A low-power and low-complexity continuous-time Gm-C based Delta-Sigma modulator for WCDMA/UMTS

被引：6
|
作者：
Webb, Matthew [1 ]
Tang, Hua [1 ]
机构：
[1] Univ Minnesota, Dept Elect & Comp Engn, Duluth, MN 55812 USA
来源：
INTERNATIONAL JOURNAL OF ELECTRONICS | 2009年 / 96卷 / 06期
关键词：
Delta-Sigma modulator; low-power; low-complexity; Gm-C; continuous-time; WCDMA; UMTS; SWITCHED-CAPACITOR; DYNAMIC-RANGE; CMOS; DESIGN; ADC; BANDWIDTH; MISMATCH; 14-BIT;
D O I：
10.1080/00207210902738109
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 article describes the implementation of a continuous-time Delta-Sigma modulator for WCDMA/UMTS in wireless communication. The Delta-Sigma modulator employs a Gm-C based integrator to form a fourth-order noise-shaping loop. The modulator samples at 160MHz and has an over-sampling ratio of 40 in 2MHz bandwidth. To reduce power consumption and design complexity, single-bit quantisation is employed. The modulator is implemented in 0.25m 1-ploy 5-metal CMOS technology and has an area of 0.13mm2. The modulator can achieve 70.7dB of signal-to-noise-plus-distortion-ratio and 74dB of dynamic range. Finally, the modulator consumes 3.5mW of power with a reduced power supply of 1.8V.
引用
收藏
页码：585 / 602
页数：18
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