Define dynamic resistance of diode. State, how it is calculated using forward characteristics of diode.

Define dynamic resistance of diode. State, how it is calculated using forward characteristics of diode.
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1 Answer

Answer :

Definition:

The resistance offered by the diode to the AC operating conditions is known as the ‘Dynamic resistance’ or ‘Incremental resistance’ or ‘AC resistance’ of a diode.

It is denoted by rf in the forward biased condition.

Dynamic forward resistance is calculated by taking change in forward voltage w.r.t. change in forward current

rf = ΔVF/ΔIF.

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Dynamic resistance is actually the reciprocal of the slope of the forward characteristics.

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