A 1-V 60-μW 85-dB dynamic range continuous-time third-order sigma-delta modulator

被引：5

作者：

李渊文 ^{[1
]}

齐达 ^{[1
]}

董一枫 ^{[1
]}

许俊 ^{[1
]}

任俊彦 ^{[1
,2
]}

机构：

[1] State Key Laboratory of ASIC & System

[2] Micro-Nanoelectronics Science and Technology Innovation Platform,Fudan University

来源：

半导体学报 | 2009年 / 30卷 / 12期

基金：

国家高技术研究发展计划(863计划);

关键词：

analog-to-digital converter; continuous-time filter; low-power; low-voltage; sigma–delta modulation;

D O I：

暂无

中图分类号：

TN761 [调制技术与调制器];

学科分类号：

摘要：

A 1-V third order one-bit continuous-time (CT) Σ△ modulator is presented.Designed in the SMIC mixedsignal 0.13-μm CMOS process,the modulator utilizes active RC integrators to implement the loop filter.An efficient circuit design methodology for the CT Σ? modulator is proposed and verified.Low power dissipation is achieved through the use of two-stage class A/AB amplifiers.The presented modulator achieves 81.4-dB SNDR and 85-dB dynamic range in a 20-kHz bandwidth with an over sampling ratio of 128.The total power consumption of the modulator is only 60 μW from a 1-V power supply and the prototype occupies an active area of 0.12 mm 2.

引用

页码：118 / 122

页数：5

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