Variable capacitance circuit, circuit device, and oscillator
US11587925B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 2, 2022 |
| Grant date | Feb 21, 2023 |
| Priority date | — |
| Expiry date | Feb 2, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B2200/005
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A variable capacitance circuit includes a capacitor array having a first capacitor in which a plurality of MIM capacitors are coupled in parallel and a second capacitor in which a plurality of MIM capacitors are coupled in series, and a switch array having a first switch and a second switch. A shape pattern of at least one of a first electrode of the first capacitor, a first ground shield, a second electrode of the second capacitor, and a second ground shield is set so that a first capacitance difference per 1 LSB between first capacitance values of the first capacitor when the first switch is turned on and off and a second capacitance difference per 1 LSB between second capacitance values of the second capacitor when the second switch is turned on and off are close to each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.