what is jfet?

Question

a bout fundemental of semicoductor devices

Answer 1

JFET stands for 'junction field-effect transistor'. Its a three-lead semiconductive device that can be used as an electrically controlled switch, amplifier control or votage-controlled resistor. They are only controlled by voltage and don't need a biasing current to operate. They can be used in stuff like amps or audio mixers. They basically combine signals from stuff like mics or pre-amps or whatever and provide a singular output. Hope this helps...

Answer 2

JFET = junction field-effect transistor. The transistor design is to restrict/control the current in the channel by expanding or contracting the depletion region, hence the channel cross-section, with a gate signal. The gate is the junction in JFET, compared with using oxide in an MOSFET.

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