Disk reproducing apparatus having a disk diameter determining fu

Details Disk reproducing apparatus having a disk diameter determining fu Disk reproducing apparatus having a disk diameter determining fu

1995-06-29

1997-12-09

Young, W. R.

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 4428, G11B 700

Patent

active

056967446

ABSTRACT:
A reproducing head is moved by a moving stand along the diameter at a constant speed. At this time, an in-focus detecting circuit waits until the cancellation of the focus control. The time to the cancellation of the focus control is counted by a microprocessor. Based on the time, the microprocessor discriminates the radius of an information recorded disk.

REFERENCES:
patent: 4868805 (1989-09-01), Hanami et al.

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