⚡ 本页包含 AI 生成的分析内容，仅供参考
本文提出了一种基于ΔΣ调制的生物阻抗读出IC，可在0.6V/0.9V低电压下工作，功耗仅为26.6至119.3µW，实现了101.9dB的信噪比和低于0.1Hz的1/f噪声拐角，解决了可穿戴设备中低功耗、高精度生物阻抗测量的难题。
National University of Singapore, Singapore 1 2 *Equally-Credited Authors (ECAs) Bio-impedance (BioZ) is an important physiological parameter in wearable healthcare sensing. Besides the inherent cardiac and respiratory information, BioZ can be also used for other emerging applications such as non-invasive blood status sensing [1]. A conventional 4-electrode (4E) setup eliminates the effect of electrode-tissue impedance (ETI) at the expense of user comfort, system complexity, and cost. On the other hand, a 2-electrode (2E) setup avoids short-falls of 4E but can only capture relative changes of BioZ instead of its absolute value. In addition, a readout front-end (RFE) with wide dynamic range (DR) and high signal-to-noise ratio (SNR) is needed to deal with small BioZ variation (0.1~10Ω) as well as large baseline resistance (>10kΩ). A conventional RFE architecture employing an instrumentation amplifier (IA) and ADC has to trade-off
Tantan Zhang*1, Hyunwoo Son*1, Yuan Gao1, Jingjing Lan1, Chun-Huat Heng2
Institute of Microelectronics, A*STAR, Singapore