C
MOS is much more than a little chip in your
PC. It is a
digital logic family considered to be a big
improvement over previous logic families such as
TTL,
RTL, and
ECL.
C
MOS works over a very wide power-supply range, uses no power when inputs are
stable (not changing), and very little otherwise.
Since CMOS is relatively tolerant of system
noise (and is itself almost
noiseless), is
inexpensive and is available from
dozens of manufacturers, it is a good choice for
digital logic design both in
industry and for the
hobbyist.