Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Read signal processing circuit, read signal processing method, and optical disc drive










Image Number 10 for United States Patent #7446685.

The present invention provides a read channel and a drive capable of suppressing deterioration in performance of a PLL and a Viterbi decoder by using a DC component eliminating means capable of higher-speed operation than hitherto. The location of an edge is determined by using differential of a read signal, and a DC component is detected from the midpoint level of the edge. Detection of a pseudo-edge due to a long mark or space signal is prevented by limiting the absolute value of a maximum or minimum of a differential coefficient when the location of the edge is determined from the differential coefficient of the read signal. Internal operation of a DC component detector is controlled according to the state of the PLL and the magnitude of the DC component.








 
 
  Recently Added Patents
Luminaire
Organoruthenium compound for chemical deposition and chemical deposition process using the organoruthenium compound
Composition for solubilizing tissue and cells comprising N-tetradecyl-N,N-dimethyl-3-ammonio-1-propanesulfonate and polyoxyethylene (10) cetyl ether
Structural display having adjustable mounting widths for use in a retail environment
Apparatus and method for sealing pipes and underground structures
Illumination device
Universal dental X-ray sensor holder
  Randomly Featured Patents
Industrial robot
Method for initiating a helium alarm particle detector in a dry etching system prior to initiation of the etching process
Combination flashing and mortar and debris collection device and system
Agricultural transporter
Cleaning system for a filling machine
Method of and apparatus for vertically positioning devices in glass forming chamber
Method of image registration in a web fed, multiple printing rotary press
[(1H-indazol-3-yl)methyl]phenols and (hydroxyphenyl)(1H-indazol-3-yl)methanones
Method for fabricating flash memory cell
Method and device for measuring intermodulation distortion