High performance inductive sensing all digital phase locked loop
US11552635B2 · kind B2 · utility
2Cited by
12References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2019 |
| Grant date | Jan 10, 2023 |
| Priority date | — |
| Expiry date | Oct 7, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L2207/50
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
One inductive sensor is configured to maintain a fixed frequency in a resonant circuit. One apparatus includes an inductance-to-digital converter (LDC). The LDC includes a digital filter to measure an inductance change of a sensor and convert the inductance change to a digital value. The LDC further includes a digital control loop to maintain a fixed frequency in the sensor. The sensor forms an oscillator in the digital control loop. An output of the digital control loop is representative of the inductance change of the sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.