Hi friends,
In switched capacitor circuits ,DFT of impulse response gives some idea about the frequency response.I have some doubt about the simulation that i have set up.
My switched capacitor circuit works at 10MHz clock,the input impulse should be sampled once,so i have kept it on for 110ns>one clock cycle.Then i have got the output response run over let say 10us.Now i take DFT of output ,i have done DFT using rectangular window with 64 points over 10us.Now i have continuous time version of the circuit from which i have got capacitor values for SC circuit.
Now in DFT of output i observe some lowering of gain at DC which is not proper.
What sort of window,no. of points to be chosen for some frequency resolution??Thanks in advance...

Hi Paancho,
What width of impulse is to be taken??can u refer some literature on compensating this hold output of SC filter??