V - I Characteristics of P - N Junction Diode
Current-Voltage characteristics of a diodeCurrent v/s voltage characteristics are attached in the figure.
Threshold voltageThreshold Voltage :
The minimum value of forward voltage after which a diode conducts is called the threshold voltage of the diode.
Reverse saturation currentA diode has very small value of current in the reverse bias due to the drift of the charge carriers known as the Reverse saturation current. It is in the order of .
Avalanche BreakdownAvalanche breakdown is a phenomenon observed in a p-n junction diode in reverse bias. When a large reverse bias voltage is applied across a p-n junction diode, thermal current starts increasing to a large value. This results in the heating of the diode. Some avalanche diodes are used as voltage regulators similar to zener diodes.
Dynamic resistanceDynamic resistance is used to quantify the resistance of non-ohmic materials. It is defined as the ratio of differential change in voltage to a differential change in current.
Dynamic resistance is itself a function of the current (or voltage) through the material for a non-ohmic conductor.
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