JPS56102132A - Band change-over circuit - Google Patents

Band change-over circuit

Info

Publication number
JPS56102132A
JPS56102132A JP440580A JP440580A JPS56102132A JP S56102132 A JPS56102132 A JP S56102132A JP 440580 A JP440580 A JP 440580A JP 440580 A JP440580 A JP 440580A JP S56102132 A JPS56102132 A JP S56102132A
Authority
JP
Japan
Prior art keywords
band
over
band change
change
trimmer
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
JP440580A
Other languages
Japanese (ja)
Inventor
Tateji Oki
Takashi Ebisawa
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP440580A priority Critical patent/JPS56102132A/en
Publication of JPS56102132A publication Critical patent/JPS56102132A/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

Abstract

PURPOSE:To reduce number of trimmer condensers to one and, at the same time, to reduce number of adjusting processes, by setting the ratio of the maximum frequency to the minimum frequeucy in the split band to a constant value. CONSTITUTION:Band change-over switches 22-25 and band change-over coils 27-30 are the switch and coil to be used for band change-over when the reception band is, for instance, changed into 4-split band. Trimmer condenser 31 is installed in parallel to each series circuit of switches 22-25 and coils 27-30. In this case, by selection maximum frequency fmax and minimum frequency fmin of the band so that their ratio will become constant, number of the trimmer condenser is redused to one and number of adjusting process are also reduced.
JP440580A 1980-01-18 1980-01-18 Band change-over circuit Pending JPS56102132A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP440580A JPS56102132A (en) 1980-01-18 1980-01-18 Band change-over circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP440580A JPS56102132A (en) 1980-01-18 1980-01-18 Band change-over circuit

Publications (1)

Publication Number Publication Date
JPS56102132A true JPS56102132A (en) 1981-08-15

Family

ID=11583408

Family Applications (1)

Application Number Title Priority Date Filing Date
JP440580A Pending JPS56102132A (en) 1980-01-18 1980-01-18 Band change-over circuit

Country Status (1)

Country Link
JP (1) JPS56102132A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60149225A (en) * 1984-01-14 1985-08-06 Yaesu Musen Co Ltd Automatic antenna tuner
US6101257A (en) * 1996-07-26 2000-08-08 Sgs-Thomson Microelectronics Gmbh Audio signal processor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60149225A (en) * 1984-01-14 1985-08-06 Yaesu Musen Co Ltd Automatic antenna tuner
US6101257A (en) * 1996-07-26 2000-08-08 Sgs-Thomson Microelectronics Gmbh Audio signal processor

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