Field Effect Transistors
Part 2: MOSFET Transistors
gate is insulated by a layer of silicon Oxide from the Semiconductor
of the n-channel or p-channel. This prevents gate current from flowing,
reducing power usage.
For a great
animated demonstration of how a MOSFET transistor is manufactured
and operates go to Molecular
Expressions: Electricity and Magnetism Tutorials.
the gate is insulated from the channel, N-channel MOSFETs can operate
with a positive gate voltage, which increases current flow. This
is called enhancement mode.