A practical design problem of integrated active filter

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OMEsystem

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integrated active filter design

If I would like to design a capacitor ratio which is 1:1.17, how do I implement
it?

Thanks,
 

for active filter, it need not very accurate of the ratio.
just do as 1:1.17 is OK.
 

sunking said:
for active filter, it need not very accurate of the ratio.
just do as 1:1.17 is OK.
Click to expand...

You mean I only need to make two caps, one is 1 and another one is 1.17.
We don't need to care the the matching accuracy such as proximity effect or
others.

BTW, why we don't need good accuracy in active filter design?

thanks,
 

I think your question is how to do capacitor matching on chip.
There are several analog design book talking about this.
Please refer to analog integrated circuit design by Martin.
 

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