一个1.5 V低功耗三阶连续低通/spl Sigma//spl Delta/ A/D转换器

ISLPED'00: Proceedings of the 2000 International Symposium on Low Power Electronics and Design (Cat. No.00TH8514) Pub Date : 2000-07-26 DOI:10.1109/LPE.2000.155283

F. Gerfers, Y. Manoli

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引用次数: 2

摘要

本文介绍了一种采用连续时间(CT)环滤波器的三阶低通/spl Sigma//spl Delta/模数(a/ D)转换器的设计。环路滤波器采用有源rc积分器实现。讨论了低电源电压对放大器和共模反馈等组成部分以及对整体/spl Sigma//spl Delta/调制器的影响。仿真结果表明，1.5 V CT /spl Sigma//spl Delta/ A/D转换器在25 kHz带宽下的动态范围为75 dB。期望功耗低于300 /spl mu/W。

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A 1.5 V low-power third order continuous-time lowpass /spl Sigma//spl Delta/ A/D converter

This paper presents the design of a 3rd-order lowpass /spl Sigma//spl Delta/ analog-to-digital (A/D) converter using a continuous-time (CT) loopfilter. The loopfilter has been implemented by using active RC-integrators. The influence of the low supply voltage on the building blocks such as the amplifier and the common mode feedback as well as on the overall /spl Sigma//spl Delta/ modulator is discussed. Simulation results of the 1.5 V CT /spl Sigma//spl Delta/ A/D converter show a 75 dB dynamic range in a bandwidth of 25 kHz. The expected power consumption is less than 300 /spl mu/W.

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ISLPED'00: Proceedings of the 2000 International Symposium on Low Power Electronics and Design (Cat. No.00TH8514)

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