A Modified Charging Algorithm for Comparator-Based Switched-Capacitor Circuits

被引：3

作者：

Wong, Kim-Fai ^{[1
]}

Sin, Sai-Weng ^{[1
]}

U, Seng-Pan ^{[1
]}

Martins, R. P.

机构：

[1] Univ Macau, Fac Sci & Technol, Analog & Mixed Signal VLSI Lab, Taipa, Peoples R China

来源：

2009 52ND IEEE INTERNATIONAL MIDWEST SYMPOSIUM ON CIRCUITS AND SYSTEMS, VOLS 1 AND 2 | 2009年

关键词：

D O I：

10.1109/MWSCAS.2009.5236147

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

This paper presents a modified charging algorithm for fully-differential comparator-based switched-capacitor (CBSC) circuits by utilizing an additional comparator to compare a variable differential threshold rather than detecting the zero crossing during coarse (E-1) transfer phase. The large overshoot in the coarse phase can be eliminated such that it relaxes the stringent trade-off between speed and accuracy, which exists in the conventional CBSC circuits. A 1.2-V Sample-and-Hold circuit implemented in 90nm CMOS process is used to demonstrate the effectiveness of this concept.

引用

页码：86 / +

页数：2

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