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Line Filter Design for Digital Circuit

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amar:
Hi .. please suggest me how to design a Line filter for digital circuit to avoid  EMI and RFI.
I know .1uf caps helps a lot but i want to learn more better filteration

c4757p:


$2.84.

Why bother?

amar:
thats better solution
but i am using SMPS for Digital circuit .. any suggestion for LC filter

c4757p:
You mean on the output of the SMPS?

amar:
no ... for microcontroller

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