Recording equalizer and magnetic recording/reproducing apparatus using the equalizer
1. Field of the Invention A recording equalizer for correcting a write timing of magnetic information when the magnetic information is recorded with a magnetic recording head on a magnetic recording medium, includes a buffer for storing a recording object bit and bits before and after the recording...
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Main Authors | , , , |
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Format | Patent |
Language | English |
Published |
12.03.2002
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Online Access | Get full text |
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Abstract | 1. Field of the Invention
A recording equalizer for correcting a write timing of magnetic information when the magnetic information is recorded with a magnetic recording head on a magnetic recording medium, includes a buffer for storing a recording object bit and bits before and after the recording object bit and a calculator for calculating a precompensation parameter using the bits stored in the buffer. The calculator calculates the preconpensation parameter of the recording object bit by linearly adding influence of a transition existing at a two-previous bit of the recording object bit, influences of a transition at a one-previous bit of the recording object bit and influences of a transition existing at one-following bit of the recording object bit and further adding an offset. The offset is determined to a value such that a write timing of the magnetic information is corrected always in a delaying direction. |
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AbstractList | 1. Field of the Invention
A recording equalizer for correcting a write timing of magnetic information when the magnetic information is recorded with a magnetic recording head on a magnetic recording medium, includes a buffer for storing a recording object bit and bits before and after the recording object bit and a calculator for calculating a precompensation parameter using the bits stored in the buffer. The calculator calculates the preconpensation parameter of the recording object bit by linearly adding influence of a transition existing at a two-previous bit of the recording object bit, influences of a transition at a one-previous bit of the recording object bit and influences of a transition existing at one-following bit of the recording object bit and further adding an offset. The offset is determined to a value such that a write timing of the magnetic information is corrected always in a delaying direction. |
Author | Maruyama, Yohji Yoshida, Kazuetsu Igarashi, Masukazu Saitoh, Ikuo |
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References | (08096312) 19960400 (08203006) 19960800 "Error Rate Performance of Experimental Gigabit per Square inch Recording Components", by Thomas D. Howell et al, IEEE Transactions on Magnetics, vol. 26, No. 5, Sep., 1990. Hashimoto (4885645) 19891200 Igarashi et al. (6212024) 20010400 |
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Snippet | 1. Field of the Invention
A recording equalizer for correcting a write timing of magnetic information when the magnetic information is recorded with a magnetic... |
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Title | Recording equalizer and magnetic recording/reproducing apparatus using the equalizer |
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