JPS54120501A - Automatic channel selector - Google Patents
Automatic channel selectorInfo
- 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
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
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)
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 |
-
1978
- 1978-03-10 JP JP2837378A patent/JPS54120501A/en active Pending
Cited By (1)
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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