Friday, 10 May 2013

Special purpose diodes...!

Tunnel diode:
It is a special type of diode which is capable of very fast operation by using the effect called tunneling. It exhibits negative resistance. That means when voltage is increased the current through it decreases. Tunnel diode is heavily doped N. It has very narrow depletion region.

Application:
Used in oscillator and microwave amplifier.

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