Dynamic magnetic information storage or retrieval – General processing of a digital signal – Data clocking
Patent
1994-07-26
1998-04-14
Psitos, Aristotelis M.
Dynamic magnetic information storage or retrieval
General processing of a digital signal
Data clocking
360 29, 360 40, 341 53, G11B 509, G11B 502
Patent
active
057399697
ABSTRACT:
A storage system for storing information on a magnetic media is embodied within a conversion device. The system is operable to store data within a bit cell by receiving data from a controller board (14), which data is generated by a Central Processing Unit (CPU) (52). This data is convened from an ordinary Modified Frequency Modulation (MFM) format received on a bus (32) and then convened to a Super High Density (SHD) data format. In the SHD format, a counter is provided for counting down from an initial starting time corresponding to a reference pulse (102) to an end count value corresponding to the value of a data word. The time between the reference pulse and the end of count value constitutes the length of time from the beginning of the bit cell to the position in the bit cell at which a data pulse is recorded. During a decode operation, i.e. a Read operation, it is only necessary to determine the position of the data pulse within the bit cell with a counter that counts from the predetermined reference pulse to the position of the detected data pulse. This corresponds to a data value. Therefore, a multiple bit data word can be encoded within a given bit cell.
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Inwave Technologies, Inc.
Neal Regina Y.
Psitos Aristotelis M.
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