FR2357128A1 - Temp. compensation circuit for dark current changes - has control circuit whose inputs are connected to monitoring unit and level control stage - Google Patents

Temp. compensation circuit for dark current changes - has control circuit whose inputs are connected to monitoring unit and level control stage

Info

Publication number
FR2357128A1
FR2357128A1 FR7716359A FR7716359A FR2357128A1 FR 2357128 A1 FR2357128 A1 FR 2357128A1 FR 7716359 A FR7716359 A FR 7716359A FR 7716359 A FR7716359 A FR 7716359A FR 2357128 A1 FR2357128 A1 FR 2357128A1
Authority
FR
France
Prior art keywords
temp
dark current
monitoring unit
current changes
whose inputs
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
FR7716359A
Other languages
French (fr)
Other versions
FR2357128B1 (en
Inventor
Peter Kecskes
Laszlo Nagy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HIRADASTECHNIKA SZOEVETKEZET
Original Assignee
HIRADASTECHNIKA SZOEVETKEZET
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 HIRADASTECHNIKA SZOEVETKEZET filed Critical HIRADASTECHNIKA SZOEVETKEZET
Publication of FR2357128A1 publication Critical patent/FR2357128A1/en
Application granted granted Critical
Publication of FR2357128B1 publication Critical patent/FR2357128B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/80—Camera processing pipelines; Components thereof
    • H04N23/81—Camera processing pipelines; Components thereof for suppressing or minimising disturbance in the image signal generation

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Picture Signal Circuits (AREA)
  • Transforming Light Signals Into Electric Signals (AREA)

Abstract

The t.v. camera circuit has a temp. compensation unit to allow for dark current changes. The sensitive surface consists of semiconductor material, and has a video circuit containing the compensation unit. The voltage level input of a level restoring and limiting stage (4) is connected to the output of a control circuit (2) whose one input is connected to a monitoring unit (1), and the other input to a level control stage (3). The positive terminal of the semiconductor conversion element is connected to a diode, through a resistor to the base terminal of an FET, the drain terminal is also connected to the positive terminal. The source terminal of the FET is connected to earth through a fixed resistor, a diode and a variable resistor.
FR7716359A 1976-06-30 1977-05-27 Temp. compensation circuit for dark current changes - has control circuit whose inputs are connected to monitoring unit and level control stage Granted FR2357128A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HU76HI438A HU174921B (en) 1976-06-30 1976-06-30 Arrangement to compensate the dark current variation under influation of the temperatur in scanners, advantageously, in picture pick-up devices of semiconductor sensing surface

Publications (2)

Publication Number Publication Date
FR2357128A1 true FR2357128A1 (en) 1978-01-27
FR2357128B1 FR2357128B1 (en) 1984-02-17

Family

ID=10997180

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7716359A Granted FR2357128A1 (en) 1976-06-30 1977-05-27 Temp. compensation circuit for dark current changes - has control circuit whose inputs are connected to monitoring unit and level control stage

Country Status (4)

Country Link
DD (1) DD131512A5 (en)
DE (1) DE2729402A1 (en)
FR (1) FR2357128A1 (en)
HU (1) HU174921B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54130828A (en) * 1978-03-31 1979-10-11 Canon Inc Photo sensor array device and image scanner using it
DE19615178C2 (en) * 1996-04-17 1998-07-02 Fraunhofer Ges Forschung Device and method for image generation in digital dental radiography

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3814849A (en) * 1972-10-13 1974-06-04 Ball Brothers Res Corp Leakage current compensating circuit for semiconductor image sensor
US3839669A (en) * 1973-07-27 1974-10-01 Tektronix Inc Dark current temperature compensation via dc restoration circuit
DE2408918A1 (en) * 1974-02-25 1975-09-04 Bosch Gmbh Robert TV camera photosensitive surface dark current compensator - compensates output video signal for temperature and voltage fluctuations
US3934266A (en) * 1973-12-28 1976-01-20 Victor Company Of Japan, Limited Dark current correction circuit in two-tube color television camera

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3814849A (en) * 1972-10-13 1974-06-04 Ball Brothers Res Corp Leakage current compensating circuit for semiconductor image sensor
US3839669A (en) * 1973-07-27 1974-10-01 Tektronix Inc Dark current temperature compensation via dc restoration circuit
US3934266A (en) * 1973-12-28 1976-01-20 Victor Company Of Japan, Limited Dark current correction circuit in two-tube color television camera
DE2408918A1 (en) * 1974-02-25 1975-09-04 Bosch Gmbh Robert TV camera photosensitive surface dark current compensator - compensates output video signal for temperature and voltage fluctuations

Also Published As

Publication number Publication date
DE2729402A1 (en) 1978-01-05
HU174921B (en) 1980-04-28
FR2357128B1 (en) 1984-02-17
DD131512A5 (en) 1978-06-28

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Legal Events

Date Code Title Description
ST Notification of lapse