Phase sensor

Details Phase sensor Phase sensor

1980-04-11

1981-10-20

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of equalizing

360 46, G11B 545, G11B 509

Patent

active

042964458

ABSTRACT:
In a magnetic tape recording/playback system, there has here been provided a phase sensor circuit wherein a recorded square wave signal, when played back, produces a signal which includes a predominant first and third harmonic. A filtered sample of the relative amplitude of the resulting peaks is compared and a difference signal is indicative of a phase shift error. That signal may then be used to effect a control to correct the phase shift error.

REFERENCES:
patent: 3436490 (1969-04-01), Roelots
patent: 3864734 (1975-02-01), Gish
patent: 4244008 (1981-01-01), Holt

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