Error estimation circuit and method using an analog-to-digital c

Details Error estimation circuit and method using an analog-to-digital c Error estimation circuit and method using an analog-to-digital c

1997-03-18

2000-11-21

Loomis, Paul

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Head amplifier circuit

360 65, G11B 509, G11B 5035

Patent

active

061511781

ABSTRACT:
A read channel (18) is provided for use in a mass storage system. The read channel (18) includes a plurality of circuit modules and an error estimation circuit (50). The plurality of circuit modules receive an analog data signal from a disk/head assembly (12) and condition the signal to provide a digital data signal. The error estimation circuit (50) receives an analog signal from one of the plurality of circuit modules and analyzes the analog signal. The error estimation circuit (50) provides digital error signal (94) and digital level estimation signal (96) as a result.

REFERENCES:
patent: 5341249 (1994-08-01), Abbott et al.
patent: 5400029 (1995-03-01), Kobayashi
patent: 5602503 (1997-02-01), Muto
patent: 5847891 (1998-12-01), Ohmori et al.
Richard C. Schneider, "Sequence (Viterbi-Equivalent) Decoding," IEEE Transactions on Magnetics, vol. 24, No. 6, Nov. 1988, pp. 2539-2541.
J.D. Coker, R.L. Galbraith, G.J. Kerwin, J.W. Rae, P.A. Ziperovich, "Implementation of PRML in a Rigid Disk Drive," IEEE Transactions on Magnetics, vol. 27, No. 6, Nov. 1991, pp. 4538-4543.
H. Kobayashi and D.T. Tang, "Application of Partial-response Channel Coding to Magnetic Recording Systems," IBM J. Res. Develop., Jul. 1970, pp. 368-375.
Kenneth Abend and Bruce D. Fritchman, "Statistical Detection for Communication Channels with Intersymbol Interference," Proceedings of the IEEE, vol. 58, No. 5, May 1970, pp. 779-785.
G. David Forney, Jr., "Maximum-Likelihood Sequence Estimation of Digital Sequences in the Presence of Intersymbol Interference," IEEE Transactions on Information Theory, vol. IT-18, No. 3, May 1972, pp. 363-378.
G. David Forney, Jr., "The Viterbi Algorithm," Proceedings of the IEEE, vol. 61, No. 3, Mar. 1973, pp. 268-278.
Lyle J. Fredrickson, "Viterbi Detection of Matched Spectral Null codes for PR4 Systems," IEEE Transactions on Magnetics, vol. 28, No. 5, Sep. 1992, pp. 2889-2891.
K. Chopra and D.D. Woods, "A Maximum Likelihood Peak Detecting Channel," IEEE Transactions on Magnetics, vol. 27, No. 6, Nov. 1991, pp. 4819-4821.
Arvind M. Patel, "A New Digital Signal Processing Channel for Data Storage Products," IEEE Transactions on Magnetics, vol. 27, No. 6, Nov. 1991, pp. 4579-4584.
Gottfried Ungerboeck, "Adaptive Maximum-Likelihood Receiver for Carrier-Modulated Data-Transmission Systems," IEEE Transactions on Communications, vol. Com-22, No. 5, May 1974, pp. 624-636.
Peter Kabal and Subbarayan Pasupathy, "Partial-Response Signaling," IEEE Transactions on Communications, vol. Com-23, No. 9, Sep. 1975, pp. 921-934.
C.T. Beare, "The Choice of the Desired Impulse Response in Combined Linear-Viterbi Algorithm Equalizers," IEEE Transactions on Communications, vol. Com-26, No. 8, Aug. 1978, pp. 1301-1307.
R.A. Baugh, E.S. Murdock, and B.R. Natarajan, "Measurement of Noise in Magnetic Media," IEEE Transactions on Magnetics, vol. MAG-19, No. 5, Sep. 1983, pp. 1722-1724.
Hans Burkhardt and Lineu C. Barbosa, "Contributions to the Application of the Viterbi Algorithm," IEEE Transactions on Information Theory, vol. IT-31, No. 5, Sep. 1985, pp. 626-634.
Yaw-Shing Tang, "Noise Autocorrelation in Magnetic Recording Systems," IEEE Transactions on Magnetics, vol. MAG-21, No. 5, Sep. 1985, pp. 1389-1394.
Roger W. Wood and David A. Petersen, "Viterbi Detection of Class IV Partial Response on a Magnetic Recording Channel," IEEE Transactions on Communications, vol. COM-34, No. 5, May 1986, pp. 454-461.
Yaw-Shing Tang, "Noise Autocorrelation in High Density Recording on Metal Film Disks," IEEE Transactions on Magnetics, vol. MAG-22, No. 5, Sep. 1986, pp. 883-885.
C. Michael Melas, Patrick Arnett, Irene Beardsley, and Dean Palmer, "Nonlinear Superposition in Saturation Recording of Disk Media," IEEE Transactions on Magnetics, vol. MAG-23, No. 5, Sep. 1987, pp. 2079-2081.
Dean Palmer, Pablo Ziperovich, Roger Wood, and Thomas D. Howell, "Identification of Nonlinear Write Effects Using Pseudorandom Sequences," IEEE Transactions on Magnetics, vol. MAG-23, No. 5, Sep. 1987, pp. 2377-2379.
