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
Ionic compound, anti-static pressure-sensitive adhesive and polarizer comprising the same
Digital microwave radio link with adaptive data rate
Techniques for generating and displaying a visual flow of user content through a social network
Markers of acute myeloid leukemia stem cells
Variety corn line NPAA2675
Plants and seeds of hybrid corn variety CH367819
Fixture for camera attachments
  Randomly Featured Patents
Wrist watch
Spacers for field emission displays
Stable compositions of water-soluble amino-and alkenyl-functional organosiloxanes, process for their preparation and their use
Duplex spool for an open face spinning reel
Cellulose pulp particle and product to promote fluid flow
Analysis of mutually exclusive conflicts among redundant devices
Determining whether a wireless access node should retransmit data packets based on the condition of a reverse wireless link
Processing device and processing method
Electromechanical programmer assembly
Externally managed file versions