Low Impedance Microphone Amplifier Electronic Circuit Diagram

Low Impedance Microphone Amplifier Electronic Circuit Diagram

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On: 13 Jun, 2016

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This is the circuit diagram of low impedance microphone amplifier. The circuit designed for use with low impedance (~200 ohm) microphones. It will work with regulated voltages between 6-30VDC. If you don’t build the impedance adapter part wi...

This is the circuit diagram of low impedance microphone amplifier. The circuit designed for use with low impedance (~200 ohm) microphones. It will work with regulated voltages between 6-30VDC. If you don’t build the impedance adapter part with T1, you get a microphone amplifier circuit for higher impedance microphones. In this case, you should directly connect the input signal to C7 (bypass the TI transistor).

low impedance microphone amplifier 1.gif

low impedance microphone amplifier 2.gif

low impedance microphone amplifier 3.gif

Parts
R1=15k
R2= 150k
R3= 2k2
R4= 820
R6= 10k
R7= 10k
P1= 1M
C1= 3k9
C2= 100u
C3= 22u
C4= 4u7
C5= 470u
C6= 10u
C7= 100n
C8= 47u UNIPOLAR
D1= 1N4148
U1= TL081
CN1= SIL6

 

R1=15k C1= 3k9 U1= TL081 R2= 150k C2= 100u D1= 1N4148 R3= 2k2 C3= 22u CN1= SIL6 R4= 820 C4= 4u7 R6= 10k C5= 470u R7= 10k C6= 10u P1= 1M C7= 100n C8= 47u UNIPOLAR

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