Power supply noise reduction for at-speed scan testing in linear-decompression environment

  • Authors:
  • Meng-Fan Wu;Jiun-Lang Huang;Xiaoqing Wen;Kohei Miyase

  • Affiliations:
  • Department of Electrical Engineering and the Graduate Institute of Electronics Engineering, National Taiwan University, Taipei, Taiwan;Department of Electrical Engineering and the Graduate Institute of Electronics Engineering, National Taiwan University, Taipei, Taiwan;Department of Computer Science and Electronics, Kyushu Institute of Technology, Iizuka, Japan;Department of Computer Science and Electronics, Kyushu Institute of Technology, Iizuka, Japan

  • Venue:
  • IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems
  • Year:
  • 2009

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Abstract

Yield loss caused by excessive power supply noise has become a serious problem in at-speed scan testing. Although X-filling techniques are available to reduce the launch cycle switching activity, their performance may not be satisfactory in the linear-decompressor-based test compression environment. This paper solves this problem by proposing a novel integrated automatic test pattern generation scheme that efficiently and effectively performs compressible low-capture-power X-filling. Related theoretical principles are established, based on which the problem size is substantially reduced. The proposed scheme is validated by benchmark circuits, as well as an industry design in the embedded deterministic test environment.