JPS5544209A - Preset type electronic tuner - Google Patents

Preset type electronic tuner

Info

Publication number
JPS5544209A
JPS5544209A JP11578978A JP11578978A JPS5544209A JP S5544209 A JPS5544209 A JP S5544209A JP 11578978 A JP11578978 A JP 11578978A JP 11578978 A JP11578978 A JP 11578978A JP S5544209 A JPS5544209 A JP S5544209A
Authority
JP
Japan
Prior art keywords
adjustment
frequency
ram
points
rom
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
JP11578978A
Other languages
Japanese (ja)
Inventor
Shoji Ono
Toshio Tanizoe
Mitsuo Ozawa
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 JP11578978A priority Critical patent/JPS5544209A/en
Publication of JPS5544209A publication Critical patent/JPS5544209A/en
Pending 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)

Abstract

PURPOSE:To make easy the adjustment work for electronic tuner, by transferring the frequency for adjustment written in advance to the preset area of RAM, at the initial condition setting after the application of power supply. CONSTITUTION:The value equivalent to the adjustment frequency for AM 5 points and FM 5 points is written in ROM 22. The control circuit 21 transfers the corresponding value to the adjustment frequency of ROM 22 to RAM 23 with the reset signal after application of power supply. AT the adjustment work, the signal transferred to RAM 23 is sequentially set to PLL 19, and the frequency is inputted to the tuning circuit of the high frequency amplifying circuit with the signal generator. This adjustment is made for the 5 points of the upper and lower limit frequencies and intermediate tracking frequencies by adjusting the tuning coils 121 and 131 and the semi-fixed capacitors 122 and 132. Further, the channel selection operation by the switch keyboard 24 is made the same as conventional methods.
JP11578978A 1978-09-22 1978-09-22 Preset type electronic tuner Pending JPS5544209A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11578978A JPS5544209A (en) 1978-09-22 1978-09-22 Preset type electronic tuner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11578978A JPS5544209A (en) 1978-09-22 1978-09-22 Preset type electronic tuner

Publications (1)

Publication Number Publication Date
JPS5544209A true JPS5544209A (en) 1980-03-28

Family

ID=14671100

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11578978A Pending JPS5544209A (en) 1978-09-22 1978-09-22 Preset type electronic tuner

Country Status (1)

Country Link
JP (1) JPS5544209A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63135014A (en) * 1986-11-26 1988-06-07 Sony Corp Synthesizer tuner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63135014A (en) * 1986-11-26 1988-06-07 Sony Corp Synthesizer tuner

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