Speed-switchable readback signal equalization and direct-current

Details Speed-switchable readback signal equalization and direct-current Speed-switchable readback signal equalization and direct-current

1976-08-16

1978-06-06

Lucas, Jay P.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of equalizing

360 41, G11B 545

Patent

active

040939650

ABSTRACT:
Apparatus for recovering signals read back from a recording medium at different relative recording medium speeds have speed-switchable equipment for equalizing readback signals over frequency bands having different peak to-bandedge roll-off regions for different relative recording medium speeds. High-frequency equalization means in the speed-switchable equipment equalize readback signals in the peak-to-bandedge roll-off regions by providing speed-switchable frequency peaking characteristics and speed-switchable cut-off frequency characteristics and in company with each other shift the frequency peaking characteristics and cut-off frequency characteristics to the different peak-to-bandedge roll-off regions for different relative recording medium speeds.

REFERENCES:
patent: 3339192 (1967-08-01), Zeller
patent: 3436490 (1969-04-01), Roelofs
patent: 3441921 (1969-04-01), Jacoby
patent: 3465321 (1969-09-01), Reisfeld
patent: 3864734 (1975-02-01), Gish

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