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Consider the following diodes: 1. Gunn diode 2. Schottky diode 3. Crystal diode 4. Tunnel diode Which of these can be used as detector diodes?

Consider the following diodes: 1. Gunn diode 2. Schottky diode 3. Crystal diode 4. Tunnel diode Which of these can be used as detector diodes? Correct Answer 2 and 4 only

  • A detector is a two-terminal device that is used to rectify an RF signal (like a diode rectifies an alternating current signal in a power supply).
  • Detectors are used as the receiving element in amplitude modulation schemes.
  • Diodes used in detectors can be Schottky or Esaki tunnel diodes.

Important Points

1. Tunnel diode is a heavily doped PN junction that shows negative resistance characteristics.

2. Schottky diode is a metal-semiconductor diode that has a very fast switching speed.

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