|
ľA |
Microampere (average) |
|
ľa |
Microampere (peak) |
|
A |
Ampere (AC rms or DC) |
|
a |
Ampere (peak) |
|
A (amp) |
Ampere |
|
A/D |
Analog to digital |
|
AC |
Alternating current |
|
AC/DC |
Alternating current or direct
current |
|
ADC |
Analog-to-digital converter |
|
AF |
Audio frequency |
|
AFC |
Automatic frequency control |
|
AFC |
Automatic flow controller,
used in controlling the flow of gasses under
pressure into a vacuum system |
|
AFT |
Automatic fine tuning |
|
AGC |
Automatic gain control |
|
Ah |
Ampere hour |
|
i |
Current gain |
|
AM |
Amplitude modulation |
|
AM/FM |
Amplitude modulation or
Frequency modulation |
|
AMM |
Analog multimeter |
|
antilog |
Antilogarithm |
|
p |
Power gain |
|
apc |
Automatic phase control |
|
v |
Voltage gain |
|
AVC |
Automatic volume control |
|
AWG |
American wire gauge |
|
B |
Flux density |
|
B |
Base electrode |
|
BCD |
Binary coded decimal |
|
bfo |
Beat frequency oscillator |
|
BJT |
Bipolar junction transistor |
|
BV |
Breakdown voltage |
|
BVCEO |
Breakdown voltage,
collector-to-emitter junction reverse biased (base
open) |
|
BVCER |
Breakdown voltage,
collector-to-emitter junction reverse biased
(specified resistance) |
|
BVCES |
Breakdown voltage,
collector-to-emitter junction reverse biased (base
shorted) |
|
BVCEX |
Breakdown voltage,
collector-to-emitter junction reverse biased
(base-emitter back biased) |
|
BVCOB |
Breakdown voltage,
collector-to-base junction reverse biased (emitter
open) |
|
BW |
Bandwidth |
|
c |
Centi (10-2) |
|
C |
Capacitance or capacitor |
|
C |
Capacitance; collector
electrode |
|
C (Q) |
Coulomb |
|
C(dep) |
Depletion layer capacitance |
|
C(dif) |
Diffusion capacitance |
|
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 |
|
Ce |
Internal collector junction
capacitance. |
|
Cib |
Input Capacitance, common base |
|
CL |
Load capacitance |
|
cm |
Centimeter |
|
cmil |
Circular mil |
|
Cob |
Output capacitance, common
base |
|
Coe |
Output capacitance, common
emitter |
|
CPU |
Central processing unit |
|
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 |
Instantaneous difference in
potential |
|
E |
Emitter electrode |
|
E DC or E rms |
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 |
|
fab |
Common base small-signal
short-circuit forward current transfer-ratio cutoff
frequency (emitter input) |
|
fae |
Common emitter small-signal
short-circuit forward current transfer-ratio cutoff
frequency |
|
FET |
Field effect transistor |
|
FF |
Flip Flop |
|
fil |
Filament |
|
FM |
Frequncy modulation |
|
fosc |
Maximum frequency of
oscillation |
|
fpg |
Power gain cutoff frequency |
|
fr |
Frequency at resonance |
|
fref |
Reference frequency |
|
FSD |
Full scale deflection |
|
fsk |
frequency-shift keying |
|
G |
Gravitational force |
|
G |
Conductance |
|
G |
Giga (109 ) |
|
Gb |
Power gain (common base) |
|
Gc |
Power gain (common collector) |
|
Ge |
Power gain (common emitter) |
|
gm |
Small-signal transconductance |
|
gM, gFE |
Static or DC transconductance |
|
GM, GFE |
Large-signal transconductance |
|
H |
Henry |
|
H |
Magnetic field intensity |
|
H |
Magnetizing flux |
|
h |
hecto (102) |
|
h |
Hybrid |
|
HF |
High frequency |
|
hfb |
Common base small signal
short-circuit forward current transfer-ratio |
|
hfe |
Common emitter small-signal
short-circuit forward current transfer-ratio (base
input) |
|
hFE |
Common emitter DC
short-circuit forward current transfer-ratio current
gain (IC / IB) |
|
HFE |
Common emitter large-signal
