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
Profile-based user access to a network management system
Measurement and uses of oxidative status
Incrementally increasing deployment of gateways
Method for manufacturing thin film transistor and method for manufacturing display device
Video-recording reservation management apparatus, method, program, and system
Liquid crystal shutter glasses
Current collector for lead acid battery
  Randomly Featured Patents
Rapid transfer function determination for a tracking filter
System to detect protein-RNA interactions
Texture reproduction system and method and chroma correction system and method for presence enhancement
Thermal asperity compensation in perpendicular recording
Computer with intergrated telephone
Treating carbonaceous matter with hot steam
Semiconductor device
Digital processing of sensor signals for reading binary storage media
D-mannitol derivatives as HIV aspartyl protease inhibitors
Low conversion rate digital dispersion compensation