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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 ,
by polishing the parallel end faces, a laser can be formed. Laser diodes are commonly used in optical storage devices and for high speed optical communication.
Diodes (The PN Junction)
 If a piece of intrinsic silicon is doped so that half is n-type and the other half is p-type, a 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 impurit..................[:=> 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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sed 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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ethwisch David G. (2008). Fundamentals of
Materials Science and Engineering An Integrated Approach. John Wiley and Sons inc. (2007). Pg 777

O. Prache, Active matrix molecular OLED microdisplays, Displays Volume 22, Issue 2, May 2001, Pages 49“56...................[:=> 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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ng 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 satellite' cluster that is made up out of all the communicating 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 cons..................[:=> 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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uces 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 laser printers.
Our paper tries to introduce s..................[:=> 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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on 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 other display..................[:=> 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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totransistors feed a photocurrent output into the base of a small signal transistor. For each illumination level, the output is defined by the area of the exposed collector-base junction and the DC current gain of the transistor. The base current from the incident photons is amplified by the gain of the transistor, resulting in current gains that range from hundreds to several thousands.
Principle:

The actual operation of a phototransistor depends on the biasing arrangement and light frequency. For instance , if a PN junction is forward biased, the increased current through ..................[:=> 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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iconductor such as silicon. Device engineers and ..................[:=> Show Contents <=:]



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