PEC电气工程专业英语证书考试-电气基本术语和定义.doc

PEC电气工程专业英语证书考试-Glossary and Definitions of Basic Electrical and electronics Terms

Electronics is the branch of science that deals with the study of flow and control of electrons (electricity) and the study of their behavior and effects in vacuums, gases, and semiconductors, and with devices using such electrons. This control of electrons is accomplished by devices that resist, carry, select, steer, switch, store, manipulate, and exploit the electron.
Here are the Most Commonly Terms and definitions used in Electronics and Electronics Engineering:

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