Headphone reset circuit and headphones

Abstract

The present invention discloses an earphone reset circuit and an earphone, wherein the earphone reset circuit comprises: an RC circuit, one end of the RC circuit is electrically connected to the output end of the temperature detection module of the earphone; a transistor Q2, the gate of the transistor Q2 is electrically connected to the capacitor and resistor connection end in the RC circuit; a transistor Q1, the gate of the transistor Q1 is electrically connected to the drain of the transistor Q2, and the drain of the transistor Q1 is electrically connected to the reset end of the earphone; when the transistor Q2 is turned on, the drain of the transistor Q2 outputs a high level to turn on the transistor Q1, and the source of the transistor Q1 outputs a high level. The technical solution of the present invention enables the drain of the transistor Q1 to output a high level during the charging and discharging process of the RC circuit, and then conducts the high level to the reset end of the earphone, so that the earphone can be accurately reset after the user takes off the earphone, and the earphone can be reset without any operation by the user, thereby improving the convenience of earphone reset.

Description

Technical Field

[0001] The present invention relates to the field of circuit technology, and in particular to an earphone reset circuit and an earphone. Background Art

[0002] TWS (True Wireless Stereo) headphones are becoming more and more popular in the market due to their small size, comfortable wearing, easy to use and convenient to carry. With the development of TWS headphones, people always hope that TWS can reduce the size and reduce the window of the structure, which greatly compresses the hardware design space of the headphones. With the increasing number of functions of TWS headphones, the headphone software has also become more complicated, which increases the possibility of headphone software running out of control to a certain extent. When the software runs out of control, the headphones often need to be reset through hardware circuits.

[0003] At present, the common hard reset method is system power-off reset or reset chip implementation. Power-off reset requires the use of a charging box and a series of key operations, and adds a logic circuit chip, which is inconvenient to use. In addition to the high cost of the reset chip implementation process, it also requires certain peripheral circuit support, and its implementation process is relatively complicated. Summary of the invention

[0004] The main purpose of the present invention is to provide an earphone reset circuit and an earphone, aiming to solve the technical problem that the existing earphone reset is not convenient enough.

[0005] To achieve the above object, the present invention provides an earphone reset circuit, the earphone reset circuit comprising:

[0006] An RC circuit, one end of which is electrically connected to an output end of the temperature detection module of the earphone;

[0007] A transistor Q2, wherein the gate of the transistor Q2 is electrically connected to a capacitor and resistor connection end in the RC circuit;

[0008] A transistor Q1, wherein the gate of the transistor Q1 is electrically connected to the drain of the transistor Q2, and the drain of the transistor Q1 is electrically connected to the reset terminal of the earphone;

[0009] When the transistor Q2 is turned on, the drain of the transistor Q2 outputs a high level, so that the transistor Q1 is turned on, and the source of the transistor Q1 outputs a high level.

[0010] Further, when the temperature detected by the temperature detection module is lower than a preset temperature, the output end of the temperature detection module is at a high level, and when the temperature detected by the temperature detection module is greater than or equal to the preset temperature, the output end of the temperature detection module is at a low level.

[0011] Furthermore, the RC circuit includes a capacitor C1 and a resistor R3, one end of the capacitor C1 is electrically connected to the output end of the temperature detection module, and the other end of the capacitor C1 is electrically connected to the resistor R3.

[0012] Furthermore, one end of the resistor R3 is grounded.

[0013] Furthermore, the source of the transistor Q2 is grounded, and the drain of the transistor Q2 is electrically connected to a power supply.

[0014] Furthermore, the drain of the transistor Q2 is electrically connected to the power supply through the resistor R2.

[0015] Furthermore, the drain of the transistor Q1 is grounded via a capacitor C3, and the source of the transistor Q1 is electrically connected to a power supply.

[0016] Furthermore, the source of the transistor Q1 is electrically connected to a power source via a resistor R1.

[0017] Furthermore, the transistor Q1 includes a MOS transistor, and the transistor Q2 includes a MOS transistor.

[0018] The present invention further provides an earphone, which comprises the earphone reset circuit mentioned above.

