CN210225732U - Audio processing circuit - Google Patents
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- CN210225732U CN210225732U CN201921467909.2U CN201921467909U CN210225732U CN 210225732 U CN210225732 U CN 210225732U CN 201921467909 U CN201921467909 U CN 201921467909U CN 210225732 U CN210225732 U CN 210225732U
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Abstract
The utility model discloses an audio processing circuit, which comprises a main power supply module, an audio signal input module, a capacitor microphone power supply module, an audio processing module, a gain amplification module, an electronic switch module, a main control module, a microphone opening and closing control module, a microphone waiting indication module and an audio output interface, wherein the audio signal input module is internally provided with the capacitor microphone input interface; the capacitor microphone core power supply module is internally provided with a noise reduction polar capacitor for reducing noise, the gain amplification module is internally provided with a differential amplifier for gain amplification and improving the signal-to-noise ratio, the electronic switch module is internally provided with an electronic switch which can not generate impact noise during action, and the total power supply module is internally provided with a +12V voltage power supply unit, a-12V voltage power supply unit, a VCC5 voltage power supply unit and a +12V voltage power supply unit which are used for avoiding mutual interference and are relatively independently arranged. The utility model discloses the interference killing feature is strong, has guaranteed the quality of audio frequency greatly, has strengthened user experience.
Description
Technical Field
The utility model relates to an audio frequency processing technology field, in particular to audio frequency processing circuit.
Background
At present, for an audio processing circuit on the market, because the circuit structure is simple, the anti-interference capability is poor when the audio processing circuit is used, so that the tone quality can be influenced, and the user experience is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an at least solve one of the technical problem who exists among the prior art, provide an audio frequency processing circuit, the interference killing feature is strong, has guaranteed the quality of audio frequency greatly, has strengthened user experience.
The utility model provides an audio processing circuit, which comprises a main power supply module, an audio signal input module, a capacitor microphone core power supply module, a sound effect processing module, a gain amplification module, an electronic switch module, a main control module, a microphone opening and closing control module, a microphone waiting indication module and an audio output interface, wherein the audio signal input module is internally provided with the capacitor microphone core input interface, the capacitor microphone core power supply module is connected to the capacitor microphone core input interface, the audio signal input module is connected to the audio output interface through the gain amplification module and the electronic switch module in sequence, the sound effect processing module is also connected between the audio signal input module and the gain amplification module, the main control module is connected to the electronic switch module through the microphone opening and closing control module, and the main control module is also connected to the microphone waiting indication module, the main power supply module is simultaneously connected to the audio signal input module, the capacitance microphone power supply module, the sound effect processing module, the gain amplification module, the electronic switch module, the main control module, the microphone opening and closing control module and the microphone waiting indication module; the microphone core power supply module is internally provided with a noise reduction polar capacitor for reducing noise, the gain amplification module is internally provided with a differential amplifier for gain amplification and signal to noise ratio improvement, the electronic switch module is internally provided with an electronic switch which does not generate impact noise during action, the total power supply module is internally provided with a +12V voltage power supply unit, a-12V voltage power supply unit and a VCC5 voltage power supply unit which are used for avoiding mutual interference and are relatively independently arranged, and the +12V voltage power supply unit.
An audio processing circuit, electric capacity miaow core power module include fourth resistance, sixth resistance, seventh resistance, ninth electric capacity, fourteenth electric capacity and fall the polarity electric capacity of making an uproar, electric capacity miaow core input interface loops through the fourth resistance with sixth resistance is connected to +12V voltage power supply unit, electric capacity miaow core input interface still passes through ninth electric capacity is connected to fall the positive pole of the polarity electric capacity of making an uproar, fall the negative pole of the polarity electric capacity of making an uproar and be connected to ground, the one end of seventh resistance is connected to ground, the other end is connected to fall the positive pole of the polarity electric capacity of making an uproar and between fourth resistance and the sixth resistance, the one end of fourteenth electric capacity is connected to +12V voltage power supply unit, the other end is connected to ground.
An audio processing circuit, the gain amplification module include thirty-third electric capacity, twenty-eighth resistance and differential amplifier, differential amplifier's normal phase input is connected to ground, and the inverting input is connected to audio processing module, the output is connected to electronic switch module, the one end of thirty-third electric capacity is connected to differential amplifier's inverting input, the other end is connected to differential amplifier's output, twenty-eighth resistance is parallelly connected the both ends of thirty-third electric capacity.
