A 1.1V 12 μW 86 dB DR Sigma-Delta Modulator for Health Monitoring System

被引：2

作者：

Zhao, Long ^{[1
]}

Deng, Chenxi

Wang, Guan

Chen, Hongming

Cheng, Yuhua

机构：

[1] Peking Univ, Shanghai Res Inst Microelect, 608 Shengxia Rd, Shanghai 201203, Peoples R China

来源：

JOURNAL OF CIRCUITS SYSTEMS AND COMPUTERS | 2016年 / 25卷 / 06期

基金：

国家高技术研究发展计划(863计划);

关键词：

Sigma-Delta modulator; switched-capacitor circuits; low power; low voltage; health monitoring system; LOW-VOLTAGE; CMOS; ADC;

D O I：

10.1142/S0218126616500596

中图分类号：

TP3 [计算技术、计算机技术];

学科分类号：

0812 ;

摘要：

A low-voltage low-power Sigma-Delta modulator for health monitoring system is designed using a standard 0.18 mu m CMOS technology. To achieve high accuracy with low power consumption in low supply voltage environment, the designed modulator is implemented with a one-bit third-order topology, in which the input-feedforward structure and switched-opamp (SO) technique are combined. Using the proposed design method, the SO meets the system requirements with the minimal power consumption and good stability in a feedback loop. The modulator achieves 86 dB dynamic range (DR) over a 300 Hz bandwidth with an oversampling ratio (OSR) of 128, while it occupies 0.16 mm(2) and consumes 12 mu W under a 1.1V supply.

引用

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