Because the insulation between the gate and the channel is only a reverse biased PN junction. If this junction were to become forward biased the jfet would no longer operate as a transistor at those times.
Its a Transistor used in JFET (Junction Field Effect Transistor)
The BJT is the bipolar junction transistor, the PCT is the point contact transistor, the UJT is the uni-junction transistor, the SBT is the surface barrier transistor, the FET is the field effect transistor, the GJT is the grown-junction transistor, the AJT is the alloy-junction transistor, and the DFT is the drift field-junction transistor.
Junction Field Effect Transistor are classified as hi impedance devices
No. The Field Effect Transistor is a different technology than the Bipolar Junction Transistor. That cannot substitute for one another.
BJT is Bipolar junction transistor FET is Field effect Transistor It is a current controlled device It is voltage controlled device
MOSFET is Metal Oxide Semiconductor Field Effect Transistor. IGFET Insulated Gate Field Effect Transistor. But these expressions are practically synonyms.
An ordinary junction transistor consists of two junctions. In effect a variation of the base to emitter current influences the reverse leakage current at the base to collector junction. The base being common to both junctions. A Field Effect Transistor uses an electric field to narrow the conductive channel thus varying its resistance. A FET has an extremely high input resistance compared with that of a standard junction transistor.
A Jfet stands for junction field effect transistor. It is a transistor also known for being the simpleist field effect transistor. The basic construction contains has three parts the P-type input the n-type input and a depletion layer.
It can be either a Bipolar Junction Transistor (NPN or PNP) or a Field Effect Transistor (N channel JFET, P channel JFET, N channel MOSFET, or P channel MOSFET).
Field Effect Transistors (both JFET & MOSFET) are unipolar because they use only one type of current carrier (electrons in N-channel or holes in P-channel), unlike bipolar transistors (both junction & the obsolete point contact) which always use both types of current carriers.
It's a junction gate field effect transistor that has it's bandwidth tuned to operate (amplify) in the radio frequency range.
No.Di, or bi, means two. A diode, from the Greek di (two), and ode (path), has, rather obviously, two connections, which, in older ones (valves/thermionic diodes), were called electrodes.A transistor has three connections (so it would make, at least grammatic, sense to call it a triode).