CN219919145U - Audio noise reduction circuit and system - Google Patents
Audio noise reduction circuit and system Download PDFInfo
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- CN219919145U CN219919145U CN202321324536.XU CN202321324536U CN219919145U CN 219919145 U CN219919145 U CN 219919145U CN 202321324536 U CN202321324536 U CN 202321324536U CN 219919145 U CN219919145 U CN 219919145U
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Abstract
The utility model discloses an audio noise reduction circuit, which comprises an audio power supply transmitting circuit and an audio power supply receiving circuit, wherein the audio power supply transmitting circuit and the audio power supply receiving circuit wirelessly supply power in an induction coil power supply mode; an audio signal transmitting circuit electrically connected with the audio power supply receiving circuit; an audio signal receiving circuit wirelessly connected with the audio signal transmitting circuit; and the audio control playing circuit is electrically connected with the audio signal receiving circuit. The utility model further comprises an audio noise reduction system. According to the utility model, the audio power supply transmitting circuit and the audio power supply receiving circuit supply power to the audio signal transmitting circuit in a wireless induction coil power supply mode, so that the ground wire of the power supply circuit is separated from the ground wire of the audio signal transmitting circuit, and the transmitted audio signal has no noise, and the problem of high noise when the projector and the audio playing device are connected in a wireless audio mode in the prior art is effectively solved.
Description
Technical Field
The utility model relates to the technical field of communication, in particular to an audio noise reduction circuit and an audio noise reduction system.
Background
With rapid development of information technology, projectors are used more and more frequently, and applications thereof relate to fields of education, business, engineering, home, office, and the like. Because the projector projects pictures with large size, short focal length and high definition, eyes are not injured, and the projector is favored by many users, the sales volume of the projector exceeds that of a television at present; but at present, in the case of projector products, the video problem is solved, the audio problem is not solved, and the following aspects are mainly represented: 1, an external audio power amplifier device of a projector in the prior art generally adopts wired construction for wiring, and is limited by connecting wires, so that the aesthetic degree of the use environment is influenced; 2, the existing projector has small built-in sound, poor tone quality, no sound from the direction of the screen, mismatching with the projector picture and poor experience; 3, the built-in bluetooth audio emission of current projecting apparatus can accomplish wireless connection with bluetooth stereo set, but picture and sound can not be synchronous, and the time delay is serious, experiences poorly. To solve the above stated problems of projector sound, manufacturers generally start from the following aspects: firstly, the problems of small sound, poor tone quality and sound azimuth sense of a projector can be solved by adopting an external power amplifier device; secondly, the low-delay special audio wireless transmitting and receiving technology is adopted to solve the problem of wired connection between the projector and the external power amplifier device, so that the use of consumers is facilitated, and meanwhile, the problem of asynchronous images and sounds of the projector is solved; thirdly, the projector USB (TYPE C, MICRO USB) is used for supplying power, and the projector earphone port (3.5 audio output port) is used as an audio signal source port, so that the problem of convenience in power supply and the problem of sound source of most projector audio emission systems are solved; fourth, because the power supply port of the projector USB (TYPE C, MICRO USB) and the earphone port (3.5 audio output port) are commonly connected, the noise of the wireless transmission audio signal is large, the user cannot hear, and the user experience is seriously affected; therefore, the audio noise reduction circuit and the audio noise reduction system are provided, and are used for solving the problem that in the prior art, when wireless audio connection is carried out between a projector and audio playing device equipment, the noise is large.
Disclosure of Invention
One of the purposes of the present utility model is to provide an audio noise reduction circuit and system, so as to solve the problem of large noise when wireless audio connection is performed between a projector and audio playing device in the prior art.
The utility model relates to an audio noise reduction circuit and a system, which can be realized by the following technical scheme:
the utility model relates to an audio noise reduction circuit which comprises an audio power supply transmitting circuit and an audio power supply receiving circuit, wherein the audio power supply transmitting circuit and the audio power supply receiving circuit are used for wirelessly supplying power in a wireless induction coil power supply mode; the audio signal transmitting circuit is electrically connected with the audio power supply receiving circuit, supplies power through the audio power supply receiving circuit and can wirelessly transmit audio signals; the audio signal receiving circuit is wirelessly connected with the audio signal transmitting circuit and is used for receiving the audio signal transmitted by the audio signal transmitting circuit; and the audio control playing circuit is electrically connected with the audio signal receiving circuit and plays the audio information received by the audio signal receiving circuit.
