For some reason i can't get my head wrapped around how a jfet is "self biased" by the value of the resistor on the source. We are going over them at school and i can't for the life of me understand what the feedback signal is on a jfet amp circuit. -- in my mind right now, i'm seeing the ac signal flowing through the gate through the source, and the resistor determining how much signal is reintroduced into the gate through the common ground.
-and if a jfet is fully on at 0V difference between the gate and source, why does does it need to be biased at all? Wouldn't you get a positive to negative amplified output signal with essentially no load on the source resistor?
-sorry i'm not explaining it better...i'm hoping you guys get what i'm saying.....
thanks,
Mike
-and if a jfet is fully on at 0V difference between the gate and source, why does does it need to be biased at all? Wouldn't you get a positive to negative amplified output signal with essentially no load on the source resistor?
-sorry i'm not explaining it better...i'm hoping you guys get what i'm saying.....
thanks,
Mike