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公开(公告)号：DE68914557D1
公开(公告)日：1994-05-19
申请号：DE68914557
申请日：1989-09-14
Applicant: IBM
Inventor： CHEN SHIN CHUNG , PROVAZEK LIONEL DANIEL
Abstract: A data recovery apparatus comprises means (12) for measuring the phase difference between an input data signal and a reference data clock signal, means (13, 14) responsive to the phase difference to vary the frequency of the reference data clock signal so as to reduce the phase difference, and means for combining the input data signal with the reference data clock signal to produce a standardised output signal. The phase difference measuring means comprises means for producing a control signal indicative of a potentially uncorrectable phase difference error, and means responsive to the control signal for shifting the phase of the input data signal in time relative to the phase of the reference data clock signal before measuring the phase difference.
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公开(公告)号：BR8904626A
公开(公告)日：1990-04-24
申请号：BR8904626
申请日：1989-09-14
Applicant: IBM
Inventor： CHEN SHIN CHUNG , PROVAZEK LIONEL DANIEL
Abstract: A data recovery apparatus comprises means (12) for measuring the phase difference between an input data signal and a reference data clock signal, means (13, 14) responsive to the phase difference to vary the frequency of the reference data clock signal so as to reduce the phase difference, and means for combining the input data signal with the reference data clock signal to produce a standardised output signal. The phase difference measuring means comprises means for producing a control signal indicative of a potentially uncorrectable phase difference error, and means responsive to the control signal for shifting the phase of the input data signal in time relative to the phase of the reference data clock signal before measuring the phase difference.
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公开(公告)号：DE3166431D1
公开(公告)日：1984-11-08
申请号：DE3166431
申请日：1981-06-03
Applicant: IBM
Inventor： PERNER FRED ANDREW , PROVAZEK LIONEL DANIEL
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Patent Agency Ranking
公开(公告)号：DE68914557T2
公开(公告)日：1994-11-17
申请号：DE68914557
申请日：1989-09-14
Applicant: IBM
Inventor： CHEN SHIN CHUNG , PROVAZEK LIONEL DANIEL
Abstract: A data recovery apparatus comprises means (12) for measuring the phase difference between an input data signal and a reference data clock signal, means (13, 14) responsive to the phase difference to vary the frequency of the reference data clock signal so as to reduce the phase difference, and means for combining the input data signal with the reference data clock signal to produce a standardised output signal. The phase difference measuring means comprises means for producing a control signal indicative of a potentially uncorrectable phase difference error, and means responsive to the control signal for shifting the phase of the input data signal in time relative to the phase of the reference data clock signal before measuring the phase difference.
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公开(公告)号：DE3669088D1
公开(公告)日：1990-03-29
申请号：DE3669088
申请日：1986-11-04
Applicant: IBM
Abstract: A pulse signal conditioner filters and equalizes signal pulses representing digital data whether or not obtained from a magnetic recording device. Modified low pass filters filter (23, 25) the pulse signals and also derive and feed forward the second time derivative of the filtered pulse signals. The filtered pulse and the second time (234, 254) derivative thereof are combined to (230, 250) slim the pulse. Further slimming is provided by delay line equalizers (27, 29) having three paths. A first path (271) for attenuating the pulse signals, a second path (272) for delaying the pulse signals for a first delay, and a third path (273-274) for delaying the pulse signals for a second delay and attenuation. Pulse signals from the three paths are combined (270) to further slim the pulse.
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公开(公告)号：MX170369B
公开(公告)日：1993-08-18
申请号：MX1750289
申请日：1989-09-11
Applicant: IBM
Inventor： CHEN SHIN CHUNG , PROVAZEK LIONEL DANIEL
Abstract: A data recovery apparatus comprises means (12) for measuring the phase difference between an input data signal and a reference data clock signal, means (13, 14) responsive to the phase difference to vary the frequency of the reference data clock signal so as to reduce the phase difference, and means for combining the input data signal with the reference data clock signal to produce a standardised output signal. The phase difference measuring means comprises means for producing a control signal indicative of a potentially uncorrectable phase difference error, and means responsive to the control signal for shifting the phase of the input data signal in time relative to the phase of the reference data clock signal before measuring the phase difference.
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公开(公告)号：AU617856B2
公开(公告)日：1991-12-05
申请号：AU4089089
申请日：1989-08-29
Applicant: IBM
Inventor： CHEN SHIN CHUNG , PROVAZEK LIONEL DANIEL
Abstract: A data recovery apparatus comprises means (12) for measuring the phase difference between an input data signal and a reference data clock signal, means (13, 14) responsive to the phase difference to vary the frequency of the reference data clock signal so as to reduce the phase difference, and means for combining the input data signal with the reference data clock signal to produce a standardised output signal. The phase difference measuring means comprises means for producing a control signal indicative of a potentially uncorrectable phase difference error, and means responsive to the control signal for shifting the phase of the input data signal in time relative to the phase of the reference data clock signal before measuring the phase difference.
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公开(公告)号：DE3277751D1
公开(公告)日：1988-01-07
申请号：DE3277751
申请日：1982-04-27
Applicant: IBM
Inventor： BROWN CAROLL JAE , PROVAZEK LIONEL DANIEL
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