Title:
NOISE ELIMINATION CIRCUIT AND METHOD
Document Type and Number:
Japanese Patent JP2004185692
Kind Code:
A
Abstract:
To provide a method or the like that improves the S/N of the wobble signal.
The method is provided with: a 180 degrees odd numbers shift means for outputting a 180 degrees shift signal, which is shifted by odd number times of 180 degrees with respect to the phase of an input signal; and a difference output means for outputting the difference between the input signal and the 180 degrees shift signal. Also, there are provided: a 360 degrees shift means for outputting a 360 degrees shift signal, which is shifted by integer multiples of 360 degrees with respect to the phase of the input signal; and a sum output means for outputting the sum of the input signal and the 360 degrees shift signal.
Inventors:
KURIHARA SHINJI
Application Number:
JP2002349363A
Publication Date:
July 02, 2004
Filing Date:
December 02, 2002
Export Citation:
Assignee:
SANYO ELECTRIC CO
International Classes:
G11B20/14; G11B7/005; G11B20/10; G11B20/24; (IPC1-7): G11B20/14; G11B7/005; G11B20/10
Attorney, Agent or Firm:
Kensuke Isshiki
Noritaka Harashima
Kurokawa Megumi
Noritaka Harashima
Kurokawa Megumi