JPS5739614A - Tuner - Google Patents

Tuner

Info

Publication number
JPS5739614A
JPS5739614A JP11522780A JP11522780A JPS5739614A JP S5739614 A JPS5739614 A JP S5739614A JP 11522780 A JP11522780 A JP 11522780A JP 11522780 A JP11522780 A JP 11522780A JP S5739614 A JPS5739614 A JP S5739614A
Authority
JP
Japan
Prior art keywords
terminal
voltage
variable resistor
changeover switch
band
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.)
Granted
Application number
JP11522780A
Other languages
Japanese (ja)
Other versions
JPS6237846B2 (en
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 JP11522780A priority Critical patent/JPS5739614A/en
Publication of JPS5739614A publication Critical patent/JPS5739614A/en
Publication of JPS6237846B2 publication Critical patent/JPS6237846B2/ja
Granted 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 selecting the upper limit of tuning variable range with a band changeover switch. CONSTITUTION:When a channel selection switch 16 selects the 1st terminal and a band changeover switch 8 is connected to a VHF terminal being a vacant terminal, since the band discrimination signal line is detached from ground, a transistor (TR)6 turns on, a voltage of 30 volts applied to a turning variable resistor 17, and a set voltage at this variable resistor 17 passes through a diode 21 and is outputted as a tuning voltage at an output terminal 26 with impedance conversion at a TR25. Then, when the switch 16 is changed over to the 2nd terminal, since a band changeover switch 9 is connected to a UHF terminal, the TR6 turns off and a voltage almost equal to a voltage adjusted by a variable resistor 34 appears at the emitter of a TR7 and this is applied to a variable resistor 18.
JP11522780A 1980-08-20 1980-08-20 Tuner Granted JPS5739614A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11522780A JPS5739614A (en) 1980-08-20 1980-08-20 Tuner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11522780A JPS5739614A (en) 1980-08-20 1980-08-20 Tuner

Publications (2)

Publication Number Publication Date
JPS5739614A true JPS5739614A (en) 1982-03-04
JPS6237846B2 JPS6237846B2 (en) 1987-08-14

Family

ID=14657493

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11522780A Granted JPS5739614A (en) 1980-08-20 1980-08-20 Tuner

Country Status (1)

Country Link
JP (1) JPS5739614A (en)

Also Published As

Publication number Publication date
JPS6237846B2 (en) 1987-08-14

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