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Junction Diode


Posted by: seminar class
Created at: Thursday 07th of April 2011 02:27:20 AM
Last Edited Or Replied at :Thursday 08th of November 2012 01:26:00 AM
pn junction diode , special purpose diode ppt, pm junction diode ,
pn junction forms between the two regions as indicated in on the first slide
 The p region has many holes (majority carriers) from the impurity atoms and only a few thermally generated free electrons (minority carriers).
 The n region has many free electrons (majority carriers) from the impurity atoms and only a few thermally generated holes (minority carriers).
 Diodes (The PN Junction)
 Diodes (The Depletion Region)
 Diodes (The Barrier Potential )
 Any time there is a positive charge and a negative charge near each other, there is a force acting on the charges.
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Design and analysis of spindle with Spm-special purpose machine


Posted by: project report maker
Created at: Monday 05th of July 2010 12:15:24 PM
Last Edited Or Replied at :Sunday 25th of July 2010 10:19:44 AM
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ered in designing it and then checked for the strength and life. The specifications required for the design are taken from the drafted design
The analysis of spindle assembly includes:
¢ Analysis of..................[:=> Show Contents <=:]



Flexible Organic Light Emitting Diode full report


Posted by: project topics
Created at: Saturday 10th of April 2010 01:04:51 PM
Last Edited Or Replied at :Wednesday 14th of March 2012 11:36:34 PM
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ther LEDâ„¢s.

The problem of the longevity of the Organic LED has been over come by adding a thin sheet of metal in with it.




Referen..................[:=> Show Contents <=:]



Using Light Emitting Diodes for Intersatellite Links full report


Posted by: project topics
Created at: Saturday 03rd of April 2010 01:08:46 PM
Last Edited Or Replied at :Saturday 03rd of April 2010 01:08:46 PM
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emand for long-distance ISLs. Laser links have also been proposed for connecting geostationary satellites with low-Earth-orbiting satellites, with aircraft or direct to the ground. Connecting to rapidlymoving LEO satellites poses engineering challenges for acquisition and tracking; connecting through the atmosphere adds additional signal loss and interference. 1

2 (b). Short-distance ISLs,
etween formation-flying satellites that are relatively near to each other (tens of km or less) and stationkeeping together. The satellites are close enough to be able to interact to create a 'virtual sa..................[:=> Show Contents <=:]



SPECIAL PURPOSE MACHINES


Posted by: project topics
Created at: Friday 02nd of April 2010 04:50:39 AM
Last Edited Or Replied at :Sunday 06th of March 2011 11:11:00 PM
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working is also explained...................[:=> Show Contents <=:]



Organic light emitting diode OLED seminar report


Posted by: electronics seminars
Created at: Friday 01st of January 2010 12:49:12 AM
Last Edited Or Replied at :Monday 01st of August 2011 12:07:30 AM
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) technology is rapidly emerging as a serious candidate for next generation flat panel displays. LEP technology promises thin, light weight emissive displays with low drive voltage, low power consumption, high contrast, wide viewing angle, and fast switching times.
One of the main attractions of this technology is the compatibility of this technology with plastic-substrates and with a number of printer based fabrication techniques, which offer the possibility of roll-to-roll processing for cost-effective manufacturing.
LEPs are inexpensive and consume much less power than any other flat p..................[:=> Show Contents <=:]



PHOTOTRANSISTOR A LEAP OF OPTOELECTRONICS


Posted by: computer science crazy
Created at: Friday 17th of April 2009 07:55:58 AM
Last Edited Or Replied at :Friday 17th of April 2009 07:55:58 AM
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t will flow. This current is called dark current. This current consists of leakage current of the collector base Jn multiplied by the dc current gain of the transistor. due to the presence of this current the phototransistor is not considered as completely off .The dark current is temperature dependent. It is usually specified at 25°C.

Speed of response:

The speed of response of a phototransistor is totally dominated by the capacitance of the collector - base Jn and the value of load resistance. The phototransistor takes a certain amount of time to respond to sudd..................[:=> Show Contents <=:]



Spintronics


Posted by: computer science crazy
Created at: Sunday 21st of September 2008 12:16:41 AM
Last Edited Or Replied at :Friday 12th of October 2012 12:36:55 PM
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f such spintronics

Spintronics is an emergent technology that exploits the quantum propensity of the electrons to spin as well as making use of their charge state. The spin itself is manifested as a detectable weak magnetic energy state characterised as spin up or spin down.

Conventional electronic devices rely on the transport of electrical charge carriers - electrons - in a semiconductor such as silicon. Device engineers and physicists are now trying to exploit the spin of the electron rather than its charge.
Spintronic-devices combine the advantages of magnetic materials and se..................[:=> Show Contents <=:]



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