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Electronics Glossery

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 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

Group of two or more insulated wires.

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Abbreviation for "computer aided design"

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To adjust the correct value of a reading by comparison to a standard.

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1) The ability of a conductor or dielectric to store electric charge.
2) The ability of a capacitor to store an electrical charge. The basic unit of capacitance is the Farad.

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Source:www.the12volt.com/glossary/glossary.asp
Source:http://www.twysted-pair.com/dictionary.htm

The opposition to current flow provided by a capacitor. Capacitive reactance is measured in ohms and varies inversly with frequency.

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Microphone whose operation depends on variations in capacitance caused by varying air pressure on the movable plate of a capacitor.

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1) (polarized) An electrical circuit element used to store charge temporarily, consisting in general of two metallic plates separated by a dielectric.
2) (non-polarized) A crossover component used to filter out lower requencies and allow higher frequencies to pass.
3) An electronic component having capacitive reactance.

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Source:www.the12volt.com/glossary/glossary.asp
Source:http://www.twysted-pair.com/dictionary.htm

Expressed in decibels, with the smaller the number the better. The ratio of captured signals of different strength on the same frequency.

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Source:www.the12volt.com/glossary/glossary.asp

Microphone whose operation depends on pressure variation in carbon granules causing a change in resistance.

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Resistor of fixed value made by mixing carbon granules with a binder which is moulded and then baked.

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Device made by depositing a thin carbon film on a ceramic form.

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An amplifier with two or more stages arranged in a series configuration.

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A high frequency amplifier made up of a common-source amplifier with a common-gate amplifier in its drain network.

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Vacuum tube used to display data in a visual form. Picture tube of a television or computer terminal.

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The negative terminal electrode of a device. The "N" material in a junction diode.

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Single unit used to convert chemical energy into a DC electrical voltage.

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Frequency to which an amplifier is tuned. The frequency half way between the cut-off frequencies of a tuned circuit.

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Midway connection between the two ends of a winding.

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Circuit that make use of a center tapped transformer and two diodes to provide full wave rectification.

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A transformer with a connection at the electrical center of a winding.

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Capacitor in which the dialectric is ceramic.

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Quantity of electrical energy.

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Current that flows to charge a capacitor or battery when voltage is applied.

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Connection to a chassis.

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Metal box or frame into which components are mounted.

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A type of active filter characterized by high roll-off rates (40 dB per decade per pole) and midband gain that is not constant.

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Inductor used to oppose the flow of alternating current.

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1) Interconnection of components to provide an electrical path between two or more components.
2) Any closed path followed by electrical current.
3) A configuration of electrically or electromagnetically connected components or devices.

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Source:www.the12volt.com/glossary/glossary.asp
Source:http://www.twysted-pair.com/dictionary.htm

A device that protects electric circuits by interrupting power in a circuit when an overload occurs. Unlike a fuse a circuit breaker is resetable. Rated in amperes (amps).

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A protective device used to open a circuit when current exceeds a maximum value. In effect a reusable fuse.

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A diode circuit used to change the DC level of a waveform without distorting the waveform.

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A variation of the Colpitts oscillator. An added capacitor is used to eliminate the effects of stray capacitance on the operation of the basic Colpitts oscillator.

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A linear amplifier biased so the active device conducts through 360 degrees of the input waveform.

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An amplifier with two active devices. The active components are biased so that each conducts for approximately 180 degrees of the input waveform cycle.

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An amplifier in which the active device conducts for less than 180 degrees of the input waveform cycle.

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A diode circuit used to eliminate part of a waveform

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Distortion caused by overdriving an amplifier.

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Audible distortion that occurs when continuous power-to-peak power capabilities (headroom) are exceeded. "Turn it down!"

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A square waveform used for synchronizing and timing of several circuits.

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Circuit having a complete path for current flow.

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Gain of an amplifier when a feedback path is present.

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A speaker composed of larger cone for low range frequencies and a smaller cone or tweeter for higher frequencies aligned on the same axis. A crossover network is necessary to route the proper signals to each driver. These may be passive (usually included). If the speakers are bi-amplified, an active crossover will be used to route the proper range of frequencies to the respective amplifier channels.

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Transmission line in which the signal carrying conductor is covered by a dialectric and another conductor.

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The degree of coupling between two circuits.

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Magnetizing force needed to reduce residual magnetism in a material to zero.

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A crossover component used to filter out higher frequencies and allow lower frequencies to pass.

