Integrated All Electrical Pulse Wave Velocity and Respiration Sensors Using Bio-Impedance


During this paper, we tend to propose wire-free integrated sensors that monitor pulse wave velocity (PWV) and respiration, each non-electrical important signs, by using an all-electrical technique. The key techniques that we have a tendency to use to get all-electrical and wire-free measurement are bio-impedance (BI) and analog-modulated body-channel communication (BCC), respectively. For PWV, time distinction between ECG signal from the heart and BI signal from the wrist is measured. To remove wires and avoid sampling rate mismatch between ECG and BI sensors, ECG signal is distributed to the BI sensor via analog BCC without any sampling. For respiration measurement, BI sensor is found at the abdomen to detect volume modification throughout inhalation and exhalation. A prototype chip fabricated in 0.11 $mu$ m CMOS method consists of ECG, BI sensor and BCC transceiver. Measurement results show that heart rate and PWV are both at intervals their traditional physiological range. The chip consumes one.28 mW at 1.2 V provide whereas occupying five mm×two.five mm of space.

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