Resistive sensor interface
US12117316B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 2023 |
| Grant date | Oct 15, 2024 |
| Priority date | — |
| Expiry date | Jun 10, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R27/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sensor interface for a resistive sensor has an analog front end comprising. The analog front end has an analog input/output (I/O) sensor port to be coupled to the resistive sensor. An integration stage is coupled to the analog I/O sensor port to oscillate at an oscillation frequency proportional to a sensor resistance of the resistive sensor. The integration stage has a variable integrator capacitance to vary the oscillation frequency. A gain stage is coupled to the integration stage and has a variable gain to vary the oscillation frequency of the integration stage. The sensor interface also has a smart digital controller (SDC) coupled to the analog front end to compute the sensor resistance of the resistive sensor based on the oscillation frequency. In addition, the SDC automatically detects unstable oscillation in the integration stage and causes the variable gain and the variable integrator capacitance to change.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.