Silicon, Circuits, and the Digital Revolution

Introduction to CMOS

CMOS inverting switch

-- Input: HI; Output: LO
-- Input: LO; Output: HI

Fabrication of CMOS inverting switch

CMOS NAND gate

A: B: C:
(in) (in) (out)
HI LO HI
LO HI HI
LO LO HI
HI HI LO

The table above is known as a truth table and represents the output state (result) that is obtained for all possible input states.

Group Activity


SCEN103 Comments, suggestions, or requests to ghw@udel.edu.
"http://www.physics.udel.edu/~watson/scen103/colloq2000/cmos.html"
Last updated May 2, 2000.
© George Watson, Univ. of Delaware, 2000.