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:
Apr. 20, 2010
Filed:
Dec. 12, 2007
Dino A. Toffolon, Stoney Creek, CA;
Chris Dietrich, Mississauga, CA;
Dino A. Toffolon, Stoney Creek, CA;
Chris Dietrich, Mississauga, CA;
Synopsys, Inc., Mountain View, CA (US);
Abstract
Embodiments of the present invention provide a system that controls noise in a power system that includes a power rail and a ground rail. The system includes a MOS transistor coupled in series with a decoupling capacitor between the power rail and the ground rail and an inductive packaging connection coupled to the power rail in parallel with the MOS transistor and the decoupling capacitor. The combination of MOS transistor, decoupling capacitor, and inductive packaging connection form a resonant circuit. During operation, the system determines if there is noise in a Vsignal on the power rail. Based on the noise present in the Vsignal, the system adjusts the impedance of the MOS transistor to reduce the noise in a frequency range near a frequency of interest (ω) of the resonant circuit without causing an unnecessary increase in switching noise at other frequencies.