JPS54120501A - Automatic channel selector - Google Patents

Automatic channel selector

Info

Publication number
JPS54120501A
JPS54120501A JP2837378A JP2837378A JPS54120501A JP S54120501 A JPS54120501 A JP S54120501A JP 2837378 A JP2837378 A JP 2837378A JP 2837378 A JP2837378 A JP 2837378A JP S54120501 A JPS54120501 A JP S54120501A
Authority
JP
Japan
Prior art keywords
tuning voltage
circuit
signal
voltage
tuner
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
JP2837378A
Other languages
Japanese (ja)
Inventor
Nobuo Minoura
Yasukazu Yoshinaga
Isao Matsumura
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 JP2837378A priority Critical patent/JPS54120501A/en
Publication of JPS54120501A publication Critical patent/JPS54120501A/en
Pending legal-status Critical Current

Links

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

PURPOSE: To simplify preset channel selection by providing a method of storing the tuning voltage of each channel selected automatically.
CONSTITUTION: On receiving saarch start signal from start-stop circuit 9, tuning voltage generating circuit 10 generates a sweep voltage, which is supplied as a tuning voltage to tuner 2. Once a detection output is obtained from AFT circuit 4 during the reception of a television signal, a variation ratio of a tuning voltage lowers and serach operation starts at a low speed. When the supply of the search stop signal stops, the generation of the sweep voltage of tuning voltage generating circuit 10 also stops, so that the tuning voltage supplied to tuner 2 will be held constant. During this, signal decision circuit 12 discriminates whether a normal television signal arrives or not; when the normal one is identified, tuning voltage information at that time is stored in memory 11 and preset channel selection ends.
COPYRIGHT: (C)1979,JPO&Japio
JP2837378A 1978-03-10 1978-03-10 Automatic channel selector Pending JPS54120501A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2837378A JPS54120501A (en) 1978-03-10 1978-03-10 Automatic channel selector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2837378A JPS54120501A (en) 1978-03-10 1978-03-10 Automatic channel selector

Publications (1)

Publication Number Publication Date
JPS54120501A true JPS54120501A (en) 1979-09-19

Family

ID=12246816

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2837378A Pending JPS54120501A (en) 1978-03-10 1978-03-10 Automatic channel selector

Country Status (1)

Country Link
JP (1) JPS54120501A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63290011A (en) * 1987-05-21 1988-11-28 Seiko Epson Corp High speed automatic channel selecting circuit for television

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63290011A (en) * 1987-05-21 1988-11-28 Seiko Epson Corp High speed automatic channel selecting circuit for television

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