Patent ID: 6570367
Filing Date: 2003-05-27
Classification: G05F

Abstract:
A voltage generator, comprising:an output connection for providing an output voltage; an input connection for receiving a first reference potential; a first voltage regulator having an output stage and a comparator stage for driving said output stage, said output stage having an output connected to said output connection, said comparator stage having an input connected to said input connection for receiving the first reference potential and having another input connected to said output stage; a second voltage regulator having an output stage, a comparator stage for driving said output stage, and a first switch, said output stage having an output connected to said output connection, said comparator stage of said second voltage regulator having an input connected to said input connection for receiving the first reference potential and having another input connected to said output stage, said first switch for switching said second voltage regulator on and off; a connection for receiving a second reference potential that is different than the first reference potential; and an additional comparator stage having a first input connected to said connection for receiving the second reference potential, said additional comparator stage having a second input connected to said output connection, said additional comparator stage having an output providing an output signal for controlling said first switch of said second voltage regulator.