Tag: OPA172IDBR
![Low noise Mini Electret Microphone PreAmplifier Low noise Mini Electret Microphone PreAmplifier](https://www.electronics-lab.com/wp-content/uploads/2016/09/IMG_5973.jpg)
Low noise Mini Electret Microphone PreAmplifier
This 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 into a signal-level voltage. The circuit works with 9V so...
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