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Source:www.the12volt.com/glossary/glossary.asp

The semiconductor region in a bipolar junction transistor through which a flow of charge carriers leaves the base region.

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A graph of collector voltage over collector current for a given base current.

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Set of colors used to indicate value of a component.

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An oscillator with a pair of tapped capacitors in the feedback network.

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A BJT circuit in which the base connection is common to both input and output.

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A multisegment light emitting diode (LED) with a single negative voltage input connection. Separate anode connections are provided for each individual segment.

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A BJT circuit in which the collector connection is common to both input and output.

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A FET circuit in which the drain connection is common to both input and output.

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A BJT circuit in which the emitter connection is common to both input and output.

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A FET circuit in which the gate connection is common to both input and output.

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A FET circuit in which the source connection is common to both input and output.

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A multisegment light emitting diode (LED) with a single positive voltage input connection. Separate cathode connections are provided for each individual segment.

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The ratio of op-amp differential gain to common-mode gain. A measure of an op-amp's ability to reject common-mode signals such as noise.

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Signals that appear simultaneously at two inputs of an operational amplifier (op-amp). Common mode signals are always equal in amplitude and phase.

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An op-amp circuit that compares two inputs and provides a DC output indicating the polarity relationship between the inputs.

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A class B amplifier using matched complementry transistors. Does not require a phase inverter for push-pull output.

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Two transistors, one NPN and one PNP having near identical charastics. N-channel and P-channel FETs can also be complementry.

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Numbers composed of a real number part and an imaginary number part.

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The maximum possible peak-to-peak output of an amplifier.

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The mode of heat transfer within a body or between bodies in contact with each other.

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The ability of a conductor to allow the passage of electrons, measured in the current per unit of voltage applied, shown in resistance.

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The most common shape for the radiating surface of a loudspeaker referred to as the part that moves the air.

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A lead, wire, or connection point that shows positive 12 volts regardless of ignition key position or any other switch; Positive terminal of 12 volt battery.

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Circuit used to maintain constant current to a load having resistance that changes.

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Current carrying part of a switch, relay or connector.

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Occurs when a complete path for current exists.

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Concept of current produced by the movement of positive charges towards the negative terminal of a source.

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Power lost in transformers, generators, connecting wires and other parts of a circuit due to current flow through the resistance of copper conductors.

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Magnetic material within a coil used to concentrate the magnetic field.

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Unit of electric charge. A negative coulomb charge consists of 6.24 × 1018 electrons.

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Voltage induced into an inductor due to an alternating or pulsating current. Counter emf is always in polarity opposite to that of the applied voltage. Opposing a change of current.

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To electronically connect two circuits so that signal will pass from one to the other.

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The way some atoms complete their valence shells by sharing valence electrons with neighbouring atoms.

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A combination of codes and interleaved data that mae it possible to detect and correct errors in a compact disc system.

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Distortion caused by both devices in a class B amplifier being cut-off at the same time.

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The frequencies at which an active or passive crossover network divides audio signals, expressed in Hertz (Hz).

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A unit that divides the audio spectrum into two or more frequency bands. The two types are active and passive.

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Same as crossover frequency.

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The amount of interference on one stereo channel caused by the leaking of the other stereo channel. The higher the rating in decibels (dB), the better the Channel Separation.

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Circuit used to protect the output of a souce from a short circuited load. Load current is limited to a value the source can deliver without damage.

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Cathode Ray Tube.

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Natural or synthetic piezoelectric or semiconductor material with atoms arranged with some degree of geometric regularity. Usualy used as presision oscilator

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Oscillator that uses a quartz crystal in its feedback path to maintain a stable output frequency.

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The rate of flow of electricity, measured in amperes (amps).

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Amplifier to increase signal current.

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Parallel network designed to divide the total current of a circuit

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Feedback configuration where a portion of the output current is fed back to the amplifier input.

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Term used to describe the fact that DC current through the base circuit of a class B amplifier is approximately equal to the DC collector current.

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Resistor in the path of current flow to control the amount of current drawn by a device.

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Condition when an active device is biased such that output current is near zero or beyond zero.

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Frequency at which the power gain of an amplifier falls below 50% of maximum.

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When a repeating wave rises from zero to a positive maximum then back to zero and on to a negative maximum and back to zero it is said to have completed one cycle.

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Created: __/__/03
Updated: __/__/__
Checked: __/__/__