Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
That is true but you are still talking about the transistor as if it is operating in the linear/saturation region. The transistor is fully on with the operating point being very near the origin on the characteristic curve graph. At that point the Vds is determined by the Rds(on) (from the transistor data sheet), and the current through Q1, as determined by the value of R1 (it's acting as a switch with Vds likely less than 1V).......................
When Control voltage is high: Q2 on, Q1 on.
for Q1: Vgs=-9V, Vds<-3V. My understanding is that for Pfet in saturation, abs(Vds)>abs(Vgs-Vth), assuming Vth=-4V, is this correct? I admit this is getting a little confusion for me.
If you use the transistor to vary the current flow and it's not be used as a switch, then it is operated in the saturation or triode region. This includes many types of linear circuits, such as linear current regulators, linear amplifiers (current or voltage, AC or DC), active load banks, etc.Thanks, I really appreciate your help.
I still wonder under what applications, fets are biased in saturation, as current sources or as large loads?