In one embodiment, the audio noise reduction circuit further comprises an audio power supply circuit which is electrically connected with the audio control playing circuit and the audio signal receiving circuit respectively.
In one embodiment, the audio power supply transmitting circuit comprises an inverter circuit and a transmitting induction coil, wherein the transmitting induction coil is electrically connected with the inverter circuit; the inverter circuit converts direct current into alternating current and then transmits the alternating current to surrounding space through the transmitting induction coil.
In one embodiment, the audio power supply receiving circuit comprises a receiving induction coil and a rectifying and filtering circuit, wherein two ends of the rectifying and filtering circuit are respectively and electrically connected with the receiving induction coil and the audio signal transmitting circuit; the receiving induction coil receives the alternating current emitted by the emitting induction coil.
In one embodiment, the audio signal transmitting circuit includes a wireless communication transmitting module, where the wireless communication transmitting module is one or more of a bluetooth wireless communication module, a WiFi wireless communication module, a 2.4G wireless communication module and a 5.8G wireless communication module.
In one embodiment, the audio signal receiving circuit includes a wireless communication receiving module, and the wireless communication receiving module adopts one or more of a bluetooth wireless communication module, a WiFi wireless communication module, a 2.4G wireless communication module and a 5.8G wireless communication module.
An audio noise reduction system comprises an audio emission device, an audio playing device and a projection device; the audio emission device is detachably and electrically connected to the projection device; the audio transmitting device is in wireless connection with the audio playing device; the audio power supply transmitting circuit, the audio power supply receiving circuit and the audio signal transmitting circuit of any one of the above are integrally provided in the audio transmitting device.
In one embodiment, the audio transmitting device is provided with an interface, and the audio transmitting device is detachably and electrically connected to the projection device through the interface.
In one embodiment, the interface is a Type-C interface, a micro usb interface, or a lighting interface.
In one embodiment, the audio playing device is a full-range speaker, a tweeter, a midrange speaker, or a woofer.
Compared with the prior art, the audio noise reduction circuit and the audio noise reduction system have the beneficial effects that:
according to the audio noise reduction circuit and the audio noise reduction system, the audio power supply transmitting circuit and the audio power supply receiving circuit are matched with each other to supply power to the audio signal transmitting circuit in an induction coil power supply mode, so that the ground wire of the power supply circuit is separated from the ground wire of the audio signal transmitting circuit, the transmitted audio signal is free of noise, and the problem that noise is large when wireless audio connection is carried out between a projector and audio playing device equipment in the prior art is effectively solved; meanwhile, the circuit has the characteristics of simple structure, ingenious design and low cost, perfectly realizes the function of no noise when in wireless connection between projection equipment and audio playing device equipment, and has certain market popularization potential.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an electrical connection structure of an audio noise reduction circuit of the present utility model, including an audio power transmitting circuit, an audio power receiving circuit, an audio signal transmitting circuit, an audio control playing circuit, an audio signal receiving circuit, and an audio power supplying circuit;
FIG. 2 is a circuit diagram of an audio power transmitting circuit, an audio power receiving circuit, and an audio signal transmitting circuit in the audio noise reduction circuit of the present utility model shown in FIG. 1;
FIG. 3 is a circuit diagram of an audio playback control circuit in the audio noise reduction circuit of FIG. 1 according to the present utility model;
FIG. 4 is a circuit diagram of an audio signal receiving circuit in the audio noise reduction circuit of FIG. 1 according to the present utility model;
FIG. 5 is a circuit diagram of an audio power supply circuit in the audio noise reduction circuit of FIG. 1 according to the present utility model;
fig. 6 is a schematic electrical connection structure of an audio noise reduction system according to the present utility model.
