JPS5742222A - Tuner - Google Patents

Tuner

Info

Publication number
JPS5742222A
JPS5742222A JP11754180A JP11754180A JPS5742222A JP S5742222 A JPS5742222 A JP S5742222A JP 11754180 A JP11754180 A JP 11754180A JP 11754180 A JP11754180 A JP 11754180A JP S5742222 A JPS5742222 A JP S5742222A
Authority
JP
Japan
Prior art keywords
voltage
tuning
tuner
conductive
lower limit
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
JP11754180A
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 JP11754180A priority Critical patent/JPS5742222A/en
Publication of JPS5742222A publication Critical patent/JPS5742222A/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 adjacent without change of tuner, by supplying a voltage of specified value as a tuning voltage, when a tuning voltage applied to an electronic tuner is a given value or lower. CONSTITUTION:In a television receiver using an electronic tuner, when band changeover switches 8-11 are changed over to the VHF terminal, a transistor (TR)52 is conductive, a lower limit voltage set TR46 of a tuning variable range is cut off and the lower limit voltage is not generated. When the switches 8-11 are changed over to the UHF terminal, the TR52 is cut off, the TR46 is conductive, and when a tuning voltage set by tuning variable resistors 17-20 is lower than a voltage set by a variable resistor 43, a switching diode 49 is conductive and a voltage at a tuning voltage output terminal 26 is kept at a lower limit voltage set by the resistor 43. Thus, the standard tuner is used as it is and the reception of the adjacent specific electromagnetic waves can be prevented surely.
JP11754180A 1980-08-26 1980-08-26 Tuner Pending JPS5742222A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11754180A JPS5742222A (en) 1980-08-26 1980-08-26 Tuner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11754180A JPS5742222A (en) 1980-08-26 1980-08-26 Tuner

Publications (1)

Publication Number Publication Date
JPS5742222A true JPS5742222A (en) 1982-03-09

Family

ID=14714343

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11754180A Pending JPS5742222A (en) 1980-08-26 1980-08-26 Tuner

Country Status (1)

Country Link
JP (1) JPS5742222A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6031244A (en) * 1983-08-01 1985-02-18 Oki Electric Ind Co Ltd Semiconductor device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6031244A (en) * 1983-08-01 1985-02-18 Oki Electric Ind Co Ltd Semiconductor device

Similar Documents

Publication Publication Date Title
JPS567573A (en) Television receiver of multisystem
JPS5742222A (en) Tuner
ES8608258A1 (en) Television receiver input circuit.
JPS54103601A (en) Uhf electronic tuner
JPS5739615A (en) Tuner
WO1979000544A1 (en) Manually oerated tuning means
JPS5742223A (en) Tuner
JPS5739614A (en) Tuner
JPS5733823A (en) Band switching circuit of electronic tuner in television receiver
JPS56132011A (en) Tuner device of television receiver
JPS57166744A (en) Am electronic tuner circuit
JPS55134583A (en) Automatic preset channel selector of television receiver
GB1160684A (en) Improvements in or relating to Devices for Automatically Tuning Electric Signal Receivers
JPS5570139A (en) Tuner for wire broadcasting television
JPS57135529A (en) Vhf tuner
JPS5619219A (en) Stop signal generating circuit for automatic tuning receiver
JPS55107325A (en) Automatic frequency control circuit for receiver
JPS5643880A (en) Television receiver
JPS5287310A (en) Input tuning circuit in television receiver etc.
JPS55151811A (en) Band switching circuit of tuner
JPS5623036A (en) Fm tuner
JPS5710536A (en) Mixing circuit
JPS54128610A (en) High frequency amplifying circuit
JPS567516A (en) Channel selection unit for receiver
JPS57184330A (en) Fm receiver