WO1999046929A8 - Charge-domain analog readout for an image sensor - Google Patents

Charge-domain analog readout for an image sensor

Info

Publication number
WO1999046929A8
WO1999046929A8 PCT/US1999/005278 US9905278W WO9946929A8 WO 1999046929 A8 WO1999046929 A8 WO 1999046929A8 US 9905278 W US9905278 W US 9905278W WO 9946929 A8 WO9946929 A8 WO 9946929A8
Authority
WO
WIPO (PCT)
Prior art keywords
values
charge
image sensor
column
buses
Prior art date
Application number
PCT/US1999/005278
Other languages
French (fr)
Other versions
WO1999046929A1 (en
Inventor
Alexander J Krymski
Original Assignee
Photobit Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Photobit Corp filed Critical Photobit Corp
Priority to AU29978/99A priority Critical patent/AU2997899A/en
Publication of WO1999046929A1 publication Critical patent/WO1999046929A1/en
Publication of WO1999046929A8 publication Critical patent/WO1999046929A8/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/60—Noise processing, e.g. detecting, correcting, reducing or removing noise
    • H04N25/63—Noise processing, e.g. detecting, correcting, reducing or removing noise applied to dark current
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/60—Noise processing, e.g. detecting, correcting, reducing or removing noise
    • H04N25/616—Noise processing, e.g. detecting, correcting, reducing or removing noise involving a correlated sampling function, e.g. correlated double sampling [CDS] or triple sampling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/70—SSIS architectures; Circuits associated therewith
    • H04N25/71—Charge-coupled device [CCD] sensors; Charge-transfer registers specially adapted for CCD sensors
    • H04N25/75—Circuitry for providing, modifying or processing image signals from the pixel array
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/70—SSIS architectures; Circuits associated therewith
    • H04N25/76—Addressed sensors, e.g. MOS or CMOS sensors
    • H04N25/767—Horizontal readout lines, multiplexers or registers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/70—SSIS architectures; Circuits associated therewith
    • H04N25/76—Addressed sensors, e.g. MOS or CMOS sensors
    • H04N25/77—Pixel circuitry, e.g. memories, A/D converters, pixel amplifiers, shared circuits or shared components

Abstract

A CMOS imager includes an array of CMOS active pixel sensors (30), and multiple column readout circuits (52) each of which is associated with a respective column of sensors (49) in the array (30) and can perform correlated double sampling of values from a sensor (50) in the respective column (49). Each column readout circuit (52) also includes a crowbar switch (M5) which selectively can be enabled to force the stored values to an operational amplifier-based charge sensing circuit (54) via a pair of buses (70, 72). The operational amplifier-based charge sensing circuit (54), which includes a pair of switched integrators (74, 76) each of which is coupled to one of the buses (70, 72), provides a differential output based on the values stored by a selected one of the column readout circuits (52).
PCT/US1999/005278 1998-03-10 1999-03-10 Charge-domain analog readout for an image sensor WO1999046929A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU29978/99A AU2997899A (en) 1998-03-10 1999-03-10 Charge-domain analog readout for an image sensor

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US7760598P 1998-03-10 1998-03-10
US60/077,605 1998-03-10
US09/265,133 1999-03-08
US09/265,133 US6222175B1 (en) 1998-03-10 1999-03-08 Charge-domain analog readout for an image sensor

Publications (2)

Publication Number Publication Date
WO1999046929A1 WO1999046929A1 (en) 1999-09-16
WO1999046929A8 true WO1999046929A8 (en) 1999-12-23

Family

ID=26759464

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1999/005278 WO1999046929A1 (en) 1998-03-10 1999-03-10 Charge-domain analog readout for an image sensor

Country Status (2)

Country Link
US (1) US6222175B1 (en)
WO (1) WO1999046929A1 (en)

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Also Published As

Publication number Publication date
US6222175B1 (en) 2001-04-24
WO1999046929A1 (en) 1999-09-16

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