具有13+4位数字输出的0.1%精度100/spl Omega/-20M/spl Omega/动态范围集成气体传感器接口电路

Proceedings of the 31st European Solid-State Circuits Conference, 2005. ESSCIRC 2005. Pub Date : 2005-12-05 DOI:10.1109/ESSCIR.2005.1541632

M. Grassi, P. Malcovati, A. Baschirotto

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引用次数: 20

摘要

本文介绍了一种用于电阻式传感器的集成宽量程接口电路的设计和特性。该器件实际上是一个多尺度跨电阻连续时间放大器，后面跟着一个13位增量a /D转换器。如测量结果所示，在5.3年的范围内，最坏情况下的分辨率接近0.1% [100/spl Omega/-20M/spl Omega/]，这要归功于一种校准技术，该技术可以消除尺度之间的偏移和增益误差不匹配。该芯片采用0.35/spl μ m CMOS工艺设计。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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A 0.1% accuracy 100/spl Omega/-20M/spl Omega/ dynamic range integrated gas sensor interface circuit with 13+4 bit digital output

This paper presents the design and the characterization of an integrated wide-range interface circuit for resistive sensors. The device is actually a multi-scale transresistance continuous time amplifier followed by a 13-bit incremental A/D converter. As shown in measurements the worst case resolution is near to 0.1% over a range of 5.3 decades [100/spl Omega/-20M/spl Omega/] thanks to a calibration technique which cancels offset and gain error mismatch between scales. The chip has been designed in 0.35/spl mu/m CMOS technology.

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Proceedings of the 31st European Solid-State Circuits Conference, 2005. ESSCIRC 2005.

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