Which one of the following is a negative differential resistance diode ?

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KVS TGT WET (Work Experience Teacher) 23 Dec 2018 Official Paper
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  1. PN Junction diode
  2. Zener diode
  3. Tunnel diode
  4. Schottky diode

Answer (Detailed Solution Below)

Option 3 : Tunnel diode
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Detailed Solution

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  • A tunnel diode is a type of semiconductor diode that has negative resistance due to the tunnelling effect
  • Their negative differential resistance in part of their operating range allows them to function as oscillators and amplifiers
  • The negative resistance region is the most important and most widely used characteristic of the tunnel diode, in this region the operating point is stable
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