Fri February 25, 2011 By: Padmini Kommu

How is the Zener diode used as a voltage regulator?

Expert Reply
Fri February 25, 2011
Dear student
Zener diodes are widely used as voltage references and as shunt regulators to regulate the voltage across small circuits. When connected in parallel with a variable voltage source so that it is reverse biased, a Zener diode conducts when the voltage reaches the diode's reverse breakdown voltage. From that point on, the relatively low impedance of the diode keeps the voltage across the diode at that value.
Hope this helps.
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