What is the advantage of diode?

Benefits or advantages of Diode ➨It functions as rectifier in order to convert alternating current into direct current. ➨It is used to suppress voltage spikes. Moreover it is used to protect electronic components which are vulnerable to reverse voltages. ➨It is fast in operation and does not require any warm up time.

What is the special characteristics of the tunnel diode?

A Tunnel diode is a heavily doped p-n junction diode which displays a negative resistance behaviour in a specific region in its characteristic curve. By Negative resistance we mean that in that region, the current flowing through the diode decreases as the voltage is increased.

What is the principle of a tunnel diode?

A Tunnel Diode is s pn junction that exhibits negative resistance between two values of forward voltage. According to the classical laws of physics a charged particle sin order to cross an energy barrier should possess energy at least equal to the energy barrier.

What are the applications of tunnel diode?

Applications of Tunnel Diode

• Tunnel diode can be used as a switch, amplifier, and oscillator.
• Since it shows a fast response, it is used as high frequency component.
• Tunnel diode acts as logic memory storage device.
• They are used in oscillator circuits, and in FM receivers.

Why does tunnel diode have negative resistance?

The tunnel diode is a negative resistance semiconductor p-n junction diode. The doping concentration of both p and n region is very high due to which the fermi level on p-side goes below the valence band and fermi level of n-side goes above the conduction band which results in small width of depletion region (100 Å).

What is a tunnel diode easy definition?

A Tunnel diode is a heavily doped p-n junction diode in which the electric current decreases as the voltage increases. In tunnel diode, electric current is caused by “Tunneling”. The tunnel diode is used as a very fast switching device in computers. It is also used in high-frequency oscillators and amplifiers.

What are the applications of tunnel diode in electrical circuits?

There is a huge application and uses of tunnel diode in electrical and electronic circuits. Tunnel diode has many important advantages, so they are used in electrical as well as electronic circuits. Tunnel Diodes are working in the principle of Tunneling Effect.

What is negative resistance in a tunnel diode?

Negative resistance means the current across the tunnel diode decreases when the voltage increases. In 1973 Leo Esaki received the Nobel Prize in physics for discovering the electron tunneling effect used in these diodes.

What is the difference between tunnel diode and normal p-n junction?

This heavy doping process produces an extremely narrow depletion region. The concentration of impurities in tunnel diode is 1000 times greater than the normal p-n junction diode. In normal p-n junction diode, the depletion width is large as compared to the tunnel diode.

Why do the conduction band and valence band overlap in tunnel diode?

In tunnel diode, the conduction band of the n-type material overlaps with the valence band of the p-type material because of the heavy doping. Because of this overlapping, the conduction band electrons at n-side and valence band holes at p-side are nearly at the same energy level.