Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1984-04-05
1987-02-24
Cardillo, Raymond F.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360 77, G11B 2108, G11B 2110
Patent
active
046461752
ABSTRACT:
Apparatus and method for decoding of transducer head-positioning information which has been recorded on data-storage media, in particular magnetic tape, and for use of the decoded information to position a transducer head, wherein the transducer head reads the recorded information and its output signals are sampled at predetermined times to determine their magnitude and a digital representation of such magnitude is obtained by timing an interval during which a reference source increases at a known rate from a first value to a second value whose difference corresponds to the detected magnitude of the transducer output signals. The timed interval is outputted in the form of a digital count value which is thus representative of the head-positioning information read out from the data storage media, and the digital signal provided by such count value is then used in positioning, or repositioning, the transducer head in a representative manner.
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IBM TDB, vol. 22, No. 6, "Digital Sector Servo System" Pennington et al., 11/79, pp. 2476-2481.
IBM TDB, vol. 19, No. 4, "Head-to-Track Synchronizing Mechanism for Magnetic Disks" Porter et al., 9/76, pp. 1393-1395.
EDN, vol. 23, No. 9, "Standard 3M Recording Techniques Could Spur Low Cost .mu.C Use" Kramer, 5/78, pp. 75-81.
Lum Francis
Sokolik Edmund L.
Cardillo Raymond F.
Garland Steven R.
Irwin Magnetic Systems, Inc.
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