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Last Updated:
Wednesday June 17, 2009 |
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A (amp)
- Ampere
-
AC
- Alternating current
-
AC/DC
- Alternating current or direct current
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A/D
- Analog to digital
-
ADC
- Analog-to-digital converter
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AF
- Audio frequency
-
AFT
- Automatic fine tuning
-
AFC
- Automatic frequency control
-
AFC
- Automatic flow controller, used in
controlling the flow of gasses under
pressure into a vacuum system
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AGC
- Automatic gain control
-
Ah
- Ampere hour
-
Ai
Current gain
AM
Amplitude modulation
AM/FM
Amplitude modulation or Frequency
modulation
AMM
Analog multimeter
antilog
Antilogarithm
Ap
Power gain
apc
Automatic phase control
Av
Voltage gain
AVC
Automatic volume control
AWG
American wire gauge
B
Flux density
BCD
Binary coded decimal
bfo
Beat frequency oscillator
BJT
Bipolar junction transistor
BW
Bandwidth
c
Centi (10-2)
C
Capacitance or capacitor
CAD
Computer aided design
CAM
Computer aided manufacture
CATV
Cable TV
CB
Common base configuration
CB
Citizen's band
CC
Common collector
CE
Common emitter
cm
Centimeter
cmil
Circular mil
CPU
Central processing unit
C (Q)
Coulomb
CR cr
Junction diode
CRO
Cathode ray oscilloscope
CRT
Cathode ray tube
CT
Total capacitance
cw
Continuous transmission
d
Deci (10-1)
D/A or D-A
Digital to analog
DC
Direct current
Di or Di
Change in current
DIP
Dual in-line package
DMM
Digital multimeter
DPDT
Double pole double throw
Dt or Dt
Change in time
DTL
Diode transistor logic
Dv or Dv
Change in voltage
DVM
Digital voltmeter
E DC or Erms
Difference in potential
e
Instantaneous difference in potential
ECG
Electrocardiogram
ECL
Emitter coupled logic
EHF
Extremely high frequency
EHV
Extra high voltage
ELF
Extremely low frequency
EMF
Electromotive force
EMI
Electromagnetic interference
EW
Electronic warfare
- f
Frequency
FET
Field effect transistor
FF
Flip Flop
fil
Filament
FM
Frequncy modulation
fr
Frequency at resonance
fsk
frequency-shift keying
FSD
Full scale deflection
G
Gravitational force
G
Conductance
G
Giga (109 )
H
Henry
H
Magnetic field intensity
H
Magnetizing flux
h
hecto (102 )
h
Hybrid
HF
High frequency
hp
Horsepower
Hz
Hertz
I
Current
i
Instantaneous current
IB
DC Base current
IC
DC Collector current
IC
Integrated circuit
Ie
Total emitter current
Ieff
Effective current
IF
Intermediate frequency
Imax
Maximum current
Imin
Minimum current
I/O
Input/output
IR
Infrared
IR
Resistor current
IS
Secondary current
IT
Total current
JFET
Junction field effedt transistor
K
Coefficient of coupling
k
Kilo (103 )
kHz
Kilohertz
kV
Kilovolt
kVA
Kilovoltampere
kW
Kilowatt
kWh
Kilowatt-hour
L
Coil, inductance
LC
Inductance-capacitance
LCD
Liquid crystal display
L-C-R
Inductance-capacitance-resistance
LDR
Light-dependent resistor
LED
Light emitting diode
LF
Low frequency
LM
Mutual inductance
LNA
Low noise amplifier
LO
Local oscillator
LSI
Large scale integration
LT
Total inductance
M
Mega (106 )
M
Mutual conductance
MI
Mutual inductance
m
Milli (10-3 )
mA
Milliampere
mag
Magnetron
max
Maximum
MF
Medium frequency
mH
Millihenry
MHz
Megahertz
min
Minimum
mm
Millimeter
mmf
Magnetomotive force
MOS
Metal oxide semiconductor
MOSFET
Metal oxide semiconductor field effect
transistor
MPU
Microprocessor unit
MSI
Medium scale integrated circuit
mV
Millivolt
mW
Milliwatt
-
N
- Number of turns in an inductor
-
N
- Revolutions per minute
