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
Imaging apparatus, control method thereof, and program
Multilayered ceramic electronic component and fabrication method thereof
Collaborative system for capture and reuse of software application knowledge and a method of realizing same
Device and method for unified codes
Device for maneuvering a vehicle using maneuvering moves using at least one trajectory
Methods and compositions for improving photodynamic therapy through administration of lipids
Firewall-tolerant voice-over-internet-protocol (VoIP) emulating SSL or HTTP sessions embedding voice data in cookies
  Randomly Featured Patents
Vinyl chloride polymer laminate
Solder flux composition
Computer-system processor-to-memory-bus interface having repeating-test-event generation hardware
Microwave electronic tube with an improved collector
Electric heater panel
Restraint device for recreational vehicles
Self-aligned contacts for semiconductor device
Apparatus to use fabric initialization to test functionality of all inter-chip paths between processors in system
Positive active material for rechargeable lithium battery and method of preparing same
Down-hole hammer