Design methodology for high-density read equalization

Richard C. Schneider

doi:10.1117/12.230057

15 January 1996 Design methodology for high-density read equalization

Richard C. Schneider

Proceedings Volume 2604, High-Density Data Recording and Retrieval Technologies; (1996) https://doi.org/10.1117/12.230057
Event: Photonics East '95, 1995, Philadelphia, PA, United States

Abstract

As magnetic recording linear densities increase, more bits are packed per inch along the individual tracks. The resulting high linear densities result in read signals that overlap each other. This is called inter symbol interference or ISI. The distortions in read signal shape due to ISI can be corrected by a linear electronic filter on the read side. This filter is called a read- equalizer. The read equalizer function is not unlike an audio equalizer that enhances audio performance at certain frequencies, or an optical lens that improves visual clarity by correcting for distortions of the human eye. This paper outlines an organized approach to the design of real equalizers used in high density digital magnetic recording on either tape or disks. This approach is also applicable to optical disk or tape applications, and in general to any digital data communication system.

Citation Download Citation

Richard C. Schneider "Design methodology for high-density read equalization", Proc. SPIE 2604, High-Density Data Recording and Retrieval Technologies, (15 January 1996); https://doi.org/10.1117/12.230057

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