oscillator; A driving amplifier receiving the RF signal from the up-mixer and amplifying the RF signal by a corresponding gain and then outputting the amplified signal; An SAW filter for filtering only a corresponding band after receiving an RF signal from the driving amplifier; A power amplifier receiving the RF signal from the SAW filter and amplifying the transmission power; A temperature sensor for sensing a temperature of the power amplifier and outputting a corresponding DC voltage; A reference voltage generator for generating a reference voltage signal; And a bias voltage controller configured to receive a reference voltage signal from the reference voltage generator and to receive a DC voltage from the temperature sensor, generate a gain control bias control voltage signal of the driving amplifier, and output the bias control voltage signal to the driving amplifier. It features.

Fig. 1 is a functional block diagram showing the structure of a transmission apparatus in a conventional CDMA terminal.

FIG. 2 is a circuit diagram showing the configuration of a transmitting apparatus having a temperature compensating apparatus in a CDA terminal according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: MSM 200: automatic gain controller

300: voltage controlled oscillator 400: up-mixer

500: driving amplifier 501: first bias voltage stabilization circuit portion

502: power supply noise removing circuit section 503: first power supply stabilization circuit section

504: First transistor 505: First bypass circuit section

506: second bias voltage stabilization circuit portion

507: Second power supply stabilization circuit portion 508: Second transistor

509: second bypass circuit 600: SAW filter

700: power amplifier 800: temperature sensor

900: reference voltage generator 1000: bias voltage controller

1001: OP-Amp

C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13: Condenser

L1, L2, L3, L4, L5: Coil

R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11: resistor

Hereinafter, a transmission apparatus including a temperature compensating apparatus in a CDA terminal according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a circuit diagram showing the configuration of a transmitter having a temperature compensating device in a CDA terminal according to an embodiment of the present invention, and a transmitter having a temperature compensating device in a CDMA terminal according to an embodiment of the present invention. MSM 100, automatic gain controller 200, voltage controlled oscillator 300, up-mixer 400, drive amplifier 500, SAW filter 600, power amplifier 700, temperature sensor 800 , A reference voltage generator 900, and a bias voltage controller 1000.

The MSM 100 detects a level of an RF received signal received from an antenna (not shown) to calculate a transmission level of the RF signal, and then outputs a corresponding automatic gain control signal for transmission according to the automatic gain controller ( 200) to output.

In addition, the automatic gain controller 200 receives an intermediate frequency signal (hereinafter referred to as IF) from the front end block of the transmitting side and simultaneously inputs an automatic gain control signal for transmission from the MSM 100. In response to the automatic gain control signal output from the MSM 100, the gain of the transmission IF signal is automatically adjusted and then output to the up-mixer 400.

On the other hand, the voltage controlled oscillator 300 generates a carrier oscillation frequency and serves to output to the up-mixer 400.

In addition, the up-mixer 400 generates an RF signal by mixing the transmission IF signal output from the automatic gain controller 200 and the carrier oscillation frequency output from the voltage controlled oscillator 300 to generate an RF signal. It serves to output to the amplifier (500).

On the other hand, the driving amplifier 500 is a gain is adjusted by the bias voltage control signal output from the bias voltage controller 1000, receives the RF signal output from the up-mixer 400 and amplified by the corresponding gain The SAW filter 600 is then output to the SAW filter 600 and includes a first bias voltage stabilization circuit unit 501, a power supply noise removing circuit unit 502, a first power stabilization circuit unit 503, and a first transistor 504. And a first bypass circuit section 505, a second bias voltage stabilization circuit section 506, a second power stabilization circuit section 507, a second transistor 508, and a second bypass circuit section 509. do.

In this case, the first bias voltage stabilization circuit unit 501 mounted in the driving amplifier 500 has a resistor R5 and a coil L1 connected to the output terminal of the bias voltage controller 1000 in series, respectively. A condenser C5 is connected in parallel between the resistor R5 and the coil L1, and is output from the bias voltage controller 1000 to receive a bias control voltage signal that has passed through the condenser C3. It blocks the voltage from being emitted to the outside and stabilizes the DC voltage.

