KR970023251A - Data pattern adaptive clock recovery method and apparatus - Google Patents
Data pattern adaptive clock recovery method and apparatus Download PDFInfo
- Publication number
- KR970023251A KR970023251A KR1019950034756A KR19950034756A KR970023251A KR 970023251 A KR970023251 A KR 970023251A KR 1019950034756 A KR1019950034756 A KR 1019950034756A KR 19950034756 A KR19950034756 A KR 19950034756A KR 970023251 A KR970023251 A KR 970023251A
- Authority
- KR
- South Korea
- Prior art keywords
- phase error
- error value
- output signal
- signal
- output
- Prior art date
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Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
- G11B20/10222—Improvement or modification of read or write signals clock-related aspects, e.g. phase or frequency adjustment or bit synchronisation
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
- G11B20/10037—A/D conversion, D/A conversion, sampling, slicing and digital quantisation or adjusting parameters thereof
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
Abstract
본 발명은 데이타패턴 적응형 클럭 복원방법 및 장치에 관한 것으로서, 저장기로부터 재생되는 아날로그신호를 소정의 샘플링클럭을 샘플링하여 디지탈신호로 변환하는 A/D변환기, A/D변환기의 출력신호를 동화하는 동화기, 동화기의 출력신호를 이진데이타로 판정하여 검출데이타로 출력하는 판정기, 판정기 출력신호와 등화기 출력신호의 차분값을 구하는 오차계산기, 동화기의 출력신호와 오차계산기의 출력신호를 입력으로 하여 샘플링클럭의 위상오차값을 계산하고, 저장기기에 기록된 데이타패턴에 따라 위상오차값을 적응적으로 조정하여 출력하는 적응형 위상비교부와, 적응형 위상비교부에서 출력되는 위상오차값에 따라 발진클럭의 주파수를 조정하여 A/D변환기의 샘플링클럭으로 공급하는 클럭발진기로 구성된다. 따라서, 선형적인 위상오차값을 얻을 수 있고 위상오차 추적과정에서 데이타 패턴에 관계없이 일정한 추적량에 따라 위상오차를 제거할 수 있으므로, 오동작의 가능성을 줄일 수 있다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data pattern adaptive clock recovery method and apparatus, wherein an analog signal reproduced from a storage unit is converted to a digital signal by sampling a predetermined sampling clock and an output signal of an A / D converter. A moving imager that determines the output signal of the moving imager as binary data and outputs it as detection data, an error calculator for obtaining a difference value between the determiner output signal and the equalizer output signal, the output signal of the moving imager and the error calculator An adaptive phase comparator for calculating the phase error value of the sampling clock using the signal as an input, and adaptively adjusting and outputting the phase error value according to the data pattern recorded in the storage device. It consists of a clock oscillator that adjusts the frequency of the oscillation clock according to the phase error value and supplies it to the sampling clock of the A / D converter. Therefore, the linear phase error value can be obtained and the phase error can be eliminated according to the constant tracking amount regardless of the data pattern in the phase error tracking process, thereby reducing the possibility of malfunction.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.
제2도는 본 발명에 의한 데이타패턴 적응형 클럭 복원장치를 나타낸 블럭도.2 is a block diagram showing a data pattern adaptive clock recovery apparatus according to the present invention.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950034756A KR100355391B1 (en) | 1995-10-10 | 1995-10-10 | Method and apparatus for restoring data pattern adaptive clock |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950034756A KR100355391B1 (en) | 1995-10-10 | 1995-10-10 | Method and apparatus for restoring data pattern adaptive clock |
Publications (2)
Publication Number | Publication Date |
---|---|
KR970023251A true KR970023251A (en) | 1997-05-30 |
KR100355391B1 KR100355391B1 (en) | 2002-12-18 |
Family
ID=37489453
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019950034756A KR100355391B1 (en) | 1995-10-10 | 1995-10-10 | Method and apparatus for restoring data pattern adaptive clock |
Country Status (1)
Country | Link |
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KR (1) | KR100355391B1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001356729A (en) * | 2000-06-15 | 2001-12-26 | Nec Mitsubishi Denki Visual Systems Kk | Picture display device |
US7889818B2 (en) * | 2006-11-14 | 2011-02-15 | Samsung Electronics Co., Ltd. | Method and apparatus for controlling sampling of signals produced in relation to stored data |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2621188B1 (en) * | 1987-09-25 | 1989-12-29 | Labo Electronique Physique | CIRCUIT FOR RECOVERING THE CARRIER WAVE OF DIGITAL TRANSMISSION SYSTEMS |
IN171869B (en) * | 1988-10-24 | 1993-01-30 | Du Pont |
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1995
- 1995-10-10 KR KR1019950034756A patent/KR100355391B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
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KR100355391B1 (en) | 2002-12-18 |
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