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:
May. 12, 2009
Filed:
Jun. 02, 2006
Kurt A. Carlsen, Burlington, VT (US);
Amol A. Joshi, Essex Junction, VT (US);
Faraydon Pakbaz, Milton, VT (US);
Sanjay Upreti, Lexington, KY (US);
Kurt A. Carlsen, Burlington, VT (US);
Amol A. Joshi, Essex Junction, VT (US);
Faraydon Pakbaz, Milton, VT (US);
Sanjay Upreti, Lexington, KY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method of estimating decaps required for an IC during an initial floorplanning design phase begins by obtaining voltage variation waveforms for a plurality of nodes in a power distribution network of the IC. Next, the method computes a minimum value for each of the voltage variation waveforms and selects voltage variation waveforms below a minimum threshold value. Following this, an FDA is performed on the voltage variation waveforms below the minimum threshold value to create a set of frequency values. This involves performing an FFT on each of the voltage variation waveforms to obtain frequency domain data, wherein frequencies that cause a drop in voltage in the plurality of nodes are filtered. The method then sorts the frequency domain data, wherein the frequency domain data is arranged in order based on amplitude value, total power, frequency components, and/or amplitude of imaginary components.