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Carbon Nanotube (CNT) based interconnect has become the most promising replacement for Cu based interconnect in future VLSI technology in the nanometer regime. In this work, we compare the performance of copper (Cu) and CNT based interconnect for four ITRS technology nodes. We also analyze the timing delay in CNT based interconnect under different process, temperature, and voltage (PTV) corners for...
Retiming is one of the most powerful sequential transformations that relocates flip-flops in a circuit without changing its functionality. The min-period retiming problem seeks a solution with the minimal clock period. Since most min-period retiming algorithms assume a simple constant delay model that does not take into account many prominent electrical effects in ultra deep sub micron vlsi designs,...
Logic cell modeling is an important component in the analysis and design of CMOS integrated circuits, mostly due to nonlinear behavior of CMOS cells with respect to the voltage signal at their input and output pins. A current-based model for CMOS logic cells is presented which can be used for effective crosstalk noise and delta delay analysis in CMOS VLSI circuits. Existing current source models are...
With continued scaling of technology into nanometer regimes, the impact of coupling induced delay variations is significant. While several coupling-aware static timers have been proposed, the results are often pessimistic with many false failures. We present an integrated iterative timing filtering and logic filtering based approach to reduce pessimism. We use a realistic coupling model based on arrival...
In this paper, we formulate the generalized convex sizing (GCS) problem that unifies and generalizes the sizing problems. We revisit the approach to solve the sizing problem by Lagrangian relaxation, point out several misunderstandings in the previous works, and extend the approach to handle general convex delay functions in the GCS problems. We identify a class of proper GCS problems whose objective...
This paper presents a framework for fast and accurate static timing analysis considering coupling. With technology scaling to smaller dimensions, the impact of coupling induced delay variations can no longer be ignored. Timing analysis considering coupling is iterative, and can have considerably larger run-times than a single pass approach. We propose a novel and accurate coupling delay model, and...
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