Scalable batteryless power supply or sbps
OwnerChundra Ramful, Salima Aleminventors
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Abstract
A scalable batteryless power supply is provided for harvesting light energy and powering a load, comprising a light energy harvester; a circuit for periodically sampling an output voltage of the energy harvester and in response generating a reference voltage; and a plurality of cascaded energy storage branches for storing energy from the energy harvester and powering the load, wherein each energy storage branch triggers charging of a downstream energy storage branch provided the voltage thereacross remains above the reference voltage.
Claims19
A scalable batteryless power supply for connection between an energy harvester and a load, comprising:
- a maximum power point tracking circuit and input switch for periodically sampling an output voltage of the energy harvester and in response generating a threshold voltage;
- a plurality of cascaded energy storage branches separated by additional switches, for cascaded storage of energy from the energy harvester and for powering the load;
- and
- wherein successive ones of the cascaded energy storage branches are activated by the additional switches in sequence from a lowest capacitance to successively higher capacitances based on the threshold voltage.
A scalable batteryless power supply for harvesting light energy and powering a load, comprising:
- a light energy harvester;
- a circuit for periodically sampling an output voltage of the energy harvester and in response generating a reference voltage;
- and
- a plurality of cascaded energy storage branches for storing energy from the energy harvester and powering the load, wherein each energy storage branch triggers charging of a downstream energy storage branch provided the voltage thereacross remains above the reference voltage.
Dependencies are inferred from the claim text.