SPECIAL- PURPOSE DIODES Flashcards
Schottky diodes are also known as
hot carrier diodes.
Zener diodes with breakdown
voltages less than 5 V operate
predominantly in what type of
breakdown?
zener
The Schottky diode is used
in very fast-switching circuit
You have an application for a diode to
be used in a tuning circuit. A type of
diode to use might be
a varactor.
What kind of diode is formed by
joining a doped semiconductor region
with a metal?
schottky
Which diode employs graded doping?
step-recovery
LEDs are made out of
gallium
The normal operating region for a
zener diode is the
reverse-breakdown region.
An LED is forward-biased. The diode
should be on, but no light is showing. A
possible trouble might be
the diode is open
A 6.2 V zener is rated at 1 watt. The
maximum safe current the zener can
carry is
161mA
The process of emitting photons
from a semiconductive material is called
electroluminescence.
An 8.2 V zener has a resistance of
5Ω. The actual voltage across its
terminals when the current is 25 mA is
8.325 V.
What diode operates only with
majority carriers?
Schottky
What type of diode maintains a
constant current?
current regulator
What diode is used in seven-segment
displays?
LED
Zener diodes with breakdown
voltages greater than 5 V operate
predominantly in what type of
breakdown?
avalanche
Back-to-back varactor diodes are
used for what reason?
to eliminate harmonic
distortion
A tunnel diode is used
in circuits requiring negative
resistance.
What type of diode is commonly
used in electronic tuners in TVs?
varactor
A laser diode normally emits
coherent and monochromatic
light.
A varactor is a pn junction diode that
always operates in ________-bias and is
doped to ________ the inherent
capacitance of the depletion region.
reverse, maximize
