Reverse bias, Electrical Engineering

Assignment Help:

Reverse bias

Reverse biased generally refers to how a diode is employed in a circuit. If a diode is reverse biased, the voltage at the cathode is gets higher than that at the anode. Hence, no current will flow till diode breaks down. Connecting the P-type region to the negative terminal of the battery and the N-type region to the positive terminal corresponds to reverse bias. The connections are demonstrates in the following diagram: 

728_Reverse Bias 2.png

Figure: (a) Blocks of P and N semiconductor in contact have no exploitable properties. (b) Single crystal doped with P and N type impurities develops a potential barrier.

This type of separation of charges at the PN junction constitutes a potential barrier. This potential barrier has to be overcome through an external voltage source to form the junction conduct.

523_Reverse Bias 1.png

Figure: A silicon p-n junction in reverse bias.

The creation of the junction and potential barrier occurs during the manufacturing process. The magnitude of the potential barrier is a function of the materials employed in manufacturing. Silicon PN junctions comprises a higher potential barrier than germanium junctions.


Related Discussions:- Reverse bias

V-i characteristics - power semiconductor devices , V-I Characteristics ...

V-I Characteristics  In the  normal  mode of  operation of an IGBT  a positive  voltage is applied to the collector relative to emitter. When  the gate is at zero potential wi

Find the charge flowing and number of electron, Q. A current i(t) = 20 cos(...

Q. A current i(t) = 20 cos(2π × 60)t A flows through a wire. Find the charge flowing, and the number of electrons per second that are passing some point in the wire.

Why is an emitter bypass capacitor in amplifier, Q.  Why is an emitter bypa...

Q.  Why is an emitter bypass capacitor used in an RC coupled amplifier? If an emitter resistor Re is used for self-bias in an amplifier and if it is desired to avoid the degene

Explain public mode, Explain PUBLIC For large programs several small mo...

Explain PUBLIC For large programs several small modules are linked together. In order that the modules link together correctly any variable name or label referred to in other m

A Capacitor-Fed, A Capacitor-Fed, Voltage-Step-Down, Single-Phase, Non-Isol...

A Capacitor-Fed, Voltage-Step-Down, Single-Phase, Non-Isolated Rectifier

Microcontroller interfacing, The winch uses a 415 Volt 50 Hz AC motor, so b...

The winch uses a 415 Volt 50 Hz AC motor, so both the up/down and run/stop controls actually operate +24V relays, whose contacts switch the 415Vac to the winch. The relays also pro

Show the familiar electric sources, Q. Show the familiar electric sources? ...

Q. Show the familiar electric sources? Batteries and ac outlets are the familiar electric sources. These are voltage sources.An ideal voltage source is one whose terminal volta

Write a brief note on common drain amplifier, Q. Write a brief note on comm...

Q. Write a brief note on common drain amplifier Since voltage at the gate-drain is more easily determined than that of the voltage at gate-source, the voltage source in the inp

Wheaton bridge with differential amplifier, when strain gauge design give a...

when strain gauge design give accurate measurement on zero and maximum 999kg but not 500kg

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