EP0653754A2
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EP
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Removal of precompensation in a write data signal
Assignee: HP Inc
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Filing: 1994-11-04
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Granted: —
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Expires: 2014-11-04
Abstract
Abstract A method for removing precompensation in a Write Data signal from a flexible disk controller (100). A timer (302) measures the time between consecutive transitions. Numerical values (304) from the timer are delayed in a buffer (306). Numerical times (308) from the buffer are compared to numerical ranges (310) by an array of parallel numerical comparators (312). Numerical times corresponding to precompensation ranges are numerically compensated (314). The compensated values are then used to control the time between transitions in a regenerated Write Data signal (320).
Inventors
- 👤 Daniel J. Curran
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 19:13
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/10009; G11B20/10046; G11B20/10194; G11B5/00; G11B5/02; G11B5/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
A method of converting a precompensated time interval to an ideal time interval in a data storage system, which can generate a Write Data signal comprising consecutive binary transitions, with an ideal time interval between two consecutive binary transitions, the ideal time interval having been modified to a precompensated time interval; the method comprising the steps of: a. timing (302) the precompensated time interval to generate a numerical time (304); b. comparing (312) the numerical time to a plurality of numerical time ranges (310), each numerical time range including a corresponding compensation calculation (314); c. selecting from the plurality of numerical time ranges the numerical time range which includes the numerical time; d. performing the compensation calculation corresponding to the selected numerical time range to generate (318) a compensated numerical time; e. waiting an amount of time corresponding to the compensated numerical time; and f. generating a binary waveform transition.
Claim 2
Dependent Claim
165 words
Conversion apparatus for converting a precompensated time interval to an ideal time interval in a data storage system which can generate a Write Data signal comprising consecutive binary transitions, with an ideal time interval between two consecutive binary transitions, the time interval having been modified to a precompensated time interval; the apparatus comprising: a. timing means (302) for timing the precompensated time interval to generate a numerical time; b. comparator means (312) for comparing the numerical time to a plurality of numerical time ranges (310), each numerical time range including a corresponding compensation calculation (314); c. selection means (314) for selecting from the plurality of numerical time ranges the numerical time range which includes the numerical time; d. generating means (318) operative to perform the compensation calculation corresponding to the selected numerical time range and to generate a compensated numerical time; the generating means being adapted to wait an amount of time corresponding to the compensated numerical time and to generate a binary waveform transition.
References Cited (Backward Citations)
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