转接电路、转接头及电子设备

Abstract

一种转接电路、转接头及电子设备，属于电子电路技术领域，通过控制电路接入终端设备的通信端输出的复合信号，并根据启动电压上电，且响应于第一握手信号输出使能信号和问询信号；复合信号包括启动电压和第一握手信号；音频处理电路响应于使能信号唤醒自身，并将终端设备的音频端输出的第一音频信号转换为第二音频信号，以使播放模块根据第二音频信号进行播放；电源设备响应于问询信号，输出充电直流电，以对终端设备进行充电；从而同时实现了音频播放和充电功能；而且，使得音频处理电路仅在接入终端设备的情况下唤醒工作，节约了电能。

Claims

1. A switching circuit, characterized by Connects to terminal devices, power supply devices, and playback modules, including: A control circuit, connected to the first communication terminal of the terminal device and the power supply device, is used to receive the composite signal output by the first communication terminal of the terminal device, power on according to the start-up voltage, and output an enable signal and an inquiry signal in response to the first handshake signal; the composite signal includes the start-up voltage and the first handshake signal; An audio processing circuit, connected to the control circuit, the audio terminal of the terminal device, and the playback module, is used to wake itself up in response to the enable signal and convert the first audio signal output by the audio terminal of the terminal device into a second audio signal so that the playback module plays according to the second audio signal; The power supply device is configured to output charging DC power in response to the query signal to charge the terminal device.

2. The transit circuit of claim 1, wherein, The power supply terminal of the terminal device is connected to the control circuit and the audio processing circuit. The control circuit is also configured to output a second handshake signal in response to the first handshake signal; The terminal device is also configured to respond to the second handshake signal by outputting a power supply voltage from its own power supply terminal to power the control circuit and the audio processing circuit.

3. The interface circuit of claim 1, wherein The playback module includes a microphone; The microphone is connected to the audio processing circuit and is used to output a voice signal based on the received sound. The audio processing circuit is also used to convert the voice signal into a third audio signal and output the third audio signal to the audio terminal of the terminal device.

4. The interface circuit of claim 1, wherein The playback module includes a button module; The button module is connected to the audio processing circuit and is used to output button signals according to the operation. The audio processing circuit is specifically used to wake itself up in response to the enable signal, and to convert the first audio signal output by the audio terminal of the terminal device into a second audio signal based on the button signal, so that the playback module plays according to the second audio signal.

5. The interface circuit of claim 1, wherein The communication terminal of the audio processing circuit is connected to the second communication terminal of the terminal device; The audio processing circuit is specifically used to wake itself up in response to the enable signal, and to perform mutual authentication with the terminal device through its own communication terminal. After successful authentication, it converts the first audio signal output by the audio terminal of the terminal device into a second audio signal so that the playback module plays according to the second audio signal.

6. The transit circuit of claim 1, wherein, Also includes: The first interface is connected to the power supply device and the control circuit, and is used to transfer the query signal and the charging DC power. The second interface is connected to the terminal device, the first interface, the audio processing circuit, and the control circuit, and is used to transfer the first handshake signal, the first audio signal, and the charging DC power. The third interface is connected to the playback module and the audio processing circuit, and is used to transfer the second audio signal.

7. The transit circuit of claim 1, wherein, The audio processing circuit includes an audio playback processor, a first capacitor, and a first resistor; The left channel digital-to-analog converter and the right channel digital-to-analog converter of the audio playback processor together constitute the audio signal output terminal of the audio processing circuit, which is connected to the playback module to output the second audio signal. The left output terminal of the video output buffer of the audio playback processor constitutes the auxiliary output terminal of the audio processing circuit and is connected to the playback module. The first analog-to-digital converter terminal, the first terminal of the first capacitor, and the first terminal of the first resistor of the audio playback processor are connected and together constitute the voice signal input terminal of the audio processing circuit, which is connected to the microphone and the button module to receive voice signals and button signals. The positive microphone terminal of the audio playback processor is connected to the second terminal of the first capacitor, the power supply terminal of the input / output port of the audio playback processor is connected to the second terminal of the first resistor, and the ground terminal of the digital-to-analog converter of the audio playback processor and the ground terminal of the electronic pin of the audio playback processor are both connected to the power supply ground. The general-purpose input / output terminals of the audio playback processor constitute the enable signal input terminal of the audio processing circuit and are connected to the control circuit to receive the enable signal. The transmitting end of the audio playback processor constitutes the first authentication signal output end of the audio processing circuit, and is connected to the terminal device to output the first authentication signal; The receiving end of the audio playback processor constitutes the second authentication signal input end of the audio processing circuit and is connected to the terminal device to access the second authentication signal; The positive USB terminal and the negative USB terminal of the audio playback processor together constitute the audio terminal of the audio processing circuit, which is connected to the terminal device to receive the third audio signal and output the first audio signal. The battery terminal VBAT of the audio playback processor U1 constitutes the power supply terminal of the audio processing circuit and is connected to the terminal device and the control circuit to access the power supply voltage. The communication terminal of the audio processing circuit includes a first authentication signal output terminal and a second authentication signal input terminal.

8. The transit circuit of claim 1, wherein, The control circuit includes a microprocessor and a second capacitor. The power supply terminal of the microprocessor is connected to the first terminal of the second capacitor, and the ground terminal of the microprocessor and the second terminal of the second capacitor are both connected to the power ground. The first general-purpose input / output terminal of the microprocessor constitutes the first output terminal of the control circuit and is connected to the audio processing circuit to output the enable signal; The second general-purpose input / output terminal of the microprocessor constitutes the second output terminal of the control circuit and is connected to the power supply device to output the query signal; The third general-purpose input / output terminal of the microprocessor constitutes the power supply voltage input terminal of the control circuit, and is connected to the terminal device and the audio processing circuit to access the power supply voltage; The fourth general-purpose input / output terminal of the microprocessor constitutes the first input / output terminal of the control circuit, and is connected to the power supply device to receive the composite signal and output the second handshake signal.

9. An adapter, characterized in that The adapter includes the adapter circuit as claimed in any one of claims 1 to 8.

10. An electronic device, comprising: The electronic device includes the adapter circuit as claimed in any one of claims 1 to 8.

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