Layout Minimization Of Cmos Cells

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Layout Minimization Of Cmos Cells

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Author : Robert L. Maziasz
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06

Layout Minimization Of Cmos Cells written by Robert L. Maziasz and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Technology & Engineering categories.

The layout of an integrated circuit (lC) is the process of assigning geometric shape, size and position to the components (transistors and connections) used in its fabrication. Since the number of components in modem ICs is enormous, computer aided-design (CAD) programs are required to automate the difficult layout process. Prior CAD methods are inexact or limited in scope, and produce layouts whose area, and consequently manufacturing costs, are larger than necessary. This book addresses the problem of minimizing exactly the layout area of an important class of basic IC structures called CMOS cells. First, we precisely define the possible goals in area minimization for such cells, namely width and height minimization, with allowance for area-reducing reordering of transistors. We reformulate the layout problem in terms of a graph model and develop new graph-theoretic concepts that completely characterize the fundamental area minimization problems for series-parallel and nonseries-parallel circuits. These concepts lead to practical algorithms that solve all the basic layout minimization problems exactly, both for a single cell and for a one-dimensional array of such cells. Although a few of these layout problems have been solved or partially solved previously, we present here the first complete solutions to all the problems of interest.

Integer Programming Based Layout Synthesis Of Two Dimensional Cmos Cells

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Author : Ananeendra Gupta
language : en
Publisher:
Release Date : 1997

Integer Programming Based Layout Synthesis Of Two Dimensional Cmos Cells written by Ananeendra Gupta and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.

Transistor Level Micro Placement And Routing For Two Dimensional Digital Vlsi Cell Synthesis

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Author : Michael Anthony Riepe
language : en
Publisher:
Release Date : 1999

Transistor Level Micro Placement And Routing For Two Dimensional Digital Vlsi Cell Synthesis written by Michael Anthony Riepe and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Digital electronics categories.

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.

Direct Transistor Level Layout For Digital Blocks

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Author : Prakash Gopalakrishnan
language : en
Publisher: Springer Science & Business Media
Release Date : 2006-01-16

Direct Transistor Level Layout For Digital Blocks written by Prakash Gopalakrishnan and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-01-16 with Technology & Engineering categories.

Cell-based design methodologies have dominated layout generation of digital circuits. Unfortunately, the growing demands for transparent process portability, increased performance, and low-level device sizing for timing/power are poorly handled in a fixed cell library. Direct Transistor-Level Layout For Digital Blocks proposes a direct transistor-level layout approach for small blocks of custom digital logic as an alternative that better accommodates demands for device-level flexibility. This approach captures essential shape-level optimizations, yet scales easily to netlists with thousands of devices, and incorporates timing optimization during layout. The key idea is early identification of essential diffusion-merged MOS device groups, and their preservation in an uncommitted geometric form until the very end of detailed placement. Roughly speaking, essential groups are extracted early from the transistor-level netlist, placed globally, optimized locally, and then finally committed each to a specific shape-level form while concurrently optimizing for both density and routability. The essential flaw in prior efforts is an over-reliance on geometric assumptions from large-scale cell-based layout algorithms. Individual transistors may seem simple, but they do not pack as gates do. Algorithms that ignore these shape-level issues suffer the consequences when thousands of devices are poorly packed. The approach described in this book can pack devices much more densely than a typical cell-based layout. Direct Transistor-Level Layout For Digital Blocks is a comprehensive reference work on device-level layout optimization, which will be valuable to CAD tool and circuit designers.

Vlsi Systems On A Chip

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Author : Luis Miguel Silveira
language : en
Publisher: Springer
Release Date : 2013-11-11

Vlsi Systems On A Chip written by Luis Miguel Silveira and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-11-11 with Technology & Engineering categories.

