On-chip bias calibration for microbolometer detectors and readout integrated circuits
US11108975B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 11, 2018 |
| Grant date | Aug 31, 2021 |
| Priority date | — |
| Expiry date | Jul 25, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F39/184
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A readout circuit that allows on-chip bias calibration of a microbolometer focal plane array (FPA). The readout circuit includes a memory for storing one or more biasing values for a plurality of pixels within the FPA, the plurality of pixels being arranged in one or more columns and one or more rows within the FPA. The readout circuit further includes a column readout connected to the memory and configured to search for the one or more biasing values and to apply a bias adjustment based on the one or more biasing values to a signal received from the FPA. The readout circuit further includes a column multiplexer connected to the column readout and configured to perform dynamic column selection for one or more columns of pixels within the FPA.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.