JPS57116467A - Original detector - Google Patents

Original detector

Info

Publication number
JPS57116467A
JPS57116467A JP56002042A JP204281A JPS57116467A JP S57116467 A JPS57116467 A JP S57116467A JP 56002042 A JP56002042 A JP 56002042A JP 204281 A JP204281 A JP 204281A JP S57116467 A JPS57116467 A JP S57116467A
Authority
JP
Japan
Prior art keywords
amplifier
output
converting element
original
photoelectric converting
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
JP56002042A
Other languages
Japanese (ja)
Other versions
JPS6345550B2 (en
Inventor
Fumio Owada
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 JP56002042A priority Critical patent/JPS57116467A/en
Publication of JPS57116467A publication Critical patent/JPS57116467A/en
Publication of JPS6345550B2 publication Critical patent/JPS6345550B2/ja
Granted 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
    • H04N1/00681—Detecting the presence, position or size of a sheet or correcting its position before scanning

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Facsimiles In General (AREA)

Abstract

PURPOSE:To detect an original or turning off of a fluorescent lamp accurately by a simple circuit, by performing said detection by the amplification output of an operational amplifier which has sufficiently low output impedance. CONSTITUTION:A reference photoelectric converting element C1, a photoelectric converting element C2 for original detection, reference power sources B1, B2 and B3, and operational amplifiers 6, 7 and 9, etc., are provided. A voltage divided through the output feedback photoelectric converting element and a resistor R1 is applied to the inverted-input terminal of the amplifier 6. On the other hand, output of the amplifier 6 is applied to the inverted-input terminal of the amplifier 7 after voltage division through the converting element C2 and a resistance R2. Consequently, the output of the amplifier 7 is used to detect an original 1 entering and a fluorescent lamp 3 is being turned off.
JP56002042A 1981-01-12 1981-01-12 Original detector Granted JPS57116467A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56002042A JPS57116467A (en) 1981-01-12 1981-01-12 Original detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56002042A JPS57116467A (en) 1981-01-12 1981-01-12 Original detector

Publications (2)

Publication Number Publication Date
JPS57116467A true JPS57116467A (en) 1982-07-20
JPS6345550B2 JPS6345550B2 (en) 1988-09-09

Family

ID=11518263

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56002042A Granted JPS57116467A (en) 1981-01-12 1981-01-12 Original detector

Country Status (1)

Country Link
JP (1) JPS57116467A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS615055U (en) * 1984-06-14 1986-01-13 株式会社東芝 Original reading device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5356076A (en) * 1976-10-30 1978-05-22 Nippon Gakki Seizo Kk Photoelectric conversion system sensor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5356076A (en) * 1976-10-30 1978-05-22 Nippon Gakki Seizo Kk Photoelectric conversion system sensor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS615055U (en) * 1984-06-14 1986-01-13 株式会社東芝 Original reading device

Also Published As

Publication number Publication date
JPS6345550B2 (en) 1988-09-09

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