JPS5489501A - Tuning circuit between vhf/uhf switching stages - Google Patents

Tuning circuit between vhf/uhf switching stages

Info

Publication number
JPS5489501A
JPS5489501A JP15970777A JP15970777A JPS5489501A JP S5489501 A JPS5489501 A JP S5489501A JP 15970777 A JP15970777 A JP 15970777A JP 15970777 A JP15970777 A JP 15970777A JP S5489501 A JPS5489501 A JP S5489501A
Authority
JP
Japan
Prior art keywords
vhf
circuit
circuits
uhf
frequency
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
JP15970777A
Other languages
Japanese (ja)
Inventor
Fumio Ishikawa
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 JP15970777A priority Critical patent/JPS5489501A/en
Publication of JPS5489501A publication Critical patent/JPS5489501A/en
Pending legal-status Critical Current

Links

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

PURPOSE: To simplify the constitution of a circuit without causing a mutual interference by using circuits in common in a VHF-UHF high-frequency part as many as possible.
CONSTITUTION: By way of high-frequency input tuning circuits 33V, 33U and HFA34 and high-frequency inter-stage tuning circuits 35V and 35U, TV signals of VHF and UHF are supplied to mixer circuit 37, where they are converted into intermediate frequencies by outputs of VHF and UHF local oscillation circuit 39 respectively before being outputted via IF filter 41. In circuit 35V, a low/high band changeover of VHF is made by the output of control circuit 36 and in circuit 33V, no low/high band changeover is made. Further, IF filter 41 has narrow-band double hump response and eliminates unneeded signals definitely. Among input and inter- stage, and local oscillation circuits, unused circuits are turned OFF by a switching element.
COPYRIGHT: (C)1979,JPO&Japio
JP15970777A 1977-12-27 1977-12-27 Tuning circuit between vhf/uhf switching stages Pending JPS5489501A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15970777A JPS5489501A (en) 1977-12-27 1977-12-27 Tuning circuit between vhf/uhf switching stages

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15970777A JPS5489501A (en) 1977-12-27 1977-12-27 Tuning circuit between vhf/uhf switching stages

Publications (1)

Publication Number Publication Date
JPS5489501A true JPS5489501A (en) 1979-07-16

Family

ID=15699535

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15970777A Pending JPS5489501A (en) 1977-12-27 1977-12-27 Tuning circuit between vhf/uhf switching stages

Country Status (1)

Country Link
JP (1) JPS5489501A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59151519A (en) * 1983-02-17 1984-08-30 Matsushita Electric Ind Co Ltd Electronic tuner
JPS61154308A (en) * 1984-12-21 1986-07-14 三星電子部品株式会社 Tuning circuit for television

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59151519A (en) * 1983-02-17 1984-08-30 Matsushita Electric Ind Co Ltd Electronic tuner
JPS61154308A (en) * 1984-12-21 1986-07-14 三星電子部品株式会社 Tuning circuit for television

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