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low-pass active filter

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rampat

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Can u plz explain the following circuit..how this ckt acts for the two i/p signals separately and wen both i/p are present..?
 

The circuit around U2 acts like a low pass filter. V1+V2 are summed to U2.

V1 acts like a bandpass filter.

So V1 only is V1 with a DC attenuation of 1/5 (R4/(R6+R3) + band pass + low pass
So V2 only is V2 with a DC amplification of 2 (R4/R7) + low pass

Total is V1*0.8 +V2*2 . (for DC)

For AC : ((V1*0.8*bandpass)+V2)*2*low pass)
 

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    rampat

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