Page 1106 - The Mechatronics Handbook

V DD
V DD

_
G=A
G
A
INPUT OUTPUT

V SS

FIGURE 40.27 A CMOS inverter [3].

Vcc

INPUT, A

OUTPUT, (A+B)'

INPUT, B

FIGURE 40.28 A CMOS NOR gate.

With decreasing transistor sizes due to advancements in fabrication technologies, the speed of CMOS
devices continue to increase.

40.6 Logic Gate Integrated Circuits

A commercial logic gate ICs has several gates of the same type on it. For example, Fig. 40.29 shows a
commercial quad-AND gate IC. The chip itself is powered with V cc and GND pins, A and B pins are inputs,
and the Y pins are the corresponding outputs. You can use one or all of the gates on a chip as needed.

©2002 CRC Press LLC