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  • in reply to: PIC16f877A resets due to external noise #1433
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    Just connecting everything to a ground net would be fine if nothing has any ground current. Of course various parts do. This current times the impedance back to the one point you get to call ground causes a offset voltage. Don’t just think of ground in terms of DC. DC is the easy part. Consider the series inductance of any connection and then the high frequency ground return currents that run accross that connection.

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