I have a mosfet trying to drive an LED. I have 2 different configuration as shown.
Why isn't the current through the resistor the same when connections are interchanged.
hi,
Consider the actual Vgs voltage in the two cases.
In the M1 case the full V1 appears across the Gate to Source junction.
In the M2 case Vgs is reduced from V1 by the voltage drop across the Source resistor and LED.
E