Electronic Devices-Special-Purpose Diodes
Electronic Devices-Special-Purpose Diodes
11. What diode operates only with majority carriers?
- laser
- tunnel
- Schottky
- step-recovery
14. Zener diodes with breakdown voltages greater than 5 V operate predominantly in what type of breakdown?
- avalanche
- zener
- varactor
- Schottky
15. Back-to-back varactor diodes are used for what reason?
- over-voltage protection
- a wider tuning range
- to eliminate harmonic distortion
- no reason; only zeners are used in a back-to-back configuration
16. A tunnel diode is used
- in high-power circuits.
- in circuits requiring negative resistance.
- in very fast-switching circuits.
- in power supply rectifiers.
17. What type of diode is commonly used in electronic tuners in TVs?
- varactor
- Schottky
- LED
- Gunn
18. A laser diode normally emits
- coherent light.
- monochromatic light.
- coherent and monochromatic light.
- neither coherent nor monochromatic light.
19. A varactor is a pn junction diode that always operates in ________-bias and is doped to ________ the inherent capacitance of the depletion region.
- forward, maximize
- reverse, maximize
- reverse, minimize
- forward, minimize