What are the applications of Zener diode?
What are the applications of Zener diode?
Following are the applications of Zener diode: Zener diode as a voltage regulator: Zener diode is used as a Shunt voltage regulator for regulating voltage across small loads. The breakdown voltage of Zener diodes will be constant for a wide range of current.
What happens when a Zener diode exceeds knee voltage?
Zener diode is connected parallel to the load to make it reverse bias and once the Zener diode exceeds knee voltage, the voltage across the load will become constant. When the input voltage is higher than the Zener breakage voltage, the voltage across the resistor drops resulting in a short circuit.
Which quadrant represents the forward characteristics of a Zener diode?
The first quadrant in the graph represents the forward characteristics of a Zener diode. From the graph, we understand that it is almost identical to the forward characteristics of any other P-N junction diode.
What happens to current when voltage is increased in Zener?
When we increase the voltage through Zener in reverse bias mode, first current increases uniformly with it but after it reaches the breakdown state, the current increases massively for a very small or negligible change in voltage. The change is sharper in Zener than the normal diode.
What is Zener breakdown voltage on the I-V curve?
This zener breakdown voltage on the I-V curve is almost a vertical straight line. The Zener Diode is used in its “reverse bias” or reverse breakdown mode, i.e. the diodes anode connects to the negative supply.
How do you use a Zener stabiliser in a rectifier?
By connecting a simple zener stabiliser circuit as shown below across the output of the rectifier, a more stable output voltage can be produced. Resistor, RS is connected in series with the zener diode to limit the current flow through the diode with the voltage source, VS being connected across the combination.
