Earphone compatible system and audio processing equipment

Abstract

The utility model relates to an earphone compatible system and audio processing equipment, the earphone compatible system comprises an audio processor, a switching circuit, a signal generation circuit, an earphone interface and a controller, the audio input end of the audio processor is respectively and electrically connected with the output end of the signal generation circuit and the microphone end of the switching circuit; and the controller is electrically connected with the control end of the signal generation circuit and is also electrically connected with the audio processor. When the audio processor is powered on, the controller controls the signal generation circuit to send a reference level signal to the microphone end of the switching circuit, when power-on is finished, the controller controls the signal generation circuit to stop sending the reference level signal, and meanwhile, the audio processor continues to send the reference level signal to the microphone end of the switching circuit. The earphone compatible system can eliminate POP sound generated by switching of the switching circuit when the audio processor is powered on, and the stability of the system is improved.

Description

Technical Field

[0001] This utility model relates to the field of headphone compatibility, and in particular to a headphone compatibility system and audio processing device. Background Technology

[0002] The audio processor can employ a switching circuit to ensure compatibility with different types of headphone plugs, expanding the range of headphone compatibility. During power-up, the switching circuit repeatedly checks or switches to ensure that different types of headphones can be used with the audio processor. However, during this repeated checking or switching process, a brief "pop" or "snap" sound is generated. This pop sound can interfere with other normal audio signal processing, affecting sound quality and even damaging the audio processor, making the system unstable. Utility Model Content

[0003] The present invention aims to provide a headphone-compatible system and audio processing device that can eliminate the pop sound generated during switching circuit switching when the audio processor is powered on, thereby improving system stability.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solutions:

[0005] In a first aspect, this utility model provides a headphone-compatible system, including: an audio processor, a switching circuit, a signal generation circuit, a headphone jack, and a controller;

[0006] The audio input terminal of the audio processor is electrically connected to the output terminal of the signal generation circuit and the microphone terminal of the switching circuit, respectively, and the controller is electrically connected to the control terminal of the signal generation circuit.

[0007] The switching circuit is used to respond to the insertion of headphones into the headphone jack and control the audio input terminal to be electrically connected to the microphone pin of the headphones via the microphone terminal of the switching circuit;

[0008] The controller is also electrically connected to the audio processor. The controller is used to output a first control signal to the signal generation circuit when the audio processor is powered on, and to output a second control signal to the signal generation circuit when the audio processor is powered off.

[0009] The signal generation circuit is used to send a reference level signal to the microphone end of the switching circuit in response to the input of the first control signal, and is also used to stop sending the reference level signal in response to the input of the second control signal. The audio processor is used to send the reference level signal to the microphone end of the switching circuit after power-on.

[0010] In some embodiments, the signal generation circuit includes a trigger unit and a first switching unit;

[0011] The trigger unit is electrically connected to the first power supply and the controller respectively. The trigger unit is also electrically connected to the control terminal of the first switch unit at the first node. The trigger unit is used to send a first trigger signal to the first switch unit in response to the input of the first control signal, and is also used to send a second trigger signal to the first switch unit in response to the input of the second control signal.

[0012] The first switching unit is also electrically connected to the second power supply and the microphone terminal of the switching circuit, respectively. The first switching unit is used to establish an electrical connection between the second power supply and the microphone terminal of the switching circuit in response to the input of the first trigger signal, so as to send the reference level signal to the microphone terminal of the switching circuit. It is also used to disconnect the electrical connection between the second power supply and the microphone terminal of the switching circuit in response to the input of the second trigger signal.

[0013] In some embodiments, the triggering unit includes a second switching unit and a voltage divider unit;

[0014] The control terminal of the second switching unit is electrically connected to the controller, the first terminal of the second switching unit is electrically connected to the voltage divider terminal of the voltage divider unit and the control terminal of the first switching unit at the first node, the second terminal of the second switching unit is grounded, and the voltage divider unit is also connected to the first power supply and ground.

[0015] The second switching unit is used to respond to the input of the first control signal and be in the off state so that the voltage divider unit generates the first trigger signal at the first node. It is also used to respond to the input of the second control signal and be in the on state to establish an electrical connection between the first node and ground so as to generate the second trigger signal at the first node.

[0016] In some embodiments, the first switching unit includes a first resistor and a first MOSFET;

[0017] One end of the first resistor is electrically connected to the microphone terminal of the switching circuit, the other end of the first resistor is connected to the drain of the first MOS transistor, the source of the first MOS transistor is connected to the second power supply, and the gate of the first MOS transistor is electrically connected to the first node.

