JPS5346212A - Frequency dividend ratio setting unit of programmable counter in phase fixed frequency synthesizer - Google Patents

Frequency dividend ratio setting unit of programmable counter in phase fixed frequency synthesizer

Info

Publication number
JPS5346212A
JPS5346212A JP12034776A JP12034776A JPS5346212A JP S5346212 A JPS5346212 A JP S5346212A JP 12034776 A JP12034776 A JP 12034776A JP 12034776 A JP12034776 A JP 12034776A JP S5346212 A JPS5346212 A JP S5346212A
Authority
JP
Japan
Prior art keywords
frequency
programmable counter
ratio setting
setting unit
dividend ratio
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
JP12034776A
Other languages
Japanese (ja)
Inventor
Fumio Shiina
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 JP12034776A priority Critical patent/JPS5346212A/en
Priority to US05/763,083 priority patent/US4114045A/en
Publication of JPS5346212A publication Critical patent/JPS5346212A/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
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
    • G06K7/10821—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices
    • G06K7/10831—Arrangement of optical elements, e.g. lenses, mirrors, prisms
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
    • H03J5/02—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings
    • H03J5/0245—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form
    • H03J5/0272—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form the digital values being used to preset a counter or a frequency divider in a phase locked loop, e.g. frequency synthesizer
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
    • H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Artificial Intelligence (AREA)
  • Toxicology (AREA)
  • General Health & Medical Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

PURPOSE:To control the local oscillating frequency by determining the frequency dividend ratio of the programmable counter, thru gating on and off the light emitting elements at the frequency dividend ratio setting section sequentially, in the broad band scanning type receiver.
JP12034776A 1976-01-30 1976-10-08 Frequency dividend ratio setting unit of programmable counter in phase fixed frequency synthesizer Pending JPS5346212A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP12034776A JPS5346212A (en) 1976-10-08 1976-10-08 Frequency dividend ratio setting unit of programmable counter in phase fixed frequency synthesizer
US05/763,083 US4114045A (en) 1976-01-30 1977-01-27 Optical card reader for setting frequency division ratio of programmable counter for use in synthesizer tuners

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12034776A JPS5346212A (en) 1976-10-08 1976-10-08 Frequency dividend ratio setting unit of programmable counter in phase fixed frequency synthesizer

Publications (1)

Publication Number Publication Date
JPS5346212A true JPS5346212A (en) 1978-04-25

Family

ID=14783976

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12034776A Pending JPS5346212A (en) 1976-01-30 1976-10-08 Frequency dividend ratio setting unit of programmable counter in phase fixed frequency synthesizer

Country Status (1)

Country Link
JP (1) JPS5346212A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01160731U (en) * 1988-04-26 1989-11-08

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4852120A (en) * 1971-10-30 1973-07-21
JPS50141925A (en) * 1974-05-01 1975-11-15

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4852120A (en) * 1971-10-30 1973-07-21
JPS50141925A (en) * 1974-05-01 1975-11-15

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01160731U (en) * 1988-04-26 1989-11-08

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