JPS554162A - Channel selector - Google Patents
Channel selectorInfo
- Publication number
- JPS554162A JPS554162A JP7720378A JP7720378A JPS554162A JP S554162 A JPS554162 A JP S554162A JP 7720378 A JP7720378 A JP 7720378A JP 7720378 A JP7720378 A JP 7720378A JP S554162 A JPS554162 A JP S554162A
- Authority
- JP
- Japan
- Prior art keywords
- channel
- ram19
- bits
- channel selection
- selection voltages
- 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
Abstract
PURPOSE: To prevent a channel different from a display channel from being selected by equipping the channel selector of a television receiver, using an electronic tuner, with two memory units stored with channel selection voltages.
CONSTITUTION: A channel selected by channel selection operation part 4 is displayed by display unit 7, and channel selection voltages are read out from two RAM18 and RAM19 and supplied to tuner 1 via D-A converter 2. In this case, channel selection voltages of all channels are made into digital signals of 12 bits; for example, upper six bits are stored in RAM18 and lower six bits are in RAM19. Then, the output of RAM19 is supplied to converter 2 via up-down counter 20 and through the operations of fine-tuning switches 10 and 11, counter 20 corrects lower- bit information, so that memory information in RAM19 will be rewritten. Therefore, since upper six bits are fixed in ROM18, adjustment ranges of switches 10 and 11 narrow, and consequently, a channel different from a display channel will never be selected.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7720378A JPS554162A (en) | 1978-06-26 | 1978-06-26 | Channel selector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7720378A JPS554162A (en) | 1978-06-26 | 1978-06-26 | Channel selector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS554162A true JPS554162A (en) | 1980-01-12 |
Family
ID=13627260
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7720378A Pending JPS554162A (en) | 1978-06-26 | 1978-06-26 | Channel selector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS554162A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5981130U (en) * | 1982-11-22 | 1984-06-01 | 株式会社光電製作所 | Synthesizer receiver frequency setter |
-
1978
- 1978-06-26 JP JP7720378A patent/JPS554162A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5981130U (en) * | 1982-11-22 | 1984-06-01 | 株式会社光電製作所 | Synthesizer receiver frequency setter |
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