"A"
"B"
"C",
"D",
"E",
"F",
"G",
"H",
"I",
"J",
"K",
"L",
"M",
"N",
"O",
"P",
"Q",
"R",
"S",
"T",
"U",
"V",
"W",
"X",
"Y",
"Z"
Previous set of "S" terms.
SERIES PEAKING. A technique used to improve high-frequency response in which a peaking coil is
placed in series with the output signal path.
SERIES-POSITIVE LIMITER. A diode connected in series with the output, in which the output is taken
across a resistor. It eliminates the positive alternation of the input wave.
SERIES-RESONANT CIRCUIT. A resonant circuit in which the source voltage is connected in series
with a capacitor and an inductor (also in series) to furnish a low impedance at the frequency at which
the circuit is resonant.
SERIES VOLTAGE REGULATOR. A regulator with a regulating device that is in series with the load
resistance. Voltage Regulator Manufacturers
SERIES-WOUND MOTORS AND GENERATORS. Machines in which the armature and field
windings are connected in series with each other.
SERVOAMPLIFIER. Either ac or dc amplifiers used in servosystems to build up signal strength. These
amplifiers usually have relatively flat gain versus frequency response, minimum phase shift, low output
impedance, and low noise level.
SERVOMOTOR. An ac or dc motor used in servo-systems to move a load to a desired position or at a
desired speed. The ac motor is usually used to drive light loads at a constant speed, while the dc motor
is used to drive heavy loads at varying speeds. Motor Manufacturers
SERVOSYSTEM. An automatic feedback control system that compares a required condition (desired
value, position, and so forth) with an actual condition and uses the difference to drive a control device
to achieve the required condition.
SHADOW. A dead spot (minimum radiation) caused by the physical obstruction of transmitted waves by a
feed horn.
SHAPING CIRCUIT. A circuit that alters the shapes of input waveforms.
SHARP-CUTOFF TUBE. The opposite of a remote-cutoff tube. An electron tube that has evenly spaced
grid wires. The amplification of the sharp-cutoff tube is limited by the bias voltage and tube
characteristics.
SHELF LIFE. The period of time that a cell or battery may be stored and still be useful. Applies to ICs, capacitors and other electronic devices.
SHIELDED PAIR. A line consisting of parallel conductors separated from each other and surrounded by a
solid dielectric.
SHIELDING. A metallic covering used to prevent magnetic or electromagnetic fields from affecting
an object. Technique designed to minimize internal and external interference.
SHORT CIRCUIT. An unintentional current path between two components in a circuit or between a
component and ground; usually caused by a circuit malfunction.
SHORT-CIRCUITED LINE. A transmission line that has a terminating impedance equal to 0.
Next page of "S" Terms and definitions
