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Share Insights: Differential Impedance for an OPAMP

IshaS

You want to characterize how an OPAMP’s differential input impedance changes with frequency. 

Which PSpice setup is most appropriate?

A. Use a 1 A AC current source across the differential input, perform an AC frequency sweep, and evaluate Vdiff/IAC 


B. Apply a DC voltage source and perform Transient analysis


C. Run a DC Sweep and plot the output voltage only


D. Apply a sinusoidal source and calculate only the voltage gain

Try this and share your observations.
Happy Learning!

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