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On paper you can measure the input impedance of an amplifier circuit by attaching a voltage source to the input, shorting the output, and calculating the resulting impedance from the voltage and cu...
#1: Initial revision
by
jm567
·
2021-02-25T17:10:38Z (about 3 years ago)
Measuring Input/Output Impedance with a VNA
On paper you can measure the input impedance of an amplifier circuit by attaching a voltage source to the input, shorting the output, and calculating the resulting impedance from the voltage and current, or vice versa to find output impedance. But how would I measure the Input/Output impedance of the amplifiers in the pictures below using a VNA? Do I just connect the VNA to the input, attach a short sma connector to the output, and then observe the smith chart? I don't want to destroy my instruments that's why I'm asking. Thanks. 