ABSTRACT

A new operational mode for diode-clamped multilevel inverters termed quasi two-level operation is proposed. Such operation aims to avoid the imbalance problem of the dc-link capacitors for multilevel inverters with more than three levels and reduces the dc-link capacitance without introducing any significant voltage ripple at the dc-link nodes. The proposed operation can be generalized for any number of levels. The validity of the proposed multilevel inverter operational mo ....etc

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Flexible Organic LEDâ„¢s


Presented By: Ryan Evans



What the Flexible Organic Light Emitting Diode Consist of :

The Top Layer is the Cathode layer made of tungsten releases electrons when current is run through it.

Emissive Layer removes electrons from the cathode layer to make light.

Conductive layer 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 i ....etc

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ABSTRACT
Organic light emitting diode (OLED) display technology has been grabbing headlines in recent years. Now one form of OLED displays, LIGHT EMITTING POLYMER (LEP) 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 thi ....etc

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Introduction

-What is Gunn Diode?
The Gunn diode is used as local oscillator covering the microwave frequency range of 1 to 100GHz
-How Gunn Diode works?
By means of the transferred electron mechanism, it has the negative resistance characteristic
-What’s the applications?
Local Oscillator and Avoid Collision Radar instead of Klystron etc..
-What’s the advantages?
Low noise, High frequency operation and Medium RF Power

Gunn Effect

Gunn effect was discovered by J.B Gu ....etc

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The most widely used semiconductor light sources are Light Emitting Diode (LEDs) and Lasers. Among these light sources, lasers have gained more importance due its directional properties high energy density.Laser is originated from light amplification by stimulated Emission of Radiation. The Laser is a source of highly directional, monochromatic, coherent light and finds many applications in a medical field, industries, optical communication systems, Entertainment electronics etc.There are many devices used to generate laser. Among these devic ....etc

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Consider a saturable absorber located at the end of a laser cavity whose transmission function is given by:
T=exp (-a*d)
where d is the thickness of the saturable absorber, and a is the absorption coefficient given by:
a=a0/(1+(I/Isat))
where Isat is the saturation intensity.
Generate a starting optical pulse within the laser cavity to represent photon noise within the cavity by using a random number generator i ....etc

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fffffhdedsssdfgsdgdsgdgdgdgdgdgsdg ....etc

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Consider a saturable absorber located at the end of a laser cavity whose transmission function is given by:
T=exp (-a*d)
where d is the thickness of the saturable absorber, and a is the absorption coefficient given by:
a=a0/(1+(I/Isat))
where Isat is the saturation intensity.
Generate a starting optical pulse within the laser cavity to represent photon noise within the cavity by using a random number generator i ....etc

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Presented By:Name:- SABYASACHI SABAT
Stream:- ETE
IMPATT Diode

Introduction
When the pn junction diode is reverse-biased, then current does not flow.
However when the reverse voltage exceeds a certain value, the junction breaks down and current flows with only slight increase of voltage. This breakdown is caused by avalanche multiplication of electrons and holes in the space charge region of the junction.
The pn junct ....etc

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ZENER DIODE TESTER

ABSTRACT


The testing of zener diodes requires a variable dc power supply. A typical test circuit can be constructed, as shown in figure 4-19. In this circuit, the variable power supply is used to adjust the input voltage to a suitable value for the zener diode being tested. With the zener diode connected no current will flow until the voltage across the diode is equal to the zener ....etc

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