JPS5733823A - Band switching circuit of electronic tuner in television receiver - Google Patents

Band switching circuit of electronic tuner in television receiver

Info

Publication number
JPS5733823A
JPS5733823A JP10862180A JP10862180A JPS5733823A JP S5733823 A JPS5733823 A JP S5733823A JP 10862180 A JP10862180 A JP 10862180A JP 10862180 A JP10862180 A JP 10862180A JP S5733823 A JPS5733823 A JP S5733823A
Authority
JP
Japan
Prior art keywords
terminal
becomes
band
develops
switching 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.)
Granted
Application number
JP10862180A
Other languages
Japanese (ja)
Other versions
JPS6234290B2 (en
Inventor
Hideo Honda
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.)
Victor Company of Japan Ltd
Original Assignee
Victor Company of Japan 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 Victor Company of Japan Ltd filed Critical Victor Company of Japan Ltd
Priority to JP10862180A priority Critical patent/JPS5733823A/en
Publication of JPS5733823A publication Critical patent/JPS5733823A/en
Publication of JPS6234290B2 publication Critical patent/JPS6234290B2/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

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

PURPOSE:To manufacture an electronic tuner at a low cost by using the parts in common, by adapting the band switching voltage to two different type electronic tuners which are mainly used at present. CONSTITUTION:In changeover switches SWVL, SWVH of a high band and a low band of the VHF band, when the SWVL is made an on-state, a diode D1 becomes off and a transistor (TR)Q10 also becomes off, therefore, no output develops to a terminal VH, and since a TRQ8 also becomes off, no output develops to a terminal VU either. On the other hand, a TRQ9 becomes on, an output develops to a terminal VV, a TRQ12 becomes on, an output develops to a terminal VL, and slso working voltage develops to a terminal VS, too. In this way, all voltage required for switching the electric tuner is obtained by two band changeover switches.
JP10862180A 1980-08-07 1980-08-07 Band switching circuit of electronic tuner in television receiver Granted JPS5733823A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10862180A JPS5733823A (en) 1980-08-07 1980-08-07 Band switching circuit of electronic tuner in television receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10862180A JPS5733823A (en) 1980-08-07 1980-08-07 Band switching circuit of electronic tuner in television receiver

Publications (2)

Publication Number Publication Date
JPS5733823A true JPS5733823A (en) 1982-02-24
JPS6234290B2 JPS6234290B2 (en) 1987-07-25

Family

ID=14489432

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10862180A Granted JPS5733823A (en) 1980-08-07 1980-08-07 Band switching circuit of electronic tuner in television receiver

Country Status (1)

Country Link
JP (1) JPS5733823A (en)

Also Published As

Publication number Publication date
JPS6234290B2 (en) 1987-07-25

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