Analysis on Capacitor Mismatch and Parasitic Capacitors Effect of Improved Segmented-Capacitor Array in SAR ADC

被引：7
作者：
Lei, Sun [1 ]
Dai Qinyuan [1 ]
Qiao Gaoshuai [1 ]
Lee Chuangchuan [2 ]
机构：
[1] Shanghai Jiao Tong Univ, Thin Film & Micro Fabricat Technol, Minist Educ, Natl Key Lab Nano Micro Fabricat Technol, Shanghai 200030, Peoples R China
[2] Shanghai Jiao Tong Univ, Sch Microelect, Shanghai 200030, Peoples R China
来源：
2009 THIRD INTERNATIONAL SYMPOSIUM ON INTELLIGENT INFORMATION TECHNOLOGY APPLICATION, VOL 2, PROCEEDINGS | 2009年
关键词：
Successive Approximation Register (SAR) ADC; System-on-chip(SOC); Charge Redistribution; Capacitor Segmentation;
D O I：
10.1109/IITA.2009.193
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 an analysis on capacitor mismatch and parasitic capacitors effect of the improved segmented-capacitor array to alleviate the limitation of mismatching performance and avoid a non-binary-weighted coupling capacitor. Both the matching of binary-weighted capacitor network and parasitic capacitors on both sides of the coupling capacitor have great influence on the resolution of ADC system. The relationship among the mismatching of binary-weighted-capacitor network and the parasitic capacitors and the attainable resolution of ADC is analyzed by giving precise theoretical demonstration. Therefore, a theoretical basis is provided for designers to choose process, layout, circuit structure, and capacitor size in their design of SAR ADC.
引用
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页码：280 / +
页数：3
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