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
Video processing system and device with encoding and decoding modes and method for use therewith
Beaconing and superframe structure for millimeter wave wireless technologies
Transmission apparatus and network protection method
Apparatus and method for information processing, program, and recording medium
5-lipoxygenase-activating protein (FLAP) inhibitors
Test framework of visual components in a multitenant database environment
Selection of system parameters based on non-acoustic sensor information
  Randomly Featured Patents
Model vehicle with force-isolating drive mechanism
Sensing device
Image pickup apparatus capable of efficiently dissipating heat
Method and apparatus for reduction of fluid borne noise in hydraulic systems
Method and apparatus to improve performance in a multicarrier MIMO channel using the hadamard transform
Motor home front cap
High strength alloys
Graphene/(multilayer) boron nitride heteroepitaxy for electronic device applications
Writing pen
Igniter