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Bidirectional closed-form transformation between on-chip coupling noise waveforms and interconnect delay-change curves

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5 Author(s)
T. Sato ; Hitachi Ltd., Tokyo, Japan ; Yu Cao ; K. Agarwal ; D. Sylvester
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A novel concept of bidirectional transformation between on-chip coupling noise waveform and delay-change curve (DCC) using closed-form equations is described in this paper. These equations are targeted for use in: 1) the efficient generation of DCCs and 2) accurate experimental determination of subnanosecond coupling noise. In particular, we explore the concept of using analytical models to efficiently generate DCCs that can then be used to characterize the impact of noise on any victim/aggressor configuration. The concept is model independent, although we investigate several common noise modeling choices and perform a sensitivity analysis to optimize the generation of DCCs. By extending existing noise models, arbitrary configurations can be considered including multiple aggressors in the timing-analysis framework. Simulation using the analytical approach closely matches time-consuming SPICE simulations, making noise-aware timing analysis using DCCs both efficient and accurate. A test chip using a 0.25-μm CMOS process was designed and its measurement results also show good agreement with SPICE simulations.

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IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems  (Volume:22 ,  Issue: 5 )