[0019] The technical solution of the present invention adopts one end of the RC circuit to be electrically connected to the output end of the temperature detection module of the earphone, the gate of the transistor Q2 is electrically connected to the capacitor and resistor connection end in the RC circuit; the gate of the transistor Q1 is electrically connected to the drain of the transistor Q2, and the drain of the transistor Q1 is electrically connected to the reset end of the earphone. The charging and discharging process of the RC circuit turns on the transistor Q2, and the low level of the drain of the transistor Q2 turns on the transistor Q1, so that the drain of the transistor Q1 outputs a high level, and then the high level is transmitted to the reset end of the earphone, so that the earphone can be accurately reset after the user takes off the earphone, and the earphone can be reset without any operation by the user, thereby improving the convenience of earphone reset. In addition, the earphone reset is realized by using simple components such as transistors, which greatly reduces the cost of the earphone and the complexity of the reset circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 FIG. 2 is a schematic diagram of a circuit structure of an earphone reset circuit according to an embodiment of the present invention.

[0021] Description of Figure Numbers:

[0022] Label name Label name 10 Output 20 Reset terminal

[0023] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0026] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0027] The invention provides an earphone reset circuit.

[0028] Reference Figure 1 , Figure 1 FIG. 2 is a schematic diagram of a circuit structure of an earphone reset circuit according to an embodiment of the present invention.

[0029] In the embodiment of the present invention, Figure 1 As shown, the headphone reset circuit includes an RC circuit, a transistor Q1 and a transistor Q2. The transistor Q1 and the transistor Q2 are both MOS transistors. Specifically, the transistor Q1 and the transistor Q2 can be MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor, Metal-Oxide Semiconductor Field-Effect Transistor) / MOS transistors, such as super junction MOSFET or SiC-MOSFET

[0030] One end of the RC circuit is electrically connected to the output end 10 of the temperature detection module of the earphone.

[0031] Among them, the temperature detection module is arranged in the earphone. When the user takes out the earphone from the charging box and wears it, the earphone contacts the human body, and the temperature detected by the temperature detection module changes from low to high. When the temperature detected by the temperature detection module is greater than or equal to the preset temperature, the output end 10 of the temperature detection module is a low level. After the user takes off the earphone after using it, the temperature detected by the temperature detection module changes from high to low. When the temperature detected by the temperature detection module is lower than the preset temperature, the output end 10 of the temperature detection module is a high level.

[0032] The gate of the transistor Q2 is electrically connected to the capacitor and resistor connection terminal in the RC circuit.

[0033] The gate of the transistor Q1 is electrically connected to the drain of the transistor Q2 , and the drain of the transistor Q1 is electrically connected to the reset terminal 20 of the earphone.

[0034] In this embodiment, when the transistor Q2 is turned on, the drain of the transistor Q2 outputs a high level to turn on the transistor Q1, and the source of the transistor Q1 outputs a high level, so that the signal received by the reset terminal 20 is a high level, and the reset terminal 20 is connected to the Reset pin of the headphone MCU to reset the headphone.

[0035] Further, in one embodiment, the RC circuit includes a capacitor C1 and a resistor R3, one end of the capacitor C1 is electrically connected to the output terminal 10 of the temperature detection module, and the other end is electrically connected to the resistor R3. Preferably, one end of the resistor R3 is grounded. The resistance value of the resistor R3 is 100KΩ (ohm), and the capacitor C1 is a 1μf, 10V capacitor.

[0036] In this embodiment, after the user takes off the earphones after using them, the temperature detected by the temperature detection module changes from high to low. When the temperature detected by the temperature detection module is lower than the preset temperature, the output terminal 10 of the temperature detection module is at a high level. At this time, the RC circuit composed of the capacitor C1 and the resistor R3 is charged. After the RC circuit is charged, it is discharged to the ground through the resistor R3. The transistor Q2 is turned on by the charging and discharging of the capacitor C1, and the transistor Q2 can be turned on accurately, so as to achieve accurate resetting of the earphones after the user takes off the earphones.

