CN216852310U - Earphone shutdown circuit and headphone - Google Patents
Earphone shutdown circuit and headphone Download PDFInfo
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- CN216852310U CN216852310U CN202220554326.9U CN202220554326U CN216852310U CN 216852310 U CN216852310 U CN 216852310U CN 202220554326 U CN202220554326 U CN 202220554326U CN 216852310 U CN216852310 U CN 216852310U
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Abstract
The application provides an earphone shutdown circuit and a headset. The earphone shutdown circuit comprises an earphone central controller, a first shutdown circuit and a second shutdown circuit; the first shutdown circuit comprises a power switch, a first electronic switching tube, a second electronic switching tube and a first diode, wherein the first end of the second electronic switching tube is connected with the control end of the first electronic switching tube, and the first end of the first electronic switching tube is connected with the power supply end of the earphone central controller; the second shutdown circuit comprises a third electronic switching tube and a second diode, wherein the first end of the third electronic switching tube is connected with the power supply detection end of the earphone central controller, the enabling end of the earphone central controller is connected with the anode of the second diode, and the cathode of the second diode is connected with the cathode of the first diode. The power switch is closed, so that the first electronic switch tube and the second electronic switch tube are simultaneously closed, the power supply between the external power supply and the earphone central controller is conveniently and quickly cut off, and the shutdown power consumption of the earphone shutdown circuit is effectively reduced.
Description
Technical Field
The utility model relates to an earphone technical field especially relates to an earphone shutdown circuit and headphone.
Background
With the development of the consumer electronics industry, various consumer electronics products are in a wide range, and the application of various sensors to electronic equipment also increases the technological content of the products. Headphones, which are a commonly used electronic product, are also developed to a higher end. Most earphones adopt a lithium battery as a power supply, and the battery is always connected to a chip power supply pin in a shutdown state, so that the system is always in a standby process.
However, the MCU chip of the headset needs to consume power in the power-off state, which is called power-off power consumption, and a part of the MCU power-off power consumption is relatively high, which causes the power of the battery in the headset to be severely reduced, even the battery voltage is reduced below the power-on voltage, so that the user has to charge the battery before powering on the headset.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the weak point among the prior art, provide an earphone shutdown circuit and headphone that effectively reduce the power consumption of shutting down.
The purpose of the utility model is realized through the following technical scheme:
a headset shutdown circuit, comprising: the earphone central controller, the first shutdown circuit and the second shutdown circuit; the first shutdown circuit comprises a power switch, a first electronic switch tube, a second electronic switch tube and a first diode, wherein a first end of the power switch is used for being connected with an external power supply, a first end of the power switch is also connected with a second end of the first electronic switch tube, a second end of the power switch is connected with an anode of the first diode, a cathode of the first diode is connected with a control end of the second electronic switch tube, a second end of the second electronic switch tube is grounded, a first end of the second electronic switch tube is connected with the control end of the first electronic switch tube, and a first end of the first electronic switch tube is connected with a power supply end of a controller in the earphone; the second shutdown circuit comprises a third electronic switch tube and a second diode, a second end of the power switch is connected with a control end of the third electronic switch tube, a first end of the third electronic switch tube is connected with a power supply detection end of the earphone central controller, a second end of the third electronic switch tube is grounded, an enabling end of the earphone central controller is connected with an anode of the second diode, a cathode of the second diode is connected with a cathode of the first diode, and the enabling end is used for outputting a low level signal when the voltage of the power supply detection end is changed from a high level to a low level.
In one embodiment, the first shutdown circuit further includes a first resistor, a cathode of the first diode is connected to a first end of the first resistor, and a second end of the first resistor is connected to the control end of the second electronic switch tube.
In one embodiment, the first shutdown circuit further includes a first capacitor, the control terminal of the second electronic switch tube is connected to the first terminal of the first capacitor, and the second terminal of the first capacitor is grounded.
In one embodiment, the first shutdown circuit further includes a second resistor, a first end of the first capacitor is connected to a first end of the second resistor, and a second end of the second resistor is grounded.
