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Author: Publisher: ISBN: Category : Electric filters, Active Languages : en Pages : 103
Book Description
The manufacturing yield, overkill, and defect level limit the feasibility of analog circuits in SoCs. The conventional method of handling process and environmental variation is to assign a design margin such that the design meets specifications at several processes and environmental corners. However, checking only extreme corners limits performance in comparison to the more rigorous statistical approach of the computing manufacturing and quality figure of merit. The statistical approach requires transistor-level simulation of hundreds or even thousands of samples, not just a few corners, and thus is very time consuming. This research offers a method for reducing the time required for the statistical approach by characterizing each of the many samples of building blocks once at the transistor level. The building blocks are scalable such that the statistics are preserved when a building block is adjusted to the requirement of a higher-level design. Many design scenarios can be rapidly explored by assembling and scaling the building block samples without SPICE simulation. This study employs a continuous time low-pass filter design example to extract the requirements of the building block approach. The requirements include a method to assemble building blocks (biquad element for the example) into a filter design while preserving the statistics that would have been extracted by simulation of the entire filter at the transistor level. The assembly method for both linear and nonlinear response is proposed.
Author: Publisher: ISBN: Category : Electric filters, Active Languages : en Pages : 103
Book Description
The manufacturing yield, overkill, and defect level limit the feasibility of analog circuits in SoCs. The conventional method of handling process and environmental variation is to assign a design margin such that the design meets specifications at several processes and environmental corners. However, checking only extreme corners limits performance in comparison to the more rigorous statistical approach of the computing manufacturing and quality figure of merit. The statistical approach requires transistor-level simulation of hundreds or even thousands of samples, not just a few corners, and thus is very time consuming. This research offers a method for reducing the time required for the statistical approach by characterizing each of the many samples of building blocks once at the transistor level. The building blocks are scalable such that the statistics are preserved when a building block is adjusted to the requirement of a higher-level design. Many design scenarios can be rapidly explored by assembling and scaling the building block samples without SPICE simulation. This study employs a continuous time low-pass filter design example to extract the requirements of the building block approach. The requirements include a method to assemble building blocks (biquad element for the example) into a filter design while preserving the statistics that would have been extracted by simulation of the entire filter at the transistor level. The assembly method for both linear and nonlinear response is proposed.
Author: Michael Orshansky Publisher: Springer Science & Business Media ISBN: 0387690115 Category : Technology & Engineering Languages : en Pages : 319
Book Description
Design for Manufacturability and Statistical Design: A Comprehensive Approach presents a comprehensive overview of methods that need to be mastered in understanding state-of-the-art design for manufacturability and statistical design methodologies. Broadly, design for manufacturability is a set of techniques that attempt to fix the systematic sources of variability, such as those due to photolithography and CMP. Statistical design, on the other hand, deals with the random sources of variability. Both paradigms operate within a common framework, and their joint comprehensive treatment is one of the objectives of this book and an important differentation.
Author: Koen Lampaert Publisher: Springer Science & Business Media ISBN: 147574501X Category : Technology & Engineering Languages : en Pages : 186
Book Description
Analog integrated circuits are very important as interfaces between the digital parts of integrated electronic systems and the outside world. A large portion of the effort involved in designing these circuits is spent in the layout phase. Whereas the physical design of digital circuits is automated to a large extent, the layout of analog circuits is still a manual, time-consuming and error-prone task. This is mainly due to the continuous nature of analog signals, which causes analog circuit performance to be very sensitive to layout parasitics. The parasitic elements associated with interconnect wires cause loading and coupling effects that degrade the frequency behaviour and the noise performance of analog circuits. Device mismatch and thermal effects put a fundamental limit on the achievable accuracy of circuits. For successful automation of analog layout, advanced place and route tools that can handle these critical parasitics are required. In the past, automatic analog layout tools tried to optimize the layout without quantifying the performance degradation introduced by layout parasitics. Therefore, it was not guaranteed that the resulting layout met the specifications and one or more layout iterations could be needed. In Analog Layout Generation for Performance and Manufacturability, the authors propose a performance driven layout strategy to overcome this problem. In this methodology, the layout tools are driven by performance constraints, such that the final layout, with parasitic effects, still satisfies the specifications of the circuit. The performance degradation associated with an intermediate layout solution is evaluated at runtime using predetermined sensitivities. In contrast with other performance driven layout methodologies, the tools proposed in this book operate directly on the performance constraints, without an intermediate parasitic constraint generation step. This approach makes a complete and sensible trade-off between the different layout alternatives possible at runtime and therefore eliminates the possible feedback route between constraint derivation, placement and layout extraction. Besides its influence on the performance, layout also has a profound impact on the yield and testability of an analog circuit. In Analog Layout Generation for Performance and Manufacturability, the authors outline a new criterion to quantify the detectability of a fault and combine this with a yield model to evaluate the testability of an integrated circuit layout. They then integrate this technique with their performance driven routing algorithm to produce layouts that have optimal manufacturability while still meeting their performance specifications. Analog Layout Generation for Performance and Manufacturability will be of interest to analog engineers, researchers and students.