[0018] In some embodiments, the second switching unit includes a second resistor and a second MOSFET;

[0019] One end of the second resistor is electrically connected to the controller, the other end of the second resistor is connected to the gate of the second MOS transistor, the source of the second MOS transistor is grounded, and the drain of the second MOS transistor is electrically connected to the first node.

[0020] In some embodiments, the voltage divider unit includes a third resistor and a fourth resistor. One end of the third resistor is electrically connected to the first power supply, the other end of the first resistor and one end of the second resistor are electrically connected to the first node, and the other end of the second resistor is grounded.

[0021] In some embodiments, the triggering unit further includes a filtering unit, which is electrically connected to the control terminals of the controller and the second switching unit, respectively, and is used to filter the first control signal or the second control signal.

[0022] In some embodiments, the filtering unit includes a filtering capacitor, one end of which is electrically connected to the control terminals of the controller and the second switching unit, and the other end of which is grounded.

[0023] In some embodiments, the microphone end of the switching circuit is electrically connected to the audio input end of the audio processor and the output end of the signal generation circuit, respectively.

[0024] The switching circuit is used to maintain the electrical connection between the microphone end of the switching circuit and the first end of the switching circuit in response to the insertion of a CT IA standard headset into the audio processor, and is also used to activate the switching circuit in response to the insertion of an OMTP standard headset into the audio processor to establish an electrical connection between the microphone end of the switching circuit and the second end of the switching circuit.

[0025] In a second aspect, embodiments of the present invention provide an audio processing device, the audio processing device including the headphone-compatible system described above.

[0026] In various embodiments of this utility model, the headphone compatibility system includes an audio processor, a switching circuit, a signal generation circuit, a headphone jack, and a controller. The audio input terminal of the audio processor is electrically connected to the output terminal of the signal generation circuit and the microphone terminal of the switching circuit, respectively. The controller is electrically connected to the control terminal of the signal generation circuit and also electrically connected to the audio processor. When headphones are plugged into the headphone jack, the switching circuit controls the audio input terminal to be electrically connected to the microphone pin of the headphones via the microphone terminal of the switching circuit, so as to be compatible with different types of headphones. When the audio processor is powered on, the controller outputs a first control signal to the signal generation circuit. In response to the input of the first control signal, the signal generation circuit sends a reference level signal to the microphone terminal of the switching circuit. When the audio processor is powered on and off, the controller outputs a second control signal to the signal generation circuit. In response to the input of the second control signal, the signal generation circuit stops sending the reference level signal, while the audio processor continues to send the reference level signal to the microphone terminal of the switching circuit. Therefore, this headphone compatibility system can be compatible with different types of headphone plugs. When the audio processor is powered on, the signal generation circuit sends a reference level signal to the microphone of the switching circuit to eliminate the pop sound generated by the switching circuit when switching on, ensuring that a stable and clear voice signal can be obtained when switching between different types of headphones, thus improving the stability of the system. Attached Figure Description

[0027] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0028] Figure 1 This is a schematic diagram of the structure of one of the headphone compatibility systems provided in this embodiment of the utility model;

[0029] Figure 2 This is a schematic diagram of the structure of one of the headphone compatibility systems provided in this embodiment of the utility model;

[0030] Figure 3 This is a schematic diagram of the circuit structure of one of the headphone compatibility systems provided in this utility model embodiment. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model.

[0032] Please see Figure 1 , Figure 1This is a schematic diagram of the structure of a headphone compatibility system provided in an embodiment of the present invention. The headphone compatibility system 100 includes an audio processor 10, a switching circuit 20, and a headphone interface 50. The audio input terminal of the audio processor 10 is electrically connected to the microphone terminal of the switching circuit 20.

[0033] Headphones are divided into 3-segment headphones and 4-segment headphones. 3-segment headphones do not have a microphone function, while 4-segment headphones do have a microphone function. 4-segment headphones have two standards: OMTP standard and CT IA standard. OMTP standard headphones have the following order from top to bottom: left channel, right channel, microphone, and ground. CT IA standard headphones have the following order: left channel, right channel, ground, and microphone.

