Patent ID: 6127879
Filing Date: 2000-10-03
Classification: H02H

Abstract:
A circuit for supplying power to each of a plurality of loads from one or another of two redundant power supplies, comprising in combination:a first switch for connecting and disconnecting each of said loads to said one of said redundant power supplies in response to a first control signal;a second switch for connecting and disconnecting said each of said loads to said another of said redundant power supplies in response to a second control signal;a control signal source for generating said first control signal to control the opening and closing of said first switch and a control signal source for generating said second control signal to control the opening and closing of said second switch;a plurality of logic gates for connecting respectively said control signal sources to said plurality of switches;an overvoltage detection circuit for generating a first logic state output in the absence of an overvoltage condition and a second logic state output in the presence of an overvoltage condition;means to couple the output of said overvoltage detection circuit to one input of said plurality of logic gates, wherein said first and second control signals control the state of said switches when said overvoltage detection circuit output is in said first state and said switches are held in an open state when the input to said logic gates from said overvoltage protection circuit is in said second state.