A headset compatible circuit, mobile terminal and electronic system

Abstract

The invention discloses an earphone compatible circuit. The compatible circuit comprises an MIC module, a control module and an earphone interface; the detection end of the MIC module is connected with the detection end of the earphone interface, the input end of the MIC module is connected with the input end of the control module, and the MIC module is used for, when detecting that an earphone is inserted into the earphone interface, inputting a voltage signal to the control module; the control end of the control module is connected with the input end of the earphone interface, the output end of the control module is connected with the reference voltage end of the MIC module, and the control module is used for controlling the direction of current flowing to the earphone interface according to the received voltage signal and outputting a reference voltage to the MIC module; and the MIC module is further used for, when detecting the reference voltage, triggering self left and right channels to work. The invention further discloses a mobile terminal and an electronic system. Through the technical solution, the circuit can be compatible with earphones of two different standards.

Description

technical field [0001] The invention relates to the technical field of electronic circuit design, in particular to an earphone compatible circuit for a mobile terminal, a mobile terminal and an electronic system. Background technique [0002] With the rapid development of communication technology, mobile terminals such as mobile phones have more and more functions. Most of the entertainment functions that can be realized on computers can already be realized on mobile terminals. People can watch movies, play games, Browse the web, video chat, listen to music, and more. [0003] Currently, when using a mobile terminal to play music, it can usually be listened to through earphones. There are currently two standards for earphones used in mobile terminals on the market, namely national standard earphones and American standard earphones. The difference between the two is that the MIC signal and the GND signal are swapped. American standard headphones are sorted from the signal ...

AI Technical Summary

Problems solved by technology

When the earphone design standard of the mobile terminal is inconsistent with the earphone standard signal (for example, the American standard mobile terminal uses the national standard earphone, and the national standard mobile terminal uses the American standard earphone), there will be no sound when the earphone plays or the earphone volume is very low, so the user You have to replace the headset to use it normally, which affects the user experience

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