CCS/TLV320ADC3101: screaming problem

hello xcds xzc,

I'm not familiar with "the screaming problem", would you please elaborate?

best regards,
-Steve Wilson

Sounds transmitted through loudspeakers are reflected back，Time and time again

and It caused a scream.

xcds xzc,

Sounds like you are talking about positive feedback? There are many ways of dealing with positive feedback, typically this is done at a system level and not at an ADC level. Perhaps you can tell me more about your specific application, and how you are using the ADC3101?

best regards,
-Steve Wilson

yes,it's positive feedback.
Amplification factor of power amplifier is too large.

so,I want to use AEC ，But that seems impossible.

I just use TLV320ADC3101-K EVM and Power amplifiers
I Input sound from microphone and I set the output audio format to I2S，PGA=20dB