JPS54138327A - Antenna unit - Google Patents
Antenna unitInfo
- Publication number
- JPS54138327A JPS54138327A JP4697278A JP4697278A JPS54138327A JP S54138327 A JPS54138327 A JP S54138327A JP 4697278 A JP4697278 A JP 4697278A JP 4697278 A JP4697278 A JP 4697278A JP S54138327 A JPS54138327 A JP S54138327A
- Authority
- JP
- Japan
- Prior art keywords
- synchronizing signal
- waveform distortion
- ghost
- receiver
- video signal
- 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
- Synchronizing For Television (AREA)
- Picture Signal Circuits (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Noise Elimination (AREA)
Abstract
PURPOSE: To enable to reduce ghost to the utmost in a very short time, by picking up the waveform distortion of the horizontal synchronizing signal due to the ghost from the video signal obtained from the TV receiver with the synchronizing signal for the waveform distortion amplifying and detection circuit and controlling the waveform distortion at a minimum value.
CONSTITUTION: The antennas 1A and 1B having almost the same performance are provided with a given distance and the output of both the antennas is synthesized 2 and is fed to the TV receiver. In the feeding line from, for example, the antenna 1A to the synthesizer 2, the phase shifter 3 is inserted and the amount of shift is changed with electric signal. Further, the synchronizing signal detector 10 detects the synchronizing signal from the video signal, and the waveform distortion amplifying and detection circuit 9 picks up the waveform distortion of the horizontal synchronizing signal due to ghost from the video signal obtained from the TV receiver by means of synchronizing signal. Controlling 11 is made by minimizing the waveform distortion of the horizontal synchronizing signal due to ghost by means of the output of the circuit 9. Thus, in a very short time, the ghost can be reduced.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4697278A JPS54138327A (en) | 1978-04-19 | 1978-04-19 | Antenna unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4697278A JPS54138327A (en) | 1978-04-19 | 1978-04-19 | Antenna unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54138327A true JPS54138327A (en) | 1979-10-26 |
Family
ID=12762158
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4697278A Pending JPS54138327A (en) | 1978-04-19 | 1978-04-19 | Antenna unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54138327A (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4874917A (en) * | 1971-12-30 | 1973-10-09 | ||
JPS50155122A (en) * | 1974-06-03 | 1975-12-15 | ||
JPS5292423A (en) * | 1976-01-30 | 1977-08-03 | Toshiba Corp | Automatic ghost rejecting unit |
-
1978
- 1978-04-19 JP JP4697278A patent/JPS54138327A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4874917A (en) * | 1971-12-30 | 1973-10-09 | ||
JPS50155122A (en) * | 1974-06-03 | 1975-12-15 | ||
JPS5292423A (en) * | 1976-01-30 | 1977-08-03 | Toshiba Corp | Automatic ghost rejecting unit |
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