Gunn diode working principle VI characteristics & applications

Gunn diode

Gunn diode operates on the Gunn effect which is named after its inventor J.B. Gunn. He discovered the periodic variation of current in a GaAs (gallium arsenide) rod in 1963. The microwave device that operates on the principle of transfer of electrons is called as Gunn diode. This is one of the diodes used as a microwave detector. It uses the avalanche and transit time properties of semiconductors. The mechanism of transferred electrons is related to the conduction band electrons. In the case of certain semiconductor devices, the conduction band…

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Zener diode as voltage regulator, working & applications

Zener diode

Zener Diode is a special purpose PN junction diode its construction is similar to a conventional PN junction diode. Here we will discuss the working of Zener diode as voltage regulator. Overview: Zener diode is a special type of Diode specifically designed to operate in reverse biased mode. Zener diodes are available in the range from 3V to 200 Volts. They are operated in a breakdown region hence they are called breakdown diode.The reverse breakdown voltage of the Zener diode adjusts by doping level. Biasing of zener diode: Biasing of…

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Shockley Diode: Construction Working Applications

Shockley diode symbol

Introduction: Definition: Shockley diode is a four layer (P-N-P-N) semiconductor device. Like pn junction diode It conducts in forward bias and stops conducting in reverse bias. The main difference between conventional diode and Shockley diode is, it starts conducting when the forward voltage crosses it’s breakdown voltage. It is an active components. It is named after it’s inventor William Bradford Shockley. Shockley was the first semiconductor devices invented which was a “pnpn” diode. ( Types of Diode and symbol) It is equivalent to a thyristor without a gate. Shockley Diode is not widely because…

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Definition of Diode working and application

PN junction diode symbol

The definition of diode is very simple, “A diode is a two-terminal polarized electronic component which mainly conducts current in one direction and blocks in other direction. Its resistance in one direction is low (ideally zero) and high (ideally infinite) resistance in the other direction.” There are various types of Diode like Zener, Schottky, tunnel, varactor, etc.. you must read this article Types of diode and symbol of Diode. Explanation: 1.) A diodes show’s such special behavior due to the junction formed between the two (N-type and P-type) materials used…

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