Current flow through the channel of a jfet after pinch off, Electrical Engineering

Assignment Help:

Q. How does current flow through the channel of a JFET after pinch off?

It is seen that above the pinch off voltage at a constant value of VDS (saturation drain current, ID increases with an increase of VGS (gate voltage). Hence, a JFET is suitable for use as a voltage amplifier, similar to a transistor amplifier.

Even at VDS=VP (pinch off voltage), the drain current is not reduced to zero. If the drain current is to be reduced to zero, the ohmic voltage drop along the channel should also be reduced to zero. Further, the reverse biasing to the gate source PN junction essential for pinching off the channel would also be absent.

The drain current ID is controlled by the electric field that extends into the channel due to reverse biased voltage applied to the gate; hence, this device has been given the name Field Effect Transistor.


Related Discussions:- Current flow through the channel of a jfet after pinch off

Enhancement type mosfet, Enhancement type MOSFET In these types of de...

Enhancement type MOSFET In these types of devices operate by comprising a channel enhanced in the semiconductor material in which no channel was constructed, they are termed

Describe the uses of GPS map, Describe the uses of GPS map This is far...

Describe the uses of GPS map This is far safer because a driver of a vehicle doesn't have to consult maps while driving. It also removes error (for example going the wrong way

In what way is program control superior to wired control, Q. Classify switc...

Q. Classify switching systems. In what way is stored program control superior to hard wired control? Ans: Classifications of switching systems are givenin block diagram belo

Important function of common control subsystem, Q. Important function of co...

Q. Important function of common control subsystem? If a call is destined to a number in an exchange other than present one processing the digits, initial translator generates t

Charge variation with time, Q. A charge variation with time is given in Fig...

Q. A charge variation with time is given in Figure. Draw the corresponding current variation with time.

What digits are represented by the signal, A signal stands for 0110 with po...

A signal stands for 0110 with positive logic in which low stands for 0 and high stands for 1. If negative logic (in which low stands for 1 and high stands for 0) is used, what digi

Magnetic field in the core, We can use Ampere's Law to calculate the magnet...

We can use Ampere's Law to calculate the magnetic field in the core.

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