Xu Jiawei, Hong Zhiliang
IEEE Rev Biomed Eng. 2022;15:23-35. doi: 10.1109/RBME.2020.3041053. Epub 2022 Jan 20.
Assessing blood flow, respiration patterns, and body composition with wearable and noninvasive bio-impedance (BioZ) sensors has distinctive advantages over the conventional clinical practice. The merits of BioZ sensors derive from having long-term monitoring capability and improved user friendliness. These open up the way to build medical grade wearable devices for chronic conditions. Low power, high precision BioZ sensor interface IC is the heart of such devices, it also determines the signal integrity of the overall system. Nevertheless, electrical design challenges from both circuit and system perspective still need to be addressed. This paper reviews the pioneering BioZ interface ICs and systems, and proposes major electrical specifications for wearable BioZ sensors. System design methodologies and circuit optimization techniques are summarized as guidelines to develop the next generation BioZ interface electronics.
使用可穿戴和无创生物阻抗（BioZ）传感器评估血流、呼吸模式和身体成分，相对于传统临床实践具有显著优势。BioZ传感器的优点源于其长期监测能力和更高的用户友好性。这些优势为构建用于慢性病的医疗级可穿戴设备开辟了道路。低功耗、高精度的BioZ传感器接口IC是此类设备的核心，它还决定了整个系统的信号完整性。然而，从电路和系统角度来看的电气设计挑战仍需解决。本文回顾了开创性的BioZ接口IC和系统，并提出了可穿戴BioZ传感器的主要电气规格。系统设计方法和电路优化技术被总结为开发下一代BioZ接口电子设备的指导方针。
