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A 20.1-μW 1.8 -GHz Near-Field Dielectric Plethysmography (NF-DPG) Heart-Rate Sensor with Time-based Edge Sampling

机译:具有基于时间的边缘采样的20.1μW1.8 GHz GHz近场电心动描记法(NF-DPG)心率传感器

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This paper presents a near-field dielectric plethysmography (NF-DPG) heart-rate sensor for low-power operation. By interrogating the contracting and expanding blood vessels with GHz-frequency fringing electric fields from the on-board coplanar electrodes, pulsing heart-rate signals are detected through changing permittivity at the fingertips. The sensor employs large-signal time-based edge sampling and double-integration chopper stabilization technique to maximize the sensitivity and to minimize the flicker noise. Implemented in 0.18-μm CMOS technology, the NF-DPG heart-rate sensor consumes 20.1 μW at a 100-Hz sampling rate while achieving an RMS inaccuracy of 1.64 bpm.
机译:本文介绍了用于低功耗操作的近场介电体积描记法(NF-DPG)心率传感器。通过使用从板上的共面电极的GHz频率的电磁场询问收缩和扩展血管,通过在指尖处改变介电常数来检测脉冲心率信号。该传感器采用大信号时间的边缘采样和双积分斩波器稳定技术,以最大限度地提高灵敏度,并最大限度地减少闪烁噪声。在0.18-μmCCOS技术中实现,NF-DPG心率传感器以100 Hz采样率消耗20.1μW,同时实现1.64bpm的RMS不准确性。

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