Closed loop control in a camera module
US11115046B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 4, 2019 |
| Grant date | Sep 7, 2021 |
| Priority date | — |
| Expiry date | Nov 1, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/687
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system may include an output stage for driving a load at an output of the output stage, a pulse-width modulation mode path configured to pre-drive the output stage in a first mode of operation, a linear mode path configured to pre-drive the output stage in a second mode of operation and a loop filter coupled at its input to the output of the output stage and coupled at its output to both of the pulse-width modulation mode path and the linear mode path. The pulse-width modulation mode path and the linear mode path may be configured such that a first transfer function between the output of the loop filter and the output of the output stage is substantially equivalent to a second transfer function between the output of the loop filter and the output of the output stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.