Dynamic magnetic information storage or retrieval – General processing of a digital signal – Data clocking
Patent
1997-04-25
2000-08-22
Loomis, Paul
Dynamic magnetic information storage or retrieval
General processing of a digital signal
Data clocking
360 61, 360 75, G11B 509, G11B 1512, G11B 2102
Patent
active
061081515
ABSTRACT:
A sampled amplitude read channel is disclosed for reading data recorded on a disk storage medium by detecting an estimated binary sequence from a sequence of discrete time sample values generated by sampling pulses in an analog read signal from a read head positioned over the disk storage medium. The read channel comprises a sampling device, such as an analog-to-digital converter (A/D), for sampling the analog read signal to generate the discrete time sample values and for sampling at least one other auxillary analog input signal, such as a servo control signal. In this manner, performance characteristics of the read channel can be measured, such as the driving current applied to the servo control voice coil motor (VCM), without requiring additional hardware.
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Behrens Richard T.
Bliss William G.
Dudley Trent O.
Hein Jerrel P.
Reed David E.
Cirrus Logic Inc.
Loomis Paul
Neal Regina Y.
Sheerin Howard H.
Shifrin Dan
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