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IMPATT Diode


Posted by: projectsofme
Created at: Tuesday 21st of December 2010 05:27:17 AM
Last Edited Or Replied at :Tuesday 21st of December 2010 05:27:17 AM
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negative resistance characteristics in the microwave frequency range.
Since the negative resistance is based upon avalanche multiplication and transit-time effect of carriers, the device has been called the IMPATT (Impact Avalanche Transit-Time) Diode.
Device Structure

The original suggestion for a microwave device employing transit-time effect was made by W. T. Read and involved an n+-p-i-p+ structure such as that shown in figure. This device operates by injecting carriers into the drift region and is called an IMPATT diode.
The device consists essentially of two regions:
..................[:=> Show Contents <=:]



Network Traffic Analysis


Posted by: mechanical engineering crazy
Created at: Wednesday 05th of August 2009 06:45:27 AM
Last Edited Or Replied at :Wednesday 05th of August 2009 06:45:27 AM
network traffic compression , network traffic congestion, what is network traffic engineering , nsasoft network traffic emulator, network traffic encryption , network traffic simulator, network traffic engineering , network traffic control software, network traffic controller , network traffic check, network traffic counter , network traffic calculator, network traffic classification , network traffic characteristics of data centers in the wild, network traffic capture , network traffic control, Network Traffic , Analysis, Traffic , Network, computer engineering network traffic analysis project ,
This session is intended to help new or beginn..................[:=> Show Contents <=:]



Spectral and nonlinear optical characteristics of nanocomposites of ZnO


Posted by: super
Created at: Saturday 13th of June 2009 10:22:20 PM
Last Edited Or Replied at :Saturday 13th of June 2009 10:22:20 PM
ZnO,
omposites can be
attributed to the concentration of exciton oscillator strength. This study is important in identifying
the spectral range and composition over which the nonlinear material acts as a RSA based optical
limiter. ZnO“CdS is a potential nanocomposite material for the tunable light emission and for the
development of nonlinear optical devices with a relatively small limiting threshold. © 2008
American Institute of Physics. DOI: 10.1063/1.2919109
I. INTRODUCTION
Semiconductor nanoparticles have been under continu-
ous scientific interest because of their unique ..................[:=> Show Contents <=:]



Electrical Characteristics of n-ZnOp-Si Heterojunction Diodes


Posted by: seminar projects crazy
Created at: Saturday 13th of June 2009 03:37:49 PM
Last Edited Or Replied at :Saturday 13th of June 2009 03:37:49 PM
Diodes , Heterojunction, n ZnOp Si , Characteristics, Electrical , band structure of zno si heterostructure, heterojunction in zno p si pdf , band parameter of semiconducter used in heterostructure, diode bas sur zno si n heterojonction these , l heterojonction zno si pdf, zno si heterojunctions ,
ucture of n-ZnO/p-Si at the hetero-
244
junction can be constructed using the Anderson
245
model
32
by assuming continuity of vacuum levels
246
and neglecting the effects of dipole and interfacial
247
states. A similar band structure has been suggested
248
for doped and pure ZnO/Si heterojunction by P Chen
249
et al.
26,33
Figures 7a and 8 show the constructed
250
band structure of the n-ZnO/p-Si heterojunction
251
fabricated at the 0.007 mbar oxygen pressure under
252
zero and forward bias, respectively. Values of the
253
band gaps of E
g
(ZnO) = 3.257 eV and E
g
(..................[:=> Show Contents <=:]



Electrical Characteristics of n-ZnOp-Si Heterojunction Diodes


Posted by: seminar projects crazy
Created at: Saturday 13th of June 2009 03:34:37 PM
Last Edited Or Replied at :Saturday 13th of June 2009 03:34:37 PM
Diodes , Heterojunction, n ZnOp Si , Characteristics, Electrical , impedance heterojunction,
1
in a higher turn-on voltage for the p-Si/ZnO junction
282
grown at 0.007 mbar oxygen pressure. However,
283
under higher forward bias, the barrier difference is
284
lowered and the injection of electrons from the bot-
285
tom of the conduction band on the ZnO side to the
286
p-Si increased considerably (as shown in Fig. 8).
287
Thereby the forward current rapidly increased
288
under a higher voltage bias. When the oxygen
289
pressure during the deposition of ZnO was
290
decreased, the carrier concentration increased and
291
hence the Fermi level shifted towards the botto..................[:=> Show Contents <=:]