In one embodiment, the first shutdown circuit further includes a third resistor, the second end of the first electronic switching tube is connected to the first end of the third resistor, the second end of the third resistor is connected to the first end of the second electronic switching tube, the first electronic switching tube is a P-type field effect transistor, and the second electronic switching tube is an N-type field effect transistor.
In one embodiment, the second shutdown circuit further includes a fourth resistor, the enable terminal of the central controller of the headset is connected to a first terminal of the fourth resistor, and a second terminal of the fourth resistor is connected to the anode of the second diode.
In one embodiment, the second shutdown circuit further includes a fifth resistor, the second terminal of the power switch is connected to the first terminal of the fifth resistor, and the second terminal of the fifth resistor is connected to the control terminal of the third electronic switching tube.
In one embodiment, the second shutdown circuit further includes a sixth resistor, the control end of the third electronic switching tube is connected to the first end of the sixth resistor, and the second end of the sixth resistor is grounded.
In one embodiment, the second shutdown circuit further includes a second capacitor, the control terminal of the third electronic switch tube is connected to the first terminal of the second capacitor, and the second terminal of the second capacitor is grounded.
A headset comprising the headset power-off circuit of any of the above embodiments.
Compared with the prior art, the utility model discloses at least, following advantage has:
when the earphone is shut down, the power switch is closed, the third electronic switch tube is conducted, the enabling end of the controller in the earphone outputs a low level, the first electronic switch tube and the second electronic switch tube are enabled to be closed simultaneously, the external power supply and the controller in the earphone are directly disconnected, the power supply between the external power supply and the controller in the earphone is conveniently and rapidly cut off, and the shutdown power consumption of the earphone shutdown circuit is effectively reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a circuit diagram of a headset shutdown circuit according to an embodiment.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a single embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The utility model relates to an earphone shutdown circuit. In one embodiment, the headset power-off circuit includes a headset central controller, a first power-off circuit and a second power-off circuit. The first shutdown circuit comprises a power switch, a first electronic switch tube, a second electronic switch tube and a first diode. The first end of the power switch is used for being connected with an external power supply, the first end of the power switch is further connected with the second end of the first electronic switch tube, and the second end of the power switch is connected with the anode of the first diode. And the cathode of the first diode is connected with the control end of the second electronic switching tube. The second end of the second electronic switch tube is grounded, and the first end of the second electronic switch tube is connected with the control end of the first electronic switch tube. And the first end of the first electronic switching tube is connected with the power supply end of the controller in the earphone. The second shutdown circuit comprises a third electronic switching tube and a second diode. And the second end of the power switch is connected with the control end of the third electronic switch tube. The first end of the third electronic switching tube is connected with the power supply detection end of the earphone central controller, and the second end of the third electronic switching tube is grounded. And the enabling end of the controller in the earphone is connected with the anode of the second diode. And the cathode of the second diode is connected with the cathode of the first diode. The enabling end is used for outputting a low level signal when the voltage of the power supply detection end is changed from a high level to a low level. When the earphone is shut down, the power switch is closed, the third electronic switch tube is conducted, the enabling end of the controller in the earphone outputs a low level, the first electronic switch tube and the second electronic switch tube are enabled to be closed simultaneously, the external power supply and the controller in the earphone are directly disconnected, the power supply between the external power supply and the controller in the earphone is conveniently and rapidly cut off, and the shutdown power consumption of the earphone shutdown circuit is effectively reduced.
Please refer to fig. 1, which is a circuit diagram of an earphone shutdown circuit according to an embodiment of the present invention.
The headset power-off circuit 10 of an embodiment includes a headset central controller U1, a first power-off circuit 100, and a second power-off circuit 200. The first shutdown circuit 100 includes a power switch SW2, a first electronic switch Q1, a second electronic switch Q2, and a first diode D1. The first end of the power switch SW2 is used for being connected with an external power supply, the first end of the power switch SW2 is further connected with the second end of the first electronic switch tube Q1, and the second end of the power switch SW2 is connected with the positive electrode of the first diode D1. The cathode of the first diode D1 is connected to the control terminal of the second electronic switch Q2. The second terminal of the second electronic switch Q2 is grounded, and the first terminal of the second electronic switch Q2 is connected to the control terminal of the first electronic switch Q1. The first end of the first electronic switch tube Q1 is connected to the power supply terminal SYS _ PWR of the earphone central controller U1. The second shutdown circuit 200 includes a third electronic switch Q3 and a second diode D2. A second terminal of the power switch SW2 is connected to a control terminal of the third electronic switch Q3. A first end of the third electronic switching tube Q3 is connected to a power supply detection end PWR of the headset central controller U1, and a second end of the third electronic switching tube Q3 is grounded. The enabling end of the earphone central controller U1 is connected with the anode of the second diode D2. The cathode of the second diode D2 is connected to the cathode of the first diode D1. The enable terminal SYS _ EN is configured to output a low level signal when the voltage of the power supply detection terminal PWR changes from a high level to a low level.
