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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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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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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Ada previous year questions paper from vtu from 2010 to till now free download for the current exams ....etc

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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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PN-Junction Diode Characteristics

Forward Bias --- External battery makes the Anode more positive than the Cathode --- Current flows in the direction of the arrow in the symbol.
Reverse Bias --- External battery makes the Cathode more positive than the Anode --- A tiny current flows opposite to the arrow in the symbol.

Series-Connected Diodes

Use 2 diodes in series to withstand higher reverse breakdown voltage.
Both diodes conduct the same reverse saturation current, Is.

Diode Characte ....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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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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1.The fund which do not have fixed date of redemption:
(A)Close ended funds(B)
(C ) Open ended funds(D)
Diversified funds Both (A) and (B)

2.Credit rating of debt security is :
(A)Merely opinion(B) Guarantee repayment
(C ) Positive suggestion(D) None of these

3.Which of the following is not available in India?
(A)Commodity futures(B) Index futures
(C ) Commodity options(D) Index option

4.In India, derivatives interest rate are regulated by :
(A)Securities and exchange board of India
(B)Forward market commi ....etc

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