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Active Low Pass Filter, finding the s-domain transfer function.

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Peter222

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I have been trying to learn how to get the s-domain transfer function from first principles for the circuit shown on this web page

**broken link removed**


and then the frequency response..

The answers are on the web page but would it be possible for someone to explain how you get the transfer function from first principles?

thanks
 

If you know KCL andKVL and use 1/(Cs) for the impedance of capacitors and assuming that the two ports of Op-amps have the same potential and the input ports of op-amp do not draw current, then easily you can find the H(s) of the filter and then for frequency response, just substitue s=jw and find |H(jw)|.
 

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