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Continuous, battery-free operation of sensor nodes requires ultra-low-powersensing and data-logging techniques. Here we report that by directly coupling asensor/transducer signal into globally asymptotically stable monotonicdynamical systems based on Fowler-Nordheim quantum tunneling, one can achieveself-powered sensing at an energy budget that is currently unachievable usingconventional energy harvesting methods. The proposed device uses a differentialarchitecture to compensate for environmental variations and the device canretain sensed information for durations ranging from hours to days. With atheoretical operating energy budget less than 10 attojoules, we demonstratethat when integrated with a miniature piezoelectric transducer the proposedsensor-data-logger can measure cumulative "action" due to ambient mechanicalacceleration without any additional external power.

A Self-powered Analog Sensor-data-logging Device based on Fowler-Nordheim Dynamical Systems