The figures indicate: an audio transmitting apparatus; an audio power supply transmitting circuit; 12, an audio power supply receiving circuit; an audio signal transmitting circuit; 20, an audio playing device; 21, an audio control playing circuit; 22, an audio signal receiving circuit; 23, an audio power supply circuit; 30, a projection device.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-5, an audio noise reduction circuit of the present utility model may be applied to a projection device and a television device, and mainly includes an audio power supply transmitting circuit 11, an audio power supply receiving circuit 12, an audio signal transmitting circuit 13, an audio control playing circuit 21, an audio signal receiving circuit 22 and an audio power supply circuit 23; the audio power supply transmitting circuit 11 and the audio power supply receiving circuit 12 perform wireless power supply in an induction coil power supply mode; the audio signal transmitting circuit 13 is electrically connected with the audio power supply receiving circuit 12, the audio power supply receiving circuit 12 provides electric energy for the audio signal transmitting circuit 13, and the audio signal transmitting circuit 13 is used for transmitting audio signals; the audio signal receiving circuit 22 is wirelessly connected with the audio signal transmitting circuit 13, and receives the audio signal transmitted by the audio signal transmitting circuit 13; the audio control playing circuit 21 is electrically connected with the audio signal receiving circuit 22, and the audio control playing circuit 21 plays the audio signal received by the audio signal receiving circuit 22; the audio power supply circuit 23 is electrically connected to the audio control playing circuit 21 and the audio signal receiving circuit 22, and provides electric energy to the audio control playing circuit 21 and the audio signal receiving circuit 22.
Referring to fig. 1 and 2, in the present embodiment, the audio power supply transmitting circuit 11 includes an inverter circuit and a transmitting induction coil, and the transmitting induction coil is electrically connected to the inverter circuit; the inverter circuit converts direct current on the projection equipment into alternating current and then transmits the alternating current to the surrounding space through the transmitting induction coil; the audio power supply receiving circuit 12 comprises a receiving induction coil and a rectifying and filtering circuit, and two ends of the rectifying and filtering circuit are respectively and electrically connected with the receiving induction coil and the audio signal transmitting circuit 13; the receiving induction coil receives the alternating current emitted by the emitting induction coil, and the rectifying and filtering circuit performs rectifying and filtering operation on the alternating current received by the receiving induction coil to obtain a stable power supply to supply power to the audio signal emitting circuit 13. The audio signal transmitting circuit 13 includes a wireless communication transmitting module, through which audio information is sent to the audio signal receiving circuit 22 for receiving, where the wireless communication transmitting module may be one or more of a bluetooth wireless communication module, a WiFi wireless communication module, a 2.4G wireless communication module, and a 5.8G wireless communication module, and in this embodiment, the wireless communication transmitting module is a bluetooth wireless communication module, and specifically, a chip model of the wireless communication transmitting module is an AD6976M, which is a 32-pin chip; in other embodiments, the wireless communication transmitting module may also be a wireless transmitting module of other types, as long as the present utility model is satisfied.
Referring to fig. 1 and 3, the audio control playing circuit 21 plays the audio signal received by the audio signal receiving circuit 22; in this embodiment, the audio control playing circuit 21 includes a control chip, and the model adopted by the control chip is SGM4703, which is a 28-pin chip; in other embodiments, the control chip may also be a control chip of other types, as long as the present utility model is satisfied.
Referring to fig. 1 and fig. 4, in this embodiment, the audio signal receiving circuit 22 includes a wireless communication receiving module, through which the audio signal transmitted by the audio signal transmitting circuit 13 is received, where the wireless communication receiving module may use one or more of a bluetooth wireless communication module, a WiFi wireless communication module, a 2.4G wireless communication module, and a 5.8G wireless communication module, and in this embodiment, the wireless communication receiving module uses a bluetooth wireless communication module, specifically, a chip model of the wireless communication receiving module is an AD6976M, which is a 32 pin chip; in other embodiments, the wireless communication receiving module may also adopt other types of wireless receiving modules, as long as the present utility model is satisfied.
Referring to fig. 1 and 5, in the present embodiment, the audio power supply circuit 23 provides a stable dc voltage to the audio control playing circuit 21 and the audio signal receiving circuit 22, respectively.
Referring to fig. 6, an audio noise reduction system of the present utility model includes an audio transmitting apparatus 10, an audio playing apparatus 20 and a projecting apparatus 30; the audio emission device 10 is detachably and electrically connected to the projection device 30, and the projection device 30 supplies power to the audio emission device 10; the audio transmitting device 10 is wirelessly connected with the audio playing device 20, and the audio playing device 20 receives the audio signal transmitted by the audio transmitting device 10 to play; the audio power supply transmitting circuit 11, the audio power supply receiving circuit 12, and the audio signal transmitting circuit 13 of any one of the above are integrally provided in the audio transmitting apparatus 10; the audio control playback circuit 21, the audio signal receiving circuit 22, and the audio power supply circuit 23 of any of the above are integrated in the audio playback device 20. In this embodiment, an interface is provided on the audio transmitting apparatus 10, and the audio transmitting apparatus 10 is detachably and electrically connected to the projection apparatus 30 through the interface, specifically, the interface may be a Type-C interface, a micro USB interface, or a Lightning interface, and preferably, the interface is a USB interface. The audio playing device 20 may be a full-range speaker, a tweeter, a midrange speaker, or a woofer, and in this embodiment, the audio playing device 20 is a woofer.
