08089845 cites 16 patents.

The generation of a pseudo-lock is prevented in a JFB offset compensator whose use has been conventionally limited due to a tendency to generate the pseudo-lock, and performance degradation of a PLL and a Viterbi decoder is suppressed. A means for monitoring an offset of a read signal is provided independently from the JFB offset compensator. With this configuration, the generation or a possibility of the generation of the pseudo-lock can be detected to reset an integrator. In order to reduce the influence of a large sporadic offset triggering the pseudo-lock, there may also be provided a limitter for limiting the absolute value of an offset signal inputted to the integrator or a limitter for limiting the absolute value of an offset compensation signal.

Title
Offset compensator and optical disc drive using the same
Application Number
12/271093
Publication Number
8089845 (B2)
Application Date
November 14, 2008
Publication Date
January 3, 2012
Inventor
Atsushi Kikugawa
Tokyo
JP
Agent
Mattingly & Malur PC
Assignee
Hitachi LG Data Storage
JP
Hitachi
JP
IPC
G11B 7/00
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