集成电路与嵌入式系统2024，Vol.24Issue(12)：1-11,11.DOI:10.20193/j.ices2097-4191.2024.0056
数据转换器中电容失配的分析与解决方案
An analysis for capacitor mismatches in data converters and its solution
杨翼好 1刘国骜 2于健睿 2马金戈 2胡远奇2
作者信息
- 1. 北京自动化控制设备研究所,北京 100074
- 2. 北京航空航天大学集成电路科学与工程学院,北京 100191
- 折叠
摘要
Abstract
The inherent capacitor mismatch resulting from process variations is a significant impediment in the designing of high-resolu-tion Analog-to-Digital Converters.Various calibration methods have been previously introduced,often employing additional circuits or external controllers,albeit at the expense of increased silicon area or intricate operational complexities.In this work,we have estab-lished the relationship between capacitor mismatches,output deviation,and Total Harmonic Distortion(THD)in capacitor Digital-to-Analog Converters.Consequently,the statistical distribution of expected THD under certain mismatch can be derived.After that,we propose a new compensation strategy that adopts the Dynamic Element Matching(DEM)technique to conventional cyclic ADCs with minimum hardware cost and implement this compensation scheme in a cyclic-pipelined ADC.We reassess the performance of the pro-posed ADC based on the formulated theory.Importantly,the measurement results of the cyclic ADC have not only confirmed the validity of our proposed theory but also demonstrated the robust performance of the simplified version of the DEM algorithm.This work is con-structive for performance estimation in other high-precision ADC designs.关键词
ADC校准/DEM/失配补偿/校准算法/ADC设计Key words
ADC calibration/DEM/mismatch compensation/calibration algorithm/ADC design分类
信息技术与安全科学引用本文复制引用
杨翼好,刘国骜,于健睿,马金戈,胡远奇..数据转换器中电容失配的分析与解决方案[J].集成电路与嵌入式系统,2024,24(12):1-11,11.
