Crosstalk cancellation in a multi-color CCD signal processor
US6330081A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 20, 1998 |
| Grant date | Dec 11, 2001 |
| Priority date | — |
| Expiry date | Nov 20, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/58
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus are provided for canceling crosstalk noise arising on signal lines output from an image sensor. More specifically, the crosstalk noise is canceled by a current mirror that is coupled to the signal line. The current mirror adjusts the voltage level on the signal line by drawing a current therefrom that is proportional to the amount and polarity of the crosstalk noise. The amount of crosstalk noise is determined by an amount of coupling within an A/D converter coupled to the signal lines. The current mirrors can further adjust the voltage on the signal line by drawing a current therefrom that is proportional to crosstalk arising due to a voltage level on another signal line. Such a current mirror allows pixel data to be conveyed to the A/D converter, via the signal lines, without imparting aberrations due to crosstalk noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.