Low noise Mini Electret Microphone PreAmplifier
- Rajkumar Sharma
The single supply microphone pre-amplifier amplifies the output signal of an electret capsule microphone to audio line levels. An op amp is used as a trans-impedance amplifier to convert the output current from the microphone in to a signal level voltage. The circuit works with 9V so it is good choice for battery operated systems.
- Supply 9V DC
- Current Approx. 3mA
- On Board Microphone
- Very thin and narrow PCB
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