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

本项目的目标是建立一个混合信号LSI中模拟电路的设计系统，该系统有望在21世纪发挥重要作用。本课题取得了以下成果：(1)为了构建这样的系统，提出了低电源电压下的模拟基本积木。(2)开关电容电路是离散时间信号处理电路，也是重要的模拟构件，由于静止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)为了帮助模拟电路设计而不是少数模拟电路设计者，提出了自动模拟电路设计算法。(4)提出了通过衬底有源Gurad带电路来降低数字电路的噪声。对优秀的模拟电路布局的研究和以上结果的综合将作为未来的问题。

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.