"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 "T" Terms
THERMISTOR. A semiconductor device whose resistance varies with temperature. A type of
bolometer characterized by a decrease in resistance as the dissipated power increases. [Thermistor Manufacturers]
THERMOCOUPLE. A junction of two dissimilar metals that produces a voltage when heated. [Thermocouple Wire Manufacturers]
THERMOCOUPLE METER MOVEMENT. A meter movement that uses the current induced in a
thermocouple by the heating of a resistive element to measure the current in a circuit; used to measure
ac or dc.
THERMOPLASTIC. A synthetic mixture of rosins that is flexible and used as an insulting material.
Generally used as an insulator for low- and medium-range voltages. [ABS Plastic]
THETA.The Greek letter used to represent phase angle.
THICK FILM COMPONENTS. Passive circuit components (resistors and capacitors) having a thickness
of 0.001 centimeter.
THIN FILM COMPONENTS. Passive circuit elements (resistors and capacitors) deposited on a substrate
to a thickness of 0.0001 centimeter.
THREE-ELEMENT ARRAY. An array with two parasitic elements (reflector and director) and a driven
element.
THREE-DIMENSIONAL RADAR (3D). A radar set that measures the range, bearing and altitudes of a
target.
THROW. In a switch, the number of different circuits each pole can control; for example, single throw and
double throw.
THYRATRON. A gas tube used as a modulator switching device.
THYRATRON TUBE. A gas-filled triode in which a sufficiently large positive pulse applied to the
control grid ionizes the gas and causes the tube to conduct, after which the control grid has no effect in
conduction.
TICKLER COIL. A small coil connected in series with the collector or plate circuit of a transistor or tube
and inductively coupled to the base or grid-circuit coil to establish feedback (regeneration).
TIME CONSTANT. Time required for an exponential quantity to change by an amount equal to 63.2 percent of the total change that can occur.
TIME-DIVISION MULTIPLEXING. The process that periodically samples the full 360 degrees of each
sine wave. The sample can be of a received signal or of a signal to be transmitted.
TIME LAG. The delay in a servosystem between the application of the input signal and the actual
movement of the load.
TIMER. See SYNCHRONIZER. [IC Clocks and Timers]
TIN WHISKER. Tin whiskers are electrically conductive, crystalline structures of tin that sometimes grow from surfaces where tin (especially electroplated tin) is used as a final finish."NASA". [Tin Whisker Growth]
TINNING. The process of applying a thin coat of solder to materials prior to their being soldered; for
example, application of a light coat of solder to the filaments of a conductor to hold the filaments in
place prior to soldering of the conductor.
TOLERANCE. The maximum permissible error or variation from the standard in a measuring
instrument. A maximum electrical or mechanical variation of specifications that can be tolerated
without impairing the operation of a device. Resistor Tolerance
TOP-HAT. An antenna that is center-fed and capacitively loaded.
Next page of "T" Terms and definitions
