## Electronics (Mike Jaroch)

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### N

#### NODE

The fixed minimum points of voltage or current on a standing wave or antenna [10].
 Keyword(s): NODE

#### 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].

 Keyword(s): NOISE

#### NOISE FIGURE

The ratio of output noise to input noise in a receiver [18].
 Keyword(s): NOISE FIGURE

#### NOISE LIMITER

Circuit that clips the peaks of the noise spikes in a receiver [17].
 Keyword(s): NOISE LIMITER

#### NOISE SILENCER

See NOISE LIMITER [17].
 Keyword(s): NOISE SILENCER

#### NOISE SUPPRESSOR

See NOISE LIMITER [17].
 Keyword(s): NOISE SUPPRESSOR

#### NONDEGENERATIVE PARAMETRIC AMPLIFIER

A parametric amplifier that uses a pump signal frequency that is higher than twice the frequency of the input signal [11].

 Keyword(s): NONDEGENERATIVE PARAMETRIC AMPLIFIER

#### NONDIRECTIONAL

See OMNIDIRECTIONAL [10].
 Keyword(s): NONDIRECTIONAL

#### NONLINEAR DEVICE

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

 Keyword(s): NONLINEAR DEVICE

#### NONLINEAR IMPEDANCE

An impedance in which the resulting current through the device is not
proportional to the applied voltage [12].

 Keyword(s): NONLINEAR IMPEDANCE

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