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:
Aug. 10, 2004
Filed:
Jun. 16, 2003
Roland Frech, Ostfildern, DE;
Bernd Garben, Schoenaich, DE;
Hubert Harrer, Schoenaich, DE;
Andreas Huber, Holzgertingen, DE;
Dierk Kaller, Schoenaich, DE;
Erich Klink, Schoenaich, DE;
Thomas-Michael Winkel, Schoenaich, DE;
Wiren Dale Becker, Hyde Park, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method, digital circuit system and program product for reducing delta-I noise in a plurality of activity units connected to a common DC-supply voltage. In order to smooth the fluctuations (delta-I) of a total current demand I, and a respective resulting fluctuation of the supply voltage, a signalling scheme between said activity units and a supervisor unit which holds a system-specific “database” containing at least the current demand of each activity unit device when operating regularly. Dependent of the quantity of calculated, imminent delta-I a subset of said activity units with a respective current I demand is selected and controlled, for either temporarily delaying their beginning of activity in case of an imminent supply voltage drop, or temporarily continuing their activity with a predetermined, activity-specific NO-OP phase in case of an imminent supply voltage rise.