Switch level optimization of digital CMOS gate networks

  • Authors:
  • Leomar S. da Rosa;Felipe R. Schneider;Renato P. Ribas;Andre I. Reis

  • Affiliations:
  • Departamento de Informática - UFPel, Pelotas, RS, Brazil;Nangate Inc., Menlo Park, CA, USA;Instituto de Informática - UFRGS, Porto Alegre, RS, Brazil;Nangate Inc., Menlo Park, CA, USA

  • Venue:
  • ISQED '09 Proceedings of the 2009 10th International Symposium on Quality of Electronic Design
  • Year:
  • 2009

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Abstract

This paper presents a comprehensive investigation of how transistor level optimizations can be used to increase design quality of CMOS logic gate networks. Different properties of transistor networks are used to explain features and limitations of different methods. We describe which figures of merit, including the logical effort, affect the design quality of cell transistor networks. Further, we compare six different approaches that generate transistor networks, including two with guaranteed theoretical minimum length transistor chains. This comparison shows that minimum length chains reduce the logical effort of the networks.