Column analog-to-digital converter of a CMOS image sensor...

Details Column analog-to-digital converter of a CMOS image sensor... Column analog-to-digital converter of a CMOS image sensor...

2007-05-15

2007-05-15

Nguyen, Linh (Department: 2819)

Coded data generation or conversion

Sample and hold

C341S118000, C341S120000, C341S155000

Reexamination Certificate

active

11328591

ABSTRACT:
A column analog-to-digital (ADC) circuit for preventing a sun black effect in a CMOS image sensor (CIS) is provided. The ADC circuit includes: a comparator having a signal voltage input port and a reference voltage input port, comparing a reset voltage output from one of a plurality of CIS pixels with a reference voltage in a reset sampling period, and outputting an overflow sensing signal when the reset voltage is lower than the reference voltage; and a digital converter converting the output of the comparator into digital data, wherein the digital converter comprises a first latch storing the overflow sensing signal and outputting a flag signal indicating an overflow in response to the overflow sensing signal in a signal sampling period, when the overflow sensing signal is output from the comparator in a first portion of the reset sampling period.

REFERENCES:
patent: 5369309 (1994-11-01), Bacrania et al.
patent: 5877715 (1999-03-01), Gowda et al.
patent: 5880691 (1999-03-01), Fossum et al.
patent: 5920274 (1999-07-01), Gowda et al.
patent: 6459426 (2002-10-01), Eglit et al.
patent: 6498576 (2002-12-01), Tian et al.
patent: 6518910 (2003-02-01), Sakuragi et al.
patent: 6660989 (2003-12-01), Guo et al.
patent: 6937279 (2005-08-01), Kim et al.
patent: 1 343 310 (2003-09-01), None
patent: 05-308519 (1993-11-01), None
patent: 09-270961 (1997-10-01), None
patent: 2003-234962 (2003-08-01), None
patent: 1999-0075194 (1999-10-01), None
patent: 2002-0046957 (2002-06-01), None
patent: WO 02/054759 (2002-07-01), None

Affiliated with

Also associated with

Rating

Column analog-to-digital converter of a CMOS image sensor... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Column analog-to-digital converter of a CMOS image sensor..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Column analog-to-digital converter of a CMOS image sensor... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3804595