JPS5780863A - Driving circuit for ccd photosensor - Google Patents

Driving circuit for ccd photosensor

Info

Publication number
JPS5780863A
JPS5780863A JP15645480A JP15645480A JPS5780863A JP S5780863 A JPS5780863 A JP S5780863A JP 15645480 A JP15645480 A JP 15645480A JP 15645480 A JP15645480 A JP 15645480A JP S5780863 A JPS5780863 A JP S5780863A
Authority
JP
Japan
Prior art keywords
time
electric charge
output
transferred
shift register
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
JP15645480A
Other languages
Japanese (ja)
Inventor
Yasuo Inoue
Hiromitsu Momoki
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP15645480A priority Critical patent/JPS5780863A/en
Publication of JPS5780863A publication Critical patent/JPS5780863A/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)
  • Facsimile Heads (AREA)

Abstract

PURPOSE:To eliminate the disturbance of the output due to excess electric charge to output read data faithful to an original, by sweeping always off excess electric charge of a CCD main body part in the time other than the output time of required read data. CONSTITUTION:After a storage time t1, a transfer gate control signal phiTG becomes high-level, and electric charge stored in an array part 16 is transferred to a shift register 18 through a transfer gate 17. After the elapse of a time t2, the control signal phiGT becomes L-level, and therefore, the gate 17 is closed, and electric charge transferred to the shift register 18 is transferred synchronously with clock signals phi1 and phi2 and becomes an output Vout through an output gate 19. During a time t4 after the elapse of a time t3 till the arrival of next start signal TSCAN, electric charge generated in the array part 16 is transferred to the external through the transfer gate 17 and the shift register 18 continuously. Consequently, needless electric charge of the array part 16 is swept off even during the time t4.
JP15645480A 1980-11-08 1980-11-08 Driving circuit for ccd photosensor Pending JPS5780863A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15645480A JPS5780863A (en) 1980-11-08 1980-11-08 Driving circuit for ccd photosensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15645480A JPS5780863A (en) 1980-11-08 1980-11-08 Driving circuit for ccd photosensor

Publications (1)

Publication Number Publication Date
JPS5780863A true JPS5780863A (en) 1982-05-20

Family

ID=15628095

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15645480A Pending JPS5780863A (en) 1980-11-08 1980-11-08 Driving circuit for ccd photosensor

Country Status (1)

Country Link
JP (1) JPS5780863A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6093878A (en) * 1983-10-28 1985-05-25 Canon Inc Picture reader

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6093878A (en) * 1983-10-28 1985-05-25 Canon Inc Picture reader
JPH0572789B2 (en) * 1983-10-28 1993-10-13 Canon Kk

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