Regular Analog/RF Integrated Circuits Design Using Optimization With Recourse Including Ellipsoidal Uncertainty
Regular Analog/RF Integrated Circuits Design Using Optimization With Recourse Including Ellipsoidal Uncertainty
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DOI：
10.1109/tcad.2009.2013996
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发表时间：
2009-05
影响因子：
2.9
通讯作者：
Yang Xu;Kan-Lin Hsiung;Xin Li;L. Pileggi;Stephen P. Boyd
中科院分区：
文献类型：
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作者：
Yang Xu;Kan-Lin Hsiung;Xin Li;L. Pileggi;Stephen P. Boyd
由于无法预测硅的实际情况而导致的长设计周期是困扰模拟/射频集成电路产品开发的一个众所周知的问题。随着这个问题在纳米级集成电路技术中恶化，高设计成本和多个制造旋转导致更少的产品具有支持完全定制实现所需的体积。设计重用和模拟合成使模拟/RF设计更经济实惠；然而，不断增加的工艺可变性和建模精度的缺乏仍然是纳米级模拟/射频设计的极具挑战性。我们提出了一种常规的模拟/射频IC，采用金属掩模可配置性设计方法，包括布局提取（ORACLE）在内的模拟电路资源优化，通过将综合问题表述为资源优化问题，将重用和共享结合起来。ORACLE采用两阶段几何规划和追索权方法，同时解决全局最优共享变量和特定于应用程序的变量。此外，还提出了鲁棒优化方法来处理具有可变性的设计问题，通过为规则设计的每种配置提供良率界，进一步增强了ORACLE方法。工艺参数的统计变化由置信椭球体捕获。我们使用金属掩模可配置性演示ORACLE用于常规低噪声放大器设计，其中一系列应用共享共同的底层结构，并使用金属掩模层执行特定应用的定制。给出了两个射频振荡器设计实例，以实现具有保证良率界的稳健设计。
Long design cycles due to the inability to predict silicon realities are a well-known problem that plagues analog/RF integrated circuit product development. As this problem worsens for nanoscale IC technologies, the high cost of design and multiple manufacturing spins causes fewer products to have the volume required to support full-custom implementation. Design reuse and analog synthesis make analog/RF design more affordable; however, the increasing process variability and lack of modeling accuracy remain extremely challenging for nanoscale analog/RF design. We propose a regular analog/RF IC using metal-mask configurability design methodology Optimization with Recourse of Analog Circuits including Layout Extraction (ORACLE), which is a combination of reuse and shared-use by formulating the synthesis problem as an optimization with recourse problem. Using a two-stage geometric programming with recourse approach, ORACLE solves for both the globally optimal shared and application-specific variables. Furthermore, robust optimization is proposed to treat the design with variability problem, further enhancing the ORACLE methodology by providing yield bound for each configuration of regular designs. The statistical variations of the process parameters are captured by a confidence ellipsoid. We demonstrate ORACLE for regular Low Noise Amplifier designs using metal-mask configurability, where a range of applications share common underlying structure and application-specific customization is performed using the metal-mask layers. Two RF oscillator design examples are shown to achieve robust designs with guaranteed yield bound.