Capacitive discharge energy harvesting converter
First Claim
1. An energy harvesting circuit, comprising an energy harvesting device, a solid state voltage dependent switch, and an inductor, wherein said solid state voltage dependent switch is connected between said energy harvesting device and said inductor, wherein said energy harvesting device converts mechanical energy into electrical energy, wherein said solid state voltage dependent switch has a first threshold and a second threshold, wherein said second threshold is below said first threshold, wherein said solid state voltage dependent switch remains open until voltage applied across said solid state voltage dependent switch from said energy harvesting device to said inductor reaches said first threshold, wherein when said voltage applied across said solid state voltage dependent switch reaches said first threshold said solid state voltage dependent switch closes so charge from said energy harvesting device flows through said solid state voltage dependent switch and through said inductor, wherein when said voltage applied across said solid state voltage dependent switch then falls below said second threshold said solid state voltage dependent switch reopens.
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Accused Products
Abstract
An energy harvesting circuit includes a device for converting mechanical energy into electrical energy, a solid state voltage dependent switch, and an inductor. The piezoelectric device, the solid state voltage dependent switch, and the inductor are all connected in series. The solid state voltage dependent switch has a first threshold The solid state voltage dependent switch remains open until voltage applied across the solid state voltage dependent switch by the device reaches the first threshold. When the voltage applied across the solid state voltage dependent switch reaches the first threshold the solid state voltage dependent switch closes so charge from the device flows through the switch and through the inductor.
34 Citations
24 Claims
- 1. An energy harvesting circuit, comprising an energy harvesting device, a solid state voltage dependent switch, and an inductor, wherein said solid state voltage dependent switch is connected between said energy harvesting device and said inductor, wherein said energy harvesting device converts mechanical energy into electrical energy, wherein said solid state voltage dependent switch has a first threshold and a second threshold, wherein said second threshold is below said first threshold, wherein said solid state voltage dependent switch remains open until voltage applied across said solid state voltage dependent switch from said energy harvesting device to said inductor reaches said first threshold, wherein when said voltage applied across said solid state voltage dependent switch reaches said first threshold said solid state voltage dependent switch closes so charge from said energy harvesting device flows through said solid state voltage dependent switch and through said inductor, wherein when said voltage applied across said solid state voltage dependent switch then falls below said second threshold said solid state voltage dependent switch reopens.
Specification