In this embodiment, when the shutdown is performed, the power switch SW2 is turned on, so that the third electronic switch tube Q3 is turned on, and thus the enable end SYS _ EN of the controller U1 in the headset outputs a low level, and further the first electronic switch tube Q1 and the second electronic switch tube Q2 are turned off simultaneously, thereby directly disconnecting the external power supply and the controller U1 in the headset, facilitating to quickly cut off the power supply between the external power supply and the controller U1 in the headset, and effectively reducing the shutdown power consumption of the headset shutdown circuit.
In one embodiment, referring to fig. 1, the first shutdown circuit 100 further includes a first resistor R4, a cathode of the first diode D1 is connected to a first end of the first resistor R4, and a second end of the first resistor R4 is connected to a control end of the second electronic switch Q2. In this embodiment, the first resistor R4 is located between the first diode D1 and the second electronic switch tube Q2, specifically, the first resistor R4 is located between the cathode of the first diode D1 and the control end of the second electronic switch tube Q2, so that the first resistor R4 is connected in series between the cathode of the first diode D1 and the control end of the second electronic switch tube Q2, and thus the first resistor R4 serves as an input resistor of the control end of the second electronic switch tube Q2. The first resistor R4 is used for limiting the current flowing into the control end of the second electronic switch tube Q2, and the first resistor R4 is used for dividing the voltage loaded on the control end of the second electronic switch tube Q2, so that the probability of overlarge current on the control end of the second electronic switch tube Q2 is reduced, and the normal operation of the second electronic switch tube Q2 is ensured.
In one embodiment, referring to fig. 1, the first shutdown circuit 100 further includes a first capacitor C3, a control terminal of the second electronic switch Q2 is connected to a first terminal of the first capacitor C3, and a second terminal of the first capacitor C3 is grounded. In this embodiment, the first end of the first capacitor C3 is connected to the control end of the second electronic switch Q2, the control end of the second electronic switch Q2 is configured to receive a switching signal of the external power source, that is, an electrical signal corresponding to the on/off state of the power switch SW2, and the first capacitor C3 performs filtering processing on the switching signal, so that interference in the switching signal received by the control end of the second electronic switch Q2 is reduced, and thus the switching signal received by the control end of the second electronic switch Q2 is more stable, and it is convenient to accurately respond to the operating state of the power switch SW 2.
Further, the first shutdown circuit 100 further includes a second resistor R1, a first end of the first capacitor C3 is connected to a first end of the second resistor R1, and a second end of the second resistor R1 is grounded. In this embodiment, during the process that the first capacitor C3 filters the switching signal received by the control end of the second electronic switching tube Q2, the first capacitor C3 is in a charging state, so that the voltage across the first capacitor C3 is increased. After shutdown, in order to avoid that the first electronic switch Q1 and the second electronic switch Q2 are turned on again by the charge remaining in the first capacitor C3, the second resistor R1 discharges the charge remaining in the first capacitor C3, and the second resistor R1 and the first capacitor C3 form a discharge loop, so as to facilitate consumption of the charge remaining in the first capacitor C3.
