Specifications
19
4.0 Glossary (General Denitions and Symbols)
SECTION 4 GLOSSARY
GROUND
T n
L n
L n
SILICON
D n
D n
D n
SW n
F n
ELECTROLITIC
RESISTOR
DESCRIPTION
Wound wire device; current through the coil generates a electro-
magnetic field causing inductive reactance, which increases with
number of turns and density.
Adding a core to a coil increases the inductance produced.
Wound wire device with a primary and secondary coil(s) which increases
or decreases voltage applied to the primary based on coil and core
configuration. 1:1 transformers are used for isolation.
Identifies the earth (ground) connection. NOTE: Not for a protective
earth connection.
OCV
Amperage
Volts
Resistance
A measure of Power. Watts = V*A
+ Positive element of device.
- Negative element of device - the banded end of a diode.
Device which opens and closes a circuit.
A semi-conductor that conducts in only one direction
Semiconductor diode that emits light when conducting current
Device having primary and secondary inductors for altering a-c signal
amplitudes, impedance matching,and isolation purposes. . A reverse
blocking triode thyristor
A diode that permits high current flow without damage, the reverse
voltage remains almost constant over a wide range of currents, used
esp. to regulate voltage.
Device in series with a load which opens the circuit if its current
rating (A) is exceeded.
Component that opposes current flow proportionately to its Ohm (Ω)
rating. Power dissapation is expressed in Watts (Ω).
Electrolitic capacitors will be damaged if polarity is not correct. Capaci-
tors can charge themselves from ambient electric fields and should be
handled with caution.
Stores energy in the electrostatic field generated between two metal
plates separated by an insulator. Typical values are in F.
SYMBOL
µ
n
A
V
R
W
BIAS
ANODE:
CATHODE:
+
-
C n
+
A voltage used to control or stabilize an electronic circuit. A forward bias
is voltage applied in the direction of the current flow within a transistor,
tube or circuit. A reverse bias is voltage applied in the opposite
direction.
Watt
n
n
n
n
n VOLTS
Number
micro 0.00000n
Open Circuit Voltage:
Indicates that any number may be used in its place.
One Millionth of any unit.
F Farad n Amount of electrical storage in a capacitor.
C n CAPACITOR F
µ
µ
CAPACITOR
F
µ
R n
Ω
, W
Opposition to electron transfer: expressed in OHMS.
FUSE n A, n V
Current: effectively the "amount of flow" of electricity.
Electromotive force: effectively the "pressure" of electron movement.
SWITCH
n A, n V
n P, n T
DIODE
ZENER DIODE
LIGHT EMITTING
DIODE
RECTIFIER
CONTROLLEDSCR
COIL
COIL (Iron Core)
TRANSFORMER
NOTATION
NAME VALUES
- +
or
CONTENTS