The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 02, 2009
Filed:
Nov. 06, 2006
Mark Chamberlain, Honeoye Falls, NY (US);
Timothy Vogl, Rochester, NY (US);
Gary Schwenck, Webster, NY (US);
Mark Chamberlain, Honeoye Falls, NY (US);
Timothy Vogl, Rochester, NY (US);
Gary Schwenck, Webster, NY (US);
Harris Corporation, Melbourne, FL (US);
Abstract
A circuit () is provided that is connectable between input lines () and output lines (). The circuit is comprised of a primary battery () and a hold-up battery (). The hold-up battery is connected in parallel with the primary battery. The circuit is further comprised of an RC circuit () connected in parallel with the primary battery and is isolated from the hold-up battery by unidirectional current valves (). A comparator is provided with a first input () coupled to the RC circuit and a second input () coupled to a voltage reference. A switching device () is provided that is controlled by an output of the comparator. The switching device connects the hold-up battery to output lines in a first state and disconnects the hold-up battery from output lines in a second state. The unidirectional current valves prevent reverse leakage current from the hold-up battery from charging a capacitor during a discharge period of the RC circuit.