A 0.6V 785-nW Multimodal Sensor Interface IC for Ozone Pollutant Sensing and Correlated Cardiovascular Disease Monitoring
A 0.6V 785-nW Multimodal Sensor Interface IC for Ozone Pollutant Sensing and Correlated Cardiovascular Disease Monitoring
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用于臭氧污染物传感和相关心血管疾病监测的 0.6V 785nW 多模式传感器接口 IC
DOI：
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发表时间：
2021
影响因子：
5.4
通讯作者：
B. Calhoun
中科院分区：
文献类型：
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作者：
Rishika Agarwala;Peng Wang;Henry L. Bishop;Anjana Dissanayake;B. Calhoun
在这篇文章中，我们提出了一个785 nW的多模式传感器接口IC的设计和分析臭氧污染物传感和相关的心血管疾病监测的基础上心电图（ECG）和光电容积描记（PPG）。所提出的混合直流偏置电流消除（DCOC）沿着4-DC<inline-formula><tex-math notation="LaTeX"></tex-math></inline-formula><inline-formula><tex-math notation="LaTeX"> ext {M} Omega $增益调节共源共栅跨导放大器（RGC-TIA）可将PPG读出功率降低37美元</tex-math></inline-formula><inline-formula><tex-math notation="LaTeX"> 倍，与最先进的PPG传感器接口相比。</tex-math></inline-formula>臭氧感测通道提出了一种自适应架构，以实现低$V_{<inline-formula><tex-math notation="LaTeX"> ext {DD}}$操作，实现$300</tex-math></inline-formula><inline-formula><tex-math notation="LaTeX"> 与现有技术的气体传感读出器相比，功耗降低了1倍。</tex-math></inline-formula>臭氧传感通道的性能也使用定制的电阻金属氧化物传感器进行了验证，浓度从50到900 ppb。传感器接口IC采用65 nm CMOS制造，集成了165 nW电压模式ECG通道、532 nW电流模式PPG通道、76 nW连续模式臭氧通道和12.6 nW外围电路，所有这些都在0.6 V下工作。包括LED和定制数字读出IC在内的总系统功耗为10.98 - 15.51 μ m<inline-formula><tex-math notation="LaTeX"> ext {W}$，即41美元</tex-math></inline-formula><inline-formula><tex-math notation="LaTeX"> imes $-$57</tex-math></inline-formula><inline-formula><tex-math notation="LaTeX"> 比现有技术的臭氧/CVD联合监测传感器接口系统小10倍。</tex-math></inline-formula>
In this article, we present the design and analysis of a 785-nW multimodal sensor interface IC for ozone pollutant sensing and correlated cardiovascular disease monitoring based on electrocardiography (ECG) and photoplethysmography (PPG). The proposed hybrid <inline-formula> <tex-math notation="LaTeX">$dc$ </tex-math></inline-formula> offset current cancellation (DCOC) along with a 4-<inline-formula> <tex-math notation="LaTeX">$ ext{M}Omega $ </tex-math></inline-formula> gain-regulated cascode transimpedance amplifier (RGC-TIA) enable PPG readout power reduction by <inline-formula> <tex-math notation="LaTeX">$37 imes $ </tex-math></inline-formula>, compared with the state-of-the-art PPG sensor interfaces. The ozone sensing channel proposes an adaptive architecture to enable low <inline-formula> <tex-math notation="LaTeX">$V_{ ext {DD}}$ </tex-math></inline-formula> operation, achieving a <inline-formula> <tex-math notation="LaTeX">$300 imes $ </tex-math></inline-formula> power reduction, compared with the state-of-the-art gas sensing readouts. The ozone sensing channel’s performance was also verified using custom resistive metal-oxide sensors for concentrations from 50 to 900 ppb. The sensor interface IC is fabricated in a 65-nm CMOS, integrating a 165-nW voltage-mode ECG channel, a 532-nW current-mode PPG channel, 76-nW resistive-mode ozone channel, and 12.6-nW peripheral circuits, all at 0.6 V. The total system power consumption including the LED and a custom digital readout IC is 10.98–<inline-formula> <tex-math notation="LaTeX">$15.51~mu ext{W}$ </tex-math></inline-formula>, which is <inline-formula> <tex-math notation="LaTeX">$41 imes $ </tex-math></inline-formula>–<inline-formula> <tex-math notation="LaTeX">$57 imes $ </tex-math></inline-formula> less than prior ozone/CVD joint monitoring sensor interface systems.