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This circuit is a mono pre amp circuit, which can be used with a variety of inputs.Can be applied for extending the phone and the other with
When AF IN input signal to pin 3 of IC1, and The voltage input to pin 2 of IC1.The IC number LM741 used to amplifier circuit,Output at Pin 6.
And access to the AF OUT to be applied to various tasks.VR1 is adjusted by the strength of the output signal sent to the AF OUT.

uA741组成的前级放大器电路(点击图片看原图)

关键词： 电路 组成 to the of circuit be