Anasim » grid http://www.anasim.com Your Total Power Integrity Team Tue, 03 Aug 2010 20:12:09 +0000 http://wordpress.org/?v=2.9.1 en hourly 1 Simulation speed and accuracy http://www.anasim.com/pi-fp/simulation-speed-and-accuracy/ http://www.anasim.com/pi-fp/simulation-speed-and-accuracy/#comments Sun, 05 Jul 2009 16:11:36 +0000 Raj http://www.anasim.com/?p=142 As simulation complexity in the number of elements explodes in the nanoscale regime (sub-100nm), tools face a difficult choice in reducing simulation times, where model accuracy is compromised. Tools employing model simplifications commonly claim 5% SPICE accuracy, or worse, which consumes design margin available for power integrity, and adds uncertainty. Besides, model simplification with large numbers of interacting inductors and capacitors is a complex task.

pi-fp, with continuum modeling, and distributed electrical parameters, load, and capacitance modeling, does not compromise simulation accuracy for speed, but reduces simulation resolution instead. By increasing the unit area simulated, from 50u by 50u to 100u by 100u, simulation speed in pi-fp is enhanced by at least a factor of 4, with no loss of grid voltage variation accuracy.

For more information: pi-fp brochure

]]> http://www.anasim.com/pi-fp/simulation-speed-and-accuracy/feed/ 0 Grid Noise Simulation Software for Windows(tm) http://www.anasim.com/ecd/grid-noise-simulation-software-for-windowstm/ http://www.anasim.com/ecd/grid-noise-simulation-software-for-windowstm/#comments Sun, 12 Apr 2009 06:26:19 +0000 Raj http://www.anasim.com/?p=32 RLCSim is a Windows(tm) executable that performs noise analysis on a power grid over a circuit block. This tool, a pre-cursor of pi-fp, considers grid resistance (IR drop), inductance (L*di/dt) or voltage droop, and distributed capacitance that absorbs transients, and displays noise propagation and summing within the block.

Inputs include grid parameters, block power consumption profiles and capacitance.

FREE RLCSim Windows(tm) ZIP Download

Shown below is a noise simulation result using RLCSIM demonstrating detrimental effects of lens-shaped on-chip decoupling capacitance structure. Power grid noise from an on-chip source is focused behind the capacitance structure, illustrating distributed true-electromagnetic simulation capability absent in other power integrity analysis tools.

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Download a full-size version of the animation here

]]> http://www.anasim.com/ecd/grid-noise-simulation-software-for-windowstm/feed/ 0 Anasim Power Integrity Aware Methodology http://www.anasim.com/methodology/anasim-power-integrity-aware-methodology/ http://www.anasim.com/methodology/anasim-power-integrity-aware-methodology/#comments Sat, 11 Apr 2009 16:33:27 +0000 Prathik Raj http://www.anasim.com/?p=19 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

Power-Integrity (PI) aware ULSI design flow

Click to enlarge image

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