Patent ID: 6147517
Filing Date: 2000-11-14
Classification: H03K

Abstract:
A voltage comparator circuit comprising:a comparator stage comprising:a first comparator input terminal;a second comparator input terminal;a third comparator input terminal;a fourth comparator input terminal;a first comparator output terminal; anda second comparator output terminal,said comparator stage producing a first comparator output voltage at said first comparator output terminal equal to one of a first comparator voltage and a second comparator voltage and producing a second comparator output voltage at said second comparator output terminal equal to one of said second comparator voltage and a third comparator voltage, in response to a first comparator input voltage applied to said first comparator input terminal, a second comparator input voltage applied to said second comparator input terminal, and a third comparator input voltage applied to said third comparator input terminal; anda switch comprising a first switch input terminal and a second switch input terminal in electrical communication with said first comparator output terminal and said second comparator output terminal, respectively, and a switch output terminal in electrical communication with said fourth comparator input terminal, said switch producing a switch output voltage at said switch output terminal substantially equal to one of a first reference voltage and a second reference voltage in response to a first switch input voltage applied to said first switch input terminal and a second switch input voltage applied to said second switch input terminal.