Designing Carry Look-Ahead Adders with an Adiabatic Logic Standard-Cell Library

  • Authors:
  • Antonio Blotti;Maurizio Castellucci;Roberto Saletti

  • Affiliations:
  • -;-;-

  • Venue:
  • PATMOS '02 Proceedings of the 12th International Workshop on Integrated Circuit Design. Power and Timing Modeling, Optimization and Simulation
  • Year:
  • 2002

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Abstract

Adiabatic circuits are usually designed with methodologies optimized for the application in which they are used. In this work we show how a conventional design-flow based on an adiabatic standard-cell library and semi-automatic tools allow the quick and easy design and verification of a complex adiabatic system, without loosing the energy reduction benefits. The methodology has been applied to the design of positive feedback adiabatic logic (PFAL) carry look-ahead adders (CLA). Post-layout simulations of the standard-cell PFAL CLAs show a 94% energy recovery as compared to a conventional static CMOS CLA at 10 MHz, and 86% at 100 MHz. The standard-cell PFAL CLAs are also more energy efficient or comparable than other custom adiabatic CLAs found in the literature.