CN220896832U - Earphone control circuit and audio equipment - Google Patents
Earphone control circuit and audio equipment Download PDFInfo
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- CN220896832U CN220896832U CN202322515687.XU CN202322515687U CN220896832U CN 220896832 U CN220896832 U CN 220896832U CN 202322515687 U CN202322515687 U CN 202322515687U CN 220896832 U CN220896832 U CN 220896832U
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Abstract
The utility model discloses an earphone control circuit and audio equipment, which comprises a signal output circuit, an on-off circuit and an output circuit; the input end of the signal output circuit is connected with the control circuit and is used for outputting a first signal or a second signal according to the control signal of the control circuit; the input end of the on-off circuit is respectively connected with the audio circuit and the output end of the signal circuit, and is used for receiving the audio signal output by the audio circuit and switching on and off according to the first signal or the second signal; the input end of the output circuit is connected with the on-off circuit, and the output end of the output circuit is connected with the earphone; when the on-off circuit is conducted, the audio signal is output to the earphone through the output circuit. The utility model can avoid the noise generated by the earphone when the audio equipment is started or shut down, and improves the use experience of users.
Description
Technical Field
The present utility model relates to the field of audio processing technologies, and in particular, to an earphone control circuit and an audio device.
Background
Most of the current audio devices or display devices with audio output functions, when connected with the earphone, noise can appear in the earphone at the moment of starting or shutting down the device, so that the use experience of a user is reduced.
Disclosure of utility model
The utility model provides an earphone control circuit and audio equipment, which aim to solve the problems that when the traditional audio equipment is connected with an earphone, noise can occur to the earphone at the moment of starting up and shutting down, and the user experience is reduced.
In a first aspect, the present utility model provides an earphone control circuit, where the earphone control circuit includes a signal output circuit, an on-off circuit, and an output circuit; the input end of the signal output circuit is connected with the control circuit and is used for outputting a first signal or a second signal according to the control signal of the control circuit; the input end of the on-off circuit is respectively connected with the audio circuit and the output end of the signal output circuit, and is used for receiving the audio signal output by the audio circuit and is used for being turned on and off according to the first signal or the second signal; the input end of the output circuit is connected with the on-off circuit, and the output end of the output circuit is connected with the earphone; when the on-off circuit is conducted, the audio signal is output to the earphone through the output circuit.
Further, the signal output circuit comprises a first triode, a second triode and a first capacitor; the base electrode of the first triode is connected with the control circuit, the collector electrode of the first triode is connected with the input end of the on-off circuit, and the emitter electrode of the first triode is grounded; the base of the second triode is connected with a power supply, the collector of the second triode is connected with the control circuit, one end of the first capacitor is respectively connected with the power supply and the emitter of the second triode, and the other end of the first capacitor is grounded.
Further, the signal output circuit further comprises a first resistor, a second resistor, a third resistor and a first diode; one end of the first resistor is connected with the power supply, the other end of the first resistor is connected with one end of the second resistor and the positive electrode of the first diode respectively, the other end of the second resistor is connected with the base electrode of the first triode, the negative electrode of the first diode is connected with one end of the first capacitor and one end of the third resistor respectively, and the other end of the third resistor is grounded.
Further, the signal output circuit further comprises a fourth resistor, a fifth resistor, a sixth resistor and a second capacitor; one end of the fourth resistor is connected with an auxiliary power supply, the other end of the fourth resistor is connected with the control circuit, one end of the fifth resistor is connected with the control circuit, the other end of the fifth resistor is connected with the base electrode of the first triode, one end of the sixth resistor is connected with the auxiliary power supply, the other end of the sixth resistor is connected with the collector electrode of the first triode, one end of the second capacitor is connected with the collector electrode of the first triode, and the other end of the second capacitor is grounded.
