What is a diode

A

Germanium

B

Silicon

C

Gallium Arsenide

R

Compound materials

A

Diode – low power or signal

B

Diode – variable capacitance

C

Transistor – audio frequency, low power

D

Transistor – audio frequency, power

E

Tunnel diode

F

Transistor – high frequency, low power

G

Miscellaneous devices

H

Diode – sensitive to magnetism

L

Transistor – high frequency, power

N

Photocoupler

P

Light detector

Q

Light emitter

R

Switching device, low power, e.g. thyristor, diac, unijunction

S

Transistor – switching low power

T

Switching device, low power, e.g. thyristor, triac

U

Transistor – switching, power

W

Surface acoustic wave device

X

Diode multiplier

Y

Diode rectifying

Z

Diode – voltage reference