Simulation speed and accuracy
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