Title:
OPTICAL DISK DRIVE AND ITS INFORMATION RECORDING METHOD
Document Type and Number:
Japanese Patent JP3756917
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To reproduce ADIP information in the most preferable state in an optical disk drive and an information recording method using a wobble signal detector circuit.
SOLUTION: There are formed a first route where a wobble signal passes a band-pass filter (BPF45), and a second route where the wobble signal passes a high-pass filter (HPF46) and a low-pass filter (LPF47). A phase difference detecting means (phase difference detector 65 a, b) which detects the phase difference between respective I/O signals of the first and second routes both inputted with the wobble signals, and a adjusting means (delay circuit 50) to adjust phases of the signals passing the first and second routes according to the detected phase differences to make them agree are arranged.
Inventors:
Kuniaki Arai
Application Number:
JP2004139716A
Publication Date:
March 22, 2006
Filing Date:
May 10, 2004
Export Citation:
Assignee:
株式会社リコー
International Classes:
G11B7/005; G11B20/10; (IPC1-7): G11B7/005; G11B20/10
Domestic Patent References:
| JP2000195190A |
Attorney, Agent or Firm:
Tadahiko Ito