Patent ID: 8085633
Filing Date: 2011-12-27
Classification: G11B

Abstract:
1. An optical disc drive comprising: a laser light source; a light source drive that pulse-drives the laser light source; an optical system that irradiates an optical disc with laser light emitted from the laser light source; a section that converts optical information to an electrical pulsed read signal, the optical information being optically read from the optical disc when the optical disc is irradiated with the laser light; a section that converts the pulsed read signal to a sampled pulsed read signal; a section that synchronizes the pulse drive signal of the laser light source with a channel clock; a section that changes the phase of the sampled pulsed read signal relative to a channel clock signal; a section that decodes the sampled pulsed read signal to obtain data recorded on the optical disc; and wherein a pulse drive frequency of the laser light source is not higher than a channel clock frequency and is at least two times the frