Electronics (Mike Jaroch)
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A logic function of A and B that is true if either A or B is false .
A combination of a NOT function and an AND function in a binary circuit that has two or more inputs and one output. The output is logic 0 only if ALL inputs are logic 1; it is logic 1 if ANY input is logic 0 .
See RESONANT FREQUENCY .
The line-of-sight horizon .
The length of a minute of arc of a great circle of the earth (6,076 ft) .
NAUTICAL RADAR MILE
See RADAR MILE .
NEAR SYNCHRONOUS ORBIT
An orbit in which the satellite rotates close to but not exactly at the same speed as the earth .
The process of inverting the value of a function or variable .
That part of a sine wave that is below the reference level   .
A circuit that clamps the upper extremity of the output waveshape to a dc
potential of 0 volts .
A terminal or electrode having more electrons than normal. Electrons flow
out of the negative terminal of a voltage source .
Feedback in which the feedback signal is out of phase with the input signal.
Also called DEGENERATIVE FEEDBACK .
The form of logic in which the more positive voltage level represents a logic 0,
FALSE, or LOW and the more negative voltage represents a logic 1, TRUE, or HIGH .
NEGATIVE TEMPERATURE COEFFICIENT
A characteristic of a semiconductor material, such as silver sulfide, in which resistance to electrical current flow decreases as temperature increases  
A combination of electrical components. In a parallel circuit it is composed of two or more branches .
(1) In a normal condition, hence neither positive nor negative. A neutral object has a normal number of electrons (the same number as protons) . (2) The teletypewriter operation where current flow represents a mark and no flow represents a space .
The process of counteracting or "neutralizing" the effects of interelectrode
NEWTON'S SECOND LAW OF MOTION
If an unbalanced outside force acts on a body, the resulting acceleration is directly proportional to the magnitude of the force, is in the direction of the force, and is inversely proportional to the mass of the body .
The condition that exists when an electrical source or secondary of a
transformer is operated without an electrical load .
The fixed minimum points of voltage or current on a standing wave or antenna .
(1) In reference to sound, an unwanted disturbance caused by spurious waves that originate from man-made or natural sources . (2) In radar, erratic or random deflection or intensity of the indicator sweep that tends to mask small echo signals .
The ratio of output noise to input noise in a receiver .
Circuit that clips the peaks of the noise spikes in a receiver .
See NOISE LIMITER .
See NOISE LIMITER .
NONDEGENERATIVE PARAMETRIC AMPLIFIER
A parametric amplifier that uses a pump signal frequency that is higher than twice the frequency of the input signal .
See OMNIDIRECTIONAL .
A device in which the output does not rise and fall in direct proportion to the
input   .
An impedance in which the resulting current through the device is not
proportional to the applied voltage .
Objects that either reflect or diffuse light that falls upon them .
A transmission fine that has no standing waves of current or voltage .
NONTRIP-FREE CIRCUIT BREAKER
A circuit breaker that can be held in the ON position during an overcurrent condition .
A logic function of A and B that is true if both A and B are false .
An OR gate that is followed by an inverter to form a binary circuit in which the output is a logic 0 if ANY of the inputs is a logic 1 and the output is a logic 1 only if ALL the inputs are a logic 0 .
The imaginary line perpendicular to the point at which the incident wave strikes the reflecting surface. Also called the perpendicular .
A binary circuit with a single output that is always the opposite of the input. Also called an INVERTER CIRCUIT .
An NPN transistor is formed by introducing a thin region of P-type material between two regions of N-type material .
On a polar-coordinate graph, the area that represents minimum or 0 radiation .
(1) A mathematical entity that may indicate quantity or amount of units. (2) Loosely, a numeral. An abstract mathematical symbol for expressing a quantity. In this sense, the manner of representing the number is immaterial. Take 26, for example; this is its decimal form - but it could be expressed as a binary (base 2), octal (base 8), or hexadecimal (base 16) number .
The representation of numbers by agreed sets of symbols according to
agreed rules .
Loosely, a number representation system. Any system for the representation of
numbers (see POSITIONAL NOTATION) .
(1) A discrete representation of a number. For example, twelve, 12, XII, 11002 are four different numerals that represent the same number. (2) A numeric word that represents a number .
Moving an antenna feed point in a conical pattern so that the polarization of the beam does not change .