Apparatus and method for reducing phase discontinuity between ne

Details Apparatus and method for reducing phase discontinuity between ne Apparatus and method for reducing phase discontinuity between ne

1998-08-06

2000-08-08

Huber, Paul W.

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

36912414, G11B 509

Patent

active

061011584

ABSTRACT:
An optical storage device includes a laser, a write clock generator and a read/write disc. The laser is modulated, and a readback signal is generated from laser light read back from the disc. The readback signal includes a first frequency component caused by the modulation of the laser and a second frequency component caused by information (e.g., data or a high frequency wobble) on the medium. Phase of the write clock is adjusted in accordance with a phase difference between the first and second frequency components. This adjustment allows new data to be written to the read/write disc without a phase discontinuity between the new data and data previously written to the disc.

REFERENCES:
patent: 5450381 (1995-09-01), Tsukamura et al.
patent: 5703853 (1997-12-01), Horigome et al.
patent: 5963518 (1999-10-01), Kobayashi et al.

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