impedence against frequency graph

[dont know]

Hi can someone tell me how to plot an input and output impedence graph against frequency for a common emitter amplifier.?

i mean what kind of analysis to i use?

Many thanks in advance!!!

[AdnanZ]

Hi!

Hope you are doing well today! You can just use a bode plotter. Attached is a snapshot.

[EBL]

I usually connect a 1 A current source to the point where I want to measure impedance. Then the voltage at that node reads impedance directly. You can look at magnitude, phase, whatever you want vs. frequency using an ordinary frequency sweep.

Make sure all other sources are either zero or disconnected, as appropriate.

Hope this helps,
EBL