[0037] Furthermore, in another embodiment, the source of the transistor Q2 is grounded, and the drain of the transistor Q2 is electrically connected to the power supply. Preferably, the drain of the transistor Q2 is electrically connected to the power supply through a resistor R2, that is, one end of the resistor R2 is electrically connected to the drain of the transistor Q2, and the other end is electrically connected to the power supply.

[0038] In this embodiment, since the gate of the transistor Q2 is electrically connected to the capacitor-resistor connection end in the RC circuit, that is, the gate of the transistor Q2 is electrically connected to the connection between the capacitor C1 and the resistor R3, during the charging and discharging process of the RC circuit, the gate of the transistor Q2 maintains a high level for a period of time. Specifically, the gate of the transistor Q2 maintains a high level during the time period when the voltage of the capacitor C1 is greater than the preset voltage, so that the transistor Q2 is turned on, thereby pulling the level between the drain of the transistor Q2 and the resistor R2 to GND (low level), which can accurately turn on the transistor Q1, so that the drain of the transistor Q1 outputs a high level, and then the high level is transmitted to the reset end of the earphone, so that the earphone is accurately reset after the user takes off the earphone.

[0039] Among them, when the user takes out the earphones from the charging box and wears them, the earphones come into contact with the human body, and the temperature detected by the temperature detection module changes from low to high. When the temperature detected by the temperature detection module is greater than or equal to the preset temperature, the output end 10 of the temperature detection module is at a low level, and the gate of the transistor Q2 is in a stable low level state, so that the transistor Q2 is in a stable disconnected state, thereby ensuring that the transistor Q1 is in a stable disconnected state, and the drain of the transistor Q1 is at a low level, thereby ensuring that the earphones will not reset during use.

[0040] Further, in another embodiment, the drain of the transistor Q1 is grounded through the capacitor C3, and the source of the transistor Q1 is electrically connected to the power supply. Preferably, the source of the transistor Q1 is electrically connected to the power supply through the resistor R1. The resistance value of the resistor R1 is 100KΩ (ohm), and the capacitor C3 is a capacitor of 100nf.

[0041] In this embodiment, when the level between the drain of the transistor Q2 and the resistor R2 is pulled to GND (low level), the transistor Q1 is turned on, and the power supply VCHG level forms a conventional RC reset circuit through a resistor R1 and C3. The drain of the transistor Q1 outputs a high level, which is then transmitted to the reset terminal of the earphone, thereby achieving accurate reset of the earphone after the user takes off the earphone.

[0042] When the transistor Q2 is in a stable disconnected state, the drain of the transistor Q1 is at a low level, thereby ensuring that the transistor Q1 is in a stable disconnected state and ensuring that the earphone will not be reset during use.

[0043] In this embodiment, after the user takes off the earphones after using them, the temperature detected by the temperature detection module changes from high to low. When the temperature detected by the temperature detection module is lower than the preset temperature, the output terminal 10 of the temperature detection module is at a high level. At this time, the RC circuit composed of the capacitor C1 and the resistor R3 is charged. During the charging and discharging process of the RC circuit, the gate of the transistor Q2 maintains a high level for a period of time, that is, the gate of the transistor Q2 maintains a high level during the time period when the voltage of the capacitor C1 is greater than the preset voltage, so that the transistor Q2 is turned on, thereby pulling the level between the drain of the transistor Q2 and the resistor R2 to GND (low level), so that the transistor Q1 is turned on, and the power supply VCHG level forms a conventional RC reset circuit through a resistor R1 and C3, and the drain of the transistor Q1 outputs a high level, which is then transmitted to the reset terminal 20 of the earphone, so that the earphone is accurately reset after the user takes off the earphone.

[0044] When the user takes out the earphones from the charging box and wears them, the earphones come into contact with the human body, and the temperature detected by the temperature detection module changes from low to high. When the temperature detected by the temperature detection module is greater than or equal to the preset temperature, the output end of the temperature detection module is at a low level, and the gate of the transistor Q2 is in a stable low level state, so that the transistor Q2 is in a stable disconnected state, thereby ensuring that the transistor Q1 is in a stable disconnected state, and the drain of the transistor Q1 is at a low level, thereby ensuring that the earphones will not reset during use.

