JPS56160130A - Limiting circuit for tuning range of electronic tuner - Google Patents

Limiting circuit for tuning range of electronic tuner

Info

Publication number
JPS56160130A
JPS56160130A JP17366479A JP17366479A JPS56160130A JP S56160130 A JPS56160130 A JP S56160130A JP 17366479 A JP17366479 A JP 17366479A JP 17366479 A JP17366479 A JP 17366479A JP S56160130 A JPS56160130 A JP S56160130A
Authority
JP
Japan
Prior art keywords
tuning
electronic tuner
limiting
circuit
limiting circuit
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
JP17366479A
Other languages
Japanese (ja)
Inventor
Tsuyoshi Kondo
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP17366479A priority Critical patent/JPS56160130A/en
Publication of JPS56160130A publication Critical patent/JPS56160130A/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
    • H03J5/24—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 a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection
    • H03J5/242—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 a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection
    • H03J5/244—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 a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection using electronic means

Abstract

PURPOSE:To give a limitation, when necessary, to the tuning range of an electronic tuner, by limiting the variable range of the tuning voltage to be applied to a varactor diode. CONSTITUTION:A VHF high band is selected by a tuner control circuit 3, and then the maximum value of a maximum limit voltage setting variable resistance VR1 is set at the upper limit frequency along with the minimum value of a minimum limit voltage setting variable resistance VR2 set at the lower limit frequency, respectively. Accordingly, an electronic tuner 1 is impossible to receive an outside cable band. Then a VHF low band is selected by the circuit 3, and thus no selection signal VH is applied to a tuning limiting circuit 11. As a result, no limiting action is given to the tuning voltage.
JP17366479A 1979-12-27 1979-12-27 Limiting circuit for tuning range of electronic tuner Pending JPS56160130A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17366479A JPS56160130A (en) 1979-12-27 1979-12-27 Limiting circuit for tuning range of electronic tuner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17366479A JPS56160130A (en) 1979-12-27 1979-12-27 Limiting circuit for tuning range of electronic tuner

Publications (1)

Publication Number Publication Date
JPS56160130A true JPS56160130A (en) 1981-12-09

Family

ID=15964803

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17366479A Pending JPS56160130A (en) 1979-12-27 1979-12-27 Limiting circuit for tuning range of electronic tuner

Country Status (1)

Country Link
JP (1) JPS56160130A (en)

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