Multiple-Input Over-Voltage, Under-Voltage Window Comparator for Computer Power Supplies
Original Publication Date: 1987-Mar-01
Included in the Prior Art Database: 2005-Feb-01
A technique is described whereby a multiple-input window comparator circuit provides the computer power supply circuitry with the ability to simultaneously sense various supply voltage levels for an over- voltage or under-voltage condition. This circuitry compares the various voltage levels with specified limits, so as to provide protection for computer circuitry, should a power supply voltage vary over or under specified limits. The circuit is unique in that it can be used with any set of output voltage levels, eliminating the need to customize comparator circuitry for each voltage in question. This is accomplished through a unique multiple-input front end on each of the two comparators.