BoopathiS
Member level 2
Hi,
N channel MOSFET Saturation operation condition is Vds > (Vgs - Vth).
But in saturation region, MOSFET will act like closed switch. hence Vds is approximately 0V(Rds*I). Examble VGS = 10V and VTH is 2V, and if switch is closed means VDS= 0V, but above formula is not satisfied.
Anyone kindly clarify this ?
And How to drive the N channel MOSFET to act as variable resistor ?
I saw the condition Vds < (Vgs -Vth), but how to calculate Vgs for required resistor ?
N channel MOSFET Saturation operation condition is Vds > (Vgs - Vth).
But in saturation region, MOSFET will act like closed switch. hence Vds is approximately 0V(Rds*I). Examble VGS = 10V and VTH is 2V, and if switch is closed means VDS= 0V, but above formula is not satisfied.
Anyone kindly clarify this ?
And How to drive the N channel MOSFET to act as variable resistor ?
I saw the condition Vds < (Vgs -Vth), but how to calculate Vgs for required resistor ?