In one embodiment, referring to fig. 1, the first shutdown circuit 100 further includes a third resistor R2, a second terminal of the first electronic switch Q1 is connected to a first terminal of the third resistor R2, a second terminal of the third resistor R2 is connected to a first terminal of the second electronic switch Q2, the first electronic switch Q1 is a P-type field effect transistor, and the second electronic switch Q2 is an N-type field effect transistor. In this embodiment, the first electronic switch Q1 is turned on at a high level, and the second electronic switch Q2 is turned on at a low level, that is, when the voltage at the control terminal of the first electronic switch Q1 is a high voltage, the first electronic switch Q1 is turned on; when the voltage at the control terminal of the second electronic switch Q2 is low, the second electronic switch Q2 is turned on. A first terminal of the third resistor R2 is connected to an external power source, and a second terminal of the third resistor R2 is connected to a first terminal of the second electronic switch Q2, so that the control terminal of the second electronic switch Q2 is kept at a low level before shutdown, and thus the second electronic switch Q2 is kept on before shutdown. Before the power-off, the earphone central controller U1 is initialized to power on, and the enable terminal SYS _ EN of the earphone central controller U1 keeps outputting at a high level, so that the first electronic switch Q1 is turned on.
In one embodiment, referring to fig. 1, the second shutdown circuit 200 further includes a fourth resistor R3, the enable terminal SYS _ EN of the headset central controller U1 is connected to a first terminal of the fourth resistor R3, and a second terminal of the fourth resistor R3 is connected to the anode of the second diode D2. In this embodiment, the fourth resistor R3 is located between the headphone central controller U1 and the second diode D2, and specifically, the fourth resistor R3 is located between the enable terminal SYS _ EN of the headphone central controller U1 and the positive electrode of the second diode D2, so that the fourth resistor R3 is connected in series between the headphone central controller U1 and the second diode D2. The fourth resistor R3 limits the output current of the enable terminal SYS _ EN of the earphone central controller U1, so that the fourth resistor R3 divides the voltage at the control terminal of the second electronic switching tube Q2, thereby effectively reducing the probability of the voltage at the control terminal of the second electronic switching tube Q2 being too large, and ensuring the normal operation of the second electronic switching tube Q2.
In one embodiment, referring to fig. 1, the second shutdown circuit 200 further includes a fifth resistor R5, a second terminal of the power switch SW2 is connected to a first terminal of the fifth resistor R5, and a second terminal of the fifth resistor R5 is connected to a control terminal of the third electronic switch Q3. In this embodiment, the fifth resistor R5 is located between the power switch SW2 and the third electronic switch Q3, specifically, the fifth resistor R5 is located between the second end of the power switch SW2 and the control end of the third electronic switch Q3, so that the fifth resistor R5 is connected in series with the control end of the third electronic switch Q3, and the fifth resistor R5 limits the current flowing into the control end of the third electronic switch Q3, thereby effectively reducing the probability of excessive current flowing through the control end of the third electronic switch Q3, and ensuring the normal operation of the third electronic switch Q3.
In one embodiment, referring to fig. 1, the second shutdown circuit 200 further includes a sixth resistor R6, the control terminal of the third electronic switch Q3 is connected to the first terminal of the sixth resistor R6, and the second terminal of the sixth resistor R6 is grounded. In this embodiment, the first end of the sixth resistor R6 is connected to the control end of the third electronic switch Q3, and the second end of the sixth resistor R6 is connected to the common ground together with the second end of the third electronic switch Q3, so that the sixth resistor R6 is connected in parallel between the control end and the second end of the third electronic switch Q3, which facilitates improving the static operating point of the third electronic switch Q3, thereby facilitating increasing the forward bias rate of the third electronic switch Q3 and effectively improving the operating stability of the third electronic switch Q3.
In one embodiment, referring to fig. 1, the second shutdown circuit 200 further includes a second capacitor C6, the control terminal of the third electronic switch Q3 is connected to the first terminal of the second capacitor C6, and the second terminal of the second capacitor C6 is grounded. In this embodiment, the first end of the second capacitor C6 is connected to the control end of the third electronic switch Q3, the second end of the second capacitor C6 is connected to the common ground together with the second end of the third electronic switch Q3, so that the second capacitor C6 is connected in parallel between the control end and the second end of the third electronic switch Q3, and the second capacitor C6 filters the control signal received by the control end of the third electronic switch Q3, which effectively improves the accuracy of the signal received by the control end of the third electronic switch Q3, and further improves the operating stability of the third electronic switch Q3.
