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A novel yield aware multi-objective analog circuit optimization tool

机译:一种新颖的良率感知多目标模拟电路优化工具

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摘要

This paper proposes a novel multi-objective yield aware analog sizing tool that utilizes scrambled Quasi Monte Carlo (QMC) approach for efficient yield estimation and Strength Pareto Evolutionary Algorithm-2 (SPEA2) as a search engine. Analog circuit sizing tools have been utilized for the last two decades to overcome challenging trade-offs in analog circuit design. However, due to the variation phenomenon, some solutions at the Pareto front (PF) move towards the suboptimal region. To overcome this issue, yield aware optimization tools, where yield is given as a new design objective, have been proposed in the last decade. Conventionally, Monte Carlo (MC) approach has been used for the yield estimation. However, large sized MC analysis is a highly inefficient and time consuming process because of the numerous simulations performed during the optimization process. Rather than conventional MC, using QMC, which utilizes Low Discrepancy Sequences (LDS), enhances the synthesis time since, it promises low estimation errors with fewer number of simulations. Thanks to the QMC based variability analysis and multi-objective search engine, a yield aware PF that allows the designer to access all robust solutions can be obtained within an acceptable synthesis time.
机译:本文提出了一种新颖的多目标收益感知模拟大小调整工具,该工具利用加扰的准蒙特卡洛(QMC)方法进行有效收益估算,并使用强度帕累托进化算法2(SPEA2)作为搜索引擎。在过去的二十年中,已经使用模拟电路尺寸调整工具来克服模拟电路设计中的挑战性折衷。但是,由于变异现象,在帕累托前沿(PF)的某些解决方案向次优区域移动。为了克服这个问题,在过去十年中已经提出了良率感知优化工具,将良率作为新的设计目标。按照惯例,蒙特卡罗(MC)方法已用于产量估算。但是,由于在优化过程中执行了大量模拟,因此大型MC分析是一个非常低效且耗时的过程。使用QMC而不是传统的MC,因为它利用了低差异序列(LDS)缩短了合成时间,因为它保证了较少的仿真次数,从而降低了估计误差。多亏了基于QMC的可变性分析和多目标搜索引擎,可以在可接受的合成时间内获得允许设计师使用所有稳健解决方案的良率感知PF。

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