## Electronics (Mike Jaroch)

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## N |
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## NANDA logic function of A and B that is true if either A or B is false [13]. | ||

## NATURAL FREQUENCYSee RESONANT FREQUENCY [9]. | ||

## NATURAL HORIZONThe line-of-sight horizon [10]. | ||

## NAUTICAL MILEThe length of a minute of arc of a great circle of the earth (6,076 ft) [18]. | ||

## NAUTICAL RADAR MILESee RADAR MILE [18]. | ||

## NEAR SYNCHRONOUS ORBITAn orbit in which the satellite rotates close to but not exactly at the same speed as the earth [17]. | ||

## NEGATIONThe process of inverting the value of a function or variable [13]. | ||

## NEGATIVE ALTERNATIONThat part of a sine wave that is below the reference level [2] [10] [12]. | ||

## NEGATIVE CLAMPERA circuit that clamps the upper extremity of the output waveshape to a dc potential of 0 volts [9]. | ||

## NEGATIVE ELECTRODEA terminal or electrode having more electrons than normal. Electrons flow out of the negative terminal of a voltage source [1]. | ||

## NEGATIVE FEEDBACKFeedback in which the feedback signal is out of phase with the input signal. Also called DEGENERATIVE FEEDBACK [8]. | ||

## NEGATIVE LOGICThe 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 [13]. | ||

## NEGATIVE TEMPERATURE COEFFICIENTA characteristic of a semiconductor material, such as silver sulfide, in which resistance to electrical current flow decreases as temperature increases [1] [4] [7]. | ||

## NEGATIVE-RESISTANCE ELEMENTA component having an operating region in which an increase in the applied voltage increases the resistance and produces a proportional decrease in current. Examples include tunnel diodes and silicon unijunction transistors [11]. | ||

## NETWORKA combination of electrical components. In a parallel circuit it is composed of two or more branches [1]. | ||

## NEUTRAL(1) In a normal condition, hence neither positive nor negative. A neutral object has a normal number of electrons (the same number as protons) [1]. (2) The teletypewriter operation where current flow represents a mark and no flow represents a space [17]. | ||

## NEUTRALIZATIONThe process of counteracting or "neutralizing" the effects of interelectrode capacitance [8]. | ||

## NEWTON'S SECOND LAW OF MOTIONIf 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 [15]. | ||

## NO-LOAD CONDITIONThe condition that exists when an electrical source or secondary of a transformer is operated without an electrical load [2]. | ||

## NODEThe fixed minimum points of voltage or current on a standing wave or antenna [10]. | ||

## NOISE(1) In reference to sound, an unwanted disturbance caused by spurious waves that originate from man-made or natural sources [10]. (2) In radar, erratic or random deflection or intensity of the indicator sweep that tends to mask small echo signals [18]. | ||

## NOISE FIGUREThe ratio of output noise to input noise in a receiver [18]. | ||

## NOISE LIMITERCircuit that clips the peaks of the noise spikes in a receiver [17]. | ||

## NOISE SILENCERSee NOISE LIMITER [17]. | ||

## NOISE SUPPRESSORSee NOISE LIMITER [17]. | ||

## NONDEGENERATIVE PARAMETRIC AMPLIFIERA parametric amplifier that uses a pump signal frequency that is higher than twice the frequency of the input signal [11]. | ||

## NONDIRECTIONALSee OMNIDIRECTIONAL [10]. | ||

## NONLINEAR DEVICEA device in which the output does not rise and fall in direct proportion to the input [6] [7] [12]. | ||

## NONLINEAR IMPEDANCEAn impedance in which the resulting current through the device is not proportional to the applied voltage [12]. | ||

## NONLUMINOUS BODIESObjects that either reflect or diffuse light that falls upon them [10]. | ||

## NONRESONANT LINEA transmission fine that has no standing waves of current or voltage [10]. | ||

## NONTRIP-FREE CIRCUIT BREAKERA circuit breaker that can be held in the ON position during an overcurrent condition [3]. | ||

## NORA logic function of A and B that is true if both A and B are false [13]. | ||

## NOR GATEAn 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 [13]. | ||

## NORMALThe imaginary line perpendicular to the point at which the incident wave strikes the reflecting surface. Also called the perpendicular [10]. | ||

## NOT CIRCUITA binary circuit with a single output that is always the opposite of the input. Also called an INVERTER CIRCUIT [13]. | ||

## NPNAn NPN transistor is formed by introducing a thin region of P-type material between two regions of N-type material [7]. | ||

## NULLOn a polar-coordinate graph, the area that represents minimum or 0 radiation [10]. | ||

## NUMBER(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 [13]. | ||

## NUMBER REPRESENTATIONThe representation of numbers by agreed sets of symbols according to agreed rules [13]. | ||

## NUMBER SYSTEMLoosely, a number representation system. Any system for the representation of numbers (see POSITIONAL NOTATION) [13]. | ||

## NUMERAL(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 [13]. | ||

## NUTATINGMoving an antenna feed point in a conical pattern so that the polarization of the beam does not change [18]. | ||