Programmable signal equalizer

Details Programmable signal equalizer Programmable signal equalizer

1980-10-16

1983-02-01

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of equalizing

360 67, G11B 545, G11B 502

Patent

active

043719015

ABSTRACT:
A programmable signal equalizer uses a plurality of active RC circuits arranged to be controlled by a ladder resistor network. The resistor ladder circuits are selected by digital word signals representative of the selected magnetic tape speed to produce a signal equalization operation at each of the selected tape speeds. A combination of the ladder network circuits is selected by the digital bits in the digital word to form an active RC circuit producing a signal equalization correlated to a selected tape speed. Using an eleven line digital word code and an eleven RC ladder, eight master speed equalizations are selected as well as seven equalizations between the master speeds for a total of sixty-four equalization functions.

REFERENCES:
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patent: 3643013 (1972-02-01), Lemoine
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patent: 3867712 (1975-02-01), Harthill et al.
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patent: 4004236 (1977-01-01), Cardon et al.
patent: 4078215 (1978-03-01), Vinson
patent: 4110798 (1978-08-01), Miller et al.
patent: 4297730 (1981-10-01), Kadowaki et al.

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