Further, the on-off circuit comprises a first connecting circuit and a second connecting circuit, and the output circuit comprises a first output circuit and a second output circuit; the input end of the first connecting circuit and the input end of the second connecting circuit are connected with the audio circuit, the controlled end of the first connecting circuit and the controlled end of the second connecting circuit are connected with the output end of the signal output circuit, the output end of the first connecting circuit is connected with the input end of the first output circuit, the output end of the second connecting circuit is connected with the input end of the second output circuit, and the output end of the first output circuit and the output end of the second output circuit are connected with the earphone.
Further, the first connection circuit comprises a first field effect transistor, a second field effect transistor, a seventh resistor and a third capacitor; the grid electrode of the first field effect tube and the grid electrode of the second field effect tube are connected with the output end of the signal output circuit, the drain electrode of the first field effect tube, one end of the seventh resistor and one end of the third capacitor are connected with the audio circuit, the source electrode of the first field effect tube is connected with the source electrode of the second field effect tube, and the drain electrode of the second field effect tube is connected with the input end of the first output circuit.
Further, the second connection circuit comprises a third field effect transistor, a fourth field effect transistor, an eighth resistor and a fourth capacitor; the grid electrode of the third field effect tube and the grid electrode of the fourth field effect tube are connected with the output end of the signal output circuit, the drain electrode of the third field effect tube, one end of the second inductor, one end of the eighth resistor and one end of the fourth capacitor are connected with the audio circuit, the source electrode of the third field effect tube is connected with the source electrode of the fourth field effect tube, and the drain electrode of the fourth field effect tube is connected with the input end of the second output circuit.
Further, the first output circuit comprises a ninth resistor, a fifth capacitor and a sixth capacitor; one end of the fifth capacitor is connected with the output end of the first connecting circuit, the other end of the fifth capacitor is respectively connected with one end of the ninth resistor, one end of the sixth capacitor and the earphone, and the other end of the ninth resistor and the other end of the sixth capacitor are grounded.
Further, the second output circuit comprises a tenth resistor, a seventh capacitor and an eighth capacitor; one end of the seventh capacitor is connected with the output end of the second connecting circuit, the other end of the seventh capacitor is respectively connected with one end of the tenth resistor, one end of the eighth capacitor and the earphone, and the other end of the tenth resistor and the other end of the eighth capacitor are grounded.
In a second aspect, the present utility model also provides an audio device, which includes a control circuit, an audio circuit, and a signal output circuit as described in any one of the above; the control circuit and the audio circuit are both connected with the earphone control circuit.
According to the earphone control circuit and the audio device, the signal output circuit can output the first signal and the second signal according to the control signal of the control circuit, the on-off circuit is turned on and off according to the first signal and the second signal, when the on-off circuit is turned on, the audio signal can be normally output to the earphone, when the on-off circuit is turned off, the earphone cannot receive the audio signal, so that the on-off circuit is controlled to be turned off when the audio device is started, noise is avoided from being generated by the earphone, when the audio device is normally started, the on-off circuit is controlled to be turned on, the earphone can be normally used, and when the audio device is turned off, the on-off circuit is also controlled to be turned off, noise is avoided from being generated by the earphone, and the use experience of a user is improved.
Drawings
In order to more clearly illustrate the technical solutions of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a block diagram of an earphone control circuit according to an embodiment of the present utility model;
fig. 2 is a block diagram of an earphone control circuit according to another embodiment of the present utility model;
fig. 3 is a circuit diagram of a signal output circuit of an earphone control circuit according to an embodiment of the present utility model;
Fig. 4 is a circuit diagram of an on-off circuit of an earphone control circuit according to an embodiment of the present utility model; and
Fig. 5 is a circuit diagram of an output circuit of an earphone control circuit according to an embodiment of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the utility model are shown. 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.
