AD8313 detector output with periodic pulse output

Hello Runoob,

The mobile phone signal at RF will sometimes find its way into the detector input through free space propagation. The RF input trace consisting of P2 and C3 can function as a low gain antenna and hence pickup the mobile phone signals, then the AD8313 detects the signal. The cure is better shielding of the input trace and detector circuitry.   -Bruce H. 

Hello Bruce_H

Thank you for your detailed answer. I will add a stainless steel shielding cover to the PCB board later. After testing, the pulse signal is indeed the mobile phone signal. If it is far away from my workbench, there is no such problem.

Hello Bruce_H

Thank you for your detailed answer. I will add a stainless steel shielding cover to the PCB board later. After testing, the pulse signal is indeed the mobile phone signal. If it is far away from my workbench, there is no such problem.