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A circuit which is stable for certain values of input signal and gain, and unstable for other values.

Related Terms

ALIVE

A term referring to a circuit in which a current is flowing. Also referred to as live.

HARMONIC

1. A sinusoidal quantity having a frequency that is an integral multiple of the frequency of a periodic quantity to which it is related. 2. A signal having a frequency which is an integral multiple of the fundamental frequency.

HOP

Travel of a radio wave to the ionosphere and back to earth. The number of hops a radio signal has experienced is usually designated by the expression one-hop, two-hop, multihop, etc

HOMING

Navigation toward a point by following a signal from that point. Radiobeacons are commonly used for homing.

CASCADE

A series of stages in which the output of one stage is the input of the next stage.

DIRECTIONAL CONTROL SERVO VALVE

A directional control valve which modulates flow or pressure as a function of its input signal.

SPRAY-COIL UNIT

A cooling circuit that sprays water over cooling coils through inflowing air to humidify or dehumidify that air, as required.

VOLTAGE DROP

The voltage drop around a circuit including wiring and loads must equal the supply voltage.

DIRECT CURRENT

A source of power for an electrical circuit which does not reverse the polarity of its charge.

ELECTROMECHANICAL

Converting electrical input into mechanical action. A relay is an electromechanical switch.
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