In addition, in the power supply noise removing circuit unit 502 mounted in the driving amplifier 500, the coil L3 is connected in series to the power supply input terminal of the transmitting side, and the capacitors C7 and C8 are connected to both ends of the coil L3. Each of them is connected in parallel, and receives power from the transmitting side to remove power noise.

On the other hand, the first power stabilization circuit unit 503 mounted in the driving amplifier 500 has a resistor (R7) and a coil (L2) connected in parallel to the output terminal of the power supply noise canceling circuit unit 502 and at the same time the resistance A capacitor C9 is connected in parallel between the R7 and the coil L2, and the power supply noise removing circuit 502 receives power from the transmitting side to remove power noise and to adjust current. Play a role.

In addition, the first transistor 504 mounted in the driving amplifier 500 has a base terminal connected to the capacitor C4 and the coil L1 connected to the signal output terminal of the up-mixer 400. A collector terminal is connected to the coil L2, and is driven by a transmission power source that has passed through the first power source stabilization circuit unit 503, and is connected to a bias control voltage signal output from the bias voltage controller 1000. After the gain control by the first function to amplify the RF signal output from the up-mixer 400.

On the other hand, the first bypass circuit unit 505 mounted in the driving amplifier 500 has a resistor R6 and a capacitor C6 connected in parallel to the emitter terminal of the first transistor 504. Each is connected in series and serves to bypass the power source for the transmission side.

In addition, the second bias voltage stabilization circuit unit 506 mounted in the driving amplifier 500 has a resistor (R9) and a coil (L4) connected in series to the output terminal of the bias voltage controller 1000, and at the same time the resistance ( A capacitor C11 is connected in parallel between R9) and the coil L4 to receive the bias control voltage signal from the bias voltage controller 1000 to block the DC voltage from being discharged to the outside and to stabilize the DC voltage. It plays a role.

On the other hand, the second power stabilization circuit unit 507 mounted in the driving amplifier 500 has a resistor R11 and a coil L5 connected in parallel to the output terminal of the power noise removing circuit unit 502, and at the same time the resistance ( The capacitor C13 is connected in parallel between the R11) and the coil L5, and the power supply noise removing circuit 502 receives the power supply from the transmitting side, removes power supply noise, and controls current.

In addition, the second transistor 508 mounted in the driving amplifier 500 has a base terminal connected to the matching circuits C10 and R8 and the coil L4 connected to the collector terminal of the first transistor 504. At the same time, a collector terminal is connected to the coil L5, and is driven by a transmission power source that has passed through the second power supply stabilization circuit unit 507, and is gained by the bias control voltage signal output from the bias voltage control unit 1000. After being adjusted, the first transistor 504 serves to amplify the first amplified RF signal.

In the second bypass circuit 509 mounted in the driving amplifier 500, a resistor R10 and a capacitor C12 connected in parallel to the emitter terminal of the second transistor 508 are connected in series. Is connected, and serves to bypass the power source of the transmission side.

Meanwhile, the SAW filter 600 receives the RF signal from the driving amplifier 500 and filters only the corresponding band to output the power to the power amplifier 700.

In addition, the power amplifier 700 receives the RF signal output from the SAW filter 600 and amplifies the transmission power and outputs the RF signal to a duplexer (not shown).

Meanwhile, the temperature sensor 800 detects a temperature emitted from the power amplifier 700 and outputs a DC voltage corresponding thereto to the bias voltage controller 1000.

In addition, the reference voltage generator 900 generates a reference voltage signal and outputs the generated reference voltage signal to the bias voltage controller 1000.

Meanwhile, the bias voltage controller 1000 receives the reference voltage signal output from the reference voltage generator 900 and receives the DC voltage output from the temperature sensor 800, and the driving amplifier 500. After generating the gain control bias control voltage signal of the driving amplifier 500 and outputs to the base terminal of the first transistor 504 and the second transistor 508, OP-Amplifier ( 1001).