It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
Referring to fig. 1 to 5, fig. 1 is a block schematic diagram of an earphone control circuit 10 according to an embodiment of the present utility model; fig. 2 is a block diagram of an earphone control circuit 10 according to another embodiment of the present utility model;
Fig. 3 is a circuit diagram of a signal output circuit 11 of the earphone control circuit 10 according to an embodiment of the present utility model; fig. 4 is a circuit diagram of the on-off circuit 12 of the earphone control circuit 10 according to an embodiment of the present utility model; fig. 5 is a circuit diagram of the output circuit 13 of the earphone control circuit 10 according to an embodiment of the present utility model. As shown in fig. 1, the earphone control circuit 10 provided by the utility model comprises a signal output circuit 11, an on-off circuit 12 and an output circuit 13; the input end of the signal output circuit 11 is connected with the control circuit 20 and is used for outputting a first signal or a second signal according to a control signal of the control circuit 20; the input end of the on-off circuit 12 is respectively connected with the output ends of the audio circuit 30 and the signal output circuit 11, and is used for receiving the audio signal output by the audio circuit 30 and is used for being turned on and off according to the first signal or the second signal; the input end of the output circuit 13 is connected with the on-off circuit 12, and the output end of the output circuit 13 is connected with the earphone 200; wherein, when the on-off circuit 12 is turned on, the audio signal is output to the earphone 200 through the output circuit 13.
Specifically, the input end of the signal output circuit 11 is connected to the control circuit 20, and the control circuit 20 may include a control chip, and the control chip may output a control signal to the signal output circuit 11, preferably, an IO pin of the control chip is connected to the input end of the signal output circuit 11, and the output control signal is a level signal. The signal output circuit 11 outputs a first signal or a second signal according to the control signal, and the first signal and the second signal may be level signals, preferably, the first signal is a low level signal and the second signal is a high level signal. One input end of the on-off circuit 12 is connected with the audio circuit 30, the other input end is connected with the output end of the signal output circuit 11, the on-off circuit is used for receiving the first signal and the second signal, and the output end of the on-off circuit 12 is connected with the output circuit 13. Preferably, the on-off circuit 12 is turned off when it receives a first level signal and turned off when it receives a second level signal. The input end of the output circuit 13 is connected with the output end of the on-off circuit 12, and the output end of the output circuit is connected with the earphone 200. When the audio device 100 is turned on, the control circuit 20 outputs a control signal to the signal output circuit 11, so that the signal output circuit 11 outputs a first signal to the on-off circuit 12, the on-off circuit 12 is turned off, an audio signal output by the audio circuit 30 cannot be output to the earphone 200, noise cannot be generated by the earphone 200, after the audio device 100 stably operates, the control circuit 20 outputs the control signal to the signal output circuit 11, so that the signal output circuit 11 outputs a second signal, the on-off circuit 12 is turned on, the output audio signal of the audio circuit 30 is output to the earphone 200 through the output circuit 13, and the earphone 200 normally receives the audio signal. When the audio device 100 is turned off, the on-off circuit 12 is turned off, the audio signal output by the audio circuit 30 cannot be output to the earphone 200, and the earphone 200 does not generate noise.
Referring to fig. 2, as a further embodiment, the signal output circuit 11 includes a first transistor Q1, a second transistor Q2, and a first capacitor C1; the base electrode of the first triode Q1 is connected with the control circuit 20, the collector electrode of the first triode Q1 is connected with the input end of the on-off circuit 12, and the emitter electrode of the first triode Q1 is grounded; the base of the second triode Q2 is connected with the power supply 40, the collector of the second triode Q2 is connected with the control circuit 20, one end of the first capacitor C1 is respectively connected with the power supply 40 and the emitter of the second triode Q2, and the other end of the first capacitor C1 is grounded.
Further, the signal output circuit 11 further includes a first resistor R1, a second resistor R2, a third resistor R3, and a first diode D1; one end of the first resistor R1 is connected with the power supply 40, the other end of the first resistor R1 is connected with one end of the second resistor R2 and the positive electrode of the first diode D1, the other end of the second resistor R2 is connected with the base electrode of the first triode Q1, the negative electrode of the first diode D1 is connected with one end of the first capacitor C1 and one end of the third resistor R3, and the other end of the third resistor R3 is grounded.
