JPS54138327A - Antenna unit - Google Patents

Antenna unit

Info

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
Application number
JP4697278A
Other languages
Japanese (ja)
Inventor
Hideo Iwata
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP4697278A priority Critical patent/JPS54138327A/en
Publication of JPS54138327A publication Critical patent/JPS54138327A/en
Pending legal-status Critical Current

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
JP4697278A 1978-04-19 1978-04-19 Antenna unit Pending JPS54138327A (en)

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)

* Cited by examiner, † Cited by third party
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
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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