Compound pulse dimming circuitry for conditioning readback signa

Details Compound pulse dimming circuitry for conditioning readback signa Compound pulse dimming circuitry for conditioning readback signa

1985-12-31

1989-10-17

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of equalizing

360 45, G11B 5035

Patent

active

048751120

ABSTRACT:
A pulse signal conditioner filters and equalizes signal pulses representing digital data whether or not obtained from a magnetic recording device. Modified low pass filters filter the pulse signals and also derive and feed forward the second time derivative of the filtered pulse signals. The filtered pulse and the second time derivative thereof are combined to slim the pulse. Further slimming is provided by delay line equalizers having three paths. A first path for attenuating the pulse signals, a second path for delaying the pulse signals for a first delay, and a third path for delaying the pulse signals for a second delay and attenuation. Pulse signals from the three paths are combined to further slim the pulse.

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Schneider, Richard C., "An Improved Pulse-Slimming Method for Magnetic Recording", IEEE Transactions on Magnetics, vol. Mag-11, #5, Sep. 1975.

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