Re: Why bandwidth and ac respones is different for Vpulse and Vsin as input in GmC fi
Sounds like a useless setup. Bandwidth respectively ac response is defined for sine input signals, not square wave.
Usually AC response is determined for small signal, e.g. using AC analysis of a circuit simulator (with VAC source). A large signal transient analysis can be performed with different waveforms (e.g. VSIN or VPULSE), but usual power bandwidth measurements are also using sine. If you feed a square wave to the filter, the output waveform isn't a square wave in the general case, how would you determine the gain then? Each spectral component of the square wave is amplified with different gain and phase.