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Low-voltage low-power integrated analog lock-in amplifier for gas sensor applications

机译：用于气体传感器应用的低压低功率集成模拟锁定放大器

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摘要

We propose a low-voltage (±1 V) low-power (3 mW) lock-in amplifier, fabricated in a standard CMOS technology (AMS 0.35 μm) with analog features and utilized for low-frequency gas sensor applications. The proposed lock-in architecture, which works at a fixed input signal frequency (77 Hz) with a very low input noise (only 34 nV/(sqrt(Hz)) @ 77 Hz), can be utilized to detect very small quantities of reagent gas, especially if combined with other techniques, as the sensor thermal modulation. The integrated solution has been fabricated on a single chip, requiring a reduced silicon area (about 5 mm~2). Experimental measurements have confirmed the capability of the proposed lock-in system to reveal very small signals, in particular, testing the whole system for gas detection, a resolution improvement by a factor valued about 50 allows to detect gas concentrations lower than 1 ppm.
机译：我们提出了一种低压（±1 V）低功耗（3 mW）锁定放大器，该放大器采用具有模拟功能的标准CMOS技术（AMS 0.35μm）制造，并用于低频气体传感器应用。所建议的锁定架构可在固定输入信号频率（77 Hz）且输入噪声非常低（77 Hz时仅为34 nV /（sqrt（Hz））的情况下工作），可用于检测极少量的噪声。反应气，特别是与其他技术结合使用时，作为传感器的热调节。该集成解决方案已在单个芯片上制造，需要减小的硅面积（约5 mm〜2）。实验测量结果证实了所提出的锁定系统能够显示很小的信号，特别是对整个系统进行气体检测测试，分辨率提高了大约50倍，可以检测到浓度低于1 ppm的气体。

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  • 来源
    《Sensors and Actuators》 |2010年第2期|400-406|共7页
  • 作者

    A. DAmico; A. De Marcellis; C. Di Carlo; C. Di Natale; G. Ferri; E. Martinelli; R. Paolesse; V. Stornelli;

  • 作者单位

    Department of Electronic Engineering, University of Tor Vergata, Roma, Italy;

    Department of Electrical and Information Engineering, University of L'Aquila, L'Aquila, Italy;

    Department of Electrical and Information Engineering, University of L'Aquila, L'Aquila, Italy;

    Department of Electronic Engineering, University of Tor Vergata, Roma, Italy;

    Department of Electrical and Information Engineering, University of L'Aquila, L'Aquila, Italy;

    Department of Electronic Engineering, University of Tor Vergata, Roma, Italy;

    Department of Chemical Science and Technology, University of Tor Vergata, Roma, Italy;

    Department of Electrical and Information Engineering, University of L'Aquila, L'Aquila, Italy;

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  • 正文语种 eng
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  • 关键词

    analog lock-in amplifier; low-voltage low-power integrated sensor; system; thermal modulated resistive sensor;

    机译：模拟锁相放大器低压低功率集成传感器;系统;热调制电阻传感器;

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