Roger Wood, "Jitter vs. Additive Noise in Magnetic Recording: Effects on Detection," IEEE Transactions on Magnetics, vol. MAG-23, No. 5, Sep. 1987, pp. 2683-2685.
H.K. Thapar and A.M. Patel, "A Class of Partial Response Systems for Increasing Storage Density in Magnetic Recording,"IEEE Transactions on Magnetics, vol. MAG-23, No. 5, Sep. 1987, pp. 3666-3668.
Yinyi Lin and Jack K. Wolf, "Combined ECC/RLL Codes," IEEE Transactions on Magnetics, vol. 24, No. 6, Nov. 1988, pp. 2527-2529.
Catherine A. French, Anthony D. Weathers, and Jack Keil Wolf, "A Gereralized Scheme for Generating and Detecting Recording Channel Output Waveforms with Controlled Pulse Polarity," IEEE Transactions on Magnetics, vol. 24, No. 6, Nov. 1988, pp. 2530-2532.
Richard C. Schneider, "Write Equalization for Generalized (d,k) Codes," IEEE Transactions on Magnetics, vol. 24, No. 6, Nov. 1988, pp. 2533-2535.
Michael Melas, Patrick Arnett, and Jaekyun Moon, "Noise in a Thin Metallic Medium: The Connection with Nonlinear Behaviour," IEEE Transactions on Magnetics, vol. 24, No. 6, Nov. 1988, pp. 2712-2714.
Jaekyun J. Moon and L. Richard Carley, "Partial Response Signaling in a Magnetic Recording Channel," IEEE Transactions on Magnetics, vol. 24, No. 6, Nov. 1988, pp. 2973-2975.
F. Dollvo, R. Hermann, and S. Olcer, "Performance and Sensitivity Analysis of Maximum-Likelihood Sequence Detection on Magnetic Recording Channels," IEEE Transactions on Magnetics, vol. 25, No. 5, Sep. 1989, pp. 4072-4074.
Roger Wood, "New Detector for 1,k Codes Equalized to Class II Partial Response," IEEE Transactions on Magnetics, Vol. 25, No. 5, Sep. 1989, pp. 4075-4077.
J.W.M. Bergmans, S. Mita, and M. Izumita, "Characterization of Digital Recording Channels by Means of Echo Cancellation Techniques," IEEE Transactions on Magnetics, vol. 25, No. 5, Sep. 1989, pp. 4078-4080.
Yinyi Lin, "An Estimation Technique for Accurately Modelling the Magnetic Recording Channel Including Nonlinearities," IEEE Transactions on Magnetics, vol. 25, No. 5, Sep. 1989, pp. 4084-4086.
Anthony D. Weathers, Catherine A. French, and Jack Keil Wolf, "Results on `Controlled Polarity` Modulation and Coding," IEEE Transactions on Magnetics, vol. 25, No. 5, Sep. 1989, pp. 4090-4092.
Catherine A. French, "Distance Preserving Run-Length Limited Codes," IEEE Transactions on Magnetics, vol. 25, No. 5, Sep. 1989, pp. 4093-4095.
Lyle J. Fredrickson and Jack Keil Wolf, "Error Detecting Multiple Block (d,k) Codes," IEEE Transactions on Magnetics, vol. 25, No. 5, Sep. 1989, pp. 4096-4098.
Roger Wood, "Enhanced Decision Feedback Equalization," IEEE Transactions on Magnetics, vol. 26, No. 5, Sep. 1990, pp. 2178-2180.
Thomas D. Howell, Donald P. McCown, Thomas A. Diola, Yaw-shing Tang, Karl R. Hense, Ralph L. Gee, "Error Rate Performance of Experimental Gigabit Per Square Inch Recording Components," IEEE Transactions on Magnetics, vol. 26, No. 5, Sep. 1990, pp. 2298-2302.
Pantas Sutardja, "A Post-Compensation Scheme for Peak-Detect Channel," IEEE Transactions on Magnetics, vol. 26, No. 5, Sep. 1990, pp. 2303-2305.
L.L. Nunnelley, M.A. Burleson, L.L. Williams, and I.A. Beardsley, "Analysis of Asymmetric Deterministic Bitshift Errors in a Hard Disk File," IEEE Transactions on Magnetics, vol. 26, No. 5, Sep. 1990, pp. 2306-2308.
H.K. Thapar, N.P.Sands, W.L. Abbott, and J.M. Cioffi, "Spectral Shaping for Peak Detection Equalization," IEEE Transactions on Magnetics, vol. 26, No. 5, Sep. 1990, pp. 2309-2311.
Lyle J. Fredrickson, "Coding for Maximum Likelihood Detection on a Magnetic Recording Channel," IEEE Transactions on Magnetics, vol. 26, No. 5, Sep. 1990, pp. 2315-2317.
Lyle J. Fredrickson, "A (D,K,C) = (0,3,5/2) Rate 8/10 Modulation Code," IEEE Transactions on Magnetics, vol. 26, No. 5, Sep. 1990, pp. 2318-2320.
R. Hermann, "Volterra Modeling of Digital Magnetic Saturation Recording Channels," IEEE Transactions on Magnetics, vol. 26, No. 5, Sep. 1990, pp. 2125-2127.
Roger Wood, Mason Williams, and John Hong, "Considerations for High Data Rate Recording with Thin-Film Heads," IEEE Transactions on Magnetics, vol. 26, No. 6, No

Affiliated with

Also associated with

Rating

Error estimation circuit and method using an analog-to-digital c does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Error estimation circuit and method using an analog-to-digital c, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Error estimation circuit and method using an analog-to-digital c will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1263674