18WuD2x

634 single-trip multivibrator • skin depth
single-trip multivibrator See MONOSTABLE
MULTIVIBRATOR.
single-tuned circuit A circuit tuned by varying
only one of its components [e.g., an intermediatefrequency
transformer in which only the secondary
coil (rather than both primary and
secondary) is tuned].
single-turn coil 1. A coil consisting of a single turn
of wire, tubing, or strip. 2. See RING INDUCTOR.
3. See SHADING COIL.
single-turn potentiometer A potentiometer that
can be adjusted through its entire resistance
range by no more than one full rotation of the
shaft. Usually, the turning range is somewhat
less than a full circle (e.g., 300 degrees).
single-wire-fed antenna See WINDOM ANTENNA.
single-wire line 1. See SINGLE-WIRE TRANSMIS-
SION LINE. 2. A single wire used for communication
or control purposes. The earth furnishes the
return path.
single-wire transmission line An antenna transmission
line or feeder consisting of one wire only
(see, for example, WINDOM ANTENNA).
sink 1. A device or circuit into which current
drains. 2. See HEATSINK.
sink circuit The circuit associated with a load or
other sink. Compare SOURCE CIRCUIT, 2.
sinker A piece of semiconductor material used to
reduce the base-collector junction resistance in a
bipolar transistor.
sintering A process in which various solid bodies
are formed from fusible powders at temperatures
below their melting points. Example: sintered
magnetic core.
sinusoidal Having the shape and properties of a
SINE WAVE.
SIO Abbreviation of serial input/output.
SIP Abbreviation of SINGLE-INLINE PACKAGE.
six-phase rectifier A polyphase rectifier circuit
operated from a three-phase supply. The output
ripple frequency is six times the supply frequency.
Primaries
Secondaries
six-phase rectifier
Load
SJD Abbreviation of SILICON JUNCTION DIODE.
skating In a phonograph turntable, the tendency
of the tone arm to swing toward the spindle during
record play, independent of the action produced
by the stylus following the groove.
skeletal code A generalized computer routine
needing only certain parameters to be usable for
a specific application.
skeleton bridge A bridge consisting of an adjustable
arm (potentiometer) and a pair of binding
posts for each of the other three arms. Suitable
resistors, capacitors, or inductors are connected
to the binding posts to set up the bridge circuit
desired.
Det
Gen
skeleton bridge
skeleton-type assembly 1. A method of electronic-equipment
construction in which a minimum
of supporting members is used. An example
is the use of an open framework, instead of a
chassis, to support components. 2. An assembly
of electronic equipment, consisting essentially of
a foundation unit (containing the basic circuitry)
and plug-in units for setting up various complete
equipments.
skew 1. A condition resulting from failure of the
horizontal synchronization in facsimile or television.
The picture appears distorted, and appears
as a non-rectangular parallelogram. 2. In a print
display, nonalignment of columns resulting from
an incorrect number of line spaces in each line.
3. In a probability function, an accumulation of
values toward either side of center.
skewing 1. The bending of a curve away from its
normal shape. 2. In a differential amplifier, the
offset between two signals. Also see OFFSET.
Skiatron A special form of cathode-ray tube, with
the fluorescent coating replaced by a screen of
halide crystals that darken, instead of glow, when
exposed to the electron stream.
skin depth
The depth to which current penetrates
below the surface of a conductor, as a result of
the SKIN EFFECT.