I'm a little bit confused on the Vgs(voltage-gate-source) of a mosfet…from what i understand so far the Vgs is simply the potential difference of the voltage applied from gate to source…
FOR EXAMPLE:
using a p-channel mosfet
assume that Vg=10 volts and my Vs=18 volts
so i get a VGS= -8
using a n-channel mosfet
assume that Vg=10 volts and my
Vs=0 (vs is always 0 since the source is at the ground level)
so i get a VGS= 10
i hope someone will clear this confusion of mine…TIA
Best Answer
You didn't really ask a question but I can state that what you said all sounds correct except that N-channel mosfets do not have to have the source attached to ground. Often times they will be used as a high side switch with some kind of driving/bootstrap circuit to elevate the gate over whatever drain voltage is being controlled.