FET used as a silencer tube headphone circuit

Posted on Dec 11, 2010

FET used as a silencer tube headphone circuit Field-effect transistor is shown as a headphone circuit silencer tube. L from the digital signal processing circuit, R audio signa

FET used as a silencer tube headphone circuit
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l to the headphone jack mute control circuit, Ql, Q2 are respectively connected to the drain of the field effect transistor input line L, R signal, when the control circuit sending to the silencer when the control voltage, Ql, Q2 is turned on, the L, R signal is shorted to ground, no signal output, MP3/MP4 is in mute state.

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