JPS5449014A - Automatic channel selector - Google Patents

Automatic channel selector

Info

Publication number
JPS5449014A
JPS5449014A JP11621777A JP11621777A JPS5449014A JP S5449014 A JPS5449014 A JP S5449014A JP 11621777 A JP11621777 A JP 11621777A JP 11621777 A JP11621777 A JP 11621777A JP S5449014 A JPS5449014 A JP S5449014A
Authority
JP
Japan
Prior art keywords
circuit
tuning
signal
channel selection
stop
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
JP11621777A
Other languages
Japanese (ja)
Inventor
Nobuo Minoura
Yasukazu Yoshinaga
Isao Matsumura
Takao Abumi
Kazuhiro Nakai
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.)
Sharp Corp
Original Assignee
Sharp 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 Sharp Corp filed Critical Sharp Corp
Priority to JP11621777A priority Critical patent/JPS5449014A/en
Priority to US05/900,199 priority patent/US4236182A/en
Priority to AU35545/78A priority patent/AU507470B2/en
Priority to DE2818956A priority patent/DE2818956C2/en
Priority to FR7812797A priority patent/FR2389289A1/en
Publication of JPS5449014A publication Critical patent/JPS5449014A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/18—Automatic scanning over a band of frequencies
    • H03J7/20—Automatic scanning over a band of frequencies where the scanning is accomplished by varying the electrical characteristics of a non-mechanically adjustable element
    • H03J7/22—Automatic scanning over a band of frequencies where the scanning is accomplished by varying the electrical characteristics of a non-mechanically adjustable element in which an automatic frequency control circuit is brought into action after the scanning action has been stopped

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

PURPOSE:To eliminate the trouble of operation by automatically making all of preset channel selections and detecting the tuning of each normal channel selection, and by presetting the them again when some channels have a difference in tuning CONSTITUTION:This device is provided with start stop circuit 9 which outputs a search start signal and search stop signal by being supplied with the channel selection signal of AFT circuit 4 of the TV receiver, the vertical synchronizing signal of synchronizing separator circuit 6, and a search start command tuning voltage generating circuit 10 which is controlled by the start and stop signals of this circuit 9. In addition, this is provided with memory circuit 11 stored with the tuning voltage from this circuit 10 as it desires and signal discrimination circuit 12 supplying the tuning voltage from circuit 11 to tuner 2. Then, tuning-differenc detection circuit 15, provided to this circuit, is operated on the basis of a channel selection command during a channel selection, and when circuit 15 detects a tuning difference, a research start signal is supplied to circuit 9 so as to attain the preset channel selection again.
JP11621777A 1977-04-30 1977-09-26 Automatic channel selector Pending JPS5449014A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP11621777A JPS5449014A (en) 1977-09-26 1977-09-26 Automatic channel selector
US05/900,199 US4236182A (en) 1977-04-30 1978-04-26 Automatic pre-programming system for TV receivers
AU35545/78A AU507470B2 (en) 1977-04-30 1978-04-28 Automatic tuning/memory scheme for use intv receivers
DE2818956A DE2818956C2 (en) 1977-04-30 1978-04-28 Automatic voting device
FR7812797A FR2389289A1 (en) 1977-04-30 1978-04-28 AUTOMATIC TUNING SYSTEM FOR TELEVISION RECEIVERS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11621777A JPS5449014A (en) 1977-09-26 1977-09-26 Automatic channel selector

Publications (1)

Publication Number Publication Date
JPS5449014A true JPS5449014A (en) 1979-04-18

Family

ID=14681723

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11621777A Pending JPS5449014A (en) 1977-04-30 1977-09-26 Automatic channel selector

Country Status (1)

Country Link
JP (1) JPS5449014A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998033319A1 (en) * 1997-01-24 1998-07-30 Sanyo Electric Co., Ltd. Television receiver

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5228801A (en) * 1975-08-29 1977-03-04 Sony Corp Channel selector

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5228801A (en) * 1975-08-29 1977-03-04 Sony Corp Channel selector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998033319A1 (en) * 1997-01-24 1998-07-30 Sanyo Electric Co., Ltd. Television receiver

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