FET Fundamentals Unit 5 – Dual Gate MOSFET
UNIT 5 – DUAL GATE MOSFET
UNIT OBJECTIVE
At the completion of this unit, you will be able to describe the operation of a metal oxide
semiconductor field-effect transistor (MOSFET) by using ac and dc measurements.
UNIT FUNDAMENTALS
MOSFETs are either N-channel or P-channel devices.
Similar to a JFET, a single gate MOSFET has 3 terminals: gate, source, and drain.
A MOSFET is also known as an insulated gate FET (IGFET). The gate is physically and
electrically insulated from the device channel by a layer of glass-like material (silicon dioxide)
with excellent insulation properties.
When a MOSFET has two gates, it is known as a dual gate MOSFET.