The on/off state of the earphone shutdown circuit is specifically described as follows:
the first electronic switch tube Q1 is a P-type fet, and the second electronic switch tube Q2 is an N-type fet. The control end of the first electronic switch tube Q1 is the gate of a P-type field effect transistor, the first end of the first electronic switch tube Q1 is the drain of the P-type field effect transistor, and the second end of the first electronic switch tube Q1 is the source of the P-type field effect transistor. The control end of the second electronic switch tube Q2 is the grid electrode of the N-type field effect transistor, the first end of the second electronic switch tube Q2 is the drain electrode of the N-type field effect transistor, and the second end of the second electronic switch tube Q2 is the source electrode of the N-type field effect transistor. The third electronic switching tube Q3 is an NPN-type triode, the control terminal of the third electronic switching tube Q3 is a base electrode of the NPN-type triode, the first terminal of the third electronic switching tube Q3 is a collector electrode of the NPN-type triode, and the second terminal of the third electronic switching tube Q3 is an emitter electrode of the NPN-type triode. The earphone central controller U1 is an earphone built-in MCU for controlling the on and off of each function of the earphone.
One, start up
1. When the power switch SW2 is pressed, the control end of the second electronic switch tube Q2 is at a high level, so that the second electronic switch tube Q2 is turned from an off state to an on state, the control end of the first electronic switch tube Q1 is at a low level, the first electronic switch tube Q1 is also turned from the off state to the on state, and at this time, the external power supply supplies power to the headset central controller U1 through the first electronic switch tube Q1;
2. at this time, the control terminal of the third electronic switching tube Q3 has current and is at a high level, so that the third electronic switching tube Q3 also changes from an off state to an on state, and the power supply detection terminal PWR of the headset central controller U1 is at a low level;
3. after the earphone central controller U1 detects that the power supply detection end PWR is at a low level for a period of time, the earphone central controller U1 starts startup initialization, and continuously outputs a high level through the enable end SYS _ EN of the earphone central controller U1, so as to keep the first electronic switch tube Q1 and the second electronic switch tube Q2 continuously conducted, and ensure that an external power supply continuously supplies power to the earphone central controller U1, thereby realizing the startup of the earphone, wherein after the startup initialization is completed, the earphone central controller U1 controls the enable end SYS _ EN to also output a high level.
Second, shut down
The power switch SW2 is pressed again, the power supply detection end PWR of the earphone central controller U1 is converted from high level to low level, and after the earphone central controller U1 is processed, the earphone central controller U1 controls the enable end SYS _ EN to output low level, so that the first electronic switch tube Q1 and the second electronic switch tube Q2 are both switched from on state to off state, thereby realizing fast shutdown and reducing shutdown energy consumption.
In one embodiment, the present application further provides a headset including the headset power-off circuit described in any of the above embodiments. In this embodiment, the earphone shutdown circuit includes an earphone central controller, a first shutdown circuit, and a second shutdown circuit. The first shutdown circuit comprises a power switch, a first electronic switch tube, a second electronic switch tube and a first diode. The first end of the power switch is used for being connected with an external power supply, the first end of the power switch is further connected with the second end of the first electronic switch tube, and the second end of the power switch is connected with the anode of the first diode. And the cathode of the first diode is connected with the control end of the second electronic switch tube. The second end of the second electronic switch tube is grounded, and the first end of the second electronic switch tube is connected with the control end of the first electronic switch tube. And the first end of the first electronic switching tube is connected with the power supply end of the earphone central controller. The second shutdown circuit comprises a third electronic switching tube and a second diode. And the second end of the power switch is connected with the control end of the third electronic switching tube. The first end of the third electronic switching tube is connected with the power supply detection end of the earphone central controller, and the second end of the third electronic switching tube is grounded. And the enabling end of the controller in the earphone is connected with the anode of the second diode. And the cathode of the second diode is connected with the cathode of the first diode. The enabling end is used for outputting a low level signal when the voltage of the power supply detection end is changed from a high level to a low level. When the earphone is shut down, the power switch is closed, the third electronic switch tube is conducted, the enabling end of the controller in the earphone outputs a low level, the first electronic switch tube and the second electronic switch tube are enabled to be closed simultaneously, the external power supply and the controller in the earphone are directly disconnected, the power supply between the external power supply and the controller in the earphone is conveniently and rapidly cut off, and the shutdown power consumption of the earphone shutdown circuit is effectively reduced.
