Patent ID: 8588439

Claim:
A variable capacitance system comprising: a first electrode; a second electrode; a layer of elastically deformable dielectric material positioned between the first and the second electrode; a first electret forming with the first electrode a first capacitor, and the first electret forming with the second electrode a second capacitor, capacitances of the first and second capacitor varying with a deformation of the dielectric layer, wherein the first electrode, the second electrode, and the first electret follow deformations of the dielectric layer and a deformation of the dielectric layer causes an inverse variation of the capacitances of the first capacitor and of the second capacitor, the first electrode including at least two portions configured to move closer together or further away from one another, the first electret is positioned between the two portions of the first electrode, and edges of the two portions form with the first electret the first capacitor, and the first electret is on or in the dielectric layer.