Capacitance-to-digital conversion circuit, a capacitance-to-digital conversion method and an electronic chip
US11973510B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 2022 |
| Grant date | Apr 30, 2024 |
| Priority date | — |
| Expiry date | Oct 28, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/458
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Disclosed are a capacitance-to-digital conversion circuit, a capacitance-to-digital conversion method and an electronic chip. The capacitance-to-digital conversion circuit includes a first module, a comparator and an adaptive range-shift module; the first module includes a successive approximation unit, a first adder, a first digital-to-analog converter, a second adder, a third adder and an integrating unit. The first module further includes a second digital-to-analog converter connected to the third adder. The comparator, the adaptive range-shift module and the first adder are connected in series and the comparator is connected to the second digital-to-analog converter. By the present application, the adverse influence caused by the parasitic and interference is well avoided, the capacitance-to-digital conversion circuit may work in a harsh environment, the robustness of the circuit is significantly improved and the application range of the circuit is expanded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.