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I have this circuit:

enter image description here

I want to find the input impedance \$R_in\$ with a PSPICE simulation. I'm not sure how to go about this.

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    \$\begingroup\$ If Vin and Iin are in phase, then Rin = Vin / Iin. Otherwise Rin = Vin / Iin * cos(theta) where theta is the phase difference between Vin and Iin. Cos (theta) is also known as the power factor. The complex impedance has a magnitude of Vin / Iin and its angle is theta. \$\endgroup\$
    – user57037
    May 30, 2022 at 18:08
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    \$\begingroup\$ Do an AC Analysis and just calculate Zin= v(Vin) / i(C1) if you use a capacitor at input. So, you get the input complex impedance versus frequency. \$\endgroup\$
    – Antonio51
    May 30, 2022 at 19:05

1 Answer 1

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Do an AC Analysis;
Just calculate \$Zin= v(Vin) / i(C1)\$

enter image description here

Made with microcap v12, spectrum-soft.

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