Explain about junction fet, Electrical Engineering

Assignment Help:

Q. Explain about Junction FET?

The JFET is a three-terminal, voltage-controlled current device, whereas the BJT is principally a three-terminal, current-controlled current device. The advantages associated with JFETs are much higher input resistance (on the order of 107 to 1010 ), lower noise, easier fabrication, and in some cases even the ability to handle higher currents and powers. The disadvantages, on the other hand, are slower speeds in switching circuits and smaller bandwidth for a given gain in an amplifier.

Figure shows the n-channel JFET and the p-channel JFET along with their circuit symbols. The JFET, which is a three-terminal device, consists of a single junction embedded in a semiconductor sample.When the base semiconductor forming the channel is of a n-type material, the device is known as an n-channel JFET; otherwise it is a p-channel JFET when the channel is

formed of a p-type semiconductor. The functions of source, drain, and gate are analogous to the emitter, collector, and base of the BJT. The gate provides the means to control the flow of charges between source and drain.


Related Discussions:- Explain about junction fet

Find the line current and voltage across the load, Q. (a) A balanced wye-co...

Q. (a) A balanced wye-connected load with per-phase impedance of 20 + j10 is connected to a balanced 415-V, three-phase supply through three conductors, each of which has a series

What is polymerised resultant of phenol and formaldehyde, Phenol and Formal...

Phenol and Formaldehyde are polymerised to a resultant product known as (A) PVC.                                  (B) bakelite. (C)  Polyester.                        (D)

Determine the value of resistance, Determine the value of Resistance: ...

Determine the value of Resistance: Determine the value of R, so that the condition for resonance is fulfilled Figure Solution Admittance of first branch

Inference rules of explanation system, Inference Rules of Explanation syste...

Inference Rules of Explanation system How an Explanation System might work where questions like how or why are dealt with. Inference Rules use an if-statement and a then-statem

Demultiplexer, How can i build 1-16 DEMUX using 1-8 DEMUX with logic gates ...

How can i build 1-16 DEMUX using 1-8 DEMUX with logic gates only ?

Name 5 different addressing modes, The five addressing modes are given belo...

The five addressing modes are given below: Immediate, Register, Direct, Implied addressing modes           Register indirect,

Engineering drawing, connect two given points A and B by a parabolic curve ...

connect two given points A and B by a parabolic curve when OA=60mm,OB=80mm and angle AOB=110 degree

Hexadecimal number system, Hexadecimal Number System Similar  to octal ...

Hexadecimal Number System Similar  to octal number hexadecimal number system is also used to represent long  binary  numbers in  smaller  form. In microprocessor  we use  hexad

Determine the number of bits of a natural binary encoder, Determine the num...

Determine the number of bits of a natural binary encoder that works with the quantizer: a) If the extreme levels are ±3.1 V, with a step size of 0.2 V. (b) If there are 128 q

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd