Patent ID: 7956593

Claim:
A power generation circuit for generating and storing electric power utilizing electromagnetic wave energy, the power generation circuit comprising: one of an antenna or a coil that receives an ambient electromagnetic wave; a rectifying circuit that is formed on a silicon substrate and that rectifies a signal from the antenna or the coil receiving the ambient electromagnetic wave; a storage circuit that stores an output power obtained from the rectifying circuit for driving a load without the use of a power source or a battery; and a MOS transistor having a source and a drain connected to an output of the storage circuit and the load, respectively, so that the load is connected to the storage circuit in accordance with a threshold voltage of the MOS transistor; wherein the silicon substrate has a recess, and the antenna or the coil has a projecting terminal that conforms to a shape of the recess in the silicon substrate and extends into the recess to establish an electrical connection between the antenna or the coil and an element formed on the silicon substrate.