COMPARATOR, A-D CONVERTER AND SCHMITT TRIGGER CIRCUIT

摘要

PROBLEM TO BE SOLVED: To provide a comparator and an A-D converter which have high speed, can be configured in a small circuit area, and operate with less power consumption. SOLUTION: A CMOS converter is provided which consists of p-channel and n-channel gain coefficient variable MOS transistors capable of controlling a gain coefficient by a gain coefficient control voltage. With this configuration, the comparison voltage of the comparator can be controlled. Also, the circuit area of an AD converter in which the comparator is used can be reduced, and the power consumption of various kinds of circuits of these devices can also be reduced. COPYRIGHT: (C)2005,JPO&NCIPI