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
Dynamic facsimile transcoding in a unified messaging platform
Scanning transmission electron microscope and axial adjustment method thereof
Metal-containing compositions and method of making same
Linear jet ionizer
Spatially pre-processed target-to-jammer ratio weighted filter and method thereof
System and method for stranded file opens during disk compression utility requests
Semiconductor memory device and method for driving the same
  Randomly Featured Patents
Flow controlling apparatus
Diffusing baffle applying sprout inhibitor to stored potatoes
Convertible seats for transport
Lifting and positioning device
Windchimes
Synthetic plastics article manufacturing system
Pipe spinner assembly
Anti-theft device for vehicles
Electrochemical battery
High temperature pressure sensor element, particularly for measuring pressures inside jet engines, method for the production thereof and component for jet engines