[0034] Therefore, when different types of headphones are plugged into the headphone jack 50, the switching circuit 20 controls the audio input terminal to be electrically connected to the microphone pin of the headphone via the microphone terminal of the switching circuit 20, so as to ensure compatibility with different types of headphones. The switching circuit 20 ensures that the microphone pin of the headphone is connected to the audio input terminal of the audio processor 10, and simultaneously connects the ground pin of the headphone to the ground terminal of the audio processor 10, ensuring that different types of headphones can be used normally on the audio processor 10, thereby achieving compatibility between different types of headphones.

[0035] Specifically, the microphone end of the switching circuit 20 is electrically connected to the audio input end of the audio processor 10.

[0036] If a CTIA standard headset is inserted into the headphone jack 50, the switching circuit 20 detects that the level of its first terminal is high, thus determining that the inserted headset is a CTIA standard headset, and the first terminal of the switching circuit 20 is connected to the microphone pin of the headset. Then, the switching circuit 20 does not need to operate; its first terminal remains connected to the microphone pin of the headset, its second terminal is connected to the ground pin of the headset, and its first terminal continues to be electrically connected to its microphone terminal. This ensures that the audio input terminal of the audio processor 10 remains connected to the microphone pin of the headset via the microphone terminal of the switching circuit 20 and the first terminal of the switching circuit 20.

[0037] If an OMTP-compliant headset is inserted into the audio processor 10, the switching circuit 20 detects that the level of its first terminal is low, thus determining that the inserted headset is an OMTP-compliant headset. The first terminal of the switching circuit 20 is connected to the headset's ground pin, and the second terminal is connected to the headset's microphone pin. When the switching circuit 20 is activated, it switches the connection, establishing a connection between its microphone terminal and its second terminal. This allows the input terminal of the audio processor 10 to be connected to the headset's microphone pin via the microphone terminal and the second terminal of the switching circuit 20.

[0038] If a 3-segment headphone is inserted into the audio processor 10, the switching circuit 20 detects that both the first and second terminals of the switching circuit 20 are low-level signals. This indicates that a 3-segment headphone has no microphone function. The microphone terminal of the switching circuit 20 is then connected to either the first or second terminal of the switching circuit 20, and the audio input terminal of the audio processor 10 becomes low-level.

[0039] Therefore, the switching circuit 20 can automatically identify the type of headphones and automatically switch according to the type of headphones to establish a connection between the audio input terminal of the audio processor 10 and the microphone pin of the headphones, so that the audio processor 10 can be compatible with different types of headphones.

[0040] In some embodiments, the switching circuit 20 includes devices with switching functions such as analog switch chips, double-pole double-throw switches, or relays. For example, the switching circuit 20 includes an SGM2549D, which is an analog switch chip containing multiple analog switches. Pin 4 of the SGM2549D is the first terminal of the switching circuit 20, and pin 6 of the SGM2549D is the second terminal of the switching circuit 20. When different types of headphones are plugged into the headphone jack 50, the SGM2549D will select the corresponding switch to close, thereby establishing a connection between the audio input terminal of the audio processor 10 and the microphone pin of the headphones via the SGM2549D.

[0041] During power-up, the switching circuit 20 repeatedly checks the voltage levels of its first and second terminals to determine the type of headphones inserted, ensuring that the audio input of the audio processor 10 is connected to the microphone pin of the headphones. However, during this repeated checking or switching process, a pop sound may occur. A pop sound is a brief, "pop" or "snap" sound that appears in the speaker or headphones. This pop sound can interfere with other normal audio signal processing, affect sound quality, and even damage the audio processor 10, making the system unstable.

[0042] Based on the above issues, please continue reading Figure 1This utility model embodiment provides a headphone compatible system 100, which includes an audio processor 10, a switching circuit 20, and a headphone jack 50, as well as a signal generation circuit 30 and a controller 40. The output terminal of the signal generation circuit 30 is electrically connected to the microphone terminal of the switching circuit 20, and the control terminal of the signal generation circuit 30 is electrically connected to the controller 40.

[0043] When the audio processor 10 is powered on, the controller 40 outputs a first control signal to the signal generation circuit 30. In response to the input of the first control signal, the signal generation circuit 30 sends a reference level signal to the microphone end of the switching circuit 20. When the audio processor 10 is powered on and off, the controller 40 outputs a second control signal to the signal generation circuit 30. In response to the input of the second control signal, the signal generation circuit 30 stops sending the reference level signal. At the same time, the audio processor 10 continues to send the reference level signal to the microphone end of the switching circuit.