Further, the signal output circuit 11 further includes a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and a second capacitor C2; one end of the fourth resistor R4 is connected with the auxiliary power supply 50, the other end of the fourth resistor R4 is connected with the control circuit 20, one end of the fifth resistor R5 is connected with the control circuit 20, the other end of the fifth resistor R5 is connected with the base electrode of the first triode Q1, one end of the sixth resistor R6 is connected with the auxiliary power supply 50, the other end of the sixth resistor R6 is connected with the collector electrode of the first triode Q1, one end of the second capacitor C2 is connected with the collector electrode of the first triode Q1, and the other end of the second capacitor C2 is grounded.
When the first transistor Q1 receives a control signal, for example, a high level signal is received, the first transistor Q1 is turned on, the signal output circuit 11 outputs a first signal to the on-off circuit 12, and the on-off circuit 12 is turned off. When the audio device 100 operates normally, the control circuit 20 outputs a low level signal, the first transistor Q1 is turned off, and the on-off circuit 12 outputs a second signal. When the audio device 100 is turned off, the first capacitor C1 discharges, the second transistor Q2 is turned on, the first transistor Q1 is turned on, and the on-off circuit 12 outputs the first signal.
Referring to fig. 2, as a further embodiment, the on-off circuit 12 includes a first connection circuit 121 and a second connection circuit 122, and the output circuit 13 includes a first output circuit 131 and a second output circuit 132; the input end of the first connection circuit 121 and the input end of the second connection circuit 122 are both connected with the audio circuit 30, the controlled end of the first connection circuit 121 and the controlled end of the second connection circuit 122 are both connected with the output end of the signal output circuit 11, the output end of the first connection circuit 121 is connected with the input end of the first output circuit 131, the output end of the second connection circuit 122 is connected with the input end of the second output circuit 132, and the output end of the first output circuit 131 and the output end of the second output circuit 132 are both connected with the earphone 200.
The audio circuit 30 may output two audio signals, one of which is a left channel and the other of which is a right channel, and the first connection circuit 121 and the second connection circuit 122, and the first output circuit 131 and the second output circuit 132 may be correspondingly provided. One audio signal output by the audio circuit 30 may be output to the earphone 200 through the first connection circuit 121 and the first output circuit 131, and the other audio signal output by the audio circuit 30 may be output to the earphone 200 through the second connection circuit 122 and the second output circuit 132. The first connection circuit 121 and the second connection circuit 122 are also connected to the signal output circuit 11, and are configured to receive the first signal and the second signal, and to turn off according to the first signal and turn on according to the second signal.
Referring to fig. 4, further, the first connection circuit 121 includes a first fet Q3, a second fet Q4, a seventh resistor R7, and a third capacitor C3; the gate of the first fet Q3 and the gate of the second fet Q4 are both connected to the output end of the signal output circuit 11, the drain of the first fet Q3, one end of the seventh resistor R7, and one end of the third capacitor C3 are all connected to the audio circuit 30, the source of the first fet Q3 is connected to the source of the second fet Q4, and the drain of the second fet Q4 is connected to the input end of the first output circuit 131.
Further, the second connection circuit 122 includes a third fet Q5, a fourth fet Q6, an eighth resistor R8, and a fourth capacitor C4; the gate of the third fet Q5 and the gate of the fourth fet Q6 are both connected to the output end of the signal output circuit 11, the drain of the third fet Q5, one end of the eighth resistor R8, and one end of the fourth capacitor C4 are all connected to the audio circuit 30, the source of the third fet Q5 is connected to the source of the fourth fet Q6, and the drain of the fourth fet Q6 is connected to the input end of the second output circuit 132.
