what is the difference between metal oxide field effect transistor and junction field effect transistor?

Answer 1

MOSFET vesus JFET. without writing you an essay below are two websites that could sum up their definitions for you.

MOSFET:
http://www.google.com/search?hl=en&lr=&defl=en&q=define:MOSFET&sa=X&oi=glossary_definition&ct=title

JEFT:
http://www.google.com/url?sa=X&start=2&oi=define&q=http://en.wikipedia.org/wiki/JFET&usg=__Wy2w4jAiS8bevEQo4sweZ09EQFo=

Answer 2

First, the acronyms used are MOSFET and JFET. For both types, the three terminals are the gate, the source, and the drain. As its name implies, the voltage on the gate controls the amount of current that can flow in the channel between the source and the drain.

For the JFET, the gate is basically a reverse biased diode junction. Because it is a semiconductor junction, there are specific bias limitations, as well as a leakage current that must be taken into consideration.

The MOSFET, however, has a dielectric (insulator, usually glass) between the channel and the gate, instead of a junction. As a result, the input impedance of a MOSFET is nearly infinite.

Most digital microcircuits today use CMOS technology, which stands for complementary metal oxide semiconductor. Without getting technical, there are two complementary kinds of MOS transistors: N channel and P channel. A circuit configured with N and P channel MOSFETs draws essentially zero power when at rest. In fact, the power dissipated by a MOSFET is equal to:
P = CV²f
where C is the capacitance of the node, V is the voltage swing (maybe 5 volts), and f is the frequency at which it is switching. At rest, f is zero and the power is zero. A JFET circuit, however, has a finite leakage current and the power is never zero.

Answer 3

MOSFET:
http://www.google.com/search?hl=en&lr=&d...
JEFT:
http://www.google.com/url?sa=x&start=2&o...

good luck...