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1.发明授权Method and apparatus for detecting errors read from moving-magnetic-storage device with digital interface 失效用于检测具有数字接口的移动磁存储器件中的错误读取的方法和装置
公开(公告)号：US3670304A
公开(公告)日：1972-06-13
申请号：US3670304D
申请日：1970-09-28
Applicant: IBM
Inventor： ANDRESEN ROLF , FIORINO BENJAMIN C , NICCORE FRED W
Abstract: A data signal read from magnetic tape is converted from an analog signal into a digital signal by hard limiting. This hardlimited data signal is combined with an indication as to whether the amplitude of the digital signal is above a predetermined threshold and then passed to the control unit operating with the tape drive. The control unit, in turn, detects the data, checks for parity error, phase error, and amplitude error and provides control signals back to the tape drive. These control signals are used to change the predetermined threshold used by the tape drive. The predetermined threshold is changed by these control signals in accordance with detection of a history of good data and in accordance with errors in the record block.
Abstract translation: 从磁带读取的数据信号通过硬限制从模拟信号转换成数字信号。 该硬限制数据信号与数字信号的振幅是否高于预定阈值的指示组合，然后传送到与磁带驱动器一起操作的控制单元。 控制单元依次检测数据，检查奇偶校验错误，相位误差和振幅误差，并将控制信号提供回磁带驱动器。 这些控制信号用于改变磁带驱动器使用的预定阈值。 根据检测到良好数据的历史并根据记录块中的错误，这些控制信号改变预定阈值。
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公开(公告)号：DE2917777A1
公开(公告)日：1979-11-22
申请号：DE2917777
申请日：1979-05-03
Applicant: IBM
Inventor： ANDRESEN ROLF
Abstract: A record member is provided with a plurality of sector areas, including servo track follow integration areas. The integration areas comprise an equal number of signal bursts representing binary "1" and binary "0" in a predetermined arrangement to identify a plurality of record track location lines. The predetermined arrangement of "1's" and "0's" is generated by the insertion of one of two binary codes which exhibit high self-correlation properties, at positions within the integration areas corresponding to a consecutive number of signal bursts equal to a digit in the address identifying a particular one of the track location lines. The two binary codes are complements, are composed of an odd number of signal bursts and are selected so as to maintain equal the number of signal bursts representing binary "1" and binary "0", respectively, in the servo track follow integration areas. A transducer positioning circuit is provided which has a search mode for detecting addresses of the record track location lines and a servo mode for centering the transducer with respect to a selected one of the record track location lines.
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公开(公告)号：AU3386471A
公开(公告)日：1973-03-29
申请号：AU3386471
申请日：1971-09-23
Applicant: IBM
Inventor： NICCORE FRED WILLIAM , ANDRESEN ROLF , FIORINO BENJAMIN CARMEL
Abstract: A data signal read from magnetic tape is converted from an analog signal into a digital signal by hard limiting. This hard-limited data signal is combined with an indication as to whether the amplitude of the digital signal is above a predetermined threshold and then passed to the control unit operating with the tape drive. The control unit, in turn, detects the data, checks for parity error, phase error, and amplitude error and provides control signals back to the tape drive. These control signals are used to change the predetermined threshold used by the tape drive. The predetermined threshold is changed by these control signals in accordance with detection of a history of good data and in accordance with errors in the record block.
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Patent Agency Ranking
公开(公告)号：AU3379471A
公开(公告)日：1973-03-29
申请号：AU3379471
申请日：1971-09-22
Applicant: IBM
Inventor： ANDRESEN ROLF
Abstract: A data signal read from magnetic tape is converted from an analog signal into a digital, or quasidigital, signal by hard limiting. This digital signal is combined with an indication as to whether the amplitude of the digital signal is above a predetermined threshold and then passed to a control unit operating with the tape drive. The control unit generates control signals used to change the predetermined threshold used by the tape drive. A change in threshold is made in accordance with detection of a record block and in accordance with error in the record block.
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公开(公告)号：DE3874018D1
公开(公告)日：1992-10-01
申请号：DE3874018
申请日：1988-06-14
Applicant: IBM
Inventor： ANDRESEN ROLF
Abstract: A focus and tracking lens support (46) includes a pair of bender beams (101, 102) cantilevered from a mounting block (100). A lens holder (13) is supported between the distal ends of the bender beams by two pairs of parallel support arms (105, 106) pivotally joined to the lens holder (13) and the bender beams (101, 102). The arrangement is such that when the bender beams (101, 102) are moved in the same direction tracking functions are performed while when the bender beams are moved in opposing directions, focussing functions are performed. The support arms (105, 106) and the lens holder (13) can be formed from a unitary plastics member. The bender beams can be piezo-electric beams, to which superposed electrical signals for focus and tracking controls are applied for effecting simultaneous focus and tracking functions.
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公开(公告)号：FR2426306A1
公开(公告)日：1979-12-14
申请号：FR7909393
申请日：1979-04-06
Applicant: IBM
Inventor： ANDRESEN ROLF
Abstract: A record member is provided with a plurality of sector areas, including servo track follow integration areas. The integration areas comprise an equal number of signal bursts representing binary "1" and binary "0" in a predetermined arrangement to identify a plurality of record track location lines. The predetermined arrangement of "1's" and "0's" is generated by the insertion of one of two binary codes which exhibit high self-correlation properties, at positions within the integration areas corresponding to a consecutive number of signal bursts equal to a digit in the address identifying a particular one of the track location lines. The two binary codes are complements, are composed of an odd number of signal bursts and are selected so as to maintain equal the number of signal bursts representing binary "1" and binary "0", respectively, in the servo track follow integration areas. A transducer positioning circuit is provided which has a search mode for detecting addresses of the record track location lines and a servo mode for centering the transducer with respect to a selected one of the record track location lines.
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公开(公告)号：CA945671A
公开(公告)日：1974-04-16
申请号：CA122725
申请日：1971-09-14
Applicant: IBM
Inventor： ANDRESEN ROLF
Abstract: A data signal read from magnetic tape is converted from an analog signal into a digital, or quasidigital, signal by hard limiting. This digital signal is combined with an indication as to whether the amplitude of the digital signal is above a predetermined threshold and then passed to a control unit operating with the tape drive. The control unit generates control signals used to change the predetermined threshold used by the tape drive. A change in threshold is made in accordance with detection of a record block and in accordance with error in the record block.
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公开(公告)号：CA944067A
公开(公告)日：1974-03-19
申请号：CA122731
申请日：1971-09-14
Applicant: IBM
Inventor： ANDRESEN ROLF , FIORINO BENJAMIN C , NICCORE FRED W
Abstract: A data signal read from magnetic tape is converted from an analog signal into a digital signal by hard limiting. This hard-limited data signal is combined with an indication as to whether the amplitude of the digital signal is above a predetermined threshold and then passed to the control unit operating with the tape drive. The control unit, in turn, detects the data, checks for parity error, phase error, and amplitude error and provides control signals back to the tape drive. These control signals are used to change the predetermined threshold used by the tape drive. The predetermined threshold is changed by these control signals in accordance with detection of a history of good data and in accordance with errors in the record block.
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