Hi;

How do I determine the output impedance of a common source (or other JFET) amplifier? I know that it is roughly 1/gms, but how do you deal with the units? E.g., if a certain JFET has a gms of 5000 uS, the output Z would be

0.0002, but surely that's not ohms is it? Or do you divide out the micro and get an answer of 200 ohms?Thanks