The utility model discloses an audio processing circuit, the +12V voltage supply unit includes forty ninth resistance, fifty first resistance, forty second electric capacity, forty sixth electric capacity, forty seventh electric capacity, + DC24V input port, +12V output port and first voltage regulating chip, the forty ninth resistance, fifty resistance and fifty first resistance set up after connecting in parallel each other between the input port of + DC24V and the input of first voltage regulating chip, the earthing terminal of first voltage regulating chip is connected to ground, forty second electric capacity is polarity electric capacity, forty second electric capacity sets up between the input of first voltage regulating chip and ground, the output of first voltage regulating chip is connected to the +12V output port, forty-six electric capacity is polarity electric capacity, forty-six electric capacity sets up between the output of first voltage regulating chip and ground, the forty-seven capacitor is connected in parallel at two ends of the forty-sixth capacitor.
The utility model discloses an audio processing circuit, the-12V voltage power supply unit includes fifty-two resistance, fifty-three resistance, fifty-four resistance, forty-first electric capacity, forty-five electric capacity, forty-eight electric capacity, -DC24V input port, -12V output port and second voltage regulating chip, fifty-two resistance, fifty-three resistance and fifty-four resistance set up after connecting in parallel each other between-DC 24V input port and the input of second voltage regulating chip, the earthing terminal of second voltage regulating chip is connected to ground, forty-first electric capacity is polarity electric capacity, forty-first electric capacity sets up between the input of second voltage regulating chip and ground, the output of second voltage regulating chip is connected to the-12V output port, forty-five electric capacity is polarity electric capacity, the forty-fifth capacitor is arranged between the output end of the second voltage regulating chip and the ground, and the forty-eight capacitor is connected to two ends of the forty-fifth capacitor in parallel.
The audio processing circuit according to the present invention, the VCC5 voltage power supply unit includes a first fuse, a second capacitor, a third capacitor, a fourth capacitor, a seventh capacitor, a fortieth capacitor, a forty-fourth capacitor, a second resistor, an eleventh resistor, a forty-eighth resistor, a fifty-fifth resistor, a fifty-seventh resistor, a fifty-eighth resistor, a second inductor, a first diode, a second diode, a voltage conversion chip, a VCC5 output port, and the + DC24V input port, the voltage conversion chip is provided with a SW pin, an EN pin, a COMP pin, an FB pin, a GND pin, a FREQ pin, a VIN pin, and a BST pin, the GND pin is connected to ground through the forty-eighth resistor, the pin is connected to ground through the first fuse, one end of the second capacitor is connected to the VIN pin, the other end of the conveyer belt EN pin is connected to the ground, one end of a fortieth capacitor is connected to the VIN pin, the other end of the conveyer belt EN pin is connected to the ground, an eleventh resistor is arranged between the VIN pin and the EN pin, the BST pin is connected to the SW pin through a third capacitor, the SW pin is connected to the VCC5 output port through a second inductor, the cathode of a first diode is connected to the SW pin, the anode of the first diode is connected to the ground, the forty-fourth capacitor, the seventh capacitor, the fourth capacitor and the second diode are connected in parallel, the cathode of the second diode is connected to the VCC5 output port, the anode of the second diode is connected to the ground, the conveyer belt EN pin is further connected to the ground through a fifty-five resistor, the COMP pin is connected to the ground through a forty-third capacitor and the second resistor, and the FB pin is connected to the, the FB pin is also connected to the forty-fourth capacitor through the fifty-seventh resistor.
The utility model discloses an audio processing circuit has following beneficial effect at least: the utility model provides an audio processing circuit, which comprises a total power supply module, an audio signal input module, a capacitor microphone power supply module, an audio processing module, a gain amplification module, an electronic switch module, a master control module, a microphone switching control module, a microphone waiting indication module and an audio output interface, wherein the audio signal input module is internally provided with the capacitor microphone input interface; the microphone core power supply module is internally provided with a noise reduction polar capacitor for reducing noise, the gain amplification module is internally provided with a differential amplifier for gain amplification and signal to noise ratio improvement, the electronic switch module is internally provided with an electronic switch which does not generate impact noise during action, the total power supply module is internally provided with a +12V voltage power supply unit, a-12V voltage power supply unit and a VCC5 voltage power supply unit which are used for avoiding mutual interference and are relatively independently arranged, and the +12V voltage power supply unit. The utility model discloses in come anti-interference through three structures, be respectively: the polarity electric capacity of making an uproar that falls in electric capacity miaow core power module can the noise reduction, and differential amplifier in the gain amplification module can carry out the gain and enlarge and improve the SNR, has set up the power supply mode of multiunit mutual noninterference in the total power module, consequently, the utility model discloses the interference killing feature is strong, has guaranteed the quality of audio frequency greatly, has strengthened user experience.
