Simple sound listening circuit

Published:2011/6/13 9:08:00 Author:Christina | Keyword: Simple, sound listening | From:SeekIC

The simple sound listening circuit that can be used in teaching is as shown in the figure. The audio pre-amplifier circuit is composed of VT1, the two stages DC low low frequency amplifier circuit is composed of the VT2 and VT3. The L1 is the audio receiving coil, the low frequency signal which is inducted by the L1 adds to the amplifier circuit through C1 to be amplified, and the amplified signal is output by the headset. The RP1 can be used to adjust the volume. Figure The simple sound listening circuit



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