JPS5634221A - Channel selection unit - Google Patents

Channel selection unit

Info

Publication number
JPS5634221A
JPS5634221A JP11088379A JP11088379A JPS5634221A JP S5634221 A JPS5634221 A JP S5634221A JP 11088379 A JP11088379 A JP 11088379A JP 11088379 A JP11088379 A JP 11088379A JP S5634221 A JPS5634221 A JP S5634221A
Authority
JP
Japan
Prior art keywords
upper limit
frequency
band
frequency band
voltage
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
JP11088379A
Other languages
Japanese (ja)
Inventor
Isao Fujimoto
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric 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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP11088379A priority Critical patent/JPS5634221A/en
Publication of JPS5634221A publication Critical patent/JPS5634221A/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 make it possible to limit a receiving frequency band surely and easily, by controlling the upper limit of the tuning voltage by a Zener diode and by setting the lower limit of the tuning voltage by a DC power source. CONSTITUTION:In respect to setting of the upper limit of a receivable frequency band, the Zener voltage value of Zener diode 7 provided in tuner 1 is utilized to adjust the upper limit of the receivable frequency band in the UHF band. This frequency is set to a frequency higher than the upper limit of the broadcast frequency by 2...4MHz approximately. In respect to the upper limit of the VHF band, the upper limit of the broadcast frequency is adjusted by a voltage slightly lower than the maximum value of the tuning voltage. Next, lower limits of the VHF and the UHF bands are set by DC power source 8. As a result, the receiving frequency band can be limited surely and easily only by changing slightly the conventional receiving unit.
JP11088379A 1979-08-29 1979-08-29 Channel selection unit Pending JPS5634221A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11088379A JPS5634221A (en) 1979-08-29 1979-08-29 Channel selection unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11088379A JPS5634221A (en) 1979-08-29 1979-08-29 Channel selection unit

Publications (1)

Publication Number Publication Date
JPS5634221A true JPS5634221A (en) 1981-04-06

Family

ID=14547101

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11088379A Pending JPS5634221A (en) 1979-08-29 1979-08-29 Channel selection unit

Country Status (1)

Country Link
JP (1) JPS5634221A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60240713A (en) * 1984-05-10 1985-11-29 イー・アイ・デユポン・ドウ・ヌムール・アンド・カンパニー Melt-processable tetrafluoroethylene copolymer and manufacture
JPS62101632A (en) * 1985-10-23 1987-05-12 イー・アイ・デユポン・ドウ・ヌムール・アンド・カンパニー Melt-processable tetrafluoroethylene copolymer grain

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60240713A (en) * 1984-05-10 1985-11-29 イー・アイ・デユポン・ドウ・ヌムール・アンド・カンパニー Melt-processable tetrafluoroethylene copolymer and manufacture
JPS62101632A (en) * 1985-10-23 1987-05-12 イー・アイ・デユポン・ドウ・ヌムール・アンド・カンパニー Melt-processable tetrafluoroethylene copolymer grain
JPH0637560B2 (en) * 1985-10-23 1994-05-18 イ−・アイ・デユポン・デ・ニモアス・アンド・カンパニ− Melt-processable tetrafluoroethylene copolymer and method for producing the same

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