Adaptive equalizer of recorded information reproducing apparatus

Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium

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369 54, G11B 700

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active

058703721

ABSTRACT:
To provide an adaptive equalizer of a recorded information reproducing apparatus capable of securing a desired waveform equalizing accuracy with a small circuit scale. The adaptive equalizer includes first delay means for delaying a read sample read and sampled from an optical recording medium by the first delay time shown below and successively outputting the resulting value, second delay means for further delaying the value output from the first delay means by the second delay time shown below and successively outputting the resulting value, third delay means for further delaying the value output from the second delay means by the second delay time and successively outputting the resulting value, fourth delay means for delaying the value output from the third delay means by the first delay time and successively outputting the resulting value, and an equalizer executes adaptive operations based on the read sample output from the first delay means and fourth delay means, input read sample, and a read sample output from the third delay means.

REFERENCES:
patent: 5442615 (1995-08-01), Ohsato et al.
patent: 5546367 (1996-08-01), Yoshimura et al.
patent: 5703855 (1997-12-01), Kirino et al.
patent: 5719847 (1998-02-01), Tateishi et al.

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