1、电气英语证书考试(PEC)-Glossary and Definitions of Basic Electrical and electronics TermsA (amp)- Ampere AC/DC-Alternating current or direct current ADC -Analog-to-digital converterAFT -Automatic fine tuning AFC -Automatic flow controller, used in controlling the flow of gasses under pressure into a vacuum s
2、ystemAGC-Automatic gain control AM/FM -Amplitude modulation or Frequency modulation AMM -Analog multimeterantilog - AntilogarithmAp -Power gainApc-Automatic phase controlAv -Voltage gainAVC -Automatic volume control AWG -American wire gaugeAC- Alternating currentA/D-Analog to digitalAF-Audio frequen
3、cyAFC -Automatic frequency controlAh -Ampere hourAM-Amplitude modulationAi -Current gainc -Centi (10-2)C -Capacitance or capacitor CAD -Computer aided designCAM -Computer aided manufacture CATV -Cable TVCB -Common base configuration CB- Citizens bandCC -Common collector CE-Common emittercm Centimete
4、r cmil -Circular milCPU- Central processing unit C (Q)-CoulombCR cr -Junction diode CRO- Cathode ray OscilloscopeCRT -Cathode ray tube CT -Total capacitancecw -Continuous transmissionE DC- or Erms Difference in potentiale -Instantaneous difference in potential ECG- ElectrocardiogramECL -Emitter coup
5、led logic EHF- Extremely high frequencyEHV- Extra high voltage ELF- Extremely low frequencyEMF-Electromotive force EMI-Electromagnetic interferenceEW- Electronic warfareG- Gravitational forceG -ConductanceG- Giga (109 )JFET-Junction field effedt transistorL- Coil, inductanceLC- Inductance-capacitanc
6、eLCD- Liquid crystal displayL-C-R -Inductance-capacitance-resistanceLDR- Light-dependent resistorLED- Light emitting diodeLF- Low frequencyLM- Mutual inductanceLNA- Low noise amplifierLO -Local oscillatorLSI- Large scale integrationLT -Total inductanceN -Number of turns in an inductorN-Revolutions p
7、er minuten-Nano (10-9)N- NegativeNA- NanoampereNC- Normally closedNCNo- connectionNEG, neg NegativeNF-NanofaradnH -Nanohenrynm- NanometerNO-Normally openNPN- Negative-positive-negativeNs- NanosecondNW- NanowattOP AMP- Operational amplifierR-PotentiometerR- ResistanceRAM- Random access memoryRC- Resi
8、stance-capacitance, also Radio controlledRcvr-ReceiverRect- RectifierRef- ReferenceRf- Radio frequenciesRF-Radio frequenciesRFI-Radio frequency interferenceRL-Load resistorRLC- Resistance-capacitance-inductanceRMS, rms- Root mean squareROM-Read only memoryRpm- Revolutions per minuteT- Tera (1012)T -
9、TorqueT -Transformert- Time in secondsTC- Time constant, also temperature coefficientTE-Transverse electricTemp-TemperatureTHz-TerahertzTM-Transverse magneticTR-Transmit-receiveTTL-Transistor-transistor logicTWT-Travelling wave tubeTV - TelevisionW WattXC -Capacitive reactanceXL -Inductive reactance
10、Y -AdmittanceZ ImpedanceZin -Input impedanceZo -Output impedanceZp -Primary impedanceZs -Secondary impedanceZT -Total impedanceB -Flux densityBCD -Binary coded decimalbfo -Beat frequency oscillatorBJT -Bipolar junction transistorBW-Bandwidthd- Deci (10-1)D/A or D-A-Digital to analog DC-Direct curren
11、tDIP-Dual in-line package DMM -Digital multimeterDPDT -Double pole double throwDTL-Diode transistor logicDVM-Digital voltmeter FrequencyFET-Field effect transistorFF-Flip Flop fil -FilamentFM- Frequncy modulation fr -Frequency at resonancefsk -frequency-shift keying FSD- Full scale deflectionH- Henr
12、yH- Magnetic field intensityH -Magnetizing fluxh- hecto (102 )h -HybridHF- High frequencyhp -HorsepowerHz -Hertz I -Currenti -Instantaneous currentIB -DC Base currentIC -DC Collector currentIC- Integrated circuitIe- Total emitter currentIeff- Effective currentIF- Intermediate frequencyImax -Maximum
13、currentImin -Minimum currentI/O- Input/outputIR- InfraredIR- Resistor currentIS -Secondary currentIT -Total currentK- Coefficient of couplingk- Kilo (103 )kHz- KilohertzkV- KilovoltkVA- KilovoltamperekW- KilowattkWh-Kilowatt-hourM-Mega (106 )M -Mutual conductanceMI -Mutual inductancem- Milli (10-3 )
14、mA-Milliamperemag- Magnetronmax MaximumMF- Medium frequencyMH- MillihenryMHz -Megahertzmin Minimummm- Millimetermmf -Magnetomotive forcemW- MilliwattMOS -Metal oxide semiconductorMOSFET -Metal oxide semiconductor field effect transistorMPU- Microprocessor unitMSI- Medium scale integrated circuitmV M
15、illivoltP- Pico (10-12)P- Powerp- Instantaneous powerP- Positive, also peakPA- Public address or power amplifierPA- PicoamperePAL- Programmable Array LogicPAM, pam- Pulse amplitude modulationPap-Apparent powerPav-Average powerPCB- Printed circuit boardPCM, pcm-Pulse-code modulationPDM-Pulse-duration
16、 modulationPF-PicofaradPLD-Programmable Logic DevicePLL-Phase locked loopPM- Phase modulation, also Permanent magnetPNP-Positive-negative-positivePOT, pot-PotentiometerP-P-Peak to peakPPM- Pulse-position modulationPRF-Pulse repetition frequencyPRT-Pulse repetition timePw- Pulse widthPWM, pwm- Pulse
17、width modulationQ-Charge, also qualityq-Instantaneous chargeSCR-Silicon controlled rectifierSHF-Super high frequencySIP-Single in-line packageSNR-Signal-to-noise ratioSPDT-Single pole double throwsq cm- Square centimeterSSB- Single sidebandSW-Short waveSWR-Standing-wave ratioSYNC, sync-SynchronousUH
18、F- Ultra high frequencyUHV-Ultra high voltageUJT-Unijunction transistorUV-UltravioletV- Vacuum tubeV, v-Voltv- Instantaneous voltageVA- Volt ampereVav-Voltage (average value)VBE-DC voltage base to emitterVc-Capacitive voltageVCE-DC voltage collector to emitterVCO-Voltage controlled oscillator VHF-Very high frequencyVIn -Input voltageVL- Inductive voltageVLF- Very low frequencyVm, Vmax -Maximum voltageVOM-Volt ohm milliameterVout -Output voltageVp -Primary voltageVS-Source voltageVSWR-Voltage standing wave ratioVT-Total voltage
