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:
Nov. 16, 2010
Filed:
May. 13, 2008
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
A threshold detection circuit includes, in one embodiment, a comparator having a first input connection for receiving a backup voltage from a backup power source, a second input connection for receiving a primary voltage from a primary power source, and an output connection for providing an output voltage; a first resistor and a first capacitor that are coupled in series between the first input connection and the output connection; and a second resistor that is coupled between the first input connection and the output connection, and that is coupled in parallel to the series of first resistor and the first capacitor.