Anasim » grid simulation

Continuum (Analog) Analysis for Power Integrity

Raj — Sat, 12 Jun 2010 21:27:35 +0000

June 2010: Power Integrity (PI) analysis has traditionally been conducted using lumped, discrete elements and circuits, which lead to exponential simulation complexity, approximate models, and often, inaccurate results. In continuum-models based analysis, a chip power grid and distribution network is modeled as a continuous surface, employing distributed models for circuits and capacitance. This not only eliminates the exploding computational complexity for PI analysis in nanoscale chips, it facilitates physical, true-electromagnetic simulations for chips, packages, and 3D assemblies. Continuum-models based analysis is “analog” in the sense that a layer to be analyzed is treated as a spatial potential or voltage continuum, similar to analog signals being time-continuous in nature, as opposed to analyzing discrete elements and their interactions.

Read more on this in a SOCcentral featured article. A comprehensive treatment of Continuum Modeling is accessible in Anasim’s PI book for IC’s.

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Effective Current Density

Prathik Raj — Sat, 11 Apr 2009 17:46:15 +0000

Download/View (PDF): Effective Current Density.pdf

Anasim Overview

Prathik Raj — Sat, 11 Apr 2009 17:07:53 +0000

Click here to download the PPT source with animations.

Anasim Power Integrity Aware Methodology

Prathik Raj — Sat, 11 Apr 2009 16:33:27 +0000

A power-integrity-aware physical design methodology enables front-end optimization of power grid metal resource usage, decoupling capacitance planning and placement, and significantly relaxes routing constraints.

Power-Integrity (PI) aware ULSI design flow

Click to enlarge image