[SOLVED] Op-amp input capacitance simulation

[erikl]

But why want me to do the transient simulation ?, f(-3dB) is coming from the A.C analyses .

Sure, AC analysis will work with the f_-3dB method. But a transient analysis would work, too: by determining the RC rise/fall time constant resulting from steep input edges (ideal square wave input with appropriate low frequency).

 

[Junus2012]

thank you once again guys
have a nice night
Regards