최소 단어 이상 선택하여야 합니다.
최대 10 단어까지만 선택 가능합니다.
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
DataON 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Edison 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0819796 (2015-08-06) |
등록번호 | US-9245569 (2016-01-26) |
발명자 / 주소 |
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출원인 / 주소 |
|
인용정보 | 피인용 횟수 : 1 인용 특허 : 442 |
A digital servo method for an optical disk drive includes receiving low-pass filtered and gain-adjusted versions of photodetector output signals resulting from an illumination of an optical disk. Versions of the photodetector signals are digitized to produce digital signals. A focus control signal i
A digital servo method for an optical disk drive includes receiving low-pass filtered and gain-adjusted versions of photodetector output signals resulting from an illumination of an optical disk. Versions of the photodetector signals are digitized to produce digital signals. A focus control signal is determined through at least one servo algorithm in a digital signal processor based on a focus error determined from the digital signals. Alternatively, a tracking control signal is determined through at least one servo algorithm in the digital signal processor based on a tracking error determined from the digital signals. An optical disk drive includes an analog-to-digital converter configured to convert low-pass filtered and gain-adjusted versions of photodetector output signals into at least one digital signal and the digital signal processor.
1. A digital servo method for an optical disk drive, comprising: receiving low-pass filtered and gain-adjusted versions of photodetector output signals resulting from an illumination of an optical disk;digitizing versions of the photodetector signals to produce digital signals; anddetermining, throu
1. A digital servo method for an optical disk drive, comprising: receiving low-pass filtered and gain-adjusted versions of photodetector output signals resulting from an illumination of an optical disk;digitizing versions of the photodetector signals to produce digital signals; anddetermining, through at least one servo algorithm in a digital signal processor, a focus control signal based on a focus error determined from the digital signals, wherein the digital signal processor is specialized for processing digital signals. 2. A digital servo method for an optical disk drive, comprising: receiving low-pass filtered and gain-adjusted versions of photodetector output signals resulting from an illumination of an optical disk;digitizing versions of the photodetector signals to produce digital signals; anddetermining, through at least one servo algorithm in a digital signal processor, a tracking control signal based on a tracking error determined from the digital signals, wherein the digital signal processor is specialized for processing digital signals. 3. A digital servo method for an optical disk drive, comprising: low-pass filtering and gain-adjusting versions of photodetector output signals resulting from an illumination of an optical disk;digitizing versions of the photodetector signals to produce digital signals; anddetermining, through at least one servo algorithm in a digital signal processor, a focus control signal based on a focus error determined from the digital signals, wherein the digital signal processor is specialized for processing digital signals. 4. The digital servo method of claim 3, comprising: adjusting one or more gain values for gain-adjusting one or more versions of the photodetector output signals based on a calculation performed by the digital signal processor. 5. The digital servo method of claim 3, comprising: determining, by the digital signal processor, one or more gain values for gain-adjusting one or more versions of the photodetector output signals. 6. The digital servo method of claim 5, comprising: gain-adjusting the one or more versions of the photodetector output signals based on the determined one or more gain values. 7. The digital servo method of claim 1, comprising: driving a focus actuator based on the focus control signal. 8. A digital servo method for an optical disk drive, comprising: low-pass filtering and gain-adjusting versions of photodetector output signals resulting from an illumination of an optical disk;digitizing versions of the photodetector signals to produce digital signals; anddetermining, through at least one servo algorithm in a digital signal processor, a tracking control signal based on a tracking error determined from the digital signals, wherein the digital signal processor is specialized for processing digital signals. 9. The digital servo method of claim 8, comprising: adjusting one or more gain values for gain-adjusting one or more versions of the photodetector output signals based on a calculation performed by the digital signal processor. 10. The digital servo method of claim 8, comprising: determining, by the digital signal processor, one or more gain values for gain-adjusting one or more versions of the photodetector output signals. 11. The digital servo method of claim 10, comprising: gain-adjusting the one or more versions of the photodetector output signals based on the determined one or more gain values. 12. The digital servo method of claim 8, comprising: driving a tracking actuator based on the tracking control signal. 13. An optical disk drive, comprising: an analog-to-digital converter configured to convert low-pass filtered and gain-adjusted versions of photodetector output signals into at least one digital signal; anda digital signal processor configured to determine a focus error from the at least one digital signal and to determine, through at least one servo algorithm, a focus control signal from the focus error, wherein the digital signal processor is specialized for processing digital signals. 14. An optical disk drive, comprising: an analog-to-digital converter configured to convert low-pass filtered and gain-adjusted versions of photodetector output signals into at least one digital signal; anda digital signal processor configured to determine a tracking error from the at least one digital signal and to determine, through at least one servo algorithm, a tracking control signal from the tracking error, wherein the digital signal processor is specialized for processing digital signals. 