Drawings
The invention is further described with reference to the following figures and examples.
Fig. 1 is a circuit diagram of an audio processing circuit with respect to a main power supply module according to an embodiment of the present invention;
fig. 2 is a circuit diagram of an audio processing circuit according to an embodiment of the present invention, the audio processing circuit including an audio signal input module and a capacitor core power supply module;
fig. 3 is a circuit diagram of an audio processing circuit according to an embodiment of the present invention, with respect to a gain amplifying module;
fig. 4 is a circuit diagram of an audio processing circuit according to an embodiment of the present invention, with respect to an electronic switch module and an audio output interface;
fig. 5 is a circuit diagram of an audio processing circuit according to an embodiment of the present invention, with respect to a microphone switching control module;
fig. 6 is a circuit diagram of an audio processing circuit related to a sound effect processing module according to an embodiment of the present invention;
fig. 7 is a circuit diagram of an audio processing circuit according to an embodiment of the present invention, with respect to a main control module;
fig. 8 is a circuit diagram of an audio processing circuit related to a microphone wait indication module according to an embodiment of the present invention.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
Referring to fig. 1 to 8, an embodiment of the present invention provides an audio processing circuit, including a main power supply module 100, an audio signal input module 210, a capacitor core power supply module 220, a sound effect processing module 230, a gain amplification module 240, an electronic switch module 250, a main control module 270, a microphone on-off control module 280, a microphone waiting indication module 290 and an audio output interface 260, wherein the audio signal input module 210 is provided with a capacitor core input interface 211, the capacitor core power supply module 220 is connected to the capacitor core input interface 211, the audio signal input module 210 is connected to the audio output interface 260 through the gain amplification module 240 and the electronic switch module 250 in sequence, the sound effect processing module 230 is further connected between the audio signal input module 210 and the gain amplification module 240, the main control module 270 is connected to the electronic switch module 250 through the microphone on-off control module 280, the main control module 270 is further connected to a microphone waiting indication module 290, and the main power supply module 100 is simultaneously connected to the audio signal input module 210, the capacitor microphone power supply module 220, the sound effect processing module 230, the gain amplification module 240, the electronic switch module 250, the main control module 270, the microphone on-off control module 280 and the microphone waiting indication module 290; a noise reduction polarity capacitor C11 for reducing noise is arranged in the capacitor microphone power supply module 220, a differential amplifier U3B for gain amplification and improving the signal-to-noise ratio is arranged in the gain amplification module 240, an electronic switch (such as U10B and U10C) which does not generate impact noise during operation is arranged in the electronic switch module 250, a +12V voltage power supply unit 120, a-12V voltage power supply unit 110, a VCC5 voltage power supply unit 130, and a +12V voltage power supply unit 120 which are arranged relatively independently for avoiding mutual interference are arranged in the total power supply module 100.
The utility model discloses in come anti-interference through three structures, be respectively: the polarity electric capacity C11 of making an uproar falls in electric capacity miaow core power module 220 can the noise reduction, and differential amplifier U3B in the gain amplification module 240 can carry out the gain and enlarge and improve the SNR, has set up the power supply mode of multiunit mutual noninterference in total power module 100, consequently, the utility model discloses the interference killing feature is strong, has guaranteed the quality of audio frequency greatly, has strengthened user experience.
Based on the above embodiment, the utility model discloses another embodiment provides an audio processing circuit, electric capacity miaow core power module 220 includes fourth resistance R4, sixth resistance R6, seventh resistance R7, ninth electric capacity C9, fourteenth electric capacity C14 and noise reduction polarity electric capacity C11, electric capacity miaow core input interface 211 loops through fourth resistance R4 and sixth resistance R6 and is connected to +12V voltage power supply unit 120, electric capacity miaow core input interface 211 still is connected to the positive pole of noise reduction polarity electric capacity C11 through ninth electric capacity C9, the negative pole of noise reduction polarity electric capacity C11 is connected to ground, one end of seventh resistance R7 is connected to ground, the other end is connected to the positive pole of noise reduction polarity electric capacity C11 and between fourth resistance R4 and the sixth resistance R6, one end of fourteenth electric capacity C14 is connected to +12V voltage power supply unit 120, the other end is connected to ground.
