07483478 is referenced by 12 patents and cites 9 patents.

An optical disk read signal processing system for Blu-ray disc systems to ensure stable phase-locked locked operation even with a low signal-to-noise ratio. This system changes a loop configuration of a phase lock loop circuit according to the operating state, and utilizes a FIR equalizer for phase detection. This system attains a low error rate even when the signal-to-noise ratio of an input signal is low, and avoids pulse edges with low phase detection accuracy or signal pulse streams with a high possibility of being mistakenly detected as an edge in conventional methods, and also supports diverse types of input signals.

Title
Information read device and read signal processing circuit
Application Number
11/236801
Publication Number
7483478 (B2)
Application Date
September 28, 2005
Publication Date
January 27, 2009
Inventor
Hiroyuki Minemura
Kokubunji
JP
Atsushi Kikugawa
Tokyo
JP
Agent
Antonelli Terry Stout & Kraus
Assignee
Hitachi
JP
IPC
H03H 7/30
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