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What type of topology for my OP AMP filter???

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eltonjohn

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Hi guys .. is easy to see that analog is NOT MY BREAD ... (Topology what am i thinking??) .. I need an analog circuit using an OP AMP rail to rail single supply 3V
i've been thinking to use a MCP601 .. i need a diferential filter with a cutt off freq of 70khz .the signal i need to filter has a DC component ( well between +3 and -3 V) so i need to recover this component but block all the high frequency signal .
All in one op diferential OP amp !
Any sugestions ??
 

From TI as well- a simple EXEL program for LPF:

**broken link removed**
 

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