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
Recovering a database to any point-in-time in the past with guaranteed data consistency
Image forming apparatus having exhaust fan
Acoustic reconfiguration devices and methods
Contactless electrical connector for an induction sensor, and sensor including such a connector
Matching a usage history to a new cloud
Interactivity model for shared feedback on mobile devices
Externally gapped line arrester
  Randomly Featured Patents
Chair
Micro-fluidic device
Embossed nonwoven fabric
Hydraulic power mechanism with control device actuator
Supporting disk
Elastic coupling and elastomeric element therefor
Transferring and accumulating device for sliced comestible products
System and method for managing energy consumption in a compute environment
Apparatus and method for determining the size of an object during endoscopy
Optical sensing device for detecting optical features of valuable papers