For over three decades now, silicon capacity has steadily been doubling every year and a half with equally staggering improvements continuously being observed in operating speeds. This increase in capacity has allowed for more complex systems to be built on a single silicon chip. Coupled with this functionality increase, speed improvements have fueled tremendous advancements in computing and have enabled new multi-media applications. Such trends, aimed at integrating higher levels of circuit functionality are tightly related to an emphasis on compactness in consumer electronic products and a widespread growth and interest in wireless communications and products. These trends are expected to persist for some time as technology and design methodologies continue to evolve and the era of Systems on a Chip has definitely come of age. While technology improvements and spiraling silicon capacity allow designers to pack more functions onto a single piece of silicon, they also highlight a pressing challenge for system designers to keep up with such amazing complexity. To handle higher operating speeds and the constraints of portability and connectivity, new circuit techniques have appeared. Intensive research and progress in EDA tools, design methodologies and techniques is required to empower designers with the ability to make efficient use of the potential offered by this increasing silicon capacity and complexity and to enable them to design, test, verify and build such systems.

Design Of System On A Chip

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Author : Ricardo Reis
language : en
Publisher: Springer Science & Business Media
Release Date : 2004-07-14

Design Of System On A Chip written by Ricardo Reis and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004-07-14 with Computers categories.

Design of System on a Chip is the first of two volumes addressing the design challenges associated with new generations of the semiconductor technology. The various chapters are the compilations of tutorials presented at workshops in Brazil in the recent years by prominent authors from all over the world. In particular the first book deals with components and circuits. Device models have to satisfy the conditions to be computationally economical in addition to be accurate and to scale over various generations of technology. In addition the book addresses issues of the parasitic behavior of deep sub-micron components, such as parameter variations and sub-threshold effects. Furthermore various authors deal with items like mixed signal components and memories. We wind up with an exposition of the technology problems to be solved if our community wants to maintain the pace of the "International Technology Roadmap for Semiconductors" (ITRS).

Science Abstracts

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Author :
language : en
Publisher:
Release Date : 1995

Science Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Electrical engineering categories.

Vlsi Algorithms And Architectures

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Author : Fillia Makedon
language : en
Publisher: Springer Science & Business Media
Release Date : 1986-06

Vlsi Algorithms And Architectures written by Fillia Makedon and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986-06 with Computers categories.

Introduction to the temporal logic of - in particular paral- lel - programs.Divided into three main parts: - Presenta- tion of the pure temporal logic: language, semantics, and proof theory; - Representation of programs and their proper- ties within the language of temporal logic; - Application of the logical apparatus to the verification of program proper- ties including a new embedding of Hoare's logic into the temporal framework.

Vlsi Physical Design Automation Theory And Practice

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Author : Sadiq M Sait
language : en
Publisher: World Scientific Publishing Company
Release Date : 1999-10-04

Vlsi Physical Design Automation Theory And Practice written by Sadiq M Sait and has been published by World Scientific Publishing Company this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999-10-04 with Computers categories.

VLSI is an important area of electronic and computer engineering. However, there are few textbooks available for undergraduate/postgraduate study of VLSI design automation and chip layout. VLSI Physical Design Automation: Theory and Practice fills the void and is an essential introduction for senior undergraduates, postgraduates and anyone starting work in the field of CAD for VLSI. It covers all aspects of physical design, together with such related areas as automatic cell generation, silicon compilation, layout editors and compaction. A problem-solving approach is adopted and each solution is illustrated with examples. Each topic is treated in a standard format: Problem Definition, Cost Functions and Constraints, Possible Approaches and Latest Developments.Special features: The book deals with all aspects of VLSI physical design, from partitioning and floorplanning to layout generation and silicon compilation; provides a comprehensive treatment of most of the popular algorithms; covers the latest developments and gives a bibliography for further research; offers numerous fully described examples, problems and programming exercises.

Exact Layout Area Minimization Od Static Cmos Cells

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Author : Robert L. Maziasz
language : en
Publisher:
Release Date : 1993

Exact Layout Area Minimization Od Static Cmos Cells written by Robert L. Maziasz and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with categories.