JPS54130820A - Modulation system - Google Patents
Modulation systemInfo
- Publication number
- JPS54130820A JPS54130820A JP3955778A JP3955778A JPS54130820A JP S54130820 A JPS54130820 A JP S54130820A JP 3955778 A JP3955778 A JP 3955778A JP 3955778 A JP3955778 A JP 3955778A JP S54130820 A JPS54130820 A JP S54130820A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- signal
- synchronizing
- level
- signals
- 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 realize a modulation system where a signal level can be lowered without suppressing required information included in signals by suppressing previously most synchronizing signals.
CONSTITUTION: The signal inputted to input terminal 1 is branched in two directions after the heading of synchronizing signals is clamped by peak clamper 201, and branched one is inputted to clipper 203, which clips the synchronizing part, after delayed through delay line 202. The other is supplied to synchronizing separation circuit 206 after applied to LPF 205 to remove color carrier components, and one output of circuit 206 is applied to synchronous level detector 207 to detect the synchronous level, and simultaneously, this level is converted to a corresponding DC signal and is transmitted to circuit 203 through gate circuit 209 as a clip level. Then, the other output of circuit 206 is applied to monostable multivibrator 210 to generate a signal slightly wider than the synchronizing signal which controls circuit 209. Then, the output of circuit 203 is applied to modulator 204, thereby modulating signals.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3955778A JPS54130820A (en) | 1978-04-03 | 1978-04-03 | Modulation system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3955778A JPS54130820A (en) | 1978-04-03 | 1978-04-03 | Modulation system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54130820A true JPS54130820A (en) | 1979-10-11 |
Family
ID=12556362
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3955778A Pending JPS54130820A (en) | 1978-04-03 | 1978-04-03 | Modulation system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54130820A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0381313A2 (en) * | 1989-01-28 | 1990-08-08 | The Marconi Company Limited | Television transmitter |
-
1978
- 1978-04-03 JP JP3955778A patent/JPS54130820A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0381313A2 (en) * | 1989-01-28 | 1990-08-08 | The Marconi Company Limited | Television transmitter |
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