Sensor apparatus
US6396045B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 10, 2000 |
| Grant date | May 28, 2002 |
| Priority date | — |
| Expiry date | Mar 10, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/76
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention provides a sensor apparatus (200) with compensated signal processing for generating a sensor signal corresponding to a filtered image of a scene. The apparatus (200) incorporates a multielement array (52) for providing at each element (58) first and second signals in response to first and second scene images projected onto it and a lens assembly (204) for projecting the images onto the array (52). Each element (58) is connected to an associated circuit (300). Each circuit (300) performs a subtraction of the first and second signals of its associated element from one another to provide a difference signal and supply this signal for use in generating the sensor signal. Each circuit (300) incorporates a transistor (T17) for injecting charge to compensate at least partially for subtraction accuracy degrading parasitic charge injection occurring within the circuit (300) when the apparatus (200) switches between projecting the first image and the second image onto the array (52).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.