18WuD2x

482 nonoscillating detector • nonsynchronous vibrator
generate a signal on its own. Compare OSCIL-
LATING DETECTOR.
nonplanar 1. Existing in three spatial dimensions.
2. Pertaining to a circuit that cannot be fabricated
on a two-dimensional board without the
use of jumper wires.
nonpolar 1. Having no pole(s). 2. Pertaining to
atoms that share electrons to complete their
outer shells. 3. Not polarized nor requiring polarization.
Example: a 100-pF disk ceramic capacitor
is nonpolar because it can be used in circuits
without consideration of voltage polarity.
nonpolar crystal A crystal in which lattice points
are identical.
nonpolarized electrolytic capacitor An electrolytic
capacitor that has no definite negative
and positive terminals and, consequently, can be
used in alternating-current circuits, as well as in
direct-current circuits. See also NONPOLAR, 3.
Oxide
film
Anodes
Electrolyte
paste
Oxide
film
nonpolarized electrolytic capacitor
nonpolarized reactor A saturable reactor in which
the lines of flux produced in the three-leg core by
the coils on the two outer legs oppose each other
in the center leg. When direct current (dc) is
passed through the coil on the center leg to saturate
the core, operation remains the same for either
dc polarity. Compare POLARIZED REACTOR.
nonpolarized relay See UNPOLARIZED RELAY.
nonprint code In telegraphy, a code used to start
teleprinter functions excluding printing.
nonreactive circuit A circuit containing pure resistance
only.
nonrechargeable battery See NONCHARGEABLE
BATTERY.
nonrecurrent Pertaining to phenomena that do
not repeat periodically. Thus, a single sweep in an
oscilloscope is nonrecurrent.
nonrecurrent sweep See NONREPETITIVE SWEEP.
nonregenerative detector A detector having no
regenerative feedback. Such a detector is stable,
but relatively insensitive. Compare REGENERA-
TIVE DETECTOR.
nonregenerative receiver A radio receiver in
which no local signal whatever is generated.
nonrepetitive phenomena See NONRECURRENT.
nonrepetitive sweep In an oscilloscope, a single
horizontal sweep of the electron beam, initiated
either by the operator or by the signal under observation.
Also called SINGLE SWEEP. Compare
RECURRENT SWEEP.
nonreset timer A timer that must be reset manually.
nonresident routine A computer routine not permanently
stored in memory. Compare RESIDENT
ROUTINE.
nonresonant 1. Pertaining to a resonant circuit or
device operated at some frequency other than one
of its resonant frequencies. Thus, reactance is
present at the operating frequency. See RESO-
NANCE. 2. Pertaining to a circuit or device that
exhibits pure resistance (without reactance) over
a wide range of frequencies.
nonresonant lines Transmission lines so dimensioned
and operated that they do not resonate at
the operating frequency.
nonresonant load An alternating-current load
that is either purely resistive or is detuned from
the fundamental and harmonic frequencies of the
source from which it is operated.
nonreturn to zero In the magnetic recording of
digital data, the system in which the current flowing
in the write-head coil is sustained (i.e., does
not return to zero) after the write pulse.
nonsalient pole A nonprojecting (often flush) pole.
Compare SALIENT POLE.
nonsaturated color 1. Visible light that consists of
energy at more than one wavelength. 2. A color that
contains some white, in addition to the pure color.
nonsaturated logic A logic circuit in which transistors
are prevented from saturating. This results
in higher operating speed than SATURATED
LOGIC using the same transistors.
nonshorting switch A multiple-throw switch that
disconnects one circuit before completing another;
that is, no two poles are ever connected simultaneously.
nonsinusoidal waveform A waveform whose curve
cannot be represented by the equation y = c sin
a(x + b), where a, b, and c are constants, y is the
dependent variable (usually instantaneous amplitude
or frequency), and x is the independent
variable (usually time), for any real-number values
of a, b, and c. Examples: BACK-TO-BACK
SAWTOOTH, SAWTOOTH, and SQUARE WAVE.
The COSINE WAVE is sinusoidal, being a SINE
WAVE shifted in phase by 90 degrees.
nonsymmetrical wave See ASYMMETRIC WAVE.
nonsynchronous Unrelated in cyclic quality to
other such qualities in the system.
nonsynchronous network A communications network
in which the clocks are not all synchronized.
nonsynchronous vibrator A power-supply vibrator
that is essentially a single-pole, double-throw
switch providing no mechanical rectification.
A separate rectifier must be used. Compare