A Self-Adaptive Digital Calibration Technique for Multi-Channel High Resolution Capacitive SAR ADCs

被引：0

作者：

Lyu, Binbin ^{[1
,2
]}

Lu, Wengao ^{[1
,2
]}

Yang, Sijia ^{[1
,2
]}

Chen, Zhongjian ^{[1
,2
]}

Zhang, Yacong ^{[1
,2
]}

机构：

[1] Peking Univ, Inst Microelect, Key Lab Microelect Devices & Circuits, Beijing 100871, Peoples R China

[2] Peking Univ, Informat Technol Inst, Tianjin Binhai, Tianjin 300452, Peoples R China

来源：

2017 IEEE 12TH INTERNATIONAL CONFERENCE ON ASIC (ASICON) | 2017年

关键词：

SAR ADC; multi-channel; digital calibration;

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper introduces a self-adaptive digital technique to calibrate multi-channel SAR ADCs. Rather than achieving higher resolution by adjusting the analog component values, this new digital method infers the capacitor weights of a SAR ADC with the help of a channel-shared high resolution sigma-delta ADC, which results in remarkable improvements in the capacitive SAR ADCs' property. ENOB increases from 11.06 bits to 12.67 bits. The digital calibration logic is based on LMS (least mean squares) and gradient descent.

引用

页码：730 / 733

页数：4

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