High performance inductive sensing all digital phase locked loop
US11973498B2 · kind B2 · utility
0Cited by
3References
18Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 21, 2022 |
| Grant date | Apr 30, 2024 |
| Priority date | — |
| Expiry date | Dec 21, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L2207/50
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Front-end circuits that combine inductive and capacitive sensing are described. In one embodiment, an apparatus includes a plurality of inductive elements, an inductive measurement circuit, and a frequency divider circuit. The inductive measurement circuit is to output a first signal with a first frequency. The first signal is associated with an inductance change of one of the inductive elements. A feedback circuit can maintain the sinusoidal operation of the first signal. The frequency divider circuit can generate a second signal with a second frequency that is lower than the first frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.