Audio Noise cancelling LC823450 from ON Semiconductor. Link here (PDF)
This application note describes the performance of Noise Canceller of LC823450 Series. The customer can improve of audio characteristics by using this canceller. Its function can be used for various products such as Wireless headset, Earbads, Wireless speaker or IC−recoder.
from Dangerous Prototypes https://ift.tt/2Ebyqb8