Sensing circuit with enhanced dynamic range and accuracy
US11900879B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 3, 2023 |
| Grant date | Feb 13, 2024 |
| Priority date | — |
| Expiry date | Mar 3, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/045
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A sensing circuit includes at least a first gain stage and a controller for controlling the operation of the first gain stage. The first gain stage includes an amplifier having at least one input and one output, and a feedback loop coupled between the input and the output of the amplifier. The feedback loop includes a first capacitor coupled between the input and the output of the amplifier, and a second capacitor having a first terminal coupled to the input of the amplifier through a first switch and a second terminal coupled to the output of the amplifier through a second switch. The second capacitor is configured to be coupled in parallel to the first capacitor during a first portion of a measurement cycle, and disconnected from the first capacitor during a second portion of the measurement cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.