Path delay analysis for hierarchical building block layout system

  • Authors:
  • Eiji Tamura;Kimihiro Ogawa;Toshio Nakano

  • Affiliations:
  • IC Design Dept., Semiconductor Gp., SONY Corporation, Asahicho, Atsugishi 243 Japan;IC Design Dept., Semiconductor Gp., SONY Corporation, Asahicho, Atsugishi 243 Japan;IC Design Dept., Semiconductor Gp., SONY Corporation, Asahicho, Atsugishi 243 Japan

  • Venue:
  • DAC '83 Proceedings of the 20th Design Automation Conference
  • Year:
  • 1983

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Abstract

This paper describes a path delay analysis system which employs an accurate signal delay calculation method for MOS LSIs, taking poly resistance into account. The system takes mask patterns generated by a hierarchical building block layout system as inputs, and verifies timing margins of a large scale random logic LSI in a module-wise bottom up fashion. Path delay analysis using a critical path trace algorithm and an enumerative path trace algorithm in combination is effective in locating critical timing regions in a chip and in analyzing critical paths in the regions in detail.