HOSPITAL WASTE MANAGEMENT


Posted by: seminar projects crazy
Created at: Friday 30th of January 2009 12:58:54 PM
Last Edited Or Replied at :Wednesday 23rd of February 2011 09:54:13 PM
MANAGEMENT, WASTE , HOSPITAL, hospital waste management ppt , hospital, biomedical waste management in hospitals ppt , biomedical waste management project topics, characteristics of a good waste disposal system of a hospital , hospital waste management in india ppt, hospital biomedical waste disposal and ppt , hospital wastw management ppt, metods disposal solid waste hospital ppt , hospital waste management project report, hospital waste management project pdf file , powerpoint presentation on hospital waste management system, powered by mybb medical hospitals , project report on waste management in hospital, topics on waste management ppt , research paper topics on waste disposal of hospital,
ructure of the waste management committees and/or teams. The system designed for the two hospitals, namely the Sree Avittom Tirunal Hospital and Medical C..................[:=> Show Contents <=:]



Magnetic Amplifiers


Posted by: seminar projects crazy
Created at: Monday 26th of January 2009 10:40:13 PM
Last Edited Or Replied at :Monday 26th of January 2009 10:40:13 PM
Amplifiers, Magnetic , magnetic amplifier doc, series and parallel connections magnetic amplifier , magnetic amplifier, magnetic amplifier characteristics , characteristics magnetic amplifier, characteristics of magnetic amplifier , some points for seminar on magnetic amplifier, seminar topic on magnetic amplifiers , current measurement magnetic amplifier, measuring current low currents transformer magnetic amplifier , magnetic amplifier seminar, seminar on magnetic amplifier , mag amp priciples, magamp post regulator , amplifying magnetic fields, andrew piaskowski magnetic amplifier ,
n lighting control. They have been largely superseded by semiconductor based solid-state switches, though recently there has been some regained interest in using mag amps in compact and reliable switching power supplies. PC ATX power supplies often use mag amps for secondary side voltage regulation.

Magnetic amplifiers are still used in some arc welders.

Magnetic amplifier transformer cores designed specifically for switch mode power supplies are currently manufactured by several large electromagnetics companies, including Metglas and Mag-Inc.

Magnetic amplifiers can be used for measu..................[:=> Show Contents <=:]



Low-Voltage Differential Signaling LVDS


Posted by: computer science crazy
Created at: Sunday 21st of September 2008 12:42:32 AM
Last Edited Or Replied at :Monday 04th of July 2011 12:17:18 PM
LVDS , Signaling, Differential , Low Voltage, low voltage differential signalling , low voltage signaling, low voltage differential signaling seminar , low voltage differential signaling, lvds seminars and ppts , poster presentation on low voltage differential signaling, low voltege differential signaling , lvds rs422 single ended interface scheme, low votage differential signalling seminar report , lvds sminar report, seminar report low voltage differential signaling pdf , seminar report on low voltage differential signalling pdf file, low voltage differential signaling seminar pdf , lvds abstract and report doc, tia eia 899 electrical characteristics of multipoint low voltage differential signaling ,
level ICs

LVDS technology allows products to address high data rates ranging from 100's of Mbps to greater than 2 Gbps. For all of the above reasons, it has been deployed across many market segments wherever the need for speed and low power exists.

Consumers are demanding more realistic visual information in the office and in the home. This drives the need to move video, 3D graphics and photo-realistic image data from cameras to PCs and printers through LAN, phone, and satellite systems to home set-top boxes and digital VCRs. Solutions exist today to move this high-speed digital data bot..................[:=> Show Contents <=:]



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