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
收藏
页码：86 / +
页数：2
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