Hi-End Microphone Preamplifier with Variable Compression, Noise Gating and Adjustable Gain

https://www.electronics-lab.com/project/hi-end-microphone-preamplifier-with-variable-compression-noise-gating-and-adjustable-gain/

The circuit shown here is a complete microphone signal conditioning system based on a single SSM2166 integrated circuit. Designed primarily for voiceband applications, this integrated circuit provides amplification, RMS detection, limiting, variable compression, and downward expansion. An integral voltage-controlled amplifier (VCA) provides up to 60dB of gain in the signal path with approximately 30kHz bandwidth. […]