It should be noted that, according to the audio noise reduction circuit and the audio noise reduction system, the audio signal transmitting circuit 13 is powered by the wireless induction coil power supply mode between the audio power supply transmitting circuit 11 and the audio power supply receiving circuit 12, so that the audio signal transmitting circuit 13 does not need to be connected with a power supply circuit in a common ground mode, and noise is not generated; the audio control playing circuit 21 can play the audio information received by the audio signal receiving circuit 22 through the cooperation of the wireless transmission and receiving audio information between the audio signal transmitting circuit 13 and the audio signal receiving circuit 22.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (10)
1. The audio noise reduction circuit is characterized by comprising an audio power supply transmitting circuit and an audio power supply receiving circuit, wherein the audio power supply transmitting circuit and the audio power supply receiving circuit are used for wirelessly supplying power in an induction coil power supply mode; the audio signal transmitting circuit is electrically connected with the audio power supply receiving circuit, supplies power through the audio power supply receiving circuit and can wirelessly transmit audio signals; the audio signal receiving circuit is wirelessly connected with the audio signal transmitting circuit and is used for receiving the audio signal transmitted by the audio signal transmitting circuit; and the audio control playing circuit is electrically connected with the audio signal receiving circuit and plays the audio information received by the audio signal receiving circuit.
2. The audio noise reduction circuit of claim 1, further comprising an audio power supply circuit electrically connected to the audio control playback circuit and the audio signal receiving circuit, respectively.
3. The audio noise reduction circuit according to claim 2, wherein the audio power supply transmitting circuit comprises an inverter circuit and a transmitting induction coil, the transmitting induction coil being electrically connected to the inverter circuit; the inverter circuit converts direct current into alternating current and then transmits the alternating current to surrounding space through the transmitting induction coil.
4. An audio noise reduction circuit according to claim 3, wherein the audio power supply receiving circuit comprises a receiving induction coil and a rectifying and filtering circuit, and two ends of the rectifying and filtering circuit are respectively and electrically connected with the receiving induction coil and the audio signal transmitting circuit; the receiving induction coil receives the alternating current emitted by the emitting induction coil.
5. The audio noise reduction circuit according to claim 2, wherein the audio signal transmitting circuit comprises a wireless communication transmitting module, and the wireless communication transmitting module adopts one or more of a bluetooth wireless communication module, a WiFi wireless communication module, a 2.4G wireless communication module and a 5.8G wireless communication module.
6. The audio noise reduction circuit of claim 5, wherein the audio signal receiving circuit comprises a wireless communication receiving module, and the wireless communication receiving module is one or more of a bluetooth wireless communication module, a WiFi wireless communication module, a 2.4G wireless communication module, and a 5.8G wireless communication module.
7. An audio noise reduction system is characterized by comprising an audio emission device, an audio playing device and a projection device; the audio emission device is detachably and electrically connected to the projection device; the audio transmitting device is in wireless connection with the audio playing device; the audio powered transmitting circuit, the audio powered receiving circuit, and the audio signal transmitting circuit of any of claims 1-6 are integrally disposed in the audio transmitting device.
8. An audio noise reduction system according to claim 7, wherein the audio emitting device is provided with an interface, and the audio emitting device is detachably and electrically connected to the projection device through the interface.
9. The audio noise reduction system according to claim 8, wherein the interface is a Type-C interface, a micro usb interface, or a lighting interface.
10. The audio noise reduction system according to claim 7, wherein the audio playing device is a full-range speaker, a tweeter, a midrange speaker, or a woofer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321324536.XU CN219919145U (en) | 2023-05-29 | 2023-05-29 | Audio noise reduction circuit and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321324536.XU CN219919145U (en) | 2023-05-29 | 2023-05-29 | Audio noise reduction circuit and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219919145U true CN219919145U (en) | 2023-10-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321324536.XU Active CN219919145U (en) | 2023-05-29 | 2023-05-29 | Audio noise reduction circuit and system |
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|---|---|
| CN (1) | CN219919145U (en) |
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2023
- 2023-05-29 CN CN202321324536.XU patent/CN219919145U/en active Active
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