Design System for Next-Generation High-Performance Analog Integrated Circuits

本课题旨在建立一个在21世纪具有重要作用的混合信号lsi模拟电路设计系统。在工程中得到如下结果：(1)为了构建这样一个系统模拟，提出了低电源电压下的基本构建模块。该电路应用于△ΣAS模数转换器的合成为例。(2)开关电容电路是离散时间信号处理电路，也是重要的模拟模块，由于开关电容电路存在时钟馈通问题，提出了一种减小时钟馈通效应的方法。(3)为帮助模拟电路设计人员代替少量模拟电路设计人员自动设计模拟电路的算法。(4)提出了一种基片有源保护带电路来降低数字电路的噪声。研究优秀的模拟电路布局和上述所有结果的组合是未来的问题。

The aim of this project is to build up a design system for analog circuits in mixed-signal LSIs, which are expected to play an important role in 21st century. The following results are obtained in the project.(1) In order to build such a system analog basic building blocks under low-power supply voltages are proposed. The circuits are applied to a synthesis of a △ΣAS Analog-to-Digital converter as an example.(2) Switched-capacitor circuits are discrete-time signal processing ones and also important analog building blocks Since sitched-capacitor circuits have a clock feedthrough problem, a method to reduce the clock feedthrough effect is proposed.(3) To help analog circuit designs instead of a small number of analog circuit designers automatic analog circuit design algorithm is proposed.(4) To reduce noise from digital circuits via a substrate active gurad band circuit is proposed.Investigation for excellent analog circuit layouts and combination of all results obtained above are left as future problems.