Day 3 Notes Flashcards
(30 cards)
Capacitor defined
AN ELECTRONIC COMPONENT THAT CAN “STORE” AN ELECTRICAL CHARGE.
THE LEVEL OF STORED CHARGE IS BASED ON THE______________ OF THE CAPACITOR.
Capacitance
THE UNIT OF MEASURE FOR CAPACITANCE
” FARAD”
Capacitor is expressed
In microfarads 10^-6
Capacitor Schematic symbols
Non-polarized (disc)
Polarized (electrolytic)
Variable
Capacitor applications
Non-polarized (disc)
Polarized (electrolytic)
Variable
Non-polarized (disc)
Block DC
Frequency filters
Polarized (electrolytic)
Power supply filters
Variable
Calibration
Audio circuits
Tx Rx
CAPACITOR CONSTRUCTION:
•
TYPICALLY TWO METAL PLATES SEPERATED
BY AN INSULATING MATERIAL CALLED
THE DIELECTRIC-
FACTORS THAT DETERMINE THE CAPACITANCE OF A CAPACITOR:
THE PLATE SIZE
The distance BETWEEN THE PLATES
THE TYPE OF DIELECTRIC MATERTAL USED
THE TYPE OF DIELECTRIC MATERTAL USED
• AIR - 1
• 0il/PAPER - 5
MICA - 6
GLASS - 8
TANTALUM -25
CERAMIC - 1,200
ALL DIELECTRIC MATERIAl ARE COMPARED TO
Air
DISC (non-polarized) CAPACITOR VALUE Identification IN:
PICOFARADS
DISC CAPACITORS USE A ____ _______ CODE
3 DIGIT
2 PRIMARY DIGITS, 1 MULTIPLIER
Disc capacitor 334 is
33,000 pf
.330 microfarads
ELECTROLYTIC(polarized) CAPACITORS TYPICALLY HAVE THEIR CAPACITANCE __________ RIGHT ON THE BODY OF THE CAPACITOR ALREADY CONVERTED TO MICROFARADS and the
CAPACITORS “____________ _____________”
PRINTED
Working voltage
WORKING VOLTAGE:
IS THE MAXIMUM CONTINUOUS VOLTAGE THAT CAN BE APPLIED BEFORE FAILURE.
Working voltage AC
RMS voltage
Working voltage DC
EA-volts
WDC
Working voltage
CAPACITORS MAY BE USED IN ELECTRONICS
To block DC and pass AC
IN DC CIRCUITs, CAPACITORS ARE BOUND BY “.
NEWTON’S THIRD LAW OF MOTION”
DIRECT CURRENT WILL flow
“EXTERNAL” TO THE CAPACITOR
Until THE CAPACITOR IS CHARGED
EQUAL TO EA
THEN CURRENT CEASES TO FLOW.
What is this called
SATURATION”
