What are the semiconductor devices, Physics

Assignment Help:

What are the Semiconductor Devices?

A semiconductor is a material whose conductivity is much less than a conductor (such as copper), but greater than that of an insulator (such as glass). Selected impurities can be added to a semiconductor to give it certain desired characteristics. One part per million of arsenic might be added to germanium to provide free or loosely held electrons. This substance is called “donor” or N-type material. If gallium is used as the impurity, the crystal has a lack of electrons or “holes” in its structure. This substance is called “acceptor “ or P-type material. (In both N-type and P-type crystals, the crystal as a whole is electrically neutral.) .

218_Semiconductor Devices.png

When a P-type crystal is grown next to an N-type crystal, a P-N junction is formed. Electrons can flow easily only in one direction. This is one type of diode that can be used to change alternating current (AC) to direct current (DC) by blocking any negative current: another term for this process is rectifying.

841_Semiconductor Devices 1.png

A transistor has two junctions. There are P-N-P transistors and N-P-N transistors. Many diodes and transistors can be grown on a very small piece of silicon or germanium in useful combinations called integrated circuits. A transistor can primarily be used to amplify a signal. The transistor uses energy from an external source, a battery or power line, to create an output signal that is a reproduction of the input signal but with much greater amplitude. Many diodes and transistors work together to make your computer function. 


Related Discussions:- What are the semiconductor devices

Circular motion, A car of mass 800 kg is pulling a trailer of mass 300 kg u...

A car of mass 800 kg is pulling a trailer of mass 300 kg up the slope of angle ? to the horizontal where sine ? = 1/200. Resistance to motion (apart from gravity) is 1.5 N per kg o

Calculate the standard molar enthalpy, (a) Using the thermochemical tables...

(a) Using the thermochemical tables provided, calculate the standard molar enthalpy of combustion at 298 K for the following hydrocarbon:  C C 2 H 4 (g ) (ethene)  (b)  If

Working of functional units in ultrasonic pulse echo system, Explain about ...

Explain about the working of functional units in ultrasonic pulse echo system. The master timer by the electronic clock triggers the signal pulse generator at ordinary interval

Explain the half life - Nuclear Physics, Explain the Half-Life The deca...

Explain the Half-Life The decay of a nucleus is a random event.  It is not possible to predict which nucleus will decay and when.  Even though over a period of time, the decay

Illustrate the term temperature sensor, Illustrate the term temperature sen...

Illustrate the term temperature sensor? Temperature sensor: Bimetal coated onto the tip of fiber. When temperature increases the bimetal bends because of difference within t

Classes of magnetic materials: alnico, Alnico is a family of alloys contain...

Alnico is a family of alloys containing metals Fe, Co and Ni plus small amount of Al and copper. These alloys are directionally solidified and subsequently given a heat treatment t

Balanced forces - problems with sitting still, Example 1 - A bird feeder in...

Example 1 - A bird feeder in your yard has a total mass of 3.0 kilograms and is supported as shown. What is the force on the top wire? The bird feeder is not falling so the forc

Experiments with soap films, Some experiments with soap films Make the ...

Some experiments with soap films Make the following forms from wire. Dip the several forms in the thick soap solution and view the films. Dip the wire form with the slider i

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