Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Reissue Patent
2006-04-26
2010-10-26
Epps, Georgia Y. (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
C250S214100
Reissue Patent
active
RE041865
ABSTRACT:
A CMOS image sensor performing an analog correlated double sampling is disclosed. The CMOS image sensor may include an image capture device for capturing an image for analog image signal from an object an analog-to-digital converter for converting the analog image signal to a digital value using a ramp signal. In such an arrangement the analog-to-digital converter may includes a chopper-type comparator receiving the analog image signal and the ramp signal and a capacitor for receiving a start voltage of the ramp signal and charging a voltage level corresponding the start voltage of the ramp signal in a reset mode and for receiving a down-ramping signal of the ramp signal in a count mode in order to remove an device offset voltage. The analog-to-digital converter may also include a ramp signal generator providing the ramp signal to the analog-to-digital converter.
REFERENCES:
patent: 5877715 (1999-03-01), Gowda et al.
patent: 5920274 (1999-07-01), Gowda et al.
patent: 5982318 (1999-11-01), Yiannoulos
patent: 6025875 (2000-02-01), Vu et al.
patent: 6040570 (2000-03-01), Levine et al.
patent: 6064239 (2000-05-01), Matsuoka
patent: 6346696 (2002-02-01), Kwon
patent: 6423957 (2002-07-01), Kim et al.
patent: 6456170 (2002-09-01), Segawa et al.
patent: 6727486 (2004-04-01), Choi
patent: 2002/0051067 (2002-05-01), Henderson et al.
patent: 57-139973 (1982-08-01), None
patent: 01-125071 (1989-05-01), None
patent: 04-196688 (1992-07-01), None
patent: 09-247494 (1997-09-01), None
patent: 09-270961 (1997-10-01), None
patent: 10-304133 (1998-11-01), None
Epps Georgia Y.
Ko Tony
McAndrews Held & Malloy Ltd.
LandOfFree
CMOS image sensor having a chopper-type comparator to... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with CMOS image sensor having a chopper-type comparator to..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and CMOS image sensor having a chopper-type comparator to... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4159466