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Semiconductor Diodes And Their Applications Pdf

semiconductor diodes and their applications pdf

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Special-purpose Diodes

S chottky diodes are constructed of a metal -to-N junction rather than a P-N semiconductor junction. Also known as hot-carrier diodes, Schottky diodes are characterized by fast switching times low reverse-recovery time , low forward voltage drop typically 0. This makes them well suited for high-frequency applications. Unfortunately, though, Schottky diodes typically have lower forward current IF and reverse voltage VRRM and VDC ratings than rectifying diodes and are thus unsuitable for applications involving substantial amounts of power. Though they are used in low voltage switching regulator power supplies.

Semiconductor diodes and applications

A Tunnel diode is a heavily doped p-n junction diode in which the electric current decreases as the voltage increases. The tunnel diode is used as a very fast switching device in computers. It is also used in high-frequency oscillators and amplifiers. The circuit symbol of tunnel diode is shown in the below figure. In tunnel diode, the p-type semiconductor act as an anode and the n-type semiconductor act as a cathode. We know that a anode is a positively charged electrode which attracts electrons whereas cathode is a negatively charged electrode which emits electrons.

semiconductor diodes and their applications pdf

A Semiconductor diode consists of an n material region and a p material region separated by a pn junction. – the n region has many conduction electrons.

Semiconductor Diode and Its Applications

The Schottky diode named after the German physicist Walter H. Schottky , also known as Schottky barrier diode or hot-carrier diode , is a semiconductor diode formed by the junction of a semiconductor with a metal. It has a low forward voltage drop and a very fast switching action.

Diode is a marvelous device that passes current only in one direction.

A semiconductor device is an electronic component that relies on the electronic properties of a semiconductor material primarily silicon , germanium , and gallium arsenide , as well as organic semiconductors for its function. Semiconductor devices have replaced vacuum tubes in most applications. They use electrical conduction in the solid state rather than the gaseous state or thermionic emission in a vacuum.

University of California at Berkeley. Donald A. Glaser Physics A. Instrumentation Laboratory.

A diode is a two-terminal electrical device, that allows the transfer of current in only one direction. The diode is also known for its unidirectional current property, where the electric current is permitted to flow in one direction. Basically, a diode is used for rectifying waveforms, within radio detectors or within power supplies. Most of the diodes are made from semiconductors such as Si silicon , but in a few cases, Ge germanium is also used. It is sometimes beneficial to summarize the different types of diodes are existing.

Schottky diode is a metal-semiconductor junction diode that has less forward voltage drop than the P-N junction diode and can be used in high-speed switching applications. In a normal p-n junction diode , a p-type semiconductor and an n-type semiconductor are used to form the p-n junction. When a p-type semiconductor is joined with an n-type semiconductor, a junction is formed between the P-type and N-type semiconductor. This junction is known as P-N junction. In schottky diode, metals such as aluminum or platinum replace the P-type semiconductor.

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  1. Maria R.

    05.05.2021 at 23:25

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