[0044] The voltage of the reference level signal can be set as needed. It provides a suitable bias voltage to the audio input of the audio processor 10, typically between 1V and 3V, with around 2.5V being common. When sound is applied to the microphone of the headphones, the microphone generates an AC signal, which is superimposed on the reference level. This signal is then processed and analyzed by the audio processor 10.

[0045] When the audio processor 10 is first powered on, the signal generation circuit 30 provides the reference level signal. When the audio processor 10 is powered on and the power-on process ends, the signal generation circuit 30 stops providing the reference level signal, and the audio processor 10 continues to provide the reference level signal.

[0046] By providing a stable reference level, the audio processor 10 can better adapt to the microphone signals of different standard headphones, ensuring a stable and clear voice signal when switching between different standard headphones.

[0047] Controller 40 can be a general-purpose processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA), microcontroller, ARM (Acorn RISC Machine) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination of these components. Furthermore, controller 40 can also be any conventional processor, controller, microcontroller, or state machine. Controller 40 can also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors combined with a DSP, and / or any other such configuration.

[0048] In some embodiments, the switching circuit 20 and the controller 40 may be integrated with the audio processor 10 into an audio processing device and packaged into an audio processor chip.

[0049] Therefore, this headphone compatibility system can be compatible with different types of headphone plugs. When the audio processor is powered on, the signal generation circuit sends a reference level signal to the microphone of the switching circuit to eliminate the pop sound generated by the switching circuit when switching on, ensuring that a stable and clear voice signal can be obtained when switching between different types of headphones, thus improving the stability of the system.

[0050] Please see Figure 2 , Figure 2 This is a schematic diagram of a signal generation circuit provided in an embodiment of the present invention, as shown below. Figure 2 As shown, the signal generation circuit 30 includes a first switching unit 31 and a triggering unit 32. The triggering unit 32 is electrically connected to the first power supply VCC1 and the controller 40, respectively. The triggering unit 32 is also electrically connected to the control terminal of the first switching unit 31 at the first node a. The first switching unit 31 is also electrically connected to the second power supply VCC2 and the microphone terminal of the switching circuit 20, respectively.

[0051] When the audio processor 10 is powered on, the controller 40 detects that the audio processor 10 is in the power-on stage and sends a first control signal to the trigger unit 32. This causes the trigger unit 32 to send a first trigger signal to the first switching unit 31. The first switching unit 31 responds to the input of the first trigger signal and establishes an electrical connection between the second power supply VCC2 and the microphone terminal of the switching circuit 20, thereby sending a reference level signal to the microphone terminal of the switching circuit 20. The voltage of the reference level signal is equal to the voltage of the first power supply VCC1, or equal to the voltage of the first power supply VCC1 minus the on-state voltage drop of the first switching unit 31.

[0052] When the audio processor 10 finishes powering on, the controller 40 detects that the audio processor 10 has finished powering on and sends a second control signal to the trigger unit 32, causing the trigger unit 32 to send a second trigger signal to the first switch unit 31. The first switch unit 31 responds to the input of the second trigger signal, disconnects the electrical connection between the second power supply VCC2 and the microphone end of the switching circuit 20, and stops sending the reference level signal to the microphone end of the switching circuit 20. The audio processor 10 then continues to send the reference level signal to the microphone end of the switching circuit 20.

[0053] In some embodiments, please continue reading Figure 2The triggering unit 32 includes a second switching unit 321 and a voltage divider unit 322. The control terminal of the second switching unit 321 is electrically connected to the controller 40. The first terminal of the second switching unit 321, the voltage divider terminal of the voltage divider unit 322, and the control terminal of the first switching unit 31 are electrically connected to the first node a. The second terminal of the second switching unit 321 is grounded to GND. The voltage divider unit 322 is also electrically connected to the first power supply VCC1 and ground GND.

[0054] When the audio processor 10 is powered on, the controller 40 sends a first control signal to the second switching unit 321. The second switching unit 321 is in the off state, and the voltage divider unit 322 divides the second power supply VCC2 to generate a voltage divider signal at the first node a. The voltage divider signal is the first trigger signal. The first trigger signal causes the first switching unit 31 to establish an electrical connection between the second power supply VCC2 and the microphone end of the switching circuit 20, so as to send a reference level signal to the microphone end of the switching circuit 20.

[0055] After the audio processor 10 is powered on, the controller 40 sends a second control signal to the second switching unit 321. The second switching unit 321 is in a conducting state, establishing an electrical connection between the first node a and ground GND. The potential at the first node a is pulled low to generate a low-level second trigger signal at the first node a. The second trigger signal causes the first switching unit 31 to disconnect the electrical connection between the second power supply VCC2 and the microphone end of the switching circuit 20, thereby stopping the transmission of the reference level signal to the microphone end of the switching circuit 20.

