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bipolar transistor
(redirected from Bipolar junction transistor)

    Also found in: Acronyms, Encyclopedia, Wikipedia 0.01 sec.
bipolar transistor
A type of transistor made of three layers of semiconductors. Each layer has been treated so that the layer in the middle (called the base) has an inherent electric charge, while the layers around it (the emitter and collector) have an inherent opposite charge. A bipolar transistor with a negative base is designated PNP, and one with a positive base is designated NPN. When subjected to current flow, the base acts like a gate, enhancing or inhibiting the current flow from the emitter to the collector. Bipolar transistors are used primarily to amplify or switch current signals, and are common in audio equipment. Compare field effect transistor.
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Among the revised chapters are those on linear and bilinear operators and matrices, passive circuit elements, bipolar junction transistor amplifiers, and symbolic analysis.
Fundamentals of circuits and filters by SciTech Book News
Karris covers basic electronic concepts and signals, semiconductor electronics, diodes, bipolar junction transistors, field effect transistors and PNPN devices, operational amplifiers, integrated circuits, pulse circuits and waveforms generators, frequency characteristics of single-stage and cascaded amplifiers, tuned amplifiers, sinusoidal oscillators, compensated attenuators, and more.
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In radar systems, bipolar junction transistors and vertical MOSFETs have been the device of choice for decades.
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