Browse Prior Art Database

Method and system to determine board resonance decoupling locations and identify capacitors satisfying a specified board resonance location

IP.com Disclosure Number: IPCOM000033585D
Original Publication Date: 2004-Dec-17
Included in the Prior Art Database: 2004-Dec-17
Document File: 1 page(s) / 36K

Publishing Venue

IBM

Abstract

Disclosed is a method and system to determine board resonance decoupling locations and identify capacitors satisfying a specified board resonance location. The method uses software algorithms to determine desired capacitor location, relevant information, and provides output which the user analyzes to make design changes. By automatic design checking, the potential for user error is reduced and less time is required for review and analysis.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 52% of the total text.

Page 1 of 1

Method and system to determine board resonance decoupling locations and identify capacitors satisfying a specified board resonance location

Decoupling capacitors are used to reduce board resonances in printed circuit boards. Typical methodology is to view the board as an array of grids of dimension specified by the reviewer and require a capacitor in each grid where the two planes to decouple are found. These capacitors do not have to be "dedicated" to board resonance, so capacitors used for integrated circuit (IC) decoupling and signal referencing will also satisfy the requirement. In this latter example, it is useful to know which capacitors already exist within a specific grid to identify any opportunities to eliminate redundant board resonance capacitors. Reviews of this sort are generally done manually within the printed circuit board design tool and can require significant review time.

Disclosed is a software tool which takes user parameters for grid dimension, decoupling capacitor specifics, performs automated checking of the physical board design against these parameters, identifies grids lacking decoupling capacitors based on the input parameters, provides a board-interactive output file for review as well as text output of the "violations" and those capacitors found for grids satisfied. This last feature of the invention allows the user to identify "redundant" capacitors, or those which can be deleted from the design without having negative impact on bo...