Asymmetric comparator for use in pixel oversaturation detection

Details Asymmetric comparator for use in pixel oversaturation detection Asymmetric comparator for use in pixel oversaturation detection

2006-01-26

2008-09-09

Villecco, John M (Department: 2622)

Television

Camera, system and detail

Combined image signal generator and general image signal...

C348S300000

Reexamination Certificate

active

07423676

ABSTRACT:
An imaging circuit using an asymmetric comparator to detect an oversaturated pixel is disclosed. The comparator employs a transistor differential pair which are fabricated to be slightly unbalanced. By varying the channel widths of the two transistors during fabrication, the voltage required to trigger the comparator can be raised or lowered as desired to set an oversaturation level which triggers the comparator.

REFERENCES:
patent: 5025177 (1991-06-01), Mounger
patent: 5955899 (1999-09-01), Afghahi
patent: 6020768 (2000-02-01), Lim
patent: 2003/0132786 (2003-07-01), Brehmer et al.
patent: 2003/0133627 (2003-07-01), Styduhar

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