1.5V-powered microphone signal amplifying circuit

  
1.5V-powered microphone signal amplifying circuit 1.V power supply shown for the microphone signal amplifying circuit, which by VT2, VT3 differential amplifier is constituted o
1.5V-powered microphone signal amplifying circuit - schematic

f the main group into a part, VT6 a common emitter voltage of the amplifier, the output signal is amplified by the collector. Input by the input signal VI2 base electrode, the collector and base of VT1 VT2 short-circuits to the base of a DC bias, VT4, VT5 the emitter resistor circuit composed of VT2, VT3 collector-bias. Use transistor may reduce the resistance power loss can be obtained the desired amplification effect.




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