JPS5616330A - Synthesizer tuner - Google Patents

Synthesizer tuner

Info

Publication number
JPS5616330A
JPS5616330A JP9223779A JP9223779A JPS5616330A JP S5616330 A JPS5616330 A JP S5616330A JP 9223779 A JP9223779 A JP 9223779A JP 9223779 A JP9223779 A JP 9223779A JP S5616330 A JPS5616330 A JP S5616330A
Authority
JP
Japan
Prior art keywords
frequency
circuit
output
numerical value
value corresponding
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
JP9223779A
Other languages
Japanese (ja)
Other versions
JPS6242535B2 (en
Inventor
Minoru Ogita
Shigenobu Kimura
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.)
Nippon Gakki Co Ltd
Original Assignee
Nippon Gakki 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 Nippon Gakki Co Ltd filed Critical Nippon Gakki Co Ltd
Priority to JP9223779A priority Critical patent/JPS5616330A/en
Publication of JPS5616330A publication Critical patent/JPS5616330A/en
Publication of JPS6242535B2 publication Critical patent/JPS6242535B2/ja
Granted legal-status Critical Current

Links

Classifications

    • 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
    • H03J5/0281—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 the digital values being held in an auxiliary non erasable memory

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

PURPOSE:To facilitate an easy compensation to the shift of the central frequency in the intermediate frequency filter, by counting the output of the local oscillator via the counter circuit to which the numerical value corresponding to the intermediate frequency is set and then giving the control to the local oscillation frequency. CONSTITUTION:The output of local oscillator 14 is supplied to counter circuit 17. At circuit 17, the numerical value corresponding to intermediate frequency fi sent from preset value setting circuit is preset, and furthermore frequency fo supplied from oscillator 14 is counted up to deliver the numerical value corresponding to fo+fi to comparator CM19. CM19 then compares the output of circuit 17 with the output of counter 20 to which the numerical value corresponding to the designated receiving frequency is set to deliver comparison signal Sa. Signal Sa passes through LPF29 and then controls oscillator 14 so that the output difference may be 0 between circuits 17 and 20 at CM19. In case the central frequency of the intermediate frequency filter is shifted from the prescribed value, circuit 18 is controlled to fit the preset value to be applied to circuit 17 to the central frequency of the filter. But no compensation is required to the contents of display unit 27 of the received frequency.
JP9223779A 1979-07-20 1979-07-20 Synthesizer tuner Granted JPS5616330A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9223779A JPS5616330A (en) 1979-07-20 1979-07-20 Synthesizer tuner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9223779A JPS5616330A (en) 1979-07-20 1979-07-20 Synthesizer tuner

Publications (2)

Publication Number Publication Date
JPS5616330A true JPS5616330A (en) 1981-02-17
JPS6242535B2 JPS6242535B2 (en) 1987-09-09

Family

ID=14048821

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9223779A Granted JPS5616330A (en) 1979-07-20 1979-07-20 Synthesizer tuner

Country Status (1)

Country Link
JP (1) JPS5616330A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59147932A (en) * 1983-01-31 1984-08-24 ハネウエル・インコ−ポレ−テッド Safety device for combustion
JPH04122117A (en) * 1990-09-13 1992-04-22 Mitsubishi Electric Corp Electronic tuning type radio receiver
US5277281A (en) * 1992-06-18 1994-01-11 Lord Corporation Magnetorheological fluid dampers

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62113033U (en) * 1986-01-06 1987-07-18

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5068252A (en) * 1973-10-18 1975-06-07
JPS5228813A (en) * 1975-08-29 1977-03-04 Sanyo Electric Co Ltd Digital synthesizer receiver

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5068252A (en) * 1973-10-18 1975-06-07
JPS5228813A (en) * 1975-08-29 1977-03-04 Sanyo Electric Co Ltd Digital synthesizer receiver

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59147932A (en) * 1983-01-31 1984-08-24 ハネウエル・インコ−ポレ−テッド Safety device for combustion
JPH04122117A (en) * 1990-09-13 1992-04-22 Mitsubishi Electric Corp Electronic tuning type radio receiver
US5277281A (en) * 1992-06-18 1994-01-11 Lord Corporation Magnetorheological fluid dampers

Also Published As

Publication number Publication date
JPS6242535B2 (en) 1987-09-09

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