Today's Transistors
The point-contact
transistor was however rather big, compared with today's
transistors, and difficult to produce in large scale. The
most used transistor of today is therefore of a diffent kind.
It is called a field-effect transistor or FET for short.
There are several kinds of FETs today and the one we are
going to look at is called metal-oxide semiconductor
field-effect transistor (MOSFET). The basis for the function
of the different FETs is however the same.