A novel ultra-low power arterial pulse wave sensor design achieves significant reductions in power consumption and settling time for wearable applications.
Ultra-low-power APW sensor design advances wearable monitoring feasibility; simulation leaves open hardware validation and clinical translation.
A dedicated ultra-low power arterial pulse wave (APW) sensor for wrist watch type system is implemented in 0.18-μm CMOS technology with 1.8-V supply. A duty cycle controlled (DCC) current source (CS) enables low-power consuming current injection with 98% power reduction. A DC balanced amplifier reduces settling time by 72%, enabling fast APW signal acquisition when motion artifact is occurred. The simulated 2.125-mm2 single chip APW sensor consumes only 54-μW.
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Kim et al. (2016) studied this question.
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