Information regenerating apparatus

Details Information regenerating apparatus Information regenerating apparatus

1994-12-15

1996-09-03

Epps, Georgia Y.

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 48, 369 58, 369124, G11B 700

Patent

active

055530435

ABSTRACT:
In an information regenerating apparatus, recorded data constructed of a sector mark and a following header section having a plurality of data sets each having a pull-in pattern, an address mark and address information, is read out to form a regenerative signal which in turn is used to regenerate information. A phase-locked loop circuit in a signal synchronizing circuit, performs phase-synchronization with a regenerative signal at two different pull-in speeds. A speed indicating circuit, based on the counting of the number of clock pulses from a reference clock signal from a time of the generation of a sector mark detection signal showing the detection of the sector mark as a reference point, instructs the phase-locked loop circuit to set up a fast response speed every time the pull-in pattern appears on the regenerative signal, and instructs the phase-locked loop circuit to set up a slow response speed every time the pull-in pattern disappears from the regenerative signal.

REFERENCES:
patent: 5388087 (1995-02-01), Saiki et al.
patent: 5444685 (1995-08-01), Masood et al.
patent: 5448543 (1995-09-01), Mizokami et al.

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