VLSI Design

VLSI Design / 1998 / Article
Special Issue

Computational Electronics

View this Special Issue

Open Access

Volume 8 |Article ID 34303 | 5 pages | https://doi.org/10.1155/1998/34303

Numerical Evaluation of Iterative Schemes for Drift-diffusion Simulation

Abstract

We introduce an iterative scheme to solve the drift-diffusion device simulation problem, which combines the Gummel iteration with the “pointwise iteration”, and then we compare its convergence behavior with other iteration strategies, for different test cases. Comparisons are made with the standard Gummel approach and a nonlinear multigrid iteration. The combined “Gummel-Pointwise” iteration has significantly better convergence characteristics than the Gummel iteration in all cases. The cost of the pointwise iteration varies only linearly with the number of grid points. While in terms of CPU time for the solution the pointwise iteration is not always faster in 2-D, in 3-D the combined technique becomes more and more advantageous as the grid size increases. It is found that the nonlinear multigrid scheme is overall not as effective as the combined iteration.

Copyright © 1998 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


More related articles

0 Views | 0 Downloads | 0 Citations
 PDF  Download Citation  Citation
 Order printed copiesOrder

Related articles

We are committed to sharing findings related to COVID-19 as quickly and safely as possible. Any author submitting a COVID-19 paper should notify us at help@hindawi.com to ensure their research is fast-tracked and made available on a preprint server as soon as possible. We will be providing unlimited waivers of publication charges for accepted articles related to COVID-19. Sign up here as a reviewer to help fast-track new submissions.