Based on the above embodiment, the utility model discloses another embodiment provides an audio processing circuit, gain amplification module 240 includes thirty-third electric capacity C33, twenty-eighth resistance R28 and differential amplifier U3B, the non-inverting input of differential amplifier U3B is connected to ground, the inverting input is connected to audio processing module 230, the output is connected to electronic switch module 250, one end of thirty-third electric capacity C33 is connected to the inverting input of differential amplifier U3B, the other end is connected to the output of differential amplifier U3B, twenty-eighth resistance R28 is connected in parallel at the both ends of thirty-third electric capacity C33.
Based on the above embodiment, another embodiment of the present invention provides an audio processing circuit, wherein the +12V voltage supply unit 120 includes a forty-ninth resistor R49, a fifty-fifth resistor R50, a fifty-first resistor R51, a forty-second capacitor C42, a forty-sixth capacitor C46, a forty-seventh capacitor C47, a + DC24V input port, a +12V output port, and a first voltage regulating chip J7, the forty-ninth resistor R49, the fifty-fifth resistor R50, and the fifty-first resistor R51 are connected in parallel to each other and disposed between the + DC24V input port and the input terminal of the first voltage regulating chip J7, the ground terminal of the first voltage regulating chip J7 is connected to ground, the forty-second capacitor C42 is a polar capacitor, the forty-second capacitor C42 is disposed between the input terminal of the first voltage regulating chip J7 and ground, the output terminal of the first voltage regulating chip J7 is connected to the +12V output port, the forty-sixth capacitor C46 is a polar capacitor, and the ground terminal of the first voltage regulating chip 7, forty-seven capacitors are connected in parallel across the forty-sixth capacitor C46.
Based on the above embodiment, another embodiment of the present invention provides an audio processing circuit, wherein the 12V voltage supply unit 110 includes a fifty-second resistor R52, a fifty-third resistor R53, a fifty-fourth resistor R54, a forty-first capacitor C41, a forty-fifth capacitor C45, a forty-eighth capacitor C48, an input port of a DC24V, an output port of 12V, and a second voltage regulating chip J6, the fifty-second resistor R52, the fifty-third resistor R53, and the fifty-fourth resistor R54 are connected in parallel to each other and disposed between the input port of the-DC 24V and the input port of the second voltage regulating chip J6, the ground terminal of the second voltage regulating chip J6 is connected to ground, the forty-first capacitor C41 is a polar capacitor, the forty-first capacitor C41 is disposed between the input terminal of the second voltage regulating chip J6 and ground, the output terminal of the second voltage regulating chip J6 is connected to the-12V output port, the forty-fifth capacitor is a polar capacitor, the forty-fifth capacitor C45 is arranged between the output end of the second voltage regulating chip J6 and the ground, and the forty-eight capacitor is connected in parallel to the two ends of the forty-fifth capacitor C45.
