Pre-Amplifier for MEMS Microphone

https://www.electronics-lab.com/pre-amplifier-for-mems-microphone/

This is a low-cost, small-size audio pre-amplifier for MEMS microphone, OPAMP-based circuit amplifies the low-level analog signal coming from MEMS microphone to the desired level required for the next stage which is an audio amplifier, basically microphone level to line level. Resistor R4 and R7 are used to generate a voltage reference to bias the […]