[0056] In some embodiments, please continue reading Figure 2 The triggering unit 32 also includes a filtering unit 33, which is electrically connected to the control terminals of the controller 40 and the second switching unit 321 respectively. The filtering unit 33 filters the first control signal or the second control signal, and the filtered first control signal or the filtered second control signal is then applied to the control terminal of the second switching unit 321 to control the second switching unit 321 to be turned on or off.

[0057] Please see Figure 3 , Figure 3 This is a schematic diagram of the circuit structure of a signal generation circuit provided in an embodiment of the present invention, as shown below. Figure 3 As shown, the first switching unit 31 includes a first resistor R1 and a first MOSFET Q1. One end of the first resistor R1 is electrically connected to the microphone end of the switching circuit 20, and the other end of the first resistor R1 is connected to the drain of the first MOSFET Q1. The source of the first MOSFET Q1 is connected to the second power supply VCC2, and the gate of the first MOSFET Q1 is electrically connected to the first node a.

[0058] The second switching unit 321 includes a second resistor R2 and a second MOSFET Q2. One end of the second resistor R2 is electrically connected to the controller 40, and the other end of the second resistor R2 is connected to the gate of the second MOSFET Q2. The source of the second MOSFET Q2 is grounded to GND, and the drain of the second MOSFET Q2 is electrically connected to the first node a.

[0059] The voltage divider unit 322 includes a third resistor R3 and a fourth resistor R4. One end of the third resistor R3 is electrically connected to the first power supply VCC1, and the other end of the first resistor R1 is electrically connected to one end of the second resistor R2 at the first node a. The other end of the second resistor R2 is grounded to GND.

[0060] The filter unit 33 includes a filter capacitor C. One end of the filter capacitor C is electrically connected to the control terminal of the controller 40 and the second switching unit 321, respectively. Specifically, one end of the filter capacitor C is connected to the gate of the controller 40 and the second MOS transistor Q2, respectively, and the other end of the filter capacitor C is grounded to GND.

[0061] It should be noted that the voltages of the first power supply VCC1 and the second power supply VCC2 can be set as needed, with the voltage of the first power supply VCC1 being greater than the voltage of the second power supply VCC2. In this embodiment, the voltage of the first power supply VCC1 is +12V, and the voltage of the second power supply VCC2 is +3.3V.

[0062] Combination Figure 3 The working principle of the signal generation circuit 30 can be described as follows:

[0063] When the audio processor 10 is powered on, the controller 40 sends a low-level first control signal to the second MOSFET Q2, the second MOSFET Q2 is turned off, the first power supply VCC1 is divided by the third resistor R3 and the fourth resistor R4, and a voltage divider signal is generated at the first node a. The voltage divider signal acts as the first trigger signal on the gate of the first MOSFET Q1, the first MOSFET Q1 is turned on, and the electrical connection between the second power supply VCC2 and the microphone end of the switching circuit 20 is established, so as to send a reference level signal to the microphone end of the switching circuit 20. The voltage of the reference level signal is the voltage of the second power supply VCC2, or the voltage of the second power supply VCC2 minus the on-state voltage drop of the first MOSFET Q1.

[0064] After the audio processor 10 is powered on, the controller 40 sends a high-level second control signal to the second MOSFET Q2, turning on the second MOSFET Q2 and connecting the electrical connection between the first node a and ground GND. This pulls down the potential of the first node a, sending a low-level second trigger signal to the first MOSFET Q1. The voltage of the second trigger signal is zero, turning off the first MOSFET Q1 and disconnecting the electrical connection between the second power supply VCC2 and the microphone terminal of the switching circuit 20. This stops sending the reference level signal to the microphone terminal of the switching circuit 20, and the audio processor 10 continues to send the reference level signal to the microphone terminal of the switching circuit 20.

