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VLSI asynchronous systems: specification and synthesis

Authors
Journal
Microprocessors and Microsystems
0141-9331
Publisher
Elsevier
Publication Date
Volume
16
Issue
10
Identifiers
DOI: 10.1016/0141-9331(92)90081-4
Keywords
  • Vlsi Design
  • Asynchronous Circuits
  • Formal Specification
  • High Level Synthesis
Disciplines
  • Design

Abstract

Abstract Most of today's digital systems are realized using synchronous (i.e. globally clocked) VLSI circuits. For many reasons, it is becoming increasingly hard to build large synchronous circuits. Although several techniques for building non-clocked (i.e. asynchronous) sequential circuits have been known for some time, they have been largely ignored by the digital design community. Recently, however, asynchronous circuits have been enjoying a revival. After reviewing recent research in this area, we take a simple collection of examples and, through them, explain our design system for specifying and synthesizing asynchronous circuits. We show that by being able to work in a framework where circuit activities do not have to coincide with clock pulses, designers obtain several avenues for circuit optimization that are highly promising for creating efficient and modularly expandable circuits.

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