Integrated Placement And Routing For Vlsi Layout Synthesis And Optimization
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| Author | : University of California, Berkeley. Computer Science Division |
| Publisher | : |
| Total Pages | : 272 |
| Release | : 1992 |
| Genre | : Data structures (Computer science) |
| ISBN | : |
This dissertation investigates ways to integrate various VLSI layout algorithms via carefully designed integrated data structures. Such an integrated approach can achieve better overall results by iterating non-sequentially among the various algorithms in a demand-driven manner. The shared data strucure which is modified incrementally by all the different algorithms serves as an efficient communication medium between them This approach has resulted in several new prototype tools, including a new placement program that combines wire-length optimization with a new 2-D compaction algorithm, a new area-routing approach that employs hierarchical rip-up and reroute techniques in an integrated global and detailed routing environment, and also a system that integrates the area router with a placement adjustment algorithm. This integrated system can iterate automatically between area routing and placement adjustment phases to generate optimized results for macro-cell problems with over- the-cell routing.
| Author | : Ping-San Tzeng |
| Publisher | : |
| Total Pages | : 96 |
| Release | : 1992 |
| Genre | : |
| ISBN | : |
| Author | : Prashant Saxena |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 254 |
| Release | : 2007-04-27 |
| Genre | : Technology & Engineering |
| ISBN | : 0387485503 |
This volume provides a complete understanding of the fundamental causes of routing congestion in present-day and next-generation VLSI circuits, offers techniques for estimating and relieving congestion, and provides a critical analysis of the accuracy and effectiveness of these techniques. The book includes metrics and optimization techniques for routing congestion at various stages of the VLSI design flow. The subjects covered include an explanation of why the problem of congestion is important and how it will trend, plus definitions of metrics that are appropriate for measuring congestion, and descriptions of techniques for estimating and optimizing routing congestion issues in cell-/library-based VLSI circuits.
| Author | : Bing Lu |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 292 |
| Release | : 2013-06-29 |
| Genre | : Computers |
| ISBN | : 1475734158 |
Introduction The exponential scaling of feature sizes in semiconductor technologies has side-effects on layout optimization, related to effects such as inter connect delay, noise and crosstalk, signal integrity, parasitics effects, and power dissipation, that invalidate the assumptions that form the basis of previous design methodologies and tools. This book is intended to sample the most important, contemporary, and advanced layout opti mization problems emerging with the advent of very deep submicron technologies in semiconductor processing. We hope that it will stimulate more people to perform research that leads to advances in the design and development of more efficient, effective, and elegant algorithms and design tools. Organization of the Book The book is organized as follows. A multi-stage simulated annealing algorithm that integrates floorplanning and interconnect planning is pre sented in Chapter 1. To reduce the run time, different interconnect plan ning approaches are applied in different ranges of temperatures. Chapter 2 introduces a new design methodology - the interconnect-centric design methodology and its centerpiece, interconnect planning, which consists of physical hierarchy generation, floorplanning with interconnect planning, and interconnect architecture planning. Chapter 3 investigates a net-cut minimization based placement tool, Dragon, which integrates the state of the art partitioning and placement techniques.
| Author | : Dwight Hill |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 221 |
| Release | : 2012-12-06 |
| Genre | : Technology & Engineering |
| ISBN | : 146131707X |
This book describes a system of VLSI layout tools called IDA which stands for "Integrated Design Aides. " It is not a main-line production CAD environment, but neither is it a paper tool. Rather, IDA is an experimental environment that serves to test out CAD ideas in the crucible of real chip design. Many features have been tried in IDA over the years, some successfully, some not. This book will emphasize the former, and attempt to describe the features that have been useful and effective in building real chips. Before discussing the present state of IDA, it may be helpful to understand how the project got started. Although Bell Labs has traditionally had a large and effective effort in VLSI and CAD, researchers at the Murray Hill facility wanted to study the process of VLSI design independently, emphasizing the idea of small team chip building. So, in 1979 they invited Carver Mead to present his views on MOS chip design, complete with the now famous "lambda" design rules and "tall, thin designers. " To support this course, Steve Johnson (better known for YACC and the portable C compiler) and Sally Browning invented the constraint based "i" language and wrote a compiler for it. A small collection of layout tools developed rapidly around this compiler, including design rule checkers, editors and simulators.
| Author | : Michael Anthony Riepe |
| Publisher | : |
| Total Pages | : 606 |
| Release | : 1999 |
| Genre | : Digital electronics |
| ISBN | : |
The automated synthesis of mask geometry for VLSI leaf cells, referred to as the cell synthesis problem, is an important component of any structured custom integrated circuit design environment. Traditional approaches based on the classic functional cell style of Uehara & VanCleemput pose this problem as a straightforward one-dimensional graph optimization problem for which optimal solution methods are known. However, these approaches are only directly applicable to static CMOS circuits and they break down when faced with more exotic logic styles. Our methodology is centered around techniques for the efficient modeling and optimization of geometry sharing. Chains of diffusion-merged transistors are formed explicitly and their ordering optimized for area and global routing. In addition, more arbitrary merged structures are supported by allowing electrically compatible adjacent transistors to overlap during placement. The synthesis flow in TEMPO begins with a static transistor chain formation step. These chains are broken at the diffusion breaks and the resulting sub-chains passed to the placement step. During placement, an ordering is found for each chain and a location and orientation is assigned to each sub-chain. Different chain orderings affect the placement by changing the relative sizes of the sub-chains and their routing contribution. We conclude with a detailed routing step and an optional compaction step.
| Author | : Gi-Joon Nam |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 330 |
| Release | : 2007-08-26 |
| Genre | : Technology & Engineering |
| ISBN | : 0387687394 |
This book covers advanced techniques in modern circuit placement. It details all of most recent placement techniques available in the field and analyzes the optimality of these techniques. Coverage includes all the academic placement tools that competed against one another on the same industrial benchmark circuits at the International Symposium on Physical Design (ISPD), these techniques are also extensively being used in industrial tools as well. The book provides significant amounts of analysis on each technique such as trade-offs between quality-of-results (QoR) and runtime.
| Author | : Andrew B. Kahng |
| Publisher | : Springer Nature |
| Total Pages | : 329 |
| Release | : 2022-06-14 |
| Genre | : Technology & Engineering |
| ISBN | : 3030964159 |
The complexity of modern chip design requires extensive use of specialized software throughout the process. To achieve the best results, a user of this software needs a high-level understanding of the underlying mathematical models and algorithms. In addition, a developer of such software must have a keen understanding of relevant computer science aspects, including algorithmic performance bottlenecks and how various algorithms operate and interact. This book introduces and compares the fundamental algorithms that are used during the IC physical design phase, wherein a geometric chip layout is produced starting from an abstract circuit design. This updated second edition includes recent advancements in the state-of-the-art of physical design, and builds upon foundational coverage of essential and fundamental techniques. Numerous examples and tasks with solutions increase the clarity of presentation and facilitate deeper understanding. A comprehensive set of slides is available on the Internet for each chapter, simplifying use of the book in instructional settings. “This improved, second edition of the book will continue to serve the EDA and design community well. It is a foundational text and reference for the next generation of professionals who will be called on to continue the advancement of our chip design tools and design the most advanced micro-electronics.” Dr. Leon Stok, Vice President, Electronic Design Automation, IBM Systems Group “This is the book I wish I had when I taught EDA in the past, and the one I’m using from now on.” Dr. Louis K. Scheffer, Howard Hughes Medical Institute “I would happily use this book when teaching Physical Design. I know of no other work that’s as comprehensive and up-to-date, with algorithmic focus and clear pseudocode for the key algorithms. The book is beautifully designed!” Prof. John P. Hayes, University of Michigan “The entire field of electronic design automation owes the authors a great debt for providing a single coherent source on physical design that is clear and tutorial in nature, while providing details on key state-of-the-art topics such as timing closure.” Prof. Kurt Keutzer, University of California, Berkeley “An excellent balance of the basics and more advanced concepts, presented by top experts in the field.” Prof. Sachin Sapatnekar, University of Minnesota
| Author | : Cristinel Ababei |
| Publisher | : |
| Total Pages | : 296 |
| Release | : 2004 |
| Genre | : |
| ISBN | : |
| Author | : Helmut E. Graeb |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 302 |
| Release | : 2010-09-28 |
| Genre | : Technology & Engineering |
| ISBN | : 1441969322 |
Integrated circuits are fundamental electronic components in biomedical, automotive and many other technical systems. A small, yet crucial part of a chip consists of analog circuitry. This part is still in large part designed by hand and therefore represents not only a bottleneck in the design flow, but also a permanent source of design errors responsible for re-designs, costly in terms of wasted test chips and in terms of lost time-to-market. Layout design is the step of the analog design flow with the least support by commercially available, computer-aided design tools. This book provides a survey of promising new approaches to automated, analog layout design, which have been described recently and are rapidly being adopted in industry.
