Clock-delayed domino for dynamic circuit design

  • Authors:
  • Gin Yee;Carl Sechen

  • Affiliations:
  • Sun Microsystems, Palo Alto, CA/ Univ. of Washington, Seattle;Univ. of Washington, Seattle

  • Venue:
  • IEEE Transactions on Very Large Scale Integration (VLSI) Systems
  • Year:
  • 2000

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Abstract

Clock-delayed (CD) domino is a self-timed dynamic logic family developed to provide single-rail gates with inverting or noninverting outputs. CD domino is a complete logic family and is as easy to design with as static CMOS circuits from a logic design and synthesis perspective. Design tools developed for static CMOS are used as part of a methodology for automating the design of CD domino circuits. The methodology and CD domino's characteristics are demonstrated in the design of a 32-b carry look-ahead adder. The adder was fabricated with MOSIS's 0.8-/spl mu/m CMOS process with scalable CMOS design rules that allow a 1.0-/spl mu/m drawn gate length. Measurements of the adder show a worst case addition of 2.1 ns. The CD domino adder is 1.6/spl times/ faster than a dual-rail domino adder designed with the same cell library and technology.