Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1993-09-15
1994-10-25
Psitos, Aristotelis
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360 7307, G11B 5584
Patent
active
053594738
ABSTRACT:
A digital tracking device for use in a helical scan type magnetic recording and reproducing apparatus with an ATF system utilizing four-frequency pilot signals includes a sampling circuit which samples reproduced pilot signals with a frequency of a predetermined one of the four pilot signal frequencies, digital filter circuits for deriving aliasing signal components of the predetermined pilot signal produced by the sampling circuits, and a feedback circuit for feeding back a tracking error signal corresponding to signal levels of the aliasing signal components derived by the digital filter circuits to a magnetic tape drive system of the recording and reproducing apparatus.
REFERENCES:
patent: 4679099 (1987-07-01), Edakubo
patent: 4816940 (1989-03-01), Nagasawa et al.
patent: 4956725 (1990-09-01), Kozuki et al.
patent: 4972190 (1990-11-01), Primeau et al.
patent: 4999722 (1991-03-01), Kozuki et al.
patent: 5251079 (1993-10-01), Yamada et al.
Lathi "Modern Digital and Analog Communication Systems" 1989 pp. 81-82.
Itoh et al. "Multi-Track PCM Audio Utilizing 8mm Video System" Aug. 1985 pp. 438-444.
Widrow et al. "Adaptive Noise Cancelling: Principles and Applications" Dec. 1975 pp. 1692-1716 Proceedings of IEEE.
U. Tietze et al., Halbleiter-Schaltungstechnik, Springer-Verlag, Berlin, 1989, pp. 791-798 (no translation).
Kaniwa Kouji
Nakamoto Toshio
Nishijima Hideo
Ono Koichi
Hitachi , Ltd.
Psitos Aristotelis
Wilson James T.
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