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Optimal VLSI Delay Tuning by Wire Shielding

Author

Listed:
  • Binyamin Frankel

    (Bar-Ilan University)

  • Shmuel Wimer

    (Bar-Ilan University)

Abstract

Interconnect shielding is used in VLSI designs to avoid noise interference from the cross-coupling capacitance between adjacent signals. This paper takes advantage of the shields already present in the design and uses them to tune the propagation delay of the clock signals, thus eliminating expensive dedicated delay buffers. The problem of obtaining the desired delay at a minimum shielding cost (silicon area) is formulated as a calculus of variations problem. An analytical solution shows that a square root shield profile is optimal.

Suggested Citation

  • Binyamin Frankel & Shmuel Wimer, 2016. "Optimal VLSI Delay Tuning by Wire Shielding," Journal of Optimization Theory and Applications, Springer, vol. 170(3), pages 1060-1067, September.
    • Handle: RePEc:spr:joptap:v:170:y:2016:i:3:d:10.1007_s10957-016-0960-8
    DOI: 10.1007/s10957-016-0960-8
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