Electronic device powered through earphone interface and earphone power line
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United States of America Patent
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Nov 24, 2015
Grant Date -
Jul 31, 2014
app pub date -
Apr 19, 2013
filing date -
Jan 30, 2013
priority date (Note) -
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Abstract
An electronic device receives power through an earphone interface, and includes the earphone interface, a processing unit, an audio codec chip, a first switch and a second switch. The earphone interface includes a left channel pin, a right channel pin, a ground pin and a microphone pin. The first switch includes a first normally closed terminal, a first normally open terminal, a first common terminal and a first controlled terminal The second switch includes a second normally closed terminal, a second normally open terminal, a second common terminal and a second controlled terminal. The processing unit includes a detect pin and a switch control pin. An earphone power line to power the electronic device is also provided.
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