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FCC conducted emissions/power supply

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difflvl

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fcc conducted emissions

Hi,

Im using a AC to DC adapter. I then have a voltage regulator on my PCB. I did have some issues with conducted emissions however I just barely managed to pass using a linear AC to DC adapter rather than a switching.

My question is, can anyone recommend some power supply filters that I can place on my board ? The noise was coming off my board, using a better AC-DC adapter helped but didn't solve the problem.

So Im thinking I need to use some filters on my PCB. Any PDFs?

Thanks
 

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