manodipan
|
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...
|