电气英语证书考试(PEC)-电气基本术语和定义.doc

电气英语证书考试(PEC)-Glossary and Definitions of Basic Electrical and electronics Terms

A (amp)- Ampere
AC/DC-Alternating current or direct current
ADC -Analog-to-digital converter
AFT -Automatic fine tuning
AFC -Automatic flow controller, used in controlling the flow of gasses under pressure into a vacuum system
AGC-Automatic gain control
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
AC- Alternating current
A/D-Analog to digital
AF-Audio frequency
AFC -Automatic frequency control
Ah -Ampere hour
AM-Amplitude modulation
Ai -Current gain
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
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
G- Gravitational force
G -Conductance
G- Giga (109 )
JFET-Junction field effedt transistor
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
N -Number of turns in an inductor
N-Revolutions per minute
n-Nano (10-9)
N- Negative
NA- Nanoampere
NC- Normally closed
NCNo- connection
NEG, neg –Negative
NF-Nanofarad
nH -Nanohenry
nm- Nanometer
NO-Normally open
NPN- Negative-positive-negative
Ns- Nanosecond
NW- Nanowatt
OP AMP- Operational amplifier
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
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
TWT-Travelling wave tube
TV - Television
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
B -Flux density
BCD -Binary coded decimal
bfo -Beat frequency oscillator
BJT -Bipolar junction transistor
BW-Bandwidth
d- Deci (10-1)
D/A or D-A-Digital to analog
DC-Direct current
DIP-Dual in-line package
DMM -Digital multimeter
DPDT -Double pole double throw
DTL-Diode transistor logic
DVM-Digital voltmeter
– 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
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
K- Coefficient of coupling
k- Kilo (103 )
kHz- Kilohertz
kV- Kilovolt
kVA- Kilovoltampere
kW- Kilowatt
kWh-Kilowatt-hour
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
mW- Milliwatt
MOS -Metal oxide semiconductor
MOSFET -Metal oxide semiconductor field effect transistor
MPU- Microprocessor unit
MSI- Medium scale integrated circuit
mV –Millivolt
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
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
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
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
Vc-Capacitive voltage
VCE-DC voltage collector to emitter
VCO-Voltage controlled oscillator
VHF-Very high frequency
VIn -Input voltage
VL- Inductive voltage
VLF- Very low frequency
Vm, Vmax -Maximum voltage
VOM-Volt ohm milliameter
Vout -Output voltage
Vp -Primary voltage
VS-Source voltage
VSWR-Voltage standing wave ratio
VT-Total voltage