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h-parameters
(hybrid parameters) Transistor specifications that describe the component operating limits under specific circumstances.
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Source:http://www.twysted-pair.com/dictionary.htm
half power point
A frequency at which the power is 50% of maximum. This corresponds to 70.7% of maximum current or voltage.
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Source:http://www.twysted-pair.com/dictionary.htm
half wave rectifier
A diode rectifier that converts AC to pulsating DC by eliminating either the negative or the positive alternation of each input AC cycle.-
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Source:http://www.twysted-pair.com/dictionary.htm
harmonic
Sine wave that is smaller in amplitude and some multiple of a fundamental frequency. Example: 880 Hz. is the second harmonic of 440 Hz., 880 Hz. is the third harmonic of 220 Hz.
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Source:http://www.twysted-pair.com/dictionary.htm
hartley oscillator
An oscillator that uses a tapped inductor in the feedback network.
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Source:http://www.twysted-pair.com/dictionary.htm
henry
The basic unit of inductance.
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Source:http://www.twysted-pair.com/dictionary.htm
Henry / Henries (Hy)
The measurement for inductance. Coils (low pass filters) are measured in millihenries as in 6.4 mHy (6.4 millihenries).
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Source:http://www.the12volt.com/glossary/glossary.asp
Hertz (Hz)
The unit of measurement for frequency. 1 Hz is equal to 1 cycle per second.
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Source:http://www.the12volt.com/glossary/glossary.asp
high fidelity (Hi Fi)
Sound reproduction equipment that reproduces sound as near to the original sound as possible
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Source:http://www.twysted-pair.com/dictionary.htm
High Frequency Driver
A loudspeaker specifically designed to reproduce short, high-frequency wave lengths. The driver typically has a small, lightweight diaphragm. Tweeter.
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Source:http://www.the12volt.com/glossary/glossary.asp
High Pass Filter
A network of elements used to attenuate all frequencies below a predetermined frequency. Frequencies above the cutoff point pass without any effect.
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Source:http://www.the12volt.com/glossary/glossary.asp
high tension
Lethal voltage in the kilovolt range and above.
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Source:http://www.twysted-pair.com/dictionary.htm
high-pass filter
A tuned circuit designed to pass all frequencies above a desnigated cut-off frequency. Frequencies below the cut-off frequency are rejected or attenuated
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Source:http://www.twysted-pair.com/dictionary.htm
Highs
Term which refers to a set of speaker components used to reproduce frequencies above 500 Hz as in a set of separates. May also refer to tweeters which are used to reproduce frequencies usually above 2.5 kHz. Not bass.
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Source:http://www.the12volt.com/glossary/glossary.asp
hole
A gap left in the covalent bond when a valence electron gains sufficient energy to jump to the conduction band.
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Source:http://www.twysted-pair.com/dictionary.htm
hologram
Three-dimensional picture created with a laser.
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Source:http://www.twysted-pair.com/dictionary.htm
holography
The science dealing with three-dimensional optical recording.
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Source:http://www.twysted-pair.com/dictionary.htm
horizontally polarized wave
Electromagnetic wave that has the electric field in the horizontal plane.
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Source:http://www.twysted-pair.com/dictionary.htm
hybrid circuit
Circuit that combines two technologies (passive and active or discrete and integrated components) onto one microelectronic circuit. Passive components are usuall made by thin film techniques, while active components are made with semiconductor techniques.
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Source:http://www.twysted-pair.com/dictionary.htm
hysteresis
Amount that the magnetization of a meterial lags the magnetizing force due to molecular friction. In Schmitt Trigger circuits, the difference between the upper and lower trigger points.
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Source:http://www.twysted-pair.com/dictionary.htm
Created: 07/07/04
Updated: __/__/__
Checked: __/__/__
