JPS5564426A - Television channel selector - Google Patents
Television channel selectorInfo
- Publication number
- JPS5564426A JPS5564426A JP13757478A JP13757478A JPS5564426A JP S5564426 A JPS5564426 A JP S5564426A JP 13757478 A JP13757478 A JP 13757478A JP 13757478 A JP13757478 A JP 13757478A JP S5564426 A JPS5564426 A JP S5564426A
- Authority
- JP
- Japan
- Prior art keywords
- phase lock
- lock loop
- tuning
- loop system
- 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.)
- Granted
Links
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Abstract
PURPOSE: To perform tuning operation without digital noises by a phase lock loop system which tunes to the video carrier frequency of a desired reception channel and a tuning system which oscillates at a sound carrier frequency corresponding to the frequency.
CONSTITUTION: Corresponding to the video carrier frequency of a desired reception channel, a phase lock loop system oscillates at a local oscillation frequency. The lock state of the phase lock loop system is detected by PLL/search switch 41 to detect oscillations of the phase lock loop system nearly at a desired local oscillation frequency, thereby changing oscillations ober from the phase lock loop system to a search tuning system. Therefore, no digital noise is generated in a reception state. For tuning to a sound carrier, search tuning is operated in a direction in accordance with the sound carrier on the basis of a locak oscillation frequency equivalent to a video carrier.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13757478A JPS592204B2 (en) | 1978-11-07 | 1978-11-07 | television channel selection device |
US06/037,332 US4271434A (en) | 1978-05-17 | 1979-05-09 | Channel selector |
DE19792920180 DE2920180A1 (en) | 1978-05-17 | 1979-05-16 | CHANNEL SELECTION |
CA327,829A CA1132272A (en) | 1978-05-17 | 1979-05-17 | Channel selector |
GB7917152A GB2025172B (en) | 1978-05-17 | 1979-05-17 | Channel selector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13757478A JPS592204B2 (en) | 1978-11-07 | 1978-11-07 | television channel selection device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5564426A true JPS5564426A (en) | 1980-05-15 |
JPS592204B2 JPS592204B2 (en) | 1984-01-17 |
Family
ID=15201892
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13757478A Expired JPS592204B2 (en) | 1978-05-17 | 1978-11-07 | television channel selection device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS592204B2 (en) |
-
1978
- 1978-11-07 JP JP13757478A patent/JPS592204B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS592204B2 (en) | 1984-01-17 |
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