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I had difficulty in evaluating following circuit's node analysis to find the transfer function. I had difficulty because of the ground in the middle of the circuit and the way the source voltage is attached to circuit. I would be very happy if you can show how i should evaluate the node equations. Thank you very much.enter image description here

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An RC twin T circuit like this will generally have the transfer function: -

enter image description here

For the circuit below: -

enter image description here

Even with R1 = R2 etc it's by no means a simple thing you are asking so I would say to you this...

Here's the answer (above) and it can be simplified to give the desired answer in your question, but where are you getting stuck i.e. how far have you got with solving this?

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