Based on the above embodiments, another embodiment of the present invention provides an audio processing circuit, wherein the VCC5 voltage supply unit 130 includes a first fuse F1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a seventh capacitor C7, a fortieth capacitor C40, a forty-third capacitor C43, a forty-fourth capacitor C44, a second resistor R2, an eleventh resistor R11, a forty-eighth resistor R48, a fifty-fifth resistor R55, a fifty-seventh resistor R57, a fifty-eighth resistor R58, a second inductor L2, a first diode D1, a second diode D2, a voltage conversion chip U5, a VCC 9 output port, and a + DC24V input port, the voltage conversion chip U5 is provided with a SW pin, a VIN pin, a COMP pin, a FB pin, a FREQ pin, a GND pin, and a BST pin, the FREQ pin is connected to ground, the FREQ pin is connected to the eighteen ground through a first resistor 48, one end of a second capacitor C2 is connected to the VIN pin, the other end is connected to the ground, one end of a fortieth capacitor C40 is connected to the VIN pin, the other end is connected to the ground, an eleventh resistor R11 is arranged between the VIN pin and the EN pin, the BST pin is connected to the SW pin through a third capacitor C3, the SW pin is connected to the VCC5 output port through a second inductor L2, the cathode of a first diode D1 is connected to the SW pin, the anode is connected to the ground, a fortieth capacitor C44 and a seventh capacitor C7, the fourth capacitor C4 and the second diode D2 are connected in parallel with each other, the cathode of the second diode D2 is connected to the output port of VCC5, the anode is connected to ground, the pin EN of the conveyor belt is further connected to ground through a fifteenth resistor R55, the pin COMP is connected to ground through a forty-thirteen capacitor C43 and a second resistor R2, the pin FB is connected to ground through a fifty-eighteen resistor R58, and the pin FB is further connected to a forty-fourth capacitor C44 through a fifty-seventeenth resistor R57. In this embodiment, in order to supply power to the main control module 270, the VCC5 output port may be connected to the voltage regulator so as to output 3V to supply power to the main control module 270. In this embodiment, the SW pin is a schottky diode grounded, and the diode must be close to the SW pin to reduce the switching spike. The EN pin is an enable input, pulling the pin below a specified threshold turns off the chip. The COMP pin is the compensation pin, which is the output of the error amplifier and to which the control loop frequency compensation is applied. The FB pin is a resistor divider arrangement that can reduce VOUT to equal the internal +0.8V reference. The GND pin is used for ground and it should be connected to the Exposed as close as possible to the output capacitor to shorten the high current switching path. The FREQ pin is used as the input of a switching frequency program, and a resistor is connected between the FREQ pin and the ground so as to set the switching frequency. The VIN pin is the regulator and the high side switch, and a decoupling ground capacitor must be placed close to this pin to minimize switching spikes. This is the positive supply of the internal floating high side MOSFET driver, with a bypass capacitor connected between this pin and the SW pin.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (6)
1. An audio processing circuit, characterized by: including total power module, audio signal input module, electric capacity miaow core power module, audio processing module, gain amplification module, electronic switch module, host system, microphone switching control module, microphone wait to indicate module and audio output interface, be provided with electric capacity miaow core input interface in the audio signal input module, electric capacity miaow core power module is connected to electric capacity miaow core input interface, audio signal input module loops through gain amplification module with electronic switch module is connected to audio output interface, audio signal input module with still be connected with between the gain amplification module audio processing module, host system passes through microphone switching control module is connected to electronic switch module, host system still is connected to microphone waits to indicate module, total power module is connected to simultaneously audio signal input module, audio signal input module, The microphone comprises a capacitor microphone core power supply module, a sound effect processing module, a gain amplification module, an electronic switch module, a main control module, a microphone opening and closing control module and a microphone waiting indication module; the microphone core power supply module is internally provided with a noise reduction polar capacitor for reducing noise, the gain amplification module is internally provided with a differential amplifier for gain amplification and signal to noise ratio improvement, the electronic switch module is internally provided with an electronic switch which does not generate impact noise during action, the total power supply module is internally provided with a +12V voltage power supply unit, a-12V voltage power supply unit and a VCC5 voltage power supply unit which are used for avoiding mutual interference and are relatively independently arranged, and the +12V voltage power supply unit.
2. The audio processing circuit of claim 1, wherein: the capacitor microphone core power supply module comprises a fourth resistor, a sixth resistor, a seventh resistor, a ninth capacitor, a fourteenth capacitor and a noise reduction polarity capacitor, wherein a capacitor microphone core input interface is sequentially connected to the +12V voltage power supply unit through the fourth resistor and the sixth resistor, the capacitor microphone core input interface is further connected to the anode of the noise reduction polarity capacitor through the ninth capacitor, the cathode of the noise reduction polarity capacitor is connected to the ground, one end of the seventh resistor is connected to the ground, the other end of the seventh resistor is connected to the anode of the noise reduction polarity capacitor and between the fourth resistor and the sixth resistor, one end of the fourteenth capacitor is connected to the +12V voltage power supply unit, and the other end of the fourteenth capacitor is connected to the ground.
3. The audio processing circuit of claim 1, wherein: the gain amplification module comprises a thirty-third capacitor, a twenty-eighth resistor and the differential amplifier, wherein a positive phase input end of the differential amplifier is connected to the ground, a negative phase input end of the differential amplifier is connected to the sound effect processing module, an output end of the differential amplifier is connected to the electronic switch module, one end of the thirty-third capacitor is connected to the negative phase input end of the differential amplifier, the other end of the thirty-third capacitor is connected to the output end of the differential amplifier, and the twenty-eighth resistor is connected to two ends of the thirty-third capacitor in parallel.
