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
Automated measurement of concentration and/or amount in a biological sample
Electronic devices with voice command and contextual data processing capabilities
Video processing system and device with encoding and decoding modes and method for use therewith
Identification wristband
Fixing device and image forming apparatus
Systems and methods for assigning a template to an existing network configuration
Integrated circuit packaging system with laser hole and method of manufacture thereof
  Randomly Featured Patents
Sleeping bag with overlapping batts
2,4-pentadienoic acid derivatives having retinoid-like biological activity
Group control for elevators with double cars
Process for the preparation of 3,5-dimethylaniline (sym. m-xylidine)
Delayed release coated metal phosphide pesticides
Camera
Ink jet recording device and head holder with ink reserve section having a plurality of reserve grooves
Hanger
Apparatus and method for retrieving and/or communicating with downhole equipment
Node storage, deployment and retrieval system