Filter device having tunable capacitance, method of manufacture and use thereof
US12300420B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 2022 |
| Grant date | May 13, 2025 |
| Priority date | — |
| Expiry date | Sep 14, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H2001/005
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A filter device, method of manufacture and use thereof. The filter device comprises a foil-wound inductor formed by a first conductive foil strip having a first terminal and a second terminal, the first conductive foil strip wound around a core to form a plurality of winding layers such that the first terminal is proximate the core and the second terminal is located at the outermost winding layer, and a continuous dielectric insulating layer between the plurality of layers of the first conductive foil strip; and, a tunable capacitor formed by a second conductive foil strip at least partially encircling the outermost layer of the foil-wound inductor and a dielectric insulating layer disposed therebetween, the second conductive foil strip having a portion that can be trimmed to alter a capacitance between the second conductive foil strip and the first or second terminal of the foil-wound inductor. When used in a circuit, the tunable capacitor can be trimmed to compensate for parasitic capacitance associated with the foil-wound inductor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.