Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent
1986-09-08
1987-07-07
Richardson, Robert L.
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
250201, 369 53, 369 45, G11B 700
Patent
active
046791817
ABSTRACT:
A disc drive control system for controlling the drive of a disc carrying a binary digital signal incluring a clock information of a predetermined frequency wherein the digital signal includes an information signal portion of an information to be recorded and synchronizing signal portions which includes successive maximum periods of inversion. The system includes a detection means for detecting the period of the successive maximum periods of inversion of the synchronizing signal and producing a detection signal, and a control means for producing a control signal of disc drive means which control signal is produced in accordance with the detection signal prior to a period in which the control signal is produced in accordance with a reproduced clock signal, whereby eliminating a problem that the driving speed of the disc may be controlled in accordance with an erroneously reproduced clock signal.
REFERENCES:
patent: 4097730 (1978-06-01), Korpel
patent: 4371899 (1983-02-01), Ceshkovsky et al.
patent: 4423498 (1983-12-01), Kimura et al.
patent: 4466089 (1984-08-01), Wachi
patent: 4495474 (1985-01-01), Nishikawa et al.
patent: 4539666 (1985-09-01), Wachi
Pioneer Electronic Corporation
Richardson Robert L.
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