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What does a transistor do?

Updated: 8/10/2023
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8y ago

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Depending on how the transistor is biased and various other circuits connected to it, a transistor acts as an amplifier and/or switch.

When acting as an amplifier the circuit containing the transistor can do things like transmit or receive radio signals, perform analog mathematical calculations, generate waveforms, etc.

When acting as a switch the circuit containing the transistor can do things like turn on/off a light, turn on/off a motor, perform digital logic or mathematical operations, fetch and decode computer instructions, etc.

Exactly what a transistor can do is really only limited by the system requirements and the designer's imagination as to how to meet those requirements.

There are several different types of transistors: bipolar junction transistors (BJTs), field effect transistors (FETs), unijunction transistors (UJTs), programmable unijunction transistors (PUJTs), spacitors, surface barrier transistors (SBTs), tetrode transistors (TTs), point contact transistors (PCTs), etc.

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8y ago
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13y ago

It is basically an electronic "thing" that has three terminals. Lets say E (emitter), B (base) and C(collector). Lets say we connect C to positive of a battery and E to negative (or ground). As long as we keep some current at B , we'll have current flowing from C to E . Basically its some device that controls current on one side from current on another side. the former being larger in magnitude than the later.

ANSWER: Is a semiconductor voltage amplifier

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13y ago

Based on the application, a transistor can be used as a switch or a signal in a circuit.

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