Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent
1992-10-26
1994-06-28
Sniezek, Andrew L.
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
369 4434, G11B 700
Patent
active
053253469
ABSTRACT:
A track traverse detecting circuit for generating a count-out signal with precision in addressing high-speed traverse operations appropriately. The circuit includes a tracking zero cross (TZC) signal generating circuit, two delay circuits, an edge detecting circuit and a mirror signal generating circuit. The TZC signal generating circuit generates a TZC signal at the zero cross timing of a tracking error signal. The TZC signal is then delayed by one of the two delay circuits by an appropriate time in accordance with the traverse speed for access to a desired track. Edges of the delayed TZC signal are detected by the edge detecting circuit. A mirror signal output by the mirror signal generating circuit is sampled at the timing of the detected TZC signal edges. The output of the sampling is provided accurately as the count-out signal.
REFERENCES:
patent: 5095394 (1992-03-01), Yanagihara
patent: 5157645 (1992-10-01), Takahara et al.
patent: 5221896 (1993-06-01), Kobayashi et al.
Patent Abstracts of Japan, vol. 9, No. 62 (P-342), Mar. 19, 1985 & JP-A-59 195 343 (Olympus), Nov. 6, 1984.
Patent Abstracts of Japan, vol. 8, No. 42 (P-256), Feb. 23, 1984 & JP-A-58 194 170 (Denshi Keisanki Kihon Gijutsu Kenkiyuu Kumiai), Nov. 12, 1983.
Hasegawa Kiyomasa
Noda Hidenobu
Sasaki Takeshi
Sammut Charles P.
Sniezek Andrew L.
Sony Corporation
Tran Thang V.
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