Depletion zone in p-n junction, Electrical Engineering

Assignment Help:

Depletion Zone in P-N Junction

The power of the depletion zone electric field gets increases as the reverse-bias voltage increases. One time the electric field intensity increases further than a critical level, the p-n junction depletion zone breaks-down and current starts to flow, generally by either Zener or avalanche breakdown processes. Both of these types of breakdown processes are non-destructive and are reversible, so long as the amount of current flowing does not reach levels which cause the semiconductor material to overheat and cause thermal damage.

This effect is employed to one's advantage in zener diode regulator circuits. Zener diodes have a specific - low - breakdown voltage. A standard value for breakdown voltage is for example 5.6V. The meaning of this is that the voltage at the cathode can never be more than 5.6V higher than the voltage at the anode, since the diode will break down - and therefore conduct - if the voltage gets any higher. This efficiently regulates the voltage over the diode.


Related Discussions:- Depletion zone in p-n junction

Draw circuit diagrams and show polarity markings, Q. Two single-phase trans...

Q. Two single-phase transformers, each rated 2400: 120-V, are to be interconnected for (a) 4800:240- V operation, and (b) 2400:120-V operation. Draw circuit diagrams and show polar

Illustrate the basic working of modem, Q. Illustrate the basic working of M...

Q. Illustrate the basic working of Modem? Modem: Modems are generally provided by network operators or by vendors who aren't necessarily the manufacturers of computer systems.

What is the colour of the light emitted from the led, Question: a) Des...

Question: a) Describe five advantages of LED lighting over conventional incandescent lighting. b) State two impairments that reduces the radiant flux of a surface-emitting

Find imax and imin, Q. (a) In the circuit shown in Figure the zener diode (...

Q. (a) In the circuit shown in Figure the zener diode (with zero zener resistance) operates in its reverse breakdown region while the voltage across it is held constant at VZ and t

Induced emf, applications of dynamically induced emf

applications of dynamically induced emf

Ac amplitude measurement, 1. Introduction: Theory: Amplitude is defined ...

1. Introduction: Theory: Amplitude is defined as the magnitude of the change in the oscillating variable with each oscillation within an oscillating system. It is calculated as

Fermi dirac level, Fermi Dirac level: Sol. The Fermi level is simply...

Fermi Dirac level: Sol. The Fermi level is simply a reference energy level. It is the energy level at which the probability of finding an electron n energy unit above it in

Find the number of possible station frequencies, Q. Find the number of poss...

Q. Find the number of possible station frequencies in the AM broadcast system in the United States

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