Test cost reduction for multiple-voltage designs with bridge defects through gate-sizing

  • Authors:
  • Saqib Khursheed;Bashir M. Al-Hashimi;Peter Harrod

  • Affiliations:
  • University of Southampton, UK;University of Southampton, UK;ARM Limited, Cambridge, UK

  • Venue:
  • Proceedings of the Conference on Design, Automation and Test in Europe
  • Year:
  • 2009

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Abstract

Multiple-voltage is an effective dynamic power reduction design technique. Recent research has shown that testing for resistive bridging faults in such designs requires more than one voltage setting for 100% defect coverage; however switching between several supply voltage settings has a detrimental impact on the overall cost of test. This paper proposes an effective Gate Sizing technique for reducing test cost of multi-Vdd designs with bridge defects. Using synthesized ISCAS benchmarks and a parametric fault model, experimental results show that for all the circuits, the proposed technique achieves 100% defect coverage at a single Vdd setting; in addition it has a lower overhead than the recently proposed Test Point Insertion technique in terms of timing, area and power.