Audio mic AGC circuit before codec

[ahgu]

audio agc circuit

Does anyone has a simple yet effective AGC for MIC amplification before the signal goes to the codec?

I don't want the signal to saturate, but amplify about 30-40dB if possible for weak signals.

thanks
ahgu

 

[ME]

mic agc

You can use the SSM2165, SSM2166 or SSM2167 Microphone Preamplifier with Variable Compression and Noise Gating from Analog Devices.

 

[usbman]

simple agc circuit

Does anyone has a simple yet effective AGC for MIC amplification before the signal goes to the codec?

I don't want the signal to saturate, but amplify about 30-40dB if possible for weak signals.

thanks
ahgu

you may check the INA163 datasheet form BurrBrown/TI. The datasheet
contains some mic examples, but no AGC.

usbman

 

[Hishamsaleh]

agc circuit

**broken link removed**

 

[ME]

microphone agc

There is no compressor function in the circuit you linked to Hishamsaleh.

 

[ahgu]

microphone agc circuit

I found one, working very nice.

 

[nyk]

Can u post that circuit that worked for you? PLz... ahgu