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Forum Post: RE: AMC1200 AMPLIFICATION PROBLEM

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Hi Varaprasad,

I have not seen any additional decoupling capacitors at the power input(VDD1, VDD2) when comparing the last two attached files.

It's good that you have changed to use a far more smaller(3.3nF) common mode capacitor. Suggest to use differential capacitor which will give you better CMRR.

Not sure why you cannot get any output with filter I suggested before, are you connecting as following or you have other connection?

Best regards,

Martin


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