Semiconductor devices and their uses, Science

Assignment Help:

Semiconductor Devices and their Uses:

If a junction  is formed between a p-type and an n-type'semiconductor,  the device called a p- n  junction diode acquires a peculiar pppeny. It conducts current only in one direction! Hence, it  is usedto convert alternating current (a.c.),into  direct current (44 The device acts as an open circuit in Fig. It acts as ag  open circiit Fig. And since it is a non-mechanical  switch, it acts very fast. 

 

1936_Semiconductor Devices and their Uses.png

More complicated devices using n-p-n  or p-n-p combinations of semiconductor mat6rial are called transistors.  They have even more interesting properties. They can be so  connected to batteries that a small variation of current on one side, can lead to a large variation on the other side. In technical jargon, the transistor can 'amplify' small signals. Transistors can also be connected  to other electrical components (resistors, capacitors etc.) to produce a.c. of high frequency.   

Semiconductor devices are extremely small in size. Their properties can be controlled at will. This may be done by changing the amount of doping or by  introducing more sections of p-type or n-type semiconductors on the same crystal. A large number of new semiconductor devices have been made in this way. Further, by  suitable methods, they can be produced  in a large chain or according to a desired pattern'on  a non-conducting surface called a chip. When a large number of semiconductor devices are produced on a single chipto perform specific functions, the resulting device is called an integrated circuit (IC). Because of their small size and their sturdiness, and because they consume almost no energy, these devices hive become very popular as components in TV sets, computers and many kinds of  instruments used for communication and control.  

 


Related Discussions:- Semiconductor devices and their uses

What is the absorded dose to air, a. How many ion pairs are produced in 1 c...

a. How many ion pairs are produced in 1 cm 3 of air during an exposure of 100 mR? The density of air at STP is ρ = 1:293kg m -3 . What is the absorded dose to air? b. An thin w

Science, Structure of the brain. Include different parts and their function...

Structure of the brain. Include different parts and their function.

Animals, what are the kinds of animals?

what are the kinds of animals?

How are clouds formed?, Q.How are clouds formed? During day time, on bei...

Q.How are clouds formed? During day time, on being heated, a large amount of water evaporates from various water bodies and goes into the air. A part of this water vapour also r

Explain the mechanism of blood coagulation, Question 1. Explain the mec...

Question 1. Explain the mechanism of blood coagulation 2. Which are the different tests done for investigation of a bleeding disorder? Explain any two tests 3. Explain th

Explain the mucous membrane, Explain the Mucous Membrane This layer is ...

Explain the Mucous Membrane This layer is lined by the epithelial cells. Parts of the tract which are subject to mechanical injury, the layer consists of stratified squamous ep

Physical science, Imagine a small observer is positioned in front of cork i...

Imagine a small observer is positioned in front of cork in your picture above. As the cork approaches, the observer measures the wavelength of the waves passing by. How does this w

Define inzmunoglobulin d - classification of antibodies, Define Inzmunoglob...

Define Inzmunoglobulin D - classification of antibodies Present on surface of B lymphocytes, along with IgM plays a role in Ag recognition.

What is decarboxylation reaction and biogenic amines, What is Decarboxylati...

What is Decarboxylation Reaction and Biogenic Amines What are biogenic amines? Any of a group of naturally occurring, biologically active amines, such as norepinephrine, histam

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