Mobile terminal earphone line control circuit and line control method
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United States of America Patent
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May 16, 2017
Grant Date -
Mar 17, 2016
app pub date -
May 5, 2014
filing date -
May 8, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
An earphone wire control circuit and wire control method for a mobile terminal. The wire control circuit includes a circuit in the earphone and a circuit in the mobile terminal which are coupled via a signal wire. The circuit in the earphone includes a micro controller unit and an attenuation and microphone circuit coupled to the micro controller unit of the earphone. The circuit in the mobile terminal includes an audio analog input channel and an amplifier which are coupled in parallel. The amplifier is coupled to a micro controller unit of the mobile terminal via a wire. The micro controller unit of the mobile terminal is coupled to a central processing unit of the mobile terminal via a wire. The micro controller unit of the earphone includes a button detection module and a pulse-width modulation module.
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