一种133.3 dB动态范围脉搏血氧仪前端，具有低噪声区域高效失调抵消电流DAC

2023 International Conference on Electronics, Information, and Communication (ICEIC) Pub Date : 2023-02-05 DOI:10.1109/ICEIC57457.2023.10049972

Soungchul Park, Wooyoung Kim, Suhwan Kim, Jooyeol Rhee

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引用次数: 0

摘要

本文介绍了一种采用低噪声区域高效失调抵消电流数模转换器(DAC)的脉搏血氧仪前端。提出的失调抵消电流DAC是为了抵消输入直流电流以提高有效动态范围(DR)。采用动态元件匹配技术和减少空闲电流镜像晶体管的数量，设计出低噪声和面积效率高的电流DAC。它可以产生高达256 μA的电流。由于当前DAC的偏移抵消，所提出的脉搏血氧仪的信噪比为77.4 dB，有效DR为133.3 dB。脉搏血氧仪前端采用0.13 μm CMOS，功耗为307.1 μW，电源为1.65 V。品质因数为0.81 pJ/样品。

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 133.3 dB Dynamic Range Pulse Oximeter Front-End with Low-Noise Area-Efficient Offset Cancellation Current DAC

This paper introduces a pulse oximeter front-end with low-noise area-efficient offset cancellation current digital-to-analog converter (DAC). The proposed offset cancellation current DAC is implemented to cancel the input DC current to improve the effective dynamic range (DR). The current DAC is designed to have low-noise and area-efficient characteristics by applying the dynamic element matching technique and reducing the number of idle current mirror transistors. It can generate a current of up to 256 μA. Due to the offset cancellation of the current DAC, the proposed pulse oximeter has a signal-to-noise ratio of 77.4 dB and an effective DR of 133.3 dB. The pulse oximeter front-end is designed in 0.13 μm CMOS and consumes 307.1 μW from a 1.65 V supply. The figure-of-merit is 0.81 pJ/Sample.

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2023 International Conference on Electronics, Information, and Communication (ICEIC)

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