Author: Rob A. Rutenbar Publisher: John Wiley & Sons ISBN: 047122782X Category : Technology & Engineering Languages : en Pages : 773
Book Description
The tools and techniques you need to break the analog design bottleneck! Ten years ago, analog seemed to be a dead-end technology. Today, System-on-Chip (SoC) designs are increasingly mixed-signal designs. With the advent of application-specific integrated circuits (ASIC) technologies that can integrate both analog and digital functions on a single chip, analog has become more crucial than ever to the design process. Today, designers are moving beyond hand-crafted, one-transistor-at-a-time methods. They are using new circuit and physical synthesis tools to design practical analog circuits; new modeling and analysis tools to allow rapid exploration of system level alternatives; and new simulation tools to provide accurate answers for analog circuit behaviors and interactions that were considered impossible to handle only a few years ago. To give circuit designers and CAD professionals a better understanding of the history and the current state of the art in the field, this volume collects in one place the essential set of analog CAD papers that form the foundation of today's new analog design automation tools. Areas covered are: * Analog synthesis * Symbolic analysis * Analog layout * Analog modeling and analysis * Specialized analog simulation * Circuit centering and yield optimization * Circuit testing Computer-Aided Design of Analog Integrated Circuits and Systems is the cutting-edge reference that will be an invaluable resource for every semiconductor circuit designer and CAD professional who hopes to break the analog design bottleneck.
Author: Ban P. Wong Publisher: John Wiley & Sons ISBN: 0470382813 Category : Technology & Engineering Languages : en Pages : 408
Book Description
Discover innovative tools that pave the way from circuit and physical design to fabrication processing Nano-CMOS Design for Manufacturability examines the challenges that design engineers face in the nano-scaled era, such as exacerbated effects and the proven design for manufacturability (DFM) methodology in the midst of increasing variability and design process interactions. In addition to discussing the difficulties brought on by the continued dimensional scaling in conformance with Moore's law, the authors also tackle complex issues in the design process to overcome the difficulties, including the use of a functional first silicon to support a predictable product ramp. Moreover, they introduce several emerging concepts, including stress proximity effects, contour-based extraction, and design process interactions. This book is the sequel to Nano-CMOS Circuit and Physical Design, taking design to technology nodes beyond 65nm geometries. It is divided into three parts: Part One, Newly Exacerbated Effects, introduces the newly exacerbated effects that require designers' attention, beginning with a discussion of the lithography aspects of DFM, followed by the impact of layout on transistor performance Part Two, Design Solutions, examines how to mitigate the impact of process effects, discussing the methodology needed to make sub-wavelength patterning technology work in manufacturing, as well as design solutions to deal with signal, power integrity, WELL, stress proximity effects, and process variability Part Three, The Road to DFM, describes new tools needed to support DFM efforts, including an auto-correction tool capable of fixing the layout of cells with multiple optimization goals, followed by a look ahead into the future of DFM Throughout the book, real-world examples simplify complex concepts, helping readers see how they can successfully handle projects on Nano-CMOS nodes. It provides a bridge that allows engineers to go from physical and circuit design to fabrication processing and, in short, make designs that are not only functional, but that also meet power and performance goals within the design schedule.
Author: John F. Holland Publisher: ISBN: Category : Languages : en Pages : 248
Book Description
The purpose of this design manual is to present curves which allow the design engineer to evaluate the performance of an A-D-A system. The manual gives an overview of A-D-A system analysis and experimental methods for measuring performance. Quantization design curves are then given for linearly and logarithmically companded quantizers. Aliasing error design curves are given for Butterworth and Chebyshev spectrums, and the effect of dither signals is examined.
Author: Xin Li Publisher: Now Publishers Inc ISBN: 1601980566 Category : Computers Languages : en Pages : 161
Book Description
Statistical Performance Modeling and Optimization reviews various statistical methodologies that have been recently developed to model, analyze and optimize performance variations at both transistor level and system level in integrated circuit (IC) design. The following topics are discussed in detail: sources of process variations, variation characterization and modeling, Monte Carlo analysis, response surface modeling, statistical timing and leakage analysis, probability distribution extraction, parametric yield estimation and robust IC optimization. These techniques provide the necessary CAD infrastructure that facilitates the bold move from deterministic, corner-based IC design toward statistical and probabilistic design. Statistical Performance Modeling and Optimization reviews and compares different statistical IC analysis and optimization techniques, and analyzes their trade-offs for practical industrial applications. It serves as a valuable reference for researchers, students and CAD practitioners.
Author: Esteban Tlelo-Cuautle Publisher: BoD – Books on Demand ISBN: 9533073233 Category : Technology & Engineering Languages : en Pages : 384
Book Description
This book highlights key design issues and challenges to guarantee the development of successful applications of analog circuits. Researchers around the world share acquired experience and insights to develop advances in analog circuit design, modeling and simulation. The key contributions of the sixteen chapters focus on recent advances in analog circuits to accomplish academic or industrial target specifications.
Book Description
"The last couple of years have been very busy for the semiconductor industry and researchers. The rapid speed of production channel length reduction has brought lithographic challenges to semiconductor modeling. These include stress optimization, transisto"
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Author: Michael Orshansky
Author: Ming Qu
Author: Koen Lampaert
Author: Rob A. Rutenbar
Author: Ban P. Wong
Author: John F. Holland
Author: Xin Li
Author: Esteban Tlelo-Cuautle
Author: Rasit Onur Topaloglu