JPS573188A - Reference signal generating device - Google Patents

Reference signal generating device

Info

Publication number
JPS573188A
JPS573188A JP7631080A JP7631080A JPS573188A JP S573188 A JPS573188 A JP S573188A JP 7631080 A JP7631080 A JP 7631080A JP 7631080 A JP7631080 A JP 7631080A JP S573188 A JPS573188 A JP S573188A
Authority
JP
Japan
Prior art keywords
clocks
circuits
phase
reference signal
clock
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
JP7631080A
Other languages
Japanese (ja)
Inventor
Toshitatsu Suzuki
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP7631080A priority Critical patent/JPS573188A/en
Publication of JPS573188A publication Critical patent/JPS573188A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K15/00—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers
    • G06K15/02—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers
    • G06K15/12—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers
    • G06K15/1204—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers involving the fast moving of an optical beam in the main scanning direction
    • G06K15/1219—Detection, control or error compensation of scanning velocity or position, e.g. synchronisation

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Fax Reproducing Arrangements (AREA)
  • Facsimile Transmission Control (AREA)
  • Mechanical Optical Scanning Systems (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Combination Of More Than One Step In Electrophotography (AREA)

Abstract

PURPOSE:To generate a reference signal of a laser printer with a simple constitution through making complicated logical operation circuits unnecssary, by converting minimum states to a binary number on a basis of the state of many clocks for input of the synchronizing signal to control a digital multiplexer. CONSTITUTION:A clock of the same frequency as a reference frequency from a clock oscillator 17 is applied to a delay element 18, and clocks C1-C8 phase-shifted by 2pi/8 successively are outputted from 8 pieces of taps of the element 18. Clocks C5-C8 out the phase clocks C1-C8 are used as antiphase signals, and the logic of their output states is expressed by a three-bit binary number. Clocks C1-C4 from the element 18 are latched in latch circuits 19-22 by a synchronizing signal D, and outputs of circuits 20 and 22 are applied to control input terminals A-C of a digital multiplexer 24 through an exclusive OR circuit 3 together with outputs of circuits 19 and 21, and a clock, which has the phase nearest to the signal D, out of clocks C1-C8 is selected and is outputted as the reference signal.
JP7631080A 1980-06-06 1980-06-06 Reference signal generating device Pending JPS573188A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7631080A JPS573188A (en) 1980-06-06 1980-06-06 Reference signal generating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7631080A JPS573188A (en) 1980-06-06 1980-06-06 Reference signal generating device

Publications (1)

Publication Number Publication Date
JPS573188A true JPS573188A (en) 1982-01-08

Family

ID=13601789

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7631080A Pending JPS573188A (en) 1980-06-06 1980-06-06 Reference signal generating device

Country Status (1)

Country Link
JP (1) JPS573188A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5958756A (en) * 1982-09-28 1984-04-04 Minolta Camera Co Ltd Battery installation case for prevention of short circuits
JPS6338257U (en) * 1986-08-28 1988-03-11
US4926263A (en) * 1987-09-18 1990-05-15 Fuji Photo Film Co., Ltd. Synchronizing circuit for optical scanning apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5958756A (en) * 1982-09-28 1984-04-04 Minolta Camera Co Ltd Battery installation case for prevention of short circuits
JPH0480506B2 (en) * 1982-09-28 1992-12-18 Minolta Camera Kk
JPS6338257U (en) * 1986-08-28 1988-03-11
JPH0454686Y2 (en) * 1986-08-28 1992-12-22
US4926263A (en) * 1987-09-18 1990-05-15 Fuji Photo Film Co., Ltd. Synchronizing circuit for optical scanning apparatus

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