Signal processor for discriminating recording data

Details Signal processor for discriminating recording data Signal processor for discriminating recording data

1993-07-13

1995-06-13

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Head amplifier circuit

360 51, G11B 509, G11B 2710

Patent

active

054248825

ABSTRACT:
A signal processing circuit for discriminating recording data is formed by a detector circuit for detecting zero-cross points on an equalized waveform; a PLL for generating a clock at a rate twice the baud rate of a read signal by using the zero-cross timing as an input; a divider for dividing the output of the PLL to generate two baud rate clocks having different phases from each other; and a circuit for selecting one of the two clocks using the waveform of the read signal and for connecting the selected clock to discriminator and decoder circuits. The signal processing circuit also has a table for outputting therefrom a variable branch-metric value which is adaptively controlled using the output of an A/D convertor, internal data contained in the branch-metric table, or the output of the same.

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