The gates of the first field effect transistor Q3, the second field effect transistor Q4, the third field effect transistor Q5, and the fourth field effect transistor Q6 are all connected to the output end of the signal output circuit 11, and are used for conducting and switching off according to the first signal and the second signal output by the signal output circuit 11. Preferably, when the first fet Q3, the second fet Q4, the third fet Q5, and the fourth fet Q6 receive the first signal, they are turned off, and the second signal is received to be turned on. When the first fet Q3, the second fet Q4, the third fet Q5, and the fourth fet Q6 are all turned on, the on-off circuit 12 is turned on, and the two audio signals output by the audio circuit 30 can enter the first output circuit 131 and the second output circuit 132 through the first fet Q3, the second fet Q4, the third fet Q5, and the fourth fet Q6, respectively, and then be output to the earphone 200. In addition, a first inductor L1 and a second inductor L2 can be added in fig. 4, and the first inductor L1 and the second inductor L2 can be used as a reserved circuit, so that when a user needs to reduce the cost, a related control circuit and a switching tube can be removed, and the first inductor L1 and the second inductor L2 are directly connected.
As a further embodiment, the first output circuit 131 includes a ninth resistor R9, a fifth capacitor C5, and a sixth capacitor C6; one end of the fifth capacitor C5 is connected to the output end of the first connection circuit 121, the other end of the fifth capacitor C5 is connected to one end of the ninth resistor R9, one end of the sixth capacitor C6, and the earphone 200, and both the other end of the ninth resistor R9 and the other end of the sixth capacitor C6 are grounded.
Further, the second output circuit 132 includes a tenth resistor R10, a seventh capacitor C7, and an eighth capacitor; one end of the seventh capacitor C7 is connected to the output end of the second connection circuit 122, the other end of the seventh capacitor C7 is connected to one end of the tenth resistor R10, one end of the eighth capacitor, and the earphone 200, and the other end of the tenth resistor R10 and the other end of the eighth capacitor are grounded.
The ninth resistor R9, the fifth capacitor C5, and the tenth resistor R10, and the seventh capacitor C7 form a filter circuit for filtering the interference signal.
The utility model also discloses an audio device 100 comprising a control circuit 20, an audio circuit 30 and an earphone control circuit 10 according to any of the above embodiments.
The signal output circuit can output the first signal or the second signal according to the control signal of the control circuit, the on-off circuit can be conducted according to the first signal or the second signal, when the on-off circuit is conducted, the audio signal can be output to the earphone through the on-off circuit and the output circuit, when the on-off circuit is turned off, the earphone cannot receive the audio signal, and when the on-off circuit is turned on or turned off, the on-off circuit is turned off, noise generated by the earphone is avoided, and the use experience of a user is improved.
While the utility model has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.
Claims (10)
1. An earphone control circuit, comprising:
The input end of the signal output circuit is connected with the control circuit and is used for outputting a first signal or a second signal according to the control signal of the control circuit;
The input end of the on-off circuit is respectively connected with the audio circuit and the output end of the signal output circuit, and is used for receiving the audio signal output by the audio circuit and switching on and off according to the first signal or the second signal;
The input end of the output circuit is connected with the on-off circuit, and the output end of the output circuit is connected with the earphone;
When the on-off circuit is conducted, the audio signal is output to the earphone through the output circuit.
2. The earphone control circuit of claim 1, wherein the signal output circuit comprises a first transistor, a second transistor, and a first capacitor;
The base electrode of the first triode is connected with the control circuit, the collector electrode of the first triode is connected with the input end of the on-off circuit, and the emitter electrode of the first triode is grounded;
The base of the second triode is connected with a power supply, the collector of the second triode is connected with the control circuit, one end of the first capacitor is respectively connected with the power supply and the emitter of the second triode, and the other end of the first capacitor is grounded.
3. The earphone control circuit according to claim 2, wherein the signal output circuit further comprises a first resistor, a second resistor, a third resistor, and a first diode;
one end of the first resistor is connected with the power supply, the other end of the first resistor is connected with one end of the second resistor and the positive electrode of the first diode respectively, the other end of the second resistor is connected with the base electrode of the first triode, the negative electrode of the first diode is connected with one end of the first capacitor and one end of the third resistor respectively, and the other end of the third resistor is grounded.
