JPS54146910A - Preset channel selection unit - Google Patents

Preset channel selection unit

Info

Publication number
JPS54146910A
JPS54146910A JP5452278A JP5452278A JPS54146910A JP S54146910 A JPS54146910 A JP S54146910A JP 5452278 A JP5452278 A JP 5452278A JP 5452278 A JP5452278 A JP 5452278A JP S54146910 A JPS54146910 A JP S54146910A
Authority
JP
Japan
Prior art keywords
counter
tuning
memory unit
channel selection
channel
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
JP5452278A
Other languages
Japanese (ja)
Inventor
Toshinori Murata
Shigeo Matsuura
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 JP5452278A priority Critical patent/JPS54146910A/en
Publication of JPS54146910A publication Critical patent/JPS54146910A/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
    • H03J5/0254—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 transfered to a D/A converter
    • H03J5/0263—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 transfered to a D/A converter 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 the correspondence between channel selection buttons and channel numbers by providing a counter, which is counted up by 1 at every tuning point, and a unit which stores the channel. CONSTITUTION:Pulses are inputted from pulse generator circuit 7 to counter 9, and the local oscillation frequency of electronic tuning tuner 1 is increased by the output of D/A converter 10. Each time an optimum tuning is obtained, counter 5 assigns an address to memory unit 11, and data of counter 9 is written in memory unit 11 by the write pulse from circuit 15. Thus, the tuning voltage code and the band code are written in the memory unit, thereby completing preset. At a channel selection time, when button 12 is depressed, the address of memory unit 11 is assigned, and the tuning voltage code is outputted to D/A converter 10, and the tuning voltage is inputted to tuner 1.
JP5452278A 1978-05-10 1978-05-10 Preset channel selection unit Pending JPS54146910A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5452278A JPS54146910A (en) 1978-05-10 1978-05-10 Preset channel selection unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5452278A JPS54146910A (en) 1978-05-10 1978-05-10 Preset channel selection unit

Publications (1)

Publication Number Publication Date
JPS54146910A true JPS54146910A (en) 1979-11-16

Family

ID=12972979

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5452278A Pending JPS54146910A (en) 1978-05-10 1978-05-10 Preset channel selection unit

Country Status (1)

Country Link
JP (1) JPS54146910A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5961265A (en) * 1982-09-29 1984-04-07 Fujitsu Ltd Method for transmitting image data
JPH0336224U (en) * 1989-08-18 1991-04-09

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5961265A (en) * 1982-09-29 1984-04-07 Fujitsu Ltd Method for transmitting image data
JPH0336224U (en) * 1989-08-18 1991-04-09

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