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Abbrevations
Electronics Dictonary
Components
Basic Electronics
Digital Electronics
Fiber Optic Demo's

DICTIONARY FOR ELECTRONIC TERMS

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z


A :
Abbreviation for "ampere" a unit of electrical current.

Absorption:
Loss or dissipation of energy as it travels through a medium, Example: radio waves lose some of their energy as they travel through the atmosphere.

AC :
Abbreviation for "Alternating Current"

Acceptor atoms :
Trivalent atoms that accept free electrons from pentavalent atoms.

AC coupling :
Circuit that passes an AC signal while blocking a DC voltage.

AC/DC :
Equipment that will operate on either an AC or DC power source.

AC generator :
Device used to transform mechanical energy into AC electrical power.

AC load line :
A graph representing all possible combinations of AC output voltage and current for an amplifier.

AC power supply :
Power supply that delivers an AC voltage.

Active component :
A component that changes the amplitude of a signal between input and output.

Active filter :
A filter that uses an amplifier in addition to reactive components to pass or reject selected frequencies.

Active region:
The region of BJT operation between saturation and cutoff used for linear amplification.

AC voltage:
A voltage in which the polarity alternates.

ADC :
Abbreviation for "analog to digital converter"

Admittance :
(symbol "Y") Measure of how easily AC will flow through a circuit. Admittance is the reciprocal of impedance and is measured in siemens.

AF :
Abbreviation for "audio frequency".

AFC :
Abbreviation for "automatic frequency control".

AGC:
Abbreviation for "automatic gain control"

Alkaline cell :
A primary cell that delivers more current than a carbon-zinc cell. Also known as an "alkaline manganese cell".

Alligator clip :
Spring clip on the end of a test lead used to make a temporary connection.

Alpha :
Ratio of collector current to emitter current in a bipolar junction transistor (BJT). Greek letter alpha "a" is the symbol used.

Alternating current :
An electric current that rises to a maximum in one direction, falls back to zero and then rises to a maximum in the opposite direction and then repeats.

Alternator :
Name for an AC generator.

AM :
Abbreviation for "amplitude modulation"

Ammeter :
A meter used to measure current.

Ampere :
Unit of electrical current.

Amplifier :
A circuit that increases the voltage, current, or power of a signal.

Amplitude:
Magnitude or size of a signal voltage or current.

Analog :
Information represented as continously varying voltage or current rather than in discrete levels as opposed to digital data varying between two discrete levels.

Anode :
The positive electrode or terminal of a device. The "P" material of a diode.

Antenna transmitting:
A device that converts an electrical wave into an electromagnetic wave that radiates away from the antenna.

Antenna receiving :
A device that converts a radiated electromagnetic wave into an electrical wave.

Apparent power :
Power attained in an AC circuit as a product of effective voltage and current which reach their peak at different times.

Arc :
Discharge of electricity through a gas such as lightning discharging through the atmosphere.

Armature:
The rotating or moving component of a magnetic circuit.


Armstrong oscillator :
An oscillator that uses an isolation transformer to achieve positive feedback from output to input.

Astable multivibrator:
An oscillator that produces a square wave output from a DC voltage.

Atom :
The smallest particle that an element can be broken down into and still maintain its unique identity.

Atomic number :
The number of positive charges or protons in the nucleus of an atom.

Attenuate :
To reduce the amplitude of an action or signal. The opposite of amplification.Audio Relating to frequencies that can be heard by the human ear. Approximately 20 Hz. to 20 kHz.

Autotransformer:
A single winding transformer where the output is taken from taps on the winding.

Average value :
A value of voltage or current where the area of the wave above the value equals the area of the wave below the value.

AVC :
Abbreviation for "automatic volume control"

Avionics:
Aviation electronics.

AWG :
Abbreviation for "american wire gauge". A gauge that assigns a number value to the diameter of a wire.

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