A bipolar transistor that is composed entirely of one type of semiconductor, silicon. Abbreviated BJT. Also known as silicon homojunction.
Related Terms |
TRANSISTOR
An active semiconductor device capable of providing power amplification and having three or more terminals.
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AVALANCHE TRANSISTOR
A transistor that utilizes avalanche breakdown to produce chain generation of charge-carrying hole-electron pairs.
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BETA
The current gain of a transistor that is connected as a grounded-emitter amplifier, expressed as the ratio of change in collector current to resulting change in base current, the collector voltage being constant.
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BIAS CURRENT
1. An alternating electric current above about 40,000 hertz added to the audio current being recorded on magnetic tape to reduce distortion. 2. An electric current flowing through the base-emitter junction of a transistor and adjusted to set the operating point of the transistor.
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BETA-CUTOFF FREQUENCY
The frequency at which the current amplification of an amplifier transistor drops to 3 decibels below its value at 1 kilohertz.
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BUMP CONTACT
A large-area contact used for alloying directly to the substrate of a transistor for mounting or interconnecting purposes.
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CHOPPER TRANSISTOR
A bipolar or field effect transistor operated as a repetitive 'on/off' switch to produce square-wave modulation of an input signal.
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CHANNEL FET MICROPHONE
A microphone in which a membrane is used as the gate to a field-effect transistor (FET) located just below it, and motion of the membrane modulates the current between the source and drain of the transistor.
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CHEMICALLY SENSITIVE FIELD-EFFECT TRANSISTOR
A field-effect transistor in which the ordinary gate electrode is replaced by a chemically sensitive membrane so that the gain of the transistor depends on the concentration of chemical substances.
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COMMON-BASE FEEDBACK OSCILLATOR
A bipolar transistor amplifier with a common-base connection and a positive feedback network between the collector (output) and the emitter (input).
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