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Design calculaton of LC filter for P89V51RD2FBC

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greentrees

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Dear all,

I am using P89V51RD2FBC ic for my application. I am sensing reed type limit switches as inputs to its I/O pins. As theses inputs as directly coming from the field side to input as controller i have connected LC filter in series with the input to controller to nullify the effect of any ac component. But i am unable to design the values of L and C for the same. Can any body help me with that.

Please give the guidance regarding design calculation for L and C ie which parameters would be helpful for me for getting L and C values.

regards

greentrees
 

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