WO2006086455A3 - Method and system to enhance differential dynamic range and signal/noise in cmos range finding systems using differential sensors - Google Patents

Method and system to enhance differential dynamic range and signal/noise in cmos range finding systems using differential sensors Download PDF

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Publication number
WO2006086455A3
WO2006086455A3 PCT/US2006/004398 US2006004398W WO2006086455A3 WO 2006086455 A3 WO2006086455 A3 WO 2006086455A3 US 2006004398 W US2006004398 W US 2006004398W WO 2006086455 A3 WO2006086455 A3 WO 2006086455A3
Authority
WO
WIPO (PCT)
Prior art keywords
differential
signal
noise
dynamic range
cmos
Prior art date
Application number
PCT/US2006/004398
Other languages
French (fr)
Other versions
WO2006086455A2 (en
Inventor
Cyrus Bamji
Khaled Salama
Original Assignee
Canesta Inc
Cyrus Bamji
Khaled Salama
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 Canesta Inc, Cyrus Bamji, Khaled Salama filed Critical Canesta Inc
Publication of WO2006086455A2 publication Critical patent/WO2006086455A2/en
Publication of WO2006086455A3 publication Critical patent/WO2006086455A3/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/483—Details of pulse systems
    • G01S7/486—Receivers
    • G01S7/487—Extracting wanted echo signals, e.g. pulse detection
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/88—Lidar systems specially adapted for specific applications
    • G01S17/89—Lidar systems specially adapted for specific applications for mapping or imaging
    • G01S17/894—3D imaging with simultaneous measurement of time-of-flight at a 2D array of receiver pixels, e.g. time-of-flight cameras or flash lidar
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/88—Lidar systems specially adapted for specific applications
    • G01S17/93—Lidar systems specially adapted for specific applications for anti-collision purposes
    • G01S17/931—Lidar systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/483—Details of pulse systems
    • G01S7/486—Receivers
    • G01S7/4868—Controlling received signal intensity or exposure of sensor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/741—Circuitry for compensating brightness variation in the scene by increasing the dynamic range of the image compared to the dynamic range of the electronic image sensors
    • 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
    • H04N25/778—Pixel circuitry, e.g. memories, A/D converters, pixel amplifiers, shared circuits or shared components comprising amplifiers shared between a plurality of pixels, i.e. at least one part of the amplifier must be on the sensor array itself
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/483—Details of pulse systems
    • G01S7/486—Receivers
    • G01S7/4861—Circuits for detection, sampling, integration or read-out
    • G01S7/4863—Detector arrays, e.g. charge-transfer gates

Abstract

Dynamic range of a differential pixel is enhanced by injecting, synchronously or asynchronously, a fixed compensating offset (ΔV) into a differential signal capacitor whenever magnitude of the differential signal across the capacitor exceeds a predetermined value. The number (N) of ΔV offsets made is counted. Effective differential signal capacitor voltage V(t) = Vo + N-ΔV, where Vo is capacitor voltage. Differential pixel signal/noise ratio is increased by dynamically maximizing operational amplifier gain AG for each differential pixel.
PCT/US2006/004398 2005-02-08 2006-02-08 Method and system to enhance differential dynamic range and signal/noise in cmos range finding systems using differential sensors WO2006086455A2 (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US65090205P 2005-02-08 2005-02-08
US65090105P 2005-02-08 2005-02-08
US65090005P 2005-02-08 2005-02-08
US60/650,901 2005-02-08
US60/650,900 2005-02-08
US60/650,902 2005-02-08

Publications (2)

Publication Number Publication Date
WO2006086455A2 WO2006086455A2 (en) 2006-08-17
WO2006086455A3 true WO2006086455A3 (en) 2007-01-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2006/004398 WO2006086455A2 (en) 2005-02-08 2006-02-08 Method and system to enhance differential dynamic range and signal/noise in cmos range finding systems using differential sensors

Country Status (1)

Country Link
WO (1) WO2006086455A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2116864A1 (en) 2008-05-09 2009-11-11 Vrije Universiteit Brussel TOF range finding with background radiation suppression
CN114594494B (en) * 2022-01-13 2022-10-21 杭州宏景智驾科技有限公司 Laser radar system and ambient light denoising method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4786818A (en) * 1987-11-09 1988-11-22 California Institute Of Technology Integrated sensor and processor for visual images
US6512838B1 (en) * 1999-09-22 2003-01-28 Canesta, Inc. Methods for enhancing performance and data acquired from three-dimensional image systems
US6522395B1 (en) * 1999-04-30 2003-02-18 Canesta, Inc. Noise reduction techniques suitable for three-dimensional information acquirable with CMOS-compatible image sensor ICS
US6813046B1 (en) * 2000-11-07 2004-11-02 Eastman Kodak Company Method and apparatus for exposure control for a sparsely sampled extended dynamic range image sensing device
US6906793B2 (en) * 2000-12-11 2005-06-14 Canesta, Inc. Methods and devices for charge management for three-dimensional sensing

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4786818A (en) * 1987-11-09 1988-11-22 California Institute Of Technology Integrated sensor and processor for visual images
US6522395B1 (en) * 1999-04-30 2003-02-18 Canesta, Inc. Noise reduction techniques suitable for three-dimensional information acquirable with CMOS-compatible image sensor ICS
US6512838B1 (en) * 1999-09-22 2003-01-28 Canesta, Inc. Methods for enhancing performance and data acquired from three-dimensional image systems
US6813046B1 (en) * 2000-11-07 2004-11-02 Eastman Kodak Company Method and apparatus for exposure control for a sparsely sampled extended dynamic range image sensing device
US6906793B2 (en) * 2000-12-11 2005-06-14 Canesta, Inc. Methods and devices for charge management for three-dimensional sensing

Also Published As

Publication number Publication date
WO2006086455A2 (en) 2006-08-17

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