The above-mentioned embodiments only represent several embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. An earphone shutdown circuit, comprising:
a controller in the earphone is connected with the earphone,
the earphone comprises a first shutdown circuit, a second shutdown circuit and a first diode, wherein the first shutdown circuit comprises a power switch, a first electronic switch tube, a second electronic switch tube and the first diode, the first end of the power switch is used for being connected with an external power supply, the first end of the power switch is also connected with the second end of the first electronic switch tube, the second end of the power switch is connected with the anode of the first diode, the cathode of the first diode is connected with the control end of the second electronic switch tube, the second end of the second electronic switch tube is grounded, the first end of the second electronic switch tube is connected with the control end of the first electronic switch tube, and the first end of the first electronic switch tube is connected with the power supply end of a controller in the earphone;
the second shutdown circuit, the second shutdown circuit includes third electronic switch pipe and second diode, switch's second end with the control end of third electronic switch pipe is connected, the first end of third electronic switch pipe with the power supply detection end of accuse ware is connected in the earphone, the second end ground connection of third electronic switch pipe, the enable end of accuse ware in the earphone with the positive pole of second diode is connected, the negative pole of second diode with the first diode negative pole is connected, the enable end is used for when the voltage of power supply detection end is changed into the low level by the high level, exports low level signal.
2. The headset shutdown circuit of claim 1, wherein the first shutdown circuit further comprises a first resistor, a negative terminal of the first diode is connected to a first terminal of the first resistor, and a second terminal of the first resistor is connected to the control terminal of the second electronic switch tube.
3. The headset shutdown circuit of claim 1, wherein the first shutdown circuit further comprises a first capacitor, the control terminal of the second electronic switching tube is connected to the first terminal of the first capacitor, and the second terminal of the first capacitor is grounded.
4. The headset shutdown circuit of claim 3, wherein the first shutdown circuit further comprises a second resistor, a first terminal of the first capacitor is connected to a first terminal of the second resistor, and a second terminal of the second resistor is connected to ground.
5. The headset shutdown circuit of claim 1, wherein the first shutdown circuit further comprises a third resistor, the second terminal of the first electronic switch is connected to the first terminal of the third resistor, the second terminal of the third resistor is connected to the first terminal of the second electronic switch, the first electronic switch is a P-type fet, and the second electronic switch is an N-type fet.
6. The headset shutdown circuit of claim 1, wherein the second shutdown circuit further comprises a fourth resistor, the enable terminal of the headset central controller is connected to a first terminal of the fourth resistor, and a second terminal of the fourth resistor is connected to the anode of the second diode.
7. The headset shutdown circuit of claim 1, wherein the second shutdown circuit further comprises a fifth resistor, the second terminal of the power switch is connected to the first terminal of the fifth resistor, and the second terminal of the fifth resistor is connected to the control terminal of the third electronic switching tube.
8. The headset shutdown circuit of claim 1, wherein the second shutdown circuit further comprises a sixth resistor, the control terminal of the third electronic switching tube is connected to a first terminal of the sixth resistor, and a second terminal of the sixth resistor is grounded.
9. The headset shutdown circuit of claim 1, wherein the second shutdown circuit further comprises a second capacitor, the control terminal of the third electronic switch tube is connected to the first terminal of the second capacitor, and the second terminal of the second capacitor is grounded.
10. A headphone comprising a headphone power-off circuit as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220554326.9U CN216852310U (en) | 2022-03-14 | 2022-03-14 | Earphone shutdown circuit and headphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220554326.9U CN216852310U (en) | 2022-03-14 | 2022-03-14 | Earphone shutdown circuit and headphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216852310U true CN216852310U (en) | 2022-06-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220554326.9U Active CN216852310U (en) | 2022-03-14 | 2022-03-14 | Earphone shutdown circuit and headphone |
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| Country | Link |
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| CN (1) | CN216852310U (en) |
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- 2022-03-14 CN CN202220554326.9U patent/CN216852310U/en active Active
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