JPS5464924A - Signal decision circuit for automatic channel selector - Google Patents

Signal decision circuit for automatic channel selector

Info

Publication number
JPS5464924A
JPS5464924A JP13186377A JP13186377A JPS5464924A JP S5464924 A JPS5464924 A JP S5464924A JP 13186377 A JP13186377 A JP 13186377A JP 13186377 A JP13186377 A JP 13186377A JP S5464924 A JPS5464924 A JP S5464924A
Authority
JP
Japan
Prior art keywords
circuit
signal
normal
synchronous state
automatic channel
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
JP13186377A
Other languages
Japanese (ja)
Other versions
JPS5821985B2 (en
Inventor
Nobuo Minoura
Isao Matsumura
Yasukazu Yoshinaga
Takao Abumi
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 JP52131863A priority Critical patent/JPS5821985B2/en
Publication of JPS5464924A publication Critical patent/JPS5464924A/en
Publication of JPS5821985B2 publication Critical patent/JPS5821985B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Television Receiver Circuits (AREA)

Abstract

PURPOSE: To increase the signal decision accuracy by detecing whether or not the synchronous state is normal via the synchronous state detector circuit and then securing the logical product between the normal output of the counter and the detection output of the detector circuit.
CONSTITUTION: Start-stop circuit 9 detects the automatic channel selection command for the automatic channel selection operation plus the arriving TV signal and then draws out the search start and stop signals to control tuning voltage generator circuit 10. Signal decision circuit 12 decides the contents of the TV signal to give the memory command to memory circuit 10 when the TV signal contents is normal and to give the re-search start signal to circuit 9 in case the contents is not normal. Here, whether the synchronous state is normal or not is detected through synchronous state detector circuit 14, and AND 15 is secured between the normal output of counter 15 and the detection output of circuit 14 to lead out the memory command. Thus, the signal decision accuracy can be increased.
COPYRIGHT: (C)1979,JPO&Japio
JP52131863A 1977-11-02 1977-11-02 Signal discrimination circuit for automatic channel selection equipment Expired JPS5821985B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP52131863A JPS5821985B2 (en) 1977-11-02 1977-11-02 Signal discrimination circuit for automatic channel selection equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52131863A JPS5821985B2 (en) 1977-11-02 1977-11-02 Signal discrimination circuit for automatic channel selection equipment

Publications (2)

Publication Number Publication Date
JPS5464924A true JPS5464924A (en) 1979-05-25
JPS5821985B2 JPS5821985B2 (en) 1983-05-06

Family

ID=15067876

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52131863A Expired JPS5821985B2 (en) 1977-11-02 1977-11-02 Signal discrimination circuit for automatic channel selection equipment

Country Status (1)

Country Link
JP (1) JPS5821985B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60153041U (en) * 1984-03-21 1985-10-12 三洋電機株式会社 Preset tuner

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4885033A (en) * 1972-01-27 1973-11-12
JPS5020528U (en) * 1973-06-20 1975-03-08

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4885033A (en) * 1972-01-27 1973-11-12
JPS5020528U (en) * 1973-06-20 1975-03-08

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60153041U (en) * 1984-03-21 1985-10-12 三洋電機株式会社 Preset tuner

Also Published As

Publication number Publication date
JPS5821985B2 (en) 1983-05-06

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