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ADL 5391 input problem

Question asked by shaohuaa on Mar 11, 2018
Latest reply on Mar 12, 2018 by shaohuaa

The chip is now  working OK .I use the PWM modulation wave through the RC filter, become a sine signal, input to YPLS single-end input. The input signal can not be detected at the input end of the multiplier while it is working. The input of PWM modulation signal can be detected by removing the RC part, and WPLS output is correct.

Why is this happening?how to solve it