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Minimum-Area Shield Insertion for Explicit Inductive Noise Reduction

Mohamed A. ElgamelMagdy A. Bayoumi

With high clock frequencies, faster transistor rise/fall time, long signal wires, and the use of wider wires and Cu material interconnects, the interconnect inductance, and the noise generated because of this inductance, is becoming an important design metric in digital circuits. For a risk-free layout solution of a chip, capacitive and inductive noises should be considered at various routing process stages. A formulation and efficient solution for the min-area shield insertion problem to satisfy given explicit noise bounds in multiple coupled nets is provided. The noise model used can handle different wire widths, different spacing among wires, and different wire lengths. The model also is aware of the skin effect in high frequency ranges. Experimental results show that the proposed approach gives minimum number of shields to satisfy the noise constraints and uses less runtime than the best alternative approach.

http://ieeexplore.ieee.org/iel5/8726/27627/01232838.pdf?tp=&arnumber=1232838&isnumber=27627

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