Analog Device-Level Layout Automation: 263 (The Springer International Series in Engineering and Computer Science, 263) - Hardcover

Cohn, John M.; Garrod, David J.; Rutenbar, Rob A.; Carley, Rick

Hardcover

ISBN 10: 0792394313 ISBN 13: 9780792394310

Publisher: Springer, 1994

Synopsis

This book presents a detailed summary of research on automatic layout of device-level analog circuits that was undertaken in the late 1980s and early 1990s at Carnegie Mellon University. We focus on the work behind the creation of the tools called KOAN and ANAGRAM II, which form part of the core of the CMU ACACIA analog CAD system. KOAN is a device placer for custom analog cells; ANANGRAM II a detailed area router for these analog cells. We strive to present the motivations behind the architecture of these tools, including detailed discussion of the subtle technology and circuit concerns that must be addressed in any successful analog or mixed-signal layout tool. Our approach in organizing the chapters of the book has been to present our algo­ rithms as a series of responses to these very real and very difficult analog layout problems. Finally, we present numerous examples of results generated by our algorithms. This research was supported in part by the Semiconductor Research Corpora­ tion, by the National Science Foundation, by Harris Semiconductor, and by the International Business Machines Corporation Resident Study Program. Finally, just for the record: John Cohn was the designer of the KOAN placer; David Garrod was the designer of the ANAGRAM II router (and its predeces­ sor, ANAGRAM I). This book was architected by all four authors, edited by John Cohn and Rob Rutenbar, and produced in finished form by John Cohn.

About this title

Product Description

Hardcover

Synopsis

This monograph addresses the problem of device layout for high-performance custom analog cells. In particular, an alternative placement and routing formulation is proposed that is designed to minimize the cost in layout quality that is traditionally associated with analog layout automation. The goal of analog layout is to minimize the effects of layout induced performance degradation while, at the same time, to maximize the area utilization of the circuit. Human layout experts observe a variety of analog-specific layout constraints and exploit a range of geometric optimizations to achieve these performance and density goals.This work is directed at discovering how these constraints and optimizations can best be incorporated into automatic layout optimization. Two of the products of this research are a new analog device-level placer, Koan, and a new analog device-level router, Anagram II [40], which incorporate a more comprehensive set of layout constraints and geometric optimizations than in any previous systems. "Analog Device-Level Layout Automation" focuses on the formulation, algorithms, and certain relevant implementation details of Koan and Anagram II.

Edition details

• Publisher: Springer
• Publication date: 1994
• Language: English
• ISBN 10: 0792394313
• ISBN 13: 9780792394310
• Binding: Hardcover
• Number of pages: 303