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Tachometer:
A transducer used for measuring the rate of revolution of a
shaft.
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TAD:
Total Accumulated Discharge (mA-hr).
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TCP/IP:
Transmission Control Protocol/Internet Protocol: The
protocols or conventions that computers use to communicate
over the Internet.
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TCXO:
Temperature Compensated Crystal Oscillator. A crystal
oscillator that includes circuitry that compensates for
temperature variations, to maintain a more constant
frequency.
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TDR:
Time-Delay Relay.
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TEC:
A thermoelectric cooler is a small cooling device that
relies on a Peltier junction. Composed of two conductors
made of different materials, a Peltier junction (discovered
in 1833 by J. C. Peltier) acts as a heat pump which can cool
or warm when current is passed through it.
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Temperature Comparator:
An integrated circuit with a digital output that indicates
whether a measured temperature is above or below a
predetermined threshold.
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Temperature Sensor:
Temperature sensor that uses an external diode-connected
transistor as the sensing element to measure temperatures
external to the sensor (for example, on a circuit board or
on the die of a
CPU). Generally produces a digital output.
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Temperature Switch:
A circuit that opens and closes a conductive path based on
temperature.
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TFT:
Thin-Film
Transistor.
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THB:
Temperature/Humidity Bias.
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Thermostat:
Circuit that indicates whether a measured temperature is
above or below a particular temperature threshold or trip
point. Used for thermal protection and simple temperature
control systems.
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TIA:
Transimpedance Amplifier.
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Totem Pole:
A standard
CMOS output structure where a P-channel
MOSFET is
connected in series with an N-Channel MOSFET and the
connection point between the two is the output. The P-FET
sits on top of the N-FET like a "totem pole." Both gates are
driven by the same signal. When the signal is low, the P-FET
is on; when the signal is high, the N-FET is on. This
creates a push-pull output using just two
transistors.
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TQFP:
Thin Quad Flat Pack.
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Transceivers:
A device that contains both a transmitter and receiver.
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Transconductance Amplifier:
An amplifier that converts a voltage to a current. Also
known by several other terms (see synonym list). One synonym
is OTA, or operational transconductance amplifier, a term
that marries the terms transconductance amplifier and
operational amplifier.
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Transconductance:
The gain of a transconductance amplifier (an amp in which
the a change in input voltage causes a linear change in
output current). The basic gain of vacuum tubes and
FETs is
expressed as transconductance. It is represented with the
symbol gm.
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Transistor:
A basic solid-state control device which allows or disallows
current flow between two terminals, based on the voltage or
current delivered to a third terminal.
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TSOC:
Thin Small-Outline C-lead.
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TSOP:
Thin Small-Outline package.
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TSSM:
Temperature Sensor and System Monitor.
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TSSOP:
Thin shrink small-outline package
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TTL:
("Transistor Transistor Logic") The first logic family
introduced in 1968. It's made of
bipolar transistors.
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TVS:
Transient Voltage Suppressor.
Semiconductor device designed
to protect a circuit from voltage and current transients.
Typically implemented as a large silicon diode operating in
avalanche mode to absorb large currents quickly.
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Tx:
Transmit.
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