JFET Types Junction field effect transistors

JFET Types

Two types of JFETs:

– n-channel and p-channel.

In n-channel JFET, a –ve voltage applied @ its gate (with VG < VS) reduces current

flow from drain to source. It operates with VD > VS.

In p-channel JFET, a +ve voltage applied @ its gate (with VG > VS) reduces current

flow from source to drain. It operates with VS > VD.

JFETs have very high input impedance and draw little or no input current

– o if there is any circuit/component connected to the gate of a JFET, no current is drawn away from or sunk into this circuit.