At this time, the OP-amplifier 1001 is connected to the signal output terminal of the temperature sensor 800, the input terminal (a) is connected to the resistor (R1, R2, R3) and the capacitor (C1) at the same time the reference voltage generator An input terminal (b) is connected to the signal output terminal of 900, a feedback resistor (R4) and a feedback capacitor (C2) are connected between the input terminal (a) and the output terminal (c). The reference voltage signal output from the generator 900 and the DC voltage output from the temperature sensor 800 are input to generate a bias control voltage signal corresponding to the DC voltage, and then mounted in the driving amplifier 500. Outputs to the base terminals of the first transistor 504 and the second transistor 508.

Next, a transmitting apparatus including a temperature compensating apparatus in the CDA terminal having the above configuration will be described with reference to FIG. 2.

First, the MSM 100 detects a level of an RF received signal to calculate a transmission level of the RF signal, and then outputs a corresponding automatic gain control signal for transmission to the automatic gain controller 200.

Then, the automatic gain controller 200 receives the transmission IF signal from the MSB 100 at the same time as receiving the transmission IF signal from the front end block of the transmission side, and outputs the transmission from the MSM 100. The gain of the transmission IF signal is automatically adjusted by the credit auto gain control signal and then output to the up-mixer 400.

In this case, the voltage controlled oscillator 300 generates a carrier oscillation frequency and outputs it to the up-mixer 400.

In addition, the up-mixer 400 generates an RF signal by mixing the transmission IF signal output from the automatic gain controller 200 and the carrier oscillation frequency output from the voltage controlled oscillator 300 to generate an RF signal. Output to the amplifier 500.

On the other hand, the temperature sensor 800 detects the temperature emitted from the power amplifier 700, the corresponding DC voltage of the input terminal of the OP-amp 1001 mounted in the bias voltage controller 1000 ( output as a)

The reference voltage generator 900 generates a reference voltage signal and outputs the reference voltage signal to the input terminal b of the OP-amplifier 1001 mounted in the bias voltage controller 1000.

Subsequently, the OP-amplifier 1001 mounted in the bias voltage controller 1000 receives a reference voltage signal output from the reference voltage generator 900 and a DC voltage output from the temperature sensor 800. A bias control voltage signal is generated to correspond to the DC voltage and then output to a base terminal of the first transistor 504 and the second transistor 508 mounted in the driving amplifier 500.

Then, the first transistor 504 and the second transistor 508 mounted in the driving amplifier 500 receive the bias control voltage signal output from the OP-AMP 1001 and adjust the bias point to correspond thereto. do. Thus, the gain of the first transistor 504 and the second transistor 508 mounted in the drive amplifier 500 is consequently adjusted according to the temperature of the power amplifier 700.

Then, after the gain is determined as described above, the first transistor 504 and the second transistor 508 mounted in the driving amplifier 500 amplify the RF signal output from the up-mixer 400. Output to the SAW filter 600.

Then, the SAW filter 600 receives the RF signal output from the driving amplifier 500 and filters only the corresponding band and outputs the RF signal to the power amplifier 700.

Subsequently, the power amplifier 700 receives an RF signal output from the SAW filter 600 and amplifies the RF signal by the transmission power and outputs the RF signal to a duplexer (not shown).

Therefore, as described above, the RF signal generated by the transmitter of the terminal is compensated by the driving amplifier 500, so that the output signal always has a constant output regardless of the temperature change inside the transmitter.

As described above, according to the transmitter having a temperature compensating device in a CDA terminal according to the present invention, a temperature for measuring the temperature of the power amplifier through a temperature sensor and then adjusting the gain of the driving amplifier to correspond to the temperature level By providing a compensation method, it ensures that the RF signal generated by the transmitter in the terminal always has a constant output value regardless of the temperature change in the transmitter, thereby improving the reliability of the product and comparing it with the conventional temperature compensation apparatus and method. At this time, since the temperature table stored in the MSM does not have to be manufactured, the terminal manufacturing process is simplified and the terminal manufacturing period is shortened.