4. The audio processing circuit of claim 1, wherein: the +12V voltage power supply unit comprises a forty-ninth resistor, a fifty-fifth resistor, a fifty-first resistor, a forty-second capacitor, a forty-sixth capacitor, a forty-seventh capacitor, a + DC24V input port, a +12V output port and a first voltage regulating chip, wherein the forty-ninth resistor, the fifty-fifth resistor and the fifty-first resistor are connected in parallel and then are arranged between the + DC24V input port and the input end of the first voltage regulating chip, the grounding end of the first voltage regulating chip is connected to the ground, the forty-second capacitor is a polar capacitor, the forty-second capacitor is arranged between the input end of the first voltage regulating chip and the ground, the output end of the first voltage regulating chip is connected to the +12V output port, the forty-sixteen capacitor is a polar capacitor, and the forty-sixth capacitor is arranged between the output end of the first voltage regulating chip and the ground, the forty-seven capacitor is connected in parallel at two ends of the forty-sixth capacitor.
5. The audio processing circuit of claim 1, wherein: the-12V voltage power supply unit comprises a fifty-second resistor, a fifty-third resistor, a fifty-fourth resistor, a forty-first capacitor, a forty-fifth capacitor, a forty-eighth capacitor, a DC24V input port, a 12V output port and a second voltage regulating chip, the fifty-second resistor, the fifty-third resistor and the fifty-fourth resistor are connected in parallel and then are arranged between the-DC 24V input port and the input end of the second voltage regulating chip, the grounding end of the second voltage regulating chip is connected to the ground, the forty-first capacitor is a polar capacitor, the forty-first capacitor is arranged between the input end of the second voltage regulating chip and the ground, the output end of the second voltage regulating chip is connected to the-12V output port, the forty-fifteen capacitor is a polar capacitor, and the forty-fifth capacitor is arranged between the output end of the second voltage regulating chip and the ground, the forty-eight capacitor is connected in parallel to two ends of the forty-fifth capacitor.
6. The audio processing circuit of claim 4, wherein: the VCC5 voltage power supply unit comprises a first fuse, a second capacitor, a third capacitor, a fourth capacitor, a seventh capacitor, a fortieth capacitor, a forty-third capacitor, a forty-fourth capacitor, a second resistor, an eleventh resistor, a forty-eighth resistor, a fifty-fifth resistor, a fifty-seventh resistor, a fifty-eighth resistor, a second inductor, a first diode, a second diode, a voltage conversion chip, a VCC5 output port and the + DC24V input port, wherein the voltage conversion chip is provided with a SW pin, an EN pin, a COMP pin, an FB pin, a GND pin, a FREQ pin, a VIN pin and a BST pin, the GND pin is connected to ground, the FREQ pin is connected to ground through the forty-eighth resistor, the VIN pin is connected to ground through the first fuse, one end of the second capacitor is connected to the pin, the other end of the second capacitor is connected to ground, one end of the forty-fourth capacitor is connected to the VIN pin, the other end of the eleventh resistor is connected to the ground, the eleventh resistor is arranged between the VIN pin and the EN pin, the BST pin is connected to the SW pin through the third capacitor, the SW pin is connected to the VCC5 output port through the second inductor, the cathode of the first diode is connected to the SW pin, the anode of the first diode is connected to the ground, the forty-fourth capacitor, the seventh capacitor, the fourth capacitor and the second diode are connected in parallel, the cathode of the second diode is connected to the output port of the VCC5, the anode of the second diode is connected to the ground, the pin of the conveying belt EN is also connected to the ground through the fifty-fifth resistor, the COMP pin is connected to the ground through the forty-third capacitor and the second resistor, the FB pin is connected to the ground through the fifty-eighth resistor, and the FB pin is further connected to the forty-fourth capacitor through the fifty-seventh resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921467909.2U CN210225732U (en) | 2019-09-03 | 2019-09-03 | Audio processing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921467909.2U CN210225732U (en) | 2019-09-03 | 2019-09-03 | Audio processing circuit |
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| Publication Number | Publication Date |
|---|---|
| CN210225732U true CN210225732U (en) | 2020-03-31 |
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| CN201921467909.2U Active CN210225732U (en) | 2019-09-03 | 2019-09-03 | Audio processing circuit |
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| CN (1) | CN210225732U (en) |
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- 2019-09-03 CN CN201921467909.2U patent/CN210225732U/en active Active
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