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:
Dec. 10, 2002
Filed:
Mar. 27, 2002
Terry C. Coughlin, Jr., Endicott, NY (US);
Roger P. Gregor, Endicott, NY (US);
Steven F. Oakland, Colchester, VT (US);
Douglas W. Stout, Milton, VT (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A state saving circuit and method for using the same. The circuit comprises a first latch powered by an uninterrupted power supply, wherein the first latch includes a first pair of cross coupled inverters for storing data, and includes an input cut-off control for isolating the data in the first pair of cross coupled inverters; a second latch coupled to an output of the first latch and powered by an interruptible power supply, wherein the second latch includes a second pair of cross coupled inverters and a clock input for latching the data from the first latch to the second latch; and wherein an interruption of power to the second latch results in a state being saved in the first latch.