Patent ID: 10547204

Abstract:
The present invention relates to an energy harvesting circuit for harvesting energy from at least one energy source. The circuit comprises: an oscillating circuit comprising an inductor and a first capacitor for temporarily storing charges from the energy source and connected in series with the inductor, the inductor being connected to a first oscillating circuit node, while the first capacitor being connected to a second oscillating circuit node; a first switch connected between the first oscillating circuit node and the energy source for selectively connecting and disconnecting the energy source to or from the oscillating circuit; a second switch connected between ground and the first oscillating circuit node for generating a negative voltage across the first capacitor during oscillations of the oscillating circuit for collecting charges from the at least one energy source when the voltage across the first capacitor is negative; a voltage regulating element for controlling voltage across the energy source; a control circuit for controlling opening and closing of the first and second switches; and a clock signal generator for providing a clock signal to the control circuit to allow opening and closing the first and second switches in a timely coordinated manner.