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A diode for which you can change the reverse bias, and thus vary the capacitance is called a
- AVaractor diode
- Btunnel diode
- CZener diode
- Dswitching diode
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Varactor diode: It is a p-n junction diode whose capacitance is varied by varying the reverse voltage.
Tunnel Diode: It is a highly doped semiconductor which is capable of very fast operation. It is used in frequency detectors and converters.
Zener diode: The Zener diode will be operated in the reverse breakdown region so that the voltage will remain constant. In that region, the voltage will be equal to the breakdown voltage. This will make the Zener diode to work as a voltage regulator.
Tunnel Diode: It is a highly doped semiconductor which is capable of very fast operation. It is used in frequency detectors and converters.
Zener diode: The Zener diode will be operated in the reverse breakdown region so that the voltage will remain constant. In that region, the voltage will be equal to the breakdown voltage. This will make the Zener diode to work as a voltage regulator.