Dynamic magnetic information storage or retrieval – General processing of a digital signal – Data clocking
Patent
1997-05-27
1998-12-22
Levy, Stuart S.
Dynamic magnetic information storage or retrieval
General processing of a digital signal
Data clocking
360 48, G11B 504
Patent
active
058525246
ABSTRACT:
In a disc storage system employing multiple recording heads to increase throughput by providing simultaneous access through multiple data streams, a sampled amplitude read channel is disclosed for detecting, in parallel, estimated data sequences from the read signals associated with each data stream. Timing recovery in the read channel is implemented through interpolation, that is, by asynchronously sampling the analog read signals and interpolating to synchronous sample values. In this manner, a frequency synthesizer can generate a single reference clock for clocking operation of all the discrete time circuitry, thereby eliminating noise caused by multiple clocks as well as simplifying diagnostics. Furthermore, interpolated timing recovery avoids noise due to cross-talk between voltage controlled oscillators (VCOs) that would likely occur in a conventional synchronous sampling timing recovery design. A significant advantage is that the read channel can reside in a single integrated circuit.
REFERENCES:
patent: 4833551 (1989-05-01), Song
patent: 5146325 (1992-09-01), Ng
patent: 5177652 (1993-01-01), Yamaguchi et al.
patent: 5261058 (1993-11-01), Squires et al.
patent: 5293282 (1994-03-01), Squires et al.
patent: 5341351 (1994-08-01), Ng
patent: 5355486 (1994-10-01), Cornaby
patent: 5523901 (1996-06-01), Anderson et al.
patent: 5726818 (1998-03-01), Reed et al.
U.S. application No. 08/507621, Supino et al., filed Sep. 26, 1995.
U.S. application No. 08/751880, Behrens, filed Nov. 18, 1996.
Denny K. Miu, "Silicon Microactuators for Rigid Disk Drives," Data Storage, pp. 33-40, Jul./Aug. 1995.
Sorin G. Stan, "Twin-Actuators for Ultra-Fast Access in CD-ROM Systems," IEEE Transactions on Consumer Electronics, vol. 42, No. 4, pp. 1073-1084, Nov. 1996.
Glover Neal
Sheerin Howard H.
Cirrus Logic Inc.
Levy Stuart S.
Sheerin Howard H.
Shifrin Dan A.
Wamsley Patrick
LandOfFree
Sampled amplitude read channel for processing multiple data stre does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Sampled amplitude read channel for processing multiple data stre, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sampled amplitude read channel for processing multiple data stre will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2052261