Bolometric detector with a temperature-adaptive biasing
US8987668B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 2014 |
| Grant date | Mar 24, 2015 |
| Priority date | — |
| Expiry date | Feb 18, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/673
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An infrared detector including an array of detection bolometers each having a bolometric membrane suspended above a substrate, and associated with each bolometer: a detection branch, including the bolometer and a circuit performing a biasing according to a voltage set point, a compensation branch, including a compensation bolometer thermalized to the substrate, a circuit performing a biasing according to a voltage set point, an integrator for generating a voltage by integrating a difference between the currents flowing through said branches, a circuit generating a quantity depending on substrate temperature, including: a bolometer thermalized to the substrate, and a circuit for biasing the bolometer, and a circuit for generating the voltage set points according to said quantity. When the array is exposed to a uniform reference scene, the average of the differences between currents flowing through said branches is within the integrator dynamic range for a substrate temperature range from −30° C.-90° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.