How Electronics Transistor Components Work
There are 3 main types of transistors used in Electronics.
- Bipolar Junction Transistor (BJT)
- Junction Field Effect Transistor (JFET)
- Metal Oxide Semiconductor Field Effect Transistor (MOSFET)
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Transistors are 3 terminal components. One of the terminals (Base for BJT and Gate for FETs) controls the conduction between the other 2 terminals.
- BJT terminals (pins): Collector, Base and Emitter.
- JFET and MOSFET terminals (pins): Drain, Gate and Source.
BJT and basic FET Transistor Schematic Symbols
For the Bipolar Junction Transistor (BJT), the Base terminal controls how well the Collector to Emitter conducts. Whereas the Field Effect Transistor (FET) has the Gate terminal to control how well the Drain to Source terminals conduct.
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