Earphone wire control circuit of mobile terminal and wire control method



The invention discloses an earphone wire control circuit of a mobile terminal and a wire control method. The earphone wire control circuit comprises an earphone end circuit and a mobile terminal end circuit connected through a signal wire, wherein the earphone end circuit comprises an earphone end MCU (Micro Control Unit) and an attenuation and microphone circuit which are connected; the mobile terminal end circuit comprises an audio frequency analog input channel and an amplifier which are connected in parallel; the amplifier is connected with a mobile terminal end MCU through a wire; the mobile terminal end MCU is connected with a CPU (Central Processing Unit) of a processor through a wire; and the earphone end MCU is internally provided with a button detection module and a PWM (Pulse Width Modulation) module. The problem that POP noise is generated when buttons are pressed during the calling process is effectively solved, and the calling quality is promoted.




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Cited By (5)

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    CN-104159173-ANovember 19, 2014宇龙计算机通信科技(深圳)有限公司Earphone, earphone application method, earphone control method and device as well as mobile terminal
    CN-105187963-ADecember 23, 2015青岛歌尔声学科技有限公司Microphone noise suppression circuit and method
    US-9654859-B2May 16, 2017Guangdong Oppo Mobile Telecommunications Corp., Ltd.Mobile terminal earphone line control circuit and line control method
    WO-2014180287-A1November 13, 2014广东欧珀移动通信有限公司Mobile terminal earphone line control circuit and line control method
    WO-2015074607-A1May 28, 2015加一联创电子科技有限公司Earphone drive-by-wire device and earphone