JPS56147513A - Channel preset circuit - Google Patents

Channel preset circuit

Info

Publication number
JPS56147513A
JPS56147513A JP5034580A JP5034580A JPS56147513A JP S56147513 A JPS56147513 A JP S56147513A JP 5034580 A JP5034580 A JP 5034580A JP 5034580 A JP5034580 A JP 5034580A JP S56147513 A JPS56147513 A JP S56147513A
Authority
JP
Japan
Prior art keywords
channel
tuning voltage
depressed
switch
sweep
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
JP5034580A
Other languages
Japanese (ja)
Inventor
Koichi Wakabayashi
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 JP5034580A priority Critical patent/JPS56147513A/en
Publication of JPS56147513A publication Critical patent/JPS56147513A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/18—Automatic scanning over a band of frequencies

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

PURPOSE:To operate the circuit accurately and independently of the state of electric field and to make the operation easy, by presetting channel through rise and fall of tuning voltage through the operation of the 1st and 2nd frequency sweep switches. CONSTITUTION:When the channel A is preset, the channel selection button A is first depressed. Then, either one of the frequency sweep switch 5 or 6 is depressed and the tuning voltage is swept toward either high or low direction. Thus, when the broadcast signal of the channel A is started to be received, the IC terminal 18 is at low level with the synchronizing signal applied to the terminal 15 to delay the sweep of the tuning voltage of IC1. In this case, the switch 5 or 6 is released when the state of picture is the best after reaching the normal tuning point to stop the sweep of the tuning voltage. Further, when other channel selection button is depressed, the tuning voltage corresponding to the channel A is stored in the memory IC2. Further, when a channel is skipped, the switch 19 for unnecessary station skip is depressed.
JP5034580A 1980-04-18 1980-04-18 Channel preset circuit Pending JPS56147513A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5034580A JPS56147513A (en) 1980-04-18 1980-04-18 Channel preset circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5034580A JPS56147513A (en) 1980-04-18 1980-04-18 Channel preset circuit

Publications (1)

Publication Number Publication Date
JPS56147513A true JPS56147513A (en) 1981-11-16

Family

ID=12856318

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5034580A Pending JPS56147513A (en) 1980-04-18 1980-04-18 Channel preset circuit

Country Status (1)

Country Link
JP (1) JPS56147513A (en)

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