Semiconductor devices and their uses, Science

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.  


Posted Date: 9/29/2012 2:30:22 AM | Location : United States

Related Discussions:- Semiconductor devices and their uses, Assignment Help, Ask Question on Semiconductor devices and their uses, Get Answer, Expert's Help, Semiconductor devices and their uses Discussions

Write discussion on Semiconductor devices and their uses
Your posts are moderated
Related Questions
How does the study of personality shed light onto behavior change for you? Answer: In general, personality means as the sums of the characteristics or traits of the person; to ot

Which will most likely form when a steep mountain stream flows abruptly onto a flat plain alluvial fan

Acid solution weathering Weathering is accelerated by the presence of the hydrogen ions in water.  Rain water dissolves CO 2 from air to form carbonic acid, H 2 CO 3 . When t

what isthe optic nerve

why does the periodic table useful to scientist

Importance of nutrition: We cannot live without food. Our hunger can be satisfied by any kind of meal, but to  remain healthy and free of disease, our body requires certain kin

Isomers are different  compounds' having  same  molecular form  but  different structural forms. a) Glucose and Fructose b)  Glucose and Galactose

What constellations does the ecliptic pass by?  Where is the Celestial Equator (in relation to the planets & the ecliptic)?  Are the planets east /west of your local meridian?  Whe

how does reproduction help the white lipped tree frog survive