Three techniques for current measurement for FET
- Add a series resistor to drain and probe its current
- Add a 0V voltage source, and probe its current. This is a common technique in spice (+ve current direction represent current flow from + to - within the voltage source, i.e. +I(Vd) flow downward in this example)
- In waveform viewer, Ctrl+A, select Id(M1) to add drain current for M1.
