How do you measure the input impedance of a transistor with LTSpice?
Consider the following circuit:
The above just biases a transistor so that the collector is 1/2 the supply. I used a current source with 1A AC. I then plotted the voltage at the base divided by the current at the base because we all know R = V/I.
So from this plot it looks like it's about 2.9K. Is this correct?
Although the impedance depends on the bias. Obviously with the bias high enough the impedance of the transistor is 0 - it's just a diode. Right?