A Switched-Capacitor, Integrator-Multiplexing, Second-Order Delta-Sigma Modulator Featuring a Single Differential Difference Amplifier for Portable EEG Application

被引：1

作者：

Duan, Quanzhen ^{[1
]}

Kong, Dameng ^{[2
]}

Lin, Chenxi ^{[2
]}

Huang, Shengming ^{[2
]}

Meng, Zhen ^{[3
]}

Ding, Yuemin ^{[4
]}

机构：

[1] Sun Yat Sen Univ, Sch Integrated Circuits, Shenzhen, Peoples R China

[2] Tianjin Univ Technol, Sch Integrated Circuit Sci & Engn, Tianjin, Peoples R China

[3] Chinese Acad Sci, Inst Microelect, Beijing, Peoples R China

[4] Univ Navarra, Dept Elect & Elect Engn, San Sebastian, Spain

来源：

JOURNAL OF CIRCUITS SYSTEMS AND COMPUTERS | 2023年 / 32卷 / 09期

基金：

中国国家自然科学基金;

关键词：

Delta-sigma modulator; differential difference amplifier; multiplexing; EEG applications;

D O I：

10.1142/S0218126623501554

中图分类号：

TP3 [计算技术、计算机技术];

学科分类号：

0812 ;

摘要：

We present a novel switched-capacitor, integrator-multiplexing, second-order delta-sigma modulator (DSM) featuring a single differential difference amplifier (DDA). Power consumption is low and resolution is high when this DSM is used for portable electroencephalographic applications. A single DDA (rather than a conventional operational transconductance amplifier) with appropriate switch and capacitor architectures is used to create the second-order switched-capacitor DSM. The configuration ensures that the resolution is high. The modulator was implemented using a standard 180nm complementary metal-oxide-silicon process. At a supply voltage of 1.8V, a signal bandwidth of 250Hz and a sampling frequency of 200kHz, simulations demonstrated that the modulator achieved an 82dB peak signal-to-noise-distortion ratio and an effective number of bits of 14.

引用

页数：10