[0065] In summary, this headphone compatibility system is compatible with different types of headphone plugs. When the audio processor is powered on, the signal generation circuit sends a reference level signal to the microphone end of the switching circuit to eliminate the pop sound generated when the switching circuit switches on, ensuring a stable and clear voice signal when switching between different types of headphones, thus improving the system's stability.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; under the concept of this utility model, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of this utility model as described above, which are not provided in detail for the sake of brevity; although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A headset compatible system, characterized by, include: Audio processor, switching circuit, signal generation circuit, headphone jack, and controller; The audio input terminal of the audio processor is electrically connected to the output terminal of the signal generation circuit and the microphone terminal of the switching circuit, respectively, and the controller is electrically connected to the control terminal of the signal generation circuit. The switching circuit is used to respond to the insertion of headphones into the headphone jack and control the audio input terminal to be electrically connected to the microphone pin of the headphones via the microphone terminal of the switching circuit; The controller is also electrically connected to the audio processor. The controller is used to output a first control signal to the signal generation circuit when the audio processor is powered on, and to output a second control signal to the signal generation circuit when the audio processor is powered off. The signal generation circuit is used to send a reference level signal to the microphone end of the switching circuit in response to the input of the first control signal, and is also used to stop sending the reference level signal in response to the input of the second control signal. The audio processor is used to send the reference level signal to the microphone end of the switching circuit after power-on.

2. The headphone-compatible system of claim 1, wherein, The signal generation circuit includes a trigger unit and a first switching unit; The trigger unit is electrically connected to the first power supply and the controller respectively. The trigger unit is also electrically connected to the control terminal of the first switch unit at the first node. The trigger unit is used to send a first trigger signal to the first switch unit in response to the input of the first control signal, and is also used to send a second trigger signal to the first switch unit in response to the input of the second control signal. The first switching unit is also electrically connected to the second power supply and the microphone terminal of the switching circuit, respectively. The first switching unit is used to establish an electrical connection between the second power supply and the microphone terminal of the switching circuit in response to the input of the first trigger signal, so as to send the reference level signal to the microphone terminal of the switching circuit. It is also used to disconnect the electrical connection between the second power supply and the microphone terminal of the switching circuit in response to the input of the second trigger signal.

3. The headphone-compatible system of claim 2, wherein, The triggering unit includes a second switching unit and a voltage divider unit; The control terminal of the second switching unit is electrically connected to the controller. The first terminal of the second switching unit is electrically connected to the voltage divider terminal of the voltage divider unit and the control terminal of the first switching unit at the first node. The second terminal of the second switching unit is grounded. The voltage divider unit is also connected to the first power supply and ground. The second switching unit is used to respond to the input of the first control signal and be in the off state so that the voltage divider unit generates the first trigger signal at the first node. It is also used to respond to the input of the second control signal and be in the on state to establish an electrical connection between the first node and ground so as to generate the second trigger signal at the first node.

4. The headphone-compatible system of claim 2, wherein, The first switching unit includes a first resistor and a first MOSFET; One end of the first resistor is electrically connected to the microphone terminal of the switching circuit, the other end of the first resistor is connected to the drain of the first MOS transistor, the source of the first MOS transistor is connected to the second power supply, and the gate of the first MOS transistor is electrically connected to the first node.

5. The headphone-compatible system of claim 3, wherein, The second switching unit includes a second resistor and a second MOSFET; One end of the second resistor is electrically connected to the controller, the other end of the second resistor is connected to the gate of the second MOS transistor, the source of the second MOS transistor is grounded, and the drain of the second MOS transistor is electrically connected to the first node.

6. The headphone-compatible system of claim 3, wherein, The voltage divider unit includes a third resistor and a fourth resistor. One end of the third resistor is electrically connected to the first power supply, and the other end of the third resistor and one end of the fourth resistor are electrically connected to the first node. The other end of the fourth resistor is grounded.

7. The headphone-compatible system of claim 3, wherein, The triggering unit further includes a filtering unit, which is electrically connected to the control terminals of the controller and the second switching unit, respectively. The filtering unit is used to filter the first control signal or the second control signal.

8. The headphone-compatible system of claim 7, wherein, The filtering unit includes a filtering capacitor, one end of which is electrically connected to the control terminals of the controller and the second switching unit, and the other end of which is grounded.

9. The headphone-compatible system of claim 1, wherein, The microphone end of the switching circuit is electrically connected to the audio input end of the audio processor and the output end of the signal generation circuit, respectively. The switching circuit is used to maintain the electrical connection between the microphone end of the switching circuit and the first end of the switching circuit in response to the insertion of a CTIA standard headset into the audio processor, and is also used to switch in response to the insertion of an OMTP standard headset into the audio processor to establish an electrical connection between the microphone end of the switching circuit and the second end of the switching circuit.

10. An audio processing device, characterized by The audio processing device includes a headphone-compatible system as described in any one of claims 1-9.

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