4. The earphone control circuit of claim 3, wherein the signal output circuit further comprises a fourth resistor, a fifth resistor, a sixth resistor, and a second capacitor;
one end of the fourth resistor is connected with an auxiliary power supply, the other end of the fourth resistor is connected with the control circuit, one end of the fifth resistor is connected with the control circuit, the other end of the fifth resistor is connected with the base electrode of the first triode, one end of the sixth resistor is connected with the auxiliary power supply, the other end of the sixth resistor is connected with the collector electrode of the first triode, one end of the second capacitor is connected with the collector electrode of the first triode, and the other end of the second capacitor is grounded.
5. The headset control circuit of claim 1 wherein the on-off circuit comprises a first connection circuit and a second connection circuit, the output circuit comprising a first output circuit and a second output circuit;
The input end of the first connecting circuit and the input end of the second connecting circuit are connected with the audio circuit, the controlled end of the first connecting circuit and the controlled end of the second connecting circuit are connected with the output end of the signal output circuit, the output end of the first connecting circuit is connected with the input end of the first output circuit, the output end of the second connecting circuit is connected with the input end of the second output circuit, and the output end of the first output circuit and the output end of the second output circuit are connected with the earphone.
6. The earphone control circuit of claim 5, wherein the first connection circuit comprises a first field effect transistor, a second field effect transistor, a seventh resistor, and a third capacitor;
the grid electrode of the first field effect tube and the grid electrode of the second field effect tube are connected with the output end of the signal output circuit, the drain electrode of the first field effect tube, one end of the seventh resistor and one end of the third capacitor are connected with the audio circuit, the source electrode of the first field effect tube is connected with the source electrode of the second field effect tube, and the drain electrode of the second field effect tube is connected with the input end of the first output circuit.
7. The earphone control circuit of claim 6, wherein the second connection circuit comprises a third field effect transistor, a fourth field effect transistor, an eighth resistor, and a fourth capacitor;
The grid electrode of the third field effect tube and the grid electrode of the fourth field effect tube are connected with the output end of the signal output circuit, the drain electrode of the third field effect tube, one end of the eighth resistor and one end of the fourth capacitor are connected with the audio circuit, the source electrode of the third field effect tube is connected with the source electrode of the fourth field effect tube, and the drain electrode of the fourth field effect tube is connected with the input end of the second output circuit.
8. The earphone control circuit of claim 5, wherein the first output circuit comprises a ninth resistor, a fifth capacitor, and a sixth capacitor;
One end of the fifth capacitor is connected with the output end of the first connecting circuit, the other end of the fifth capacitor is respectively connected with one end of the ninth resistor, one end of the sixth capacitor and the earphone, and the other end of the ninth resistor and the other end of the sixth capacitor are grounded.
9. The earphone control circuit of claim 8, wherein the second output circuit comprises a tenth resistor, a seventh capacitor, and an eighth capacitor;
One end of the seventh capacitor is connected with the output end of the second connecting circuit, the other end of the seventh capacitor is respectively connected with one end of the tenth resistor, one end of the eighth capacitor and the earphone, and the other end of the tenth resistor and the other end of the eighth capacitor are grounded.
10. An audio device comprising a control circuit, an audio circuit, and an earphone control circuit as claimed in any one of claims 1 to 9; the control circuit and the audio circuit are both connected with the earphone control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322515687.XU CN220896832U (en) | 2023-09-15 | 2023-09-15 | Earphone control circuit and audio equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322515687.XU CN220896832U (en) | 2023-09-15 | 2023-09-15 | Earphone control circuit and audio equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220896832U true CN220896832U (en) | 2024-05-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322515687.XU Active CN220896832U (en) | 2023-09-15 | 2023-09-15 | Earphone control circuit and audio equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220896832U (en) |
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2023
- 2023-09-15 CN CN202322515687.XU patent/CN220896832U/en active Active
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