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Dynamic microphone amplifier

2015-01-02 00:45  
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This dynamic microphone amplifier circuit has a total gain of 200 times. If we use 200Ω microphones R4 must be 220Ω and C1 is 4.7uF. If you want the to get the lowest noise signal from this dynamic mic amplifier use metalic resistors for R3 .. R6 and for C1 use more MKM capacitor in parallel connection.
Some specification: with a 3mVpp input signal the output was 800mVpp. The maximum output voltage was 10Vpp when the input is 50mVpp. The frequencies domain is between 50Hz and 100KHz.

Dynamic microphone amplifier circuit diagram


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