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
Content display monitor
Changing sound alerts during a messaging session
Methods, systems, and physical computer storage media for processing a plurality of input/output request jobs
Fluorescent dyes, fluorescent dye kits, and methods of preparing labeled molecules
Method and system for blocking hazardous information
Use of beta-adrenoceptor antagonists for the manufacture of a medicament of the treatment of disorders of the outer retina
Extension of physical downlink control channel coverage
  Randomly Featured Patents
Support and anchoring mechanism for membranes in selectively responsive field effect devices
Stress relieving gel handle brush
Beverage container
Optical transmission apparatus and optical attenuation amount control method
Braking circuit provided with antilocking apparatus
Card reader device for a cell phone and method of use
Brake pressure control device
Bulk vertical window package
Control circuit for engine speed governor
Coating composition