Write down shockleys equation, Electrical Engineering

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Q. Write down Shockley's equation. What is its importance?

ID = IDSS [1-(VGS/VP)]^2

Shockley's equation is used to plot transfer characteristics. The transfer characteristics defined by Shockley's equation are unaffected by the network in which the device is employed.

A linear relation exists between IC and IB. Double the level of  IB and IC increase by a factor of two also. But this linear relation does not exist between the output and input quantities of a JFET.  The relation between ID and VGS is also given by this equation.


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