short-circuit forward current transfer-ratio |
|
hib |
Common base small-signal
short-circuit input impedance (emitter input) |
|
hie |
Common emitter small-signal
short-circuit input impedance (base input) |
|
hob |
Common base small-signal
open-circuit output admittance (emitter input) |
|
hoc |
Common collector small-signal
open-circuit output admittance (base input) |
|
hoe |
Common emitter small-signal
open-circuit output admittance (base input) |
|
hp |
Horsepower |
|
hrb |
Common base small signal
open-circuit reverse transfer voltage ratio (emitter
input) |
|
hrc |
Common collector small signal
open-circuit reverse transfer voltage ratio (base
input) |
|
hre |
Common emitter small signal
open-circuit reverse transfer voltage ratio (base
input) |
|
Hz |
Hertz |
|
I |
Current |
|
i |
Instantaneous current |
|
I/O |
Input/output |
|
IB |
Average base current (DC) |
|
Ib |
Instantaneous base current (AC
rms) |
|
ib |
Base current (peak) |
|
IB |
DC Base current |
|
IC |
Integrated circuit |
|
IC |
Collector current (DC) |
|
Ic |
Collector current (AC rms) |
|
ic |
Collector current (peak) |
|
IC |
DC Collector current |
|
ICBO, ICO |
Collector cutoff current
(emitter open) |
|
ICEO |
Collector cutoff current (base
open) |
|
ICER |
Collector cutoff current
(specified resistance base-emitter) |
|
ICERV |
Collector cutoff current
(reverse voltage on base) |
|
IE |
Average emitter current (DC) |
|
Ie |
Instantaneous emitter current
(AC rms) |
|
ie |
Instantaneous emitter current
(peak) |
|
Ie |
Total emitter current |
|
IEBO |
Emitter cutoff current
(collector open) |
|
Ieff |
Effective current |
|
IF |
Intermediate frequency |
|
IF |
Forward current (DC) |
|
iF |
Forward current (DC) |
|
iFr |
Forward recovery current
(specified instantaneous value) |
|
Imax |
Maximum current |
|
Imin |
Minimum current |
|
IO |
Output current (DC) |
|
IR |
Infrared |
|
IR |
Reverse current (DC) |
|
iR |
Reverse current (peak) |
|
IR |
Resistor current |
|
iRr |
Reverse recovery current
(specified instantaneous value) |
|
IS |
Secondary current |
|
isurge |
Surge current |
|
IT |
Total current |
|
IZ |
Average Zener current |
|
iZ |
Instantaneous Zener current
(AC rms) |
|
IZK |
Zener knee current |
|
IZM |
Zener maximum current |
|
IZT |
Zener test current |
|
JFET |
Junction field effedt
transistor |
|
K |
Coefficient of coupling |
|
k |
Kilo (103) |
|
K |
Kilohm |
|
kHz |
Kilohertz |
|
kV |
Kilovolt |
|
kVA |
Kilovoltampere |
|
kW |
Kilowatt |
|
kWh |
Kilowatt-hour |
|
L |
Coil, inductance |
|
LC |
Inductance-capacitance |
|
LC |
Conversion loss |
|
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 |
|
m |
Milli (10-3 ) |
|
mA |
Milliampere |
|
mA |
Milliampere (average) |
|
ma |
Milliampere (peak) |
|
mAa-c |
Milliampere (AC rms) |
|
mAd-c |
Milliampere (DC) |
|
mag |
Magnetron |
|
max |
Maximum |
|
MF |
Medium frequency |
|
mH |
Millihenry |
|
MHz |
Megahertz |
|
MI |
Mutual inductance |
|
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 |
|
mW |
Milliwatt (Max., Average, or
rms) |
|
mw |
Milliwatt (peak) |
|
N |
Number of turns in an inductor |
|
N |
Revolutions per minute |
|
n |
Nano (10-9) |
|
N |
Negative |
|
nA |
Nanoampere |
|
NC |
Normally closed |
|
NC |
No connection |
|
NEG, neg |
Negative |
|
nF |
Nanofarad |
|
NF |
Noise figure |
|
nH |
Nanohenry |
|
nm |
Nanometer |
|
NO |
Normally open |
|
NPN |
Negative-positive-negative |
|
ns |
Nanosecond |
|
nsec |
Nanosecond (Millimicrosecond) |
|
nW |
Nanowatt |
|
OP AMP |
Operational amplifier |
|
P |
Pico (10-12) |
|
P |
