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:
Jul. 01, 2008
Filed:
Oct. 22, 2003
John D. Anderson, Lawrenceville, GA (US);
Michael P. Duggan, Snellville, GA (US);
John D. Anderson, Lawrenceville, GA (US);
Michael P. Duggan, Snellville, GA (US);
Scientific-Atlanta, Inc., Lawrenceville, GA (US);
Abstract
Systems and methods for switching to a back-up power supply are provided. One such system includes a threshold detector circuit; a first switching circuit for enabling access to a first power source, the first switching circuit comprising at least a first transistor; and a second switching circuit for enabling access to a second power source, the second switching circuit comprising at least a second transistor; wherein the threshold detector is configured to cause the second switching circuit to enable access to the second power supply responsive to a voltage provided by the first power supply dropping below a predetermined threshold.