JPS5739615A - Tuner - Google Patents

Tuner

Info

Publication number
JPS5739615A
JPS5739615A JP11522880A JP11522880A JPS5739615A JP S5739615 A JPS5739615 A JP S5739615A JP 11522880 A JP11522880 A JP 11522880A JP 11522880 A JP11522880 A JP 11522880A JP S5739615 A JPS5739615 A JP S5739615A
Authority
JP
Japan
Prior art keywords
voltage
tuning
output terminal
variable resistor
tuner
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
JP11522880A
Other languages
Japanese (ja)
Inventor
Shigeru Nishida
Kazuo Yoshida
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP11522880A priority Critical patent/JPS5739615A/en
Publication of JPS5739615A publication Critical patent/JPS5739615A/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

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

PURPOSE:To surely prevent the reception of unnecessary electromagnetic waves, by taking a given value of voltage as a tuning voltage output if the tuning voltage applied to an electronic tuner is a given value or less. CONSTITUTION:When a channel selection switch 16 selects the 1st terminal, a voltage on a band discriminating line is applied to a tuning variable resistor 17, a voltage set with this resistor 17 is made to impedance conversion and it is applied to the electronic tuner as the tuning voltage. In this case, a power supply voltage is applied to a VHF tuner from an output terminal 36 for the selection of the 1st channel. When the tuning voltage appeared at the output terminal 26 is lower than the voltage set at a variable resistor 43, a switching diode 49 is conductive and the voltage at the output terminal 26 is kept at a voltage value set by the variable resistor 43.
JP11522880A 1980-08-20 1980-08-20 Tuner Pending JPS5739615A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11522880A JPS5739615A (en) 1980-08-20 1980-08-20 Tuner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11522880A JPS5739615A (en) 1980-08-20 1980-08-20 Tuner

Publications (1)

Publication Number Publication Date
JPS5739615A true JPS5739615A (en) 1982-03-04

Family

ID=14657515

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11522880A Pending JPS5739615A (en) 1980-08-20 1980-08-20 Tuner

Country Status (1)

Country Link
JP (1) JPS5739615A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS567515A (en) * 1979-06-29 1981-01-26 Sanyo Electric Co Ltd Tuner unit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS567515A (en) * 1979-06-29 1981-01-26 Sanyo Electric Co Ltd Tuner unit

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