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JPS55135463A - Photoelectric converting device - Google Patents

Photoelectric converting device

Info

Publication number
JPS55135463A
JPS55135463A JP4297279A JP4297279A JPS55135463A JP S55135463 A JPS55135463 A JP S55135463A JP 4297279 A JP4297279 A JP 4297279A JP 4297279 A JP4297279 A JP 4297279A JP S55135463 A JPS55135463 A JP S55135463A
Authority
JP
Japan
Prior art keywords
circuit
signal
output signal
video signal
solid state
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.)
Pending
Application number
JP4297279A
Other languages
Japanese (ja)
Inventor
Hideo Masaki
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP4297279A priority Critical patent/JPS55135463A/en
Publication of JPS55135463A publication Critical patent/JPS55135463A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40—Picture signal circuits
    • H04N1/40056—Circuits for driving or energising particular reading heads or original illumination means

Landscapes

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

Abstract

PURPOSE:To secure the accurate photoelectric conversion over a wide temperature range by measuring only the pure optical signal component contained in the output signal of the solid state pickup element. CONSTITUTION:The output signal of the solid state pickup element which scans the subject image is applied to video amplifier circuit 53 to be converted into the video signal. High pass filter 56 prevent the temperature drift of circuit 53 from being propagated to the rear step. The size of the dark signal component contained in the video signal is memorized via sample holding circuit 57, and the output signal VSH of circuit 57 is supplied to low pass filter 58. Output voltage VDS of filter 58 is applied to non-inverse amplifier circuit 59. And emitter follower circuit 60 functions as the impedance converter circuit which drives A/D converter 61 featuring the low input impedance of about 50 via video signal VSB.
JP4297279A 1979-04-11 1979-04-11 Photoelectric converting device Pending JPS55135463A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4297279A JPS55135463A (en) 1979-04-11 1979-04-11 Photoelectric converting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4297279A JPS55135463A (en) 1979-04-11 1979-04-11 Photoelectric converting device

Publications (1)

Publication Number Publication Date
JPS55135463A true JPS55135463A (en) 1980-10-22

Family

ID=12650944

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4297279A Pending JPS55135463A (en) 1979-04-11 1979-04-11 Photoelectric converting device

Country Status (1)

Country Link
JP (1) JPS55135463A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60163573A (en) * 1984-02-03 1985-08-26 Matsushita Graphic Commun Syst Inc Automatic offset adjusting device of image sensor
JPS61193559A (en) * 1985-02-22 1986-08-28 Nec Corp Electric charge transfer device
US4941051A (en) * 1988-02-03 1990-07-10 Crossfield Electronics Limited Signal processing circuit and method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60163573A (en) * 1984-02-03 1985-08-26 Matsushita Graphic Commun Syst Inc Automatic offset adjusting device of image sensor
JPS61193559A (en) * 1985-02-22 1986-08-28 Nec Corp Electric charge transfer device
JPH0518503B2 (en) * 1985-02-22 1993-03-12 Nippon Electric Co
US4941051A (en) * 1988-02-03 1990-07-10 Crossfield Electronics Limited Signal processing circuit and method

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