-
n
- Nano (10-9)
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N
- Negative
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nA
- Nanoampere
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NC
- Normally closed
-
NC
- No connection
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NEG, neg
- Negative
-
nF
- Nanofarad
-
nH
- Nanohenry
-
nm
- Nanometer
-
NO
- Normally open
-
NPN
- Negative-positive-negative
-
ns
- Nanosecond
-
nW
- Nanowatt
-
OP AMP
- Operational amplifier
-
P
- Pico (10-12)
-
P
- Power
-
p
- Instantaneous power
-
P
- Positive, also peak
-
PA
- Public address or power amplifier
-
pA
- Picoampere
-
PAL
- Programmable Array Logic
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PAM, pam
- Pulse amplitude modulation
-
Pap
Apparent power
Pav
Average power
PCB
Printed circuit board
PCM, pcm
Pulse-code modulation
PDM
Pulse-duration modulation
pF
Picofarad
PLD
Programmable Logic Device
PLL
Phase locked loop
PM
Phase modulation, also Permanent
magnet
PNP
Positive-negative-positive
POT, pot
Potentiometer
P-P
Peak to peak
PPM
Pulse-position modulation
PRF
Pulse repetition frequency
PRT
Pulse repetition time
pw
Pulse width
PWM, pwm
Pulse width modulation
Q
Charge, also quality
q
Instantaneous charge
R
Potentiometer
R
Resistance
RAM
Random access memory
RC
Resistance-capacitance, also Radio
controlled
rcvr
Receiver
rect
Rectifier
ref
Reference
rf
Radio frequencies
RF
Radio frequencies
RFI
Radio frequency interference
RL
Load resistor
RLC
Resistance-capacitance-inductance
RMS, rms
Root mean square
ROM
Read only memory
rpm
Revolutions per minute
SCR
Silicon controlled rectifier
SHF
Super high frequency
SIP
Single in-line package
SNR
Signal-to-noise ratio
SPDT
Single pole double throw
sq cm
Square centimeter
SSB
Single sideband
SW
Short wave
SWR
Standing-wave ratio
SYNC, sync
Synchronous
T
Tera (1012)
T
Torque
T
Transformer
t
Time in seconds
TC
Time constant, also temperature
coefficient
TE
Transverse electric
temp
Temperature
THz
Terahertz
TM
Transverse magnetic
TR
Transmit-receive
TTL
Transistor-transistor logic
TV
Television
TWT
Travelling wave tube
-
UHF
- Ultra high frequency
-
UHV
- Ultra high voltage
-
UJT
- Unijunction transistor
-
UV
- Ultraviolet
-
V
- Vacuum tube
-
V, v
- Volt
-
v
- Instantaneous voltage
-
VA
- Volt ampere
-
Vav
- Voltage (average value)
-
VBE
- DC voltage base to emitter
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Vc
- Capacitive voltage
-
VCE
- DC voltage collector to emitter
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VCO
- Voltage controlled oscillator
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VHF
- Very high frequency
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Vin
- Input voltage
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VL
- Inductive voltage
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VLF
- Very low frequency
-
Vm,
Vmax
- Maximum voltage
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VOM
- Volt ohm milliameter
-
Vout
- Output voltage
-
Vp
- Primary voltage
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VS
- Source voltage
-
VSWR
- Voltage standing wave ratio
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VT
- Total voltage
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W
- Watt
-
XC
- Capacitive reactance
-
XL
- Inductive reactance
-
Y
- Admittance
-
Z
- Impedance
-
Zin
- Input impedance
-
Zo
- Output impedance
-
Zp
- Primary impedance
-
Zs
- Secondary impedance
-
ZT
- Total impedance
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