Power |
|
p |
Instantaneous power |
|
P |
Positive, also peak |
|
P |
Power dissipation of all
terminals (average total) |
|
p |
Power dissipation of all
terminals (peak) |
|
PA |
Public address or power
amplifier |
|
pA |
Picoampere |
|
PAL |
Programmable Array Logic |
|
PAM, pam |
Pulse amplitude modulation |
|
Pap |
Apparent power |
|
Pav |
Average power |
|
Pb |
Power dissipation of base
(average) |
|
pb |
Power dissipation of base
(peak) |
|
Pc |
Power dissipation of collector
(average) |
|
pc |
Power dissipation of collector
(peak) |
|
PCB |
Printed circuit board |
|
PCM, pcm |
Pulse-code modulation |
|
Pd |
Power dissipation of device
(average) |
|
PDM |
Pulse-duration modulation |
|
Pe |
Power dissipation of emitter
(average) |
|
pe |
Power dissipation of emitter
(peak) |
|
pF |
Picofarad |
|
PIV |
Peak inverse voltage |
|
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 |
|
Q |
Transistor |
|
R |
Potentiometer |
|
RAM |
Random access memory |
|
RB |
External base resistance |
|
rb', rBB' |
Internal base spreading
resistance |
|
RC |
Resistance-capacitance, also
Radio controlled |
|
RC |
External collector resistance |
|
rcvr |
Receiver |
|
RE |
External emitter resistance |
|
rect |
Rectifier |
|
ref |
Reference |
|
rf |
Radio frequencies |
|
RF |
Radio frequencies |
|
RFI |
Radio frequency interference |
|
RL |
Load resistor |
|
RL |
Resistance, load |
|
RLC |
Resistance-capacitance-inductance |
|
RMS, rms |
Root mean square |
|
ROM |
Read only memory |
|
rpm |
Revolutions per minute |
|
Rsat |
Saturation resistance |
|
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 |
|
T |
Temperature |
|
t |
Time |
|
TA |
Temperature, ambient |
|
TC |
Time constant, also
temperature coefficient |
|
TC |
Temperature, case |
|
TCBV |
Temperature coefficient of
breakdown voltage |
|
td |
Pulse delay time |
|
TE |
Transverse electric |
|
temp |
Temperature |
|
tf |
Pulse fall time |
|
tfr |
Forward recovery time |
|
THz |
Terahertz |
|
Tj |
Junction temperature |
|
TM |
Transverse magnetic |
|
tP |
Pulse time |
|
TR |
Transmit-receive |
|
tr |
Pulse rise time |
|
ts |
Pulse storage time |
|
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 |
Instantaneous voltage |
|
V |
Volt (DC) |
|
v |
Volt (peak) |
|
V, v |
Volt |
|
VA |
Volt ampere |
|
Va-c |
Volt (AC) |
|
Vav |
Voltage (average value) |
|
VBB |
Base voltage (DC) supply |
|
VBE |
DC voltage base to emitter |
|
VBE |
Emitter voltage (DC) (base to
emitter) |
|
Vc |
Capacitive voltage |
|
VCC |
Collector voltage (DC) supply |
|
VCE |
DC voltage collector to
emitter |
|
VCEsat |
Collector to emitter
saturation voltage |
|
VCO |
Voltage controlled oscillator |
|
VEC |
Emitter voltage (DC) (emitter
to collector) |
|
VEE |
Emitter voltage (DC) supply |
|
VF |
Forward voltage drop |
|
Vfe |
Floating potential |
|
VHF |
Very high frequency |
|
Vin |
Input voltage |
|
VL |
Inductive voltage |
|
VLF |
Very low frequency |
|
Vm, Vmax |
Maximum voltage |
|
VO |
Output voltage (DC) |
|
vO |
Output voltage (DC) |
|
VOM |
Volt ohm milliameter |
|
Vout |
Output voltage |
|
Vp |
Primary voltage |
|
VPT |
Voltage, punch-through |
|
VR |
Reverse voltage (DC) |
|
Vr |
Reverse voltage (peak) |
|
VS |
Source voltage |
|
VSWR |
Voltage standing wave ratio |
|
VT |
Total voltage |
|
VZ |
Zener voltage |
|
W |
Watt |
|
W |
Watts (Max., Average, or rms) |
|
w |
Watts (peak) |
|
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 |
|
Zz |
Zener impedance |
|
Zzk |
Zener impedance, knee |
|
Zzt |
Zener impedance, test |
