Discuss volt-ampere characteristics of a tunnel diode, Physics

Assignment Help:

Draw and discuss volt-ampere characteristics of a tunnel diode.

Ans:  Volt-ampere characteristics of a tunnel diode: The V-I characteristics of a tunnel diode are shown in fig. (a) Forward bias produces immediate conduction as soon as forward bias is applied, significant current is produced.  Current attains quickly its peak value Ip, when applied forward bias attains a value of  Vp volts. Current variation in the vicinity  of  origin  is  because of quantum  mechanical  tunneling  of  electrons  through  narrow space  charge  region  of  the  junction.  With  further  increase  in  forward  voltage,  diode current starts decreasing till it attains its minimum value, called valley current Iv corresponding to valley voltage Vv. Hence from peak point A to valley point B the diode current falls with increase in voltage resulting in negative resistance in this region. ACTUALLY this portion A B of the characteristic constitutes the most useful property of diode. In  this  region  diode,  rather than absorbing  power,  produces  power.   So  tunnel diode can be used as a very high frequency oscillator. For voltages higher than valley voltage Vv current starts increasing as in any normal diode.

 

1598_tunnel diode.png


Related Discussions:- Discuss volt-ampere characteristics of a tunnel diode

Electricity & Magnetism, A charge q1 is 9.00um is at the origin, and a char...

A charge q1 is 9.00um is at the origin, and a charge q2 is -4.00um is on the x- axis 0.30m from the origin. find the electric field strength at point P, which is on the y - axis 0.

Ouestion, what is different between acid and base?

what is different between acid and base?

Low frequency loop impedance, Low frequency loop impedance: Low frequen...

Low frequency loop impedance: Low frequency loop impedance testing is a useful method complementary to DC bonding testing.  A visual inspection of cable bundle shields, complem

Determine the weight of a body, Determine the weight of a body. Princip...

Determine the weight of a body. Principle: When a spring is fixed at one end and a force is applied to the other end the stretching of the spring is proportional to the applie

Rectifier, Ask question #Minimum 25 pages accepted#

Ask question #Minimum 25 pages accepted#

State isobaric process, In isobaric process pressure of the gas is constant...

In isobaric process pressure of the gas is constant overall the process. As, V/T is constant in isobaric process.

Determine the heat energy added to the mixture, 1) Consider 2kg mixture of ...

1) Consider 2kg mixture of H 2 and N 2 ideal gases inside a closed piston-cylinder device at 150kPa and 100o C. This mixture has 0.4 mole fraction of H 2 . This mixture undergoes

Cut an apple in two parts with inertia, Cut an apple in two parts with iner...

Cut an apple in two parts with inertia Secure a long sharp knife like as a carving knife. Cut into the apple with the knife unless you can pick them up together. Be sure to hav

WORK AND ENERGY, a boy throws a ball of mass 20 kg vertically upwards.it ra...

a boy throws a ball of mass 20 kg vertically upwards.it raises to a maximum height of 100 m.at what height will the kinetic energy be reduced to 70%

Centre of gravity, CENTRE OF GRAVITY: Consider a body as an accumu...

CENTRE OF GRAVITY: Consider a body as an accumulation of many small masses (molecules), all subject to gravitational attraction.  The total weight, which is a force , is

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd