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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 ,
letion region there are many positive charges and many negative charges on opposite sides of the pn junction.
 The forces between the opposite charges form an electric field.
 This electric field is a barrier to the free electrons in the n region, and energy must be expended to move an electron through the electric field.
 That is, external energy must be applied to get the electrons to move across the barrier of the electric field in the depletion region.
Diodes (Forward Bias )
 Since unlike charges attract, the positive side of the bias-voltage source attracts th..................[:=> Show Contents <=:]



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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Based on deflection decide an optimum positioning of the spindle bearings..................[:=> 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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is made from a type of organic plastic that removes the electron wholes

Then the Anode Layer that consist of removing and adding electron holes while the current is running through it and is made from graphite particles

Followed by the Substrate layer is used to support the Organic LED and is made up of glass, clear plastic



Some Advantages of Using Organic LEDâ„¢s

The Flexible Organic LED is easily mass produced because of its unique ability to be printed out on Ink Jet printers and sometimes Screen Printing Technologies.

The enable people to see a wide ranged of ..................[:=> 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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ing satellites, and is more than the sum of its parts. This clustering can also be applied to nearby stationkeeping geostationary satellites. Formation flying is the foundation of the DARPA F6 effort. Because the local links in b) are much shorter distance than the links discussed in a), use of lasers and the extremely accurate pointing they offer can be considered engineering overkill for this application. These shorter local links are commonly expected to be high-frequency wireless links. Reuse of terrestrial wireless technologies, adapted for space and for increased distance, has been propo..................[:=> 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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g the need for external batteries. This not only reduces the device cost but also at the same time reduces the entire equipment size.
Integrated starter generator which is used in electric vehicles acts as a bidirectional energy converter as a motor when powered by the battery or a generator when driven by the engine. Linear motors are used to propel high speed MagLev trains. Micro motors plays an important role in computer hard drives, optics, sensors and actuators.A special type of outer rotor motors used to drive the polygonal rotating mirrors which are mounted directly on the rotor in..................[:=> 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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ed in television screens and computer monitors and become the ubiquitous display medium of the 21st century.

INTRODUCTION
Light emitting polymers or polymer based light emitting diodes discovered by Friend et al in 1990 has been found superior than other displays like, liquid crystal displays (LCDs) vacuum fluorescence displays and electro luminescence displays. Though not commercialised yet, these have proved to be a mile stone in the filed of flat panel displays. Research in LEP is underway in Cambridge Display Technology Ltd (CDT), the UK.
In the last decade, several..................[:=> 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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vely replaces the base current. The physical base lead of the transistor can be left as an open terminal, or it can be used to bias up to a steady state level. It is the nature of transistors that a change in base current can cause a significant change (increase) in collector current. Thus, light stimulation causes a change in base current, which in turn causes a bigger increase in collector current and, considering the current gain ,a rather large increase at that.


Characteristics :


The Phototransistor has a high power output for a photo-electric device and gives goo..................[:=> 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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u but the concept isn't so very exotic .This technological discipline aim to exploit subtle and mind bending esoteric quantum property of electron to develop a new generation of electronics devices. The ability to exploit spin in semiconductor promise a new logical devices as spin transistor etc with enhanced functionality higher speed and reduction power conception and might have a spark revolution in semiconductor industry. so far the problem of injecting electron with controlled spin direction has held up the realization of such spintronics

Spintronics is an emergent technology that expl..................[:=> Show Contents <=:]



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