Low noise microphone preamp for PC

264

03:06:02

Cure for the horribly noisy microphone input of some PC mainboards. Amplification 30 dB, optimized for low noise. Uses power from an USB socket (5V). Provides supply voltage for typical electret microphones.
The 390kOhm resistor may need adjustment in reality as the simulator has BE voltages at low currents wrong.

published 8 years ago

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