Audio signal transmission device and electronic equipment

Abstract

The embodiment of the invention discloses an audio signal transmission device and electronic equipment. The device comprises an isolation circuit, a step-down circuit, a microphone and a coupling circuit, wherein an input end of the isolation circuit is electrically connected with a power supply channel of a power supply signal, and used for isolating an interference signal included in the input power supply signal to obtain a standard voltage signal; an input end of the step-down circuit is electrically connected with an output end of the isolation circuit, and used for adjusting the input standard voltage signal into a standard step-down signal matched with the microphone; a power input end of the microphone is electrically connected with an output end of the step-down circuit, and usedfor acquiring sound under the triggering action of the input standard step-down signal and converting sound into a speech signal; and an input end of the coupling circuit is electrically connected with an output end of the microphone, and used for outputting the coupled and received speech signal to the power supply channel of the power supply signal. Through adoption of the audio signal transmission device in the embodiment of the invention, the anti-interference ability of audio signal transmission can be enhanced.

Description

technical field [0001] Embodiments of the present invention relate to circuit technology, and in particular to an audio signal transmission device and electronic equipment. Background technique [0002] With the development of science and technology, the demand for voice interaction functions of smart devices is increasing, such as in smart homes, smart terminals and other fields. [0003] At present, the demand for miniaturization and integration of smart devices is high, and the space for placing smart devices is small. At the same time, smart devices have multiple functions. Therefore, in this environment, the number of wiring harnesses, the cost of wiring harnesses, and volume Higher requirements. In this scenario, the audio signal is transmitted through a step-down circuit to provide a microphone (Microphone, MIC) with a voltage that matches the MIC, and at the same time, the audio signal is coupled to a DC power signal for output. However, this kind of transmission c...

AI Technical Summary

Problems solved by technology

However, this kind of transmission circuit cannot solve the interference problem caused by the multi-line and dense power line layout to the audio signal when the audio signal is superimposed on the DC power supply, and the output audio signal is too large to interfere with the normal operation of the MIC, resulting in the failure of the MIC. The output is abnormal, so the amplitude of the audio output is very small, the anti-interference ability is poor, and it cannot meet the requirements for high-amplitude audio signals

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