Capacitive analog-to-digital converter, analog-to-digital conversion system, chip, and device
US11159172B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 14, 2020 |
| Grant date | Oct 26, 2021 |
| Priority date | — |
| Expiry date | Sep 14, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/804
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A capacitive analog-to-digital converter, an analog-to-digital conversion system, a chip, and a device. The capacitive analog-to-digital converter includes: a first capacitor array, including N first capacitor banks that include M first capacitors, where M is a positive integer greater than N; M first switches, respectively connected to first electrode plates of the M first capacitors in a one-to-one correspondence to enable a successive approximation logic controller to control connections of the first electrode plates of the M first capacitors with an output of a voltage generation circuit and with a first sampling voltage output by controlling the M first switches; a comparator, including a first input, a second input and an output; and the successive approximation logic controller, connected to the output of the comparator, and configured to control the M first switches according to comparison results output by the output of the comparator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.