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

Ionising radiations, Ionising Radiations " The three types of ionising radi...

Ionising Radiations " The three types of ionising radiations mentioned above penetrate matter to different extent. Table summarises the nature, ionising power and penetration of th

Differentiate between soil water content and plant soil, Differentiate betw...

Differentiate between soil water content and plant available soil moisture.  The mass of water lost relative to mass of dry soil is called soil water content whereas plant avai

What are common elements make the minerals of the earths, Describe Common e...

Describe Common elements that make up the minerals of the Earth's crust? The Earth's crust, which is the layer of the Earth we are on now, is made of numerous minerals and rock

Explain the process of secretion, Explain the Process of Secretion In t...

Explain the Process of Secretion In the process of filtration through the glomerulus, the non-threshold substances and drugs are not cleared from the blood because the blood do

Explain proximal convoluted tubule - structures of a nephron, Explain the P...

Explain the Proximal Convoluted Tubule - Structures of a Nephron Proximal Convoluted Tubule or proximal tubule (PCT): The proximal tubule is the most proximal part of the renal

What is transamination reaction, What is Transamination Reaction ? Mos...

What is Transamination Reaction ? Most common amino acids can be converted into the corresponding keto acid by 'transamination. In this reaction, there is a transfer of a-amin

ATOMS AND MOLECULES, in a reaction 5.3g of sodium carbonate reacted with 6g...

in a reaction 5.3g of sodium carbonate reacted with 6g of ethanic acid. theproducts were 2.2 g of carbon dioxide , 0.9g water and 8.2 g of sodium ethanoate, show that these observa

Define transport of carbon dioxide combination with protein, Define the Tra...

Define the Transport of Carbon Dioxide in combination with protein Carbon dioxide forms a neutral carbamino compound with haemoglobin. It combines with the haemoglobin in the r

Heat loss in cylinderical pipe, Ask quesExplain that your intention is to i...

Ask quesExplain that your intention is to investigate a variety of combinations of pipe material, insulation material and size which you could potentially consider when deciding on

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