15. An optical disk drive, comprising: at least one low pass filter;at least one amplifier;an analog-to-digital converter configured to convert, into at least one digital signal, versions of photodetector output signals low-pass filtered by the at least one low pass filter and gain-adjusted by the at least one amplifier; anda digital signal processor configured to determine a focus error from the at least one digital signal and to determine, through at least one servo algorithm, a focus control signal from the focus error, wherein the digital signal processor is specialized for processing digital signals. 16. The optical disk drive of claim 15, wherein the digital signal processor is configured to determine one or more gain values for gain-adjusting one or more versions of the photodetector output signals. 17. The optical disk drive of claim 15, comprising: a plurality of photodetectors configured to provide, to the digital signal processor, photodetector output signals resulting from an illumination of an optical disk. 18. The optical disk drive of claim 15, comprising: a driver configured to receive, from the digital signal processor, the focus control signal and to drive a focus actuator based on the focus control signal. 19. An optical disk drive, comprising: at least one low pass filter;at least one amplifier;an analog-to-digital converter configured to convert, into at least one digital signal, versions of photodetector output signals low-pass filtered by the at least one low pass filter and gain-adjusted by the at least one amplifier; anda digital signal processor configured to determine a tracking error from the at least one digital signal and to determine, through at least one servo algorithm, a tracking control signal from the tracking error, wherein the digital signal processor is specialized for processing digital signals. 20. The optical disk drive of claim 19, wherein the digital signal processor is configured to determine one or more gain values for gain-adjusting one or more versions of the photodetector output signals. 21. The optical disk drive of claim 19, comprising: a plurality of photodetectors configured to provide, to the digital signal processor, photodetector output signals resulting from an illumination of an optical disk. 22. The optical disk drive of claim 19, comprising: a driver configured to receive, from the digital signal processor, the tracking control signal and to drive a tracking actuator based on the tracking control signal. 23. A non-transitory computer readable medium storing a computer program, executable by a machine, for a digital servo method for an optical disk drive, the computer program comprising executable instructions for: low-pass filtering and gain-adjusting versions of photodetector output signals resulting from an illumination of an optical disk;digitizing versions of the photodetector signals to produce digital signals; anddetermining, through at least one servo algorithm in a digital signal processor, a focus control signal based on a focus error determined from the digital signals, wherein the digital signal processor is specialized for processing digital signals. 24. A non-transitory computer readable medium storing a computer program, executable by a machine, for a digital servo method for an optical disk drive, the computer program comprising executable instructions for: low-pass filtering and gain-adjusting versions of photodetector output signals resulting from an illumination of an optical disk;digitizing versions of the photodetector signals to produce digital signals; anddetermining, through at least one servo algorithm in a digital signal processor, a tracking control signal based on a tracking error determined from the digital signals, wherein the digital signal processor is specialized for processing digital signals. 25. A non-transitory computer readable medium storing a computer program, executable by a machine, for a digital servo method for an optical disk drive, the computer program comprising executable instructions for: receiving low-pass filtered and gain-adjusted versions of photodetector output signals resulting from an illumination of an optical disk;digitizing versions of the photodetector signals to produce digital signals; anddetermining, through at least one servo algorithm in a digital signal processor, a focus control signal based on a focus error determined from the digital signals, wherein the digital signal processor is specialized for processing digital signals. 26. The computer program of claim 25, comprising executable instructions for: adjusting one or more gain values for gain-adjusting one or more versions of the photodetector output signals based on a calculation performed by the digital signal processor. 27. The computer program of claim 25, comprising executable instructions for: determining, by the digital signal processor, one or more gain values for gain-adjusting one or more versions of the photodetector output signals. 28. The computer program of claim 27, comprising executable instructions for: gain-adjusting the one or more versions of the photodetector output signals based on the determined one or more gain values. 29. The computer program of claim 25, comprising executable instructions for: driving a focus actuator based on the focus control signal. 30. A non-transitory computer readable medium storing a computer program, executable by a machine, for a digital servo method for an optical disk drive, the computer program comprising executable instructions for: receiving low-pass filtered and gain-adjusted versions of photodetector output signals resulting from an illumination of an optical disk;digitizing versions of the photodetector signals to produce digital signals; anddetermining, through at least one servo algorithm in a digital signal processor, a tracking control signal based on a tracking error determined from the digital signals, wherein the digital signal processor is specialized for processing digital signals. 31. The computer program of claim 30, comprising executable instructions for: adjusting one or more gain values for gain-adjusting one or more versions of the photodetector output signals based on a calculation performed by the digital signal processor. 32. The computer program of claim 30, comprising executable instructions for: determining, by the digital signal processor, one or more gain values for gain-adjusting one or more versions of the photodetector output signals. 33. The computer program of claim 32, comprising executable instructions for: gain-adjusting the one or more versions of the photodetector output signals based on the determined one or more gain values. 34. The computer program of claim 30, comprising executable instructions for: driving a tracking actuator based on the tracking control signal.
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