Discuss Forum
1. The device that exhibits negative resistance region is _____
- A. TTL
- B. TTL
- C. TTL
- D. TTL
Answer: Option D
Explanation:
A tunnel diode (also known as an Esaki diode) exhibits a negative resistance region. Other devices that also display this characteristic include the IMPATT diode, Gunn diode, and unijunction transistor (UJT).
- Tunnel Diode: A heavily doped PN junction diode that has a negative resistance region in its forward-bias I-V curve due to the quantum mechanical effect of tunneling.
- IMPATT Diode: A semiconductor diode used in microwave oscillators that exhibits negative resistance.
- Gunn Diode: Another type of semiconductor diode that has a region of negative resistance.
- Unijunction Transistor (UJT): A three-terminal semiconductor device that can operate in a negative resistance region after it is turned on.
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