一个1.8 mW 2 MHz信号带宽的连续时间σ - δ调制器

2009 International Conference on Environmental Science and Information Application Technology Pub Date : 2011-03-26 DOI:10.1109/ICIST.2011.5765241

Xiao-Fei Chen, J. Xu, Xuewei Zou, Shuang-Xi Lin

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引用次数: 0

摘要

提出了一种适用于兆赫无线通信的全差分反馈三阶连续时间σ - δ调制器。一些设计优化主要针对功耗进行了演示。所提出的单比特调制器时钟频率为128 MHz，信号带宽为2 MHz，分辨率为11位，信噪比为68 dB，动态范围为66 dB。该sigma-delta调制器采用0.18µm CMOS工艺设计，单电源电压为1.8 V，功耗为1.8 mW，芯片面积为0.16 mm2。

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A 1.8 mW 2 MHz signal bandwidth continuous-time sigma-delta modulator

A fully differential feedback third-order continuous-time sigma-delta modulator suitable for Mega Hertz wireless communication is presented. Some design optimizations mainly regarding power consumption are demonstrated. The proposed single-bit modulator clocked at 128 MHz achieves 2 MHz signal bandwidth, 11 bits of resolution, 68 dB signal-to-noise ratio and 66 dB dynamic range. Designed in 0.18 µm CMOS process, the sigma-delta modulator consumes 1.8 mW from a 1.8 V single supply, occupying a 0.16 mm2 chip area.

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2009 International Conference on Environmental Science and Information Application Technology

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