Bluetooth earphone restarting circuit

Abstract

The utility model discloses a bluetooth earphone restart circuit, including OR gate logic chip U2, button and MOS transistor, OR gate logic chip U2 includes input pin A and B pin and output pin Y pin, B pin is connected with resistor R7 and input voltage, the number of button is two, the two button is connected with A pin and B pin respectively, button normal state is high level, the button normal state is high level, the button normal state is high level, the button normal state is low level, and the button normal state is high level. The number of the MOS tubes is two, the two MOS tubes are an NMOSQ1.1 and a PMOSQ1.2 respectively, the grid electrode of the NMOSQ1.1 is connected with the pin Y, the grid electrode of the PMOSQ1.2 is connected with the drain electrode of the NMOSQ1.1, the source electrode of the PMOSQ1.2 is connected with the positive electrode of the power supply, and the drain electrode of the PMOSQ1.2 is connected with the Bluetooth chip. According to the utility model, the power-off restart function is realized by simultaneously pressing the two keys of the earphone in a short time, so that misoperation is avoided, and the restart efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of Bluetooth headset technology and relates to a Bluetooth headset restart circuit. Background Technology

[0002] Bluetooth headphones are wireless headphones that connect to other devices (such as mobile phones, tablets, and computers) via Bluetooth technology to transmit and receive audio. Compared to traditional wired headphones, Bluetooth headphones offer greater convenience and flexibility, allowing for free movement without the need for wires.

[0003] Bluetooth headsets need to be restarted when system malfunctions such as Bluetooth connection failure. Currently, Bluetooth headsets on the market do not support restarting or restarting by pressing and holding the power button. Pressing and holding a button not only easily leads to accidental operation but also reduces the efficiency of restarting. Utility Model Content

[0004] To address the aforementioned problems, this invention proposes a Bluetooth headset restart circuit, which effectively solves the issues in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A Bluetooth headset restart circuit includes:

[0007] The OR gate logic chip U2 includes input pins A and B, and an output pin Y. Pin B is connected to a resistor R7 and an input voltage.

[0008] Two buttons are connected to pin A and pin B respectively, and the buttons are normally at a high level.

[0009] Two MOSFETs, namely NMOSQ1.1 and PMOSQ1.2, are provided. The gate of NMOSQ1.1 is connected to the Y pin, the gate of PMOSQ1.2 is connected to the drain of NMOSQ1.1, the source of PMOSQ1.2 is connected to the positive terminal of the power supply, and the drain of PMOSQ1.2 is connected to the Bluetooth chip.

[0010] Optionally, the drain of the PMOSQ1.2 is connected to a voltage regulator chip U1.

[0011] Optionally, the OR gate logic chip U2 is a 74AHC1G32GW.

[0012] Optionally, the Bluetooth chip is an AC7916A.

[0013] Optionally, the voltage regulator chip U1 is ME6211C33M5G-N.

[0014] Optionally, the button is TS-1187A-BAB.

[0015] Compared with the prior art, the present invention has the following advantages: by pressing the two buttons on the earphone simultaneously for a short time, the power-off restart function can be realized, avoiding accidental operation and improving restart efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0017] Figure 2 This is a circuit diagram of the restart circuit section of an embodiment of this utility model. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1 and Figure 2 This invention discloses a Bluetooth headset restart circuit, comprising an OR gate logic chip U2, buttons, and MOSFETs. The OR gate logic chip U2 includes input pins A and B, and an output pin Y. Pin B is connected to a resistor R7 and an input voltage. Two buttons are provided, connected to pins A and B respectively. The buttons are normally at a high level. Two MOSFETs are provided, namely NMOSQ1.1 and PMOSQ1.2. The gate of NMOSQ1.1 is connected to the Y pin, the gate of PMOSQ1.2 is connected to the drain of NMOSQ1.1, the source of PMOSQ1.2 is connected to the positive power supply, and the drain of PMOSQ1.2 is connected to the Bluetooth chip.

[0020] Specifically, the source of PMOSQ1.2 is connected to the positive terminal of the battery via VBAT, and the drain of PMOSQ1.2 is set to VMCU to connect to the Bluetooth chip. The buttons are SW1 and SW2, which can be used as the mode button and volume + button on a Bluetooth headset. The OR gate logic chip U2 outputs a low level on the Y pin when both pins A and B are low; otherwise, the Y pin outputs a high level.

[0021] In this way, during operation or standby, pin B of the OR gate logic chip U2 is pulled high by resistor R7, the Y pin outputs a high level, NMOSQ1.1 is turned on, the gate of PMOSQ1.2 is low, PMOSQ1.2 is turned on, and the VMCU terminal of PMOSQ1.2 powers the Bluetooth chip. When the system needs to restart, pressing buttons SW1 and SW2 simultaneously causes pins A and B of the OR gate logic chip U2 to go low, the Y pin of the OR gate logic chip U2 to go low, NMOSQ1.1 is not turned on, the gate of PMOSQ1.2 is high, PMOSQ1.2 is not turned on, and the Bluetooth chip is powered off. Releasing the buttons turns PMOSQ1.2 on to power the Bluetooth chip, thus restarting the Bluetooth headset.

[0022] In some feasible configurations, the gate of PMOSQ1.2 is connected to a voltage regulator chip U1, which can be selected as ME6211C33M5G-N. The OR gate logic chip U2 can be selected as 74AHC1G32GW, the button can be selected as TS-1187A-BAB, and the Bluetooth chip of the Bluetooth headset is AC7916A. The source of NMOSQ1.1 is grounded. In this embodiment, which is a Bluetooth headset structure, the ground can be set to be connected to the negative terminal of the power supply. The source and gate of PMOSQ1.2 are both connected to the positive terminal of the power supply.

[0023] In some feasible configurations, buttons SW1 and SW2 can be selected as buttons located on the left and right ears respectively for ease of operation.

[0024] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A Bluetooth headset restart circuit, characterized in that, include: The OR gate logic chip U2 includes input pins A and B, and output pin Y. Pin B is connected to a resistor R7 and an input voltage. Two buttons are connected to pin A and pin B respectively, and the buttons are normally at a high level. Two MOSFETs, namely NMOSQ1.1 and PMOSQ1.2, are provided. The gate of NMOSQ1.1 is connected to the Y pin, the gate of PMOSQ1.2 is connected to the drain of NMOSQ1.1, the source of PMOSQ1.2 is connected to the positive terminal of the power supply, and the drain of PMOSQ1.2 is connected to the Bluetooth chip.

2. The Bluetooth headset restart circuit according to claim 1, characterized in that: The source of the NMOS Q1.2 is connected to a voltage regulator chip U1.

3. The Bluetooth headset restart circuit according to claim 1, characterized in that: The OR gate logic chip U2 is 74AHC1G32GW.

4. The Bluetooth headset restart circuit according to claim 1, characterized in that: The Bluetooth chip is AC7916A.

5. A Bluetooth headset restart circuit according to claim 2, characterized in that: The voltage regulator chip U1 is ME6211C33M5G-N.

6. A Bluetooth headset restart circuit according to claim 1, characterized in that: The button is TS-1187A-BAB.

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