Claims (3)

An MSM for detecting a level of the RF received signal to calculate a transmission level of the RF signal and then outputting a corresponding automatic gain control signal for transmission; An automatic gain controller that automatically receives a transmission IF signal from a transmission front end block and automatically adjusts a gain of the transmission IF signal by a transmission automatic gain control signal output from the MSM; A voltage controlled oscillator for generating a carrier oscillation frequency; An up-mixer for generating an RF signal by mixing the transmission IF signal output from the automatic gain controller and the carrier oscillation frequency output from the voltage controlled oscillator; A driving amplifier receiving the RF signal from the up-mixer and amplifying the RF signal by a corresponding gain and then outputting the amplified signal; An SAW filter for filtering only a corresponding band after receiving an RF signal from the driving amplifier; A power amplifier receiving the RF signal from the SAW filter and amplifying the transmission power; A temperature sensor for sensing a temperature of the power amplifier and outputting a corresponding DC voltage; A reference voltage generator for generating a reference voltage signal; And a bias voltage controller configured to receive a reference voltage signal from the reference voltage generator and to receive a DC voltage from the temperature sensor, generate a gain control bias control voltage signal of the driving amplifier, and output the bias control voltage signal to the driving amplifier. A transmitter comprising a temperature compensation device in a CDM terminal. The method of claim 1, In the driving amplifier, a resistor R5 and a coil L1 are connected in series to the output terminal of the bias voltage controller, and a capacitor C5 is connected in parallel between the resistor R5 and the coil L1. A first bias voltage stabilization circuit unit which receives a bias control voltage signal from the bias voltage controller to block the DC voltage from being discharged to the outside and to stabilize the DC voltage; Coil L3 is connected in series to the power input terminal of the transmission side, and capacitors C7 and C8 are connected in parallel to both ends of the coil L3, respectively. A removal circuit portion; The resistor R7 and the coil L2 are connected in parallel to the output terminal of the power noise removing circuit section, and the capacitor C9 is connected in parallel between the resistor R7 and the coil L2 to remove the power noise. A first power stabilization circuit unit which receives power from a transmitting side from the circuit unit, removes power noise, and adjusts current; A base terminal is connected to the condenser C4 and the coil L1 connected to the signal output terminal of the up-mixer, and a collector terminal is connected to the coil L2, and is connected to the bias control voltage signal output from the bias voltage controller. A first transistor for first amplifying the RF signal output from the up-mixer after gain adjustment by the first signal; A first bypass circuit section in which resistors R6 and capacitors C6 connected in parallel to the emitter terminals of the first transistor are connected in series; A resistor R9 and a coil L4 are connected in series to the output terminal of the bias voltage controller, and a capacitor C11 is connected in parallel between the resistor R9 and the coil L4. A second bias voltage stabilization circuit unit which receives the bias control voltage signal and blocks the DC voltage from being discharged to the outside and stabilizes the DC voltage; A resistor R11 and a coil L5 are connected in parallel to the output terminal of the power noise removing circuit unit, and a capacitor C13 is connected in parallel between the resistor R11 and the coil L5 to remove the power noise. A second power stabilization circuit unit which receives power from a transmitting side from the circuit unit, removes power noise, and regulates current; A bias terminal is connected to the matching circuits C10 and R8 and the coil L4 connected to the collector terminal of the first transistor and a collector terminal is connected to the coil L5 and output from the bias voltage controller. A second transistor configured to secondly amplify the first amplified RF signal through the first transistor after gain control by a control voltage signal; And a second bypass circuit section in which a resistor (R10) and a capacitor (C12) connected in parallel to the emitter terminals of the second transistor are connected in series, respectively. One transmitter. The method of claim 1, The bias voltage controller includes an input terminal a connected to the resistors R1, R2, and R3 connected to the signal output terminal of the temperature sensor, and an input terminal b connected to the signal output terminal of the reference voltage generator. A feedback resistor R4 and a feedback capacitor C2 are connected between the input terminal a and the output terminal c to input a reference voltage signal output from the reference voltage generator and a DC voltage output from the temperature sensor. Receiving and generating a bias control voltage signal corresponding to the DC voltage, and then outputting the signal to a base terminal of the first transistor and the second transistor mounted in the driving amplifier. Transmission device provided with a device.