[0045] It should be noted that, in order to ensure that the earphone can be reset stably, the power supply of the temperature detection module is an uncontrolled power supply, for example, the power supply of the temperature detection module is VBAT or other power supply that is not controlled by software.

[0046] In the headset reset circuit of the present invention, one end of the RC circuit is electrically connected to the output end of the temperature detection module of the headset, the gate of the transistor Q2 is electrically connected to the capacitor and resistor connection end in the RC circuit; the gate of the transistor Q1 is electrically connected to the drain of the transistor Q2, and the drain of the transistor Q1 is electrically connected to the reset end of the headset. The charging and discharging process of the RC circuit turns on the transistor Q2, and the low level of the drain of the transistor Q2 turns on the transistor Q1, so that the drain of the transistor Q1 outputs a high level, and then the high level is transmitted to the reset end of the headset, so that the headset is accurately reset after the user takes off the headset, and the headset can be reset without any operation by the user, thereby improving the convenience of headset reset. In addition, the headset is reset by using simple components such as transistors, which greatly reduces the cost of the headset and the complexity of the reset circuit.

[0047] The present invention also proposes an earphone, which includes an earphone reset circuit. The specific structure of the earphone reset circuit refers to the above embodiment. Since the earphone adopts all the technical solutions of all the above embodiments, it also has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0048] It should be noted that the technical solutions of the various embodiments of the present invention can be combined with each other, but it must be based on the fact that technical personnel in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0049] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made by using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An earphone reset circuit, characterized in that: The earphone reset circuit comprises: An RC circuit, one end of which is electrically connected to an output end of a temperature detection module of the earphone, wherein when the temperature detected by the temperature detection module is greater than or equal to a preset temperature, the output end of the temperature detection module is at a low level, and when the temperature detected by the temperature detection module is less than the preset temperature, the output end of the temperature detection module is at a high level; A transistor Q2, wherein the gate of the transistor Q2 is electrically connected to a capacitor and resistor connection end in the RC circuit; A transistor Q1, wherein the gate of the transistor Q1 is electrically connected to the drain of the transistor Q2, and the drain of the transistor Q1 is electrically connected to the reset terminal of the earphone; When the transistor Q2 is turned on, the drain of the transistor Q2 outputs a high level, so that the transistor Q1 is turned on, and the source of the transistor Q1 outputs a high level.

2. The earphone reset circuit according to claim 1, characterized in that: When the temperature detected by the temperature detection module is lower than the preset temperature, the output end of the temperature detection module is at a high level, and when the temperature detected by the temperature detection module is greater than or equal to the preset temperature, the output end of the temperature detection module is at a low level.

3. The earphone reset circuit according to claim 1, characterized in that: The RC circuit includes a capacitor C1 and a resistor R3. One end of the capacitor C1 is electrically connected to the output end of the temperature detection module, and the other end of the capacitor C1 is electrically connected to the resistor R3.

4. The earphone reset circuit according to claim 3, characterized in that: One end of the resistor R3 is grounded.

5. The earphone reset circuit according to claim 1, characterized in that: The source of the transistor Q2 is grounded, and the drain of the transistor Q2 is electrically connected to a power source.

6. The earphone reset circuit according to claim 5, characterized in that: The drain of the transistor Q2 is electrically connected to the power supply through the resistor R2.

7. The earphone reset circuit according to claim 1, characterized in that: The drain of the transistor Q1 is grounded via the capacitor C3 , and the source of the transistor Q1 is electrically connected to a power source.

8. The earphone reset circuit according to claim 7, characterized in that: The source of the transistor Q1 is electrically connected to a power source through a resistor R1.

9. The earphone reset circuit according to any one of claims 1 to 8, characterized in that: The transistor Q1 includes a MOS transistor, and the transistor Q2 includes a MOS transistor.

10. A headset, characterized in that: The earphone comprises the earphone reset circuit according to any one of claims 1 to 9.

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