Electronic Devices and Circuit Theory:: Special-Purpose Diodes

What kind of diode is formed by joining a doped semiconductor region with a metal?

A. laser
B. tunnel
C pin
D. Schottky

Which diode employs graded doping?

A. zener
B. LED
C tunnel
D. step-recovery

What diode is used in seven-segment displays?

A. zener
B. LED
C laser
D. Schottky

What type of diode maintains a constant current?

A. LED
B. zener
C current regulator
D. pin
E. none of the above

The process of emitting photons from a semiconductive material is called

A. photoluminescence.
B. gallium arsenide.
C electroluminescence.
D. gallium phosphide.

Page 1 of 5