US Patent 12013292 Self-powered sensors for long-term monitoring

A sensor system for detecting events includes an array of memory devices and a read-out interface. Each memory device includes a floating-gate with a sensing interface, the sensing interface having an energy barrier configured to leak electrons at a predetermined electron leakage rate through Fowler-Nordheim (F-N) tunneling. An an input to the sensing interface is configured to alter a geometry of the energy barrier to change the electron leakage rate. The read-out interface is communicatively coupled to at least one memory device, and is configured to retrieve data stored on the at least one memory device for analysis.