Download or read book Delay Free Realization of Asynchronous Sequential Switching Circuits Using Constrained Gate Delay Ratios written by Steven Robert Palmquist and published by . This book was released on 1973 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: Asynchronous sequential circuits are sequential circuits which do not make use of a synchronizing clock signal. Such asynchronous circuits often fail to perform as predicted by their Boolean descriptions. This is due to the fact that physical switching elements exhibit inertial and stray delays which may cause a network to produce transient outputs unpredictable by Boolean algebra. Circuit malfunctions of this type are referred to as various forms of hazards. Existing methods for elimination of the effects of various types of combinational and sequential hazards may introduce new problems or simply be tedious to use. For example, the effects of combinational hazards can be eliminated by introducing redundant gates. It is the purpose of the paper to demonstrate methods of solving these problems using a knowledge of constrained maximum and minimum gate delays.

Download or read book Delay Free Realization of Asynchronous Sequential Switching Circuits written by Richard Louis Duncan and published by . This book was released on 1972 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Asynchronous sequential circuits are sequential circuits which are free of a synchronizing clock signal. Asynchronous circuits allow the circuit designer to use the maximum available speed of his devices; however, the lack of synchronism may cause problems in the operation of some circuits. Unwanted output changes, or hazards, may occur in the output due to different parts of the circuit switching at different times. Hazards occurring in the feedback variables, or a race between two variables could cause the circuit to make a transition to a different state than the desired one. (Author).

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1974 with total page 992 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Asynchronous Circuit Design for VLSI Signal Processing written by Teresa H. Meng and published by Springer Science & Business Media. This book was released on 2011-06-27 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: Asynchronous Circuit Design for VLSI Signal Processing is a collection of research papers on recent advances in the area of specification, design and analysis of asynchronous circuits and systems. This interest in designing digital computing systems without a global clock is prompted by the ever growing difficulty in adopting global synchronization as the only efficient means to system timing. Asynchronous circuits and systems have long held interest for circuit designers and researchers alike because of the inherent challenge involved in designing these circuits, as well as developing design techniques for them. The frontier research in this area can be traced back to Huffman's publications `The Synthesis of Sequential Switching Circuits' in 1954 followed by Unger's book, `Asynchronous Sequential Switching Circuits' in 1969 where a theoretical foundation for handling logic hazards was established. In the last few years a growing number of researchers have joined force in unveiling the mystery of designing correct asynchronous circuits, and better yet, have produced several alternatives in automatic synthesis and verification of such circuits. This collection of research papers represents a balanced view of current research efforts in the design, synthesis and verification of asynchronous systems.

Download or read book Asynchronous Sequential Switching Circuits written by Stephen H. Unger and published by . This book was released on 1983 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Asynchronous Circuits written by Janusz A. Brzozowski and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, there has been a great surge of interest in asynchronous circuits, largely through the development of new asynchronous design methodologies. This book provides a comprehensive theory of asynchronous circuits, including modelling, analysis, simulation, specification, verification, and an introduction to their design.

Download or read book Design of Asynchronous Sequential Circuits with Asynchronous Unit Delays written by Shanker Singh and published by . This book was released on 1968 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Designing Asynchronous Circuits using NULL Convention Logic NCL written by Scott Smith and published by Springer Nature. This book was released on 2022-06-01 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: Designing Asynchronous Circuits using NULL Convention Logic (NCL) begins with an introduction to asynchronous (clockless) logic in general, and then focuses on delay-insensitive asynchronous logic design using the NCL paradigm. The book details design of input-complete and observable dual-rail and quad-rail combinational circuits, and then discusses implementation of sequential circuits, which require datapath feedback. Next, throughput optimization techniques are presented, including pipelining, embedding registration, early completion, and NULL cycle reduction. Subsequently, low-power design techniques, such as wavefront steering and Multi-Threshold CMOS (MTCMOS) for NCL, are discussed. The book culminates with a comprehensive design example of an optimized Greatest Common Divisor circuit. Readers should have prior knowledge of basic logic design concepts, such as Boolean algebra and Karnaugh maps. After studying this book, readers should have a good understanding of the differences between asynchronous and synchronous circuits, and should be able to design arbitrary NCL circuits, optimized for area, throughput, and power. Table of Contents: Introduction to Asynchronous Logic / Overview of NULL Convention Logic (NCL) / Combinational NCL Circuit Design / Sequential NCL Circuit Design / NCL Throughput Optimization / Low-Power NCL Design / Comprehensive NCL Design Example

Download or read book The Summary of Engineering Research written by University of Illinois at Urbana-Champaign. Office of Engineering Publications and published by . This book was released on 1974 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Announcements written by and published by . This book was released on 1973 with total page 1288 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Computer Aided Design of Digital Systems written by William Magda VanCleemput and published by . This book was released on 1976 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1973 with total page 1296 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Signal Transition Graph Constraints for Synthesis of Hazard free Asynchronous Circuits with Unbounded gate Delays written by Radhakrishna Nagalla and published by . This book was released on 1993 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: "A synthesis procedure for asynchronous control circuits from a high level specification, signal transition graph (STG), is described. In this paper, we propose some syntactic constraints on STG to guarantee hazard-free implementation. We have introduced a global persistency concept in order to establish the relationship between the persistency concept introduced by Chu [2] (which we call local persistency) and the consistent state coding (CSC). The STG syntactic constraints required to compute the input set of a signal are identified. We analyze all hazards under both single and multiple input change conditions and propose necessary changes to the net contraction and logic synthesis procedures. The proposed changes are guaranteed to generate hazard-free circuits with the unbounded-gate delay model, if the STG is live, safe and has consistent state coding."

Download or read book On the Design of Diagnosable Asynchronous Sequential Machines written by William Wise Patterson and published by . This book was released on 1971 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Asynchronous state assignment methods are discussed and certain concepts based on these methods are defined. The discussion includes a review of the two race-free assignment methods developed by Huffman, and a detailed review of the USTT assignment method developed by Tracey. The concepts of transition cube, controlling variable, stationary variable and switching variable are defined. Asynchronous circuits realized with flip-flop or delay memories under USTT and race-free state assignments are examined to determine their vulnerability to critical races, hazards and oscillations under faults. Design rules are developed to make circuits invulnerable to most oscillations. It is shown that the vulnerability of virtually all circuits to critical races under faults cannot be removed without adding redundant state variables. Finally a fault tolerant circuit design is proposed. Using redundancy and a special type of logical realization, the fault behavior of the circuit is constrained such that the set of states which the circuit can take under faults is limited to a small number. A check circuit which will indicate the presence of a fault in the sequential circuit is included. This circuit consists of three gates and can be diagnosed for faults with two tests. (Author).

Download or read book Computer Aided Design of Digital Systems written by and published by . This book was released on 1960 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Index written by and published by . This book was released on 1973 with total page 956 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bibliography of Scientific and Industrial Reports written by and published by . This book was released on 1973 with total page 982 pages. Available in PDF, EPUB and Kindle. Book excerpt: