KR940027514A - Adjacent Channel Interference Prevention Circuit of Television Receiver - Google Patents
Adjacent Channel Interference Prevention Circuit of Television Receiver Download PDFInfo
- Publication number
- KR940027514A KR940027514A KR1019930008156A KR930008156A KR940027514A KR 940027514 A KR940027514 A KR 940027514A KR 1019930008156 A KR1019930008156 A KR 1019930008156A KR 930008156 A KR930008156 A KR 930008156A KR 940027514 A KR940027514 A KR 940027514A
- Authority
- KR
- South Korea
- Prior art keywords
- signal
- frequency
- outputs
- television receiver
- tuning
- Prior art date
Links
Landscapes
- Noise Elimination (AREA)
Abstract
본 발명은 PLL이 내장된 튜너를 갖는 텔레비젼 수상기에서 6채널 방송신호를 수신시 인접 채널인 A5채널 방송신호의 간섭으로 인하여 화면상에 나타나는 비트가 발생하는 것을 제거할 수 있는 것에 관한 것으로, 크리스탈 발진회로의 기준 주파수를 4.0MHz로부터 천이하여 비트가 비디오 캐리어에 실리지 않게 함으로써 비트가 없는 깨끗한 TV화면을 시청할 수가 있는 것이다.The present invention relates to eliminating the occurrence of bits appearing on the screen due to the interference of the A5 channel broadcast signal, which is an adjacent channel, when receiving a 6 channel broadcast signal from a television receiver having a tuner with a built-in PLL. By shifting the reference frequency of the circuit from 4.0 MHz so that no bits are carried on the video carrier, a clear TV screen without bits can be viewed.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.
제1도는 PLL가 내장된 일반적인 튜너의 블록도, 제2도는 제1도의 튜너에 의하여 6채널 방송신호를 수신할 때 주파수 대역에 나타나는 신호도, 제3도는 6채널 방송신호 수신시 중간 주파수 대역에서 나타나는 비디오 캐리어의 파형도, 제4도는 제3도의 비도 캐리어의 일부분을 확대한 파형도, 제5도는 종래의 비디오 캐리어에 비트가 실려있는 파형도, 제6도는 파형도, 제6도는 본 발명에 의하여 비디오 캐리어에 비트가 실려있지 않는 파형도이다.FIG. 1 is a block diagram of a general tuner incorporating a PLL, FIG. 2 is a signal diagram appearing in a frequency band when a six channel broadcast signal is received by the tuner of FIG. 1, and FIG. 3 is an intermediate frequency band when a six channel broadcast signal is received. 4 is a waveform diagram showing an enlarged portion of the non-carrier carrier of FIG. 3, FIG. 5 is a waveform diagram showing bits in a conventional video carrier, FIG. 6 is a waveform diagram, and FIG. This is a waveform diagram in which no bits are loaded on the video carrier.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019930008156A KR940027514A (en) | 1993-05-12 | 1993-05-12 | Adjacent Channel Interference Prevention Circuit of Television Receiver |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019930008156A KR940027514A (en) | 1993-05-12 | 1993-05-12 | Adjacent Channel Interference Prevention Circuit of Television Receiver |
Publications (1)
Publication Number | Publication Date |
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KR940027514A true KR940027514A (en) | 1994-12-10 |
Family
ID=67137304
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019930008156A KR940027514A (en) | 1993-05-12 | 1993-05-12 | Adjacent Channel Interference Prevention Circuit of Television Receiver |
Country Status (1)
Country | Link |
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KR (1) | KR940027514A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7605838B2 (en) | 2004-09-14 | 2009-10-20 | Samsung Electronics Co., Ltd | Broadcast signal receiving apparatus and method of filtering noise signals |
-
1993
- 1993-05-12 KR KR1019930008156A patent/KR940027514A/en not_active Application Discontinuation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7605838B2 (en) | 2004-09-14 | 2009-10-20 | Samsung Electronics Co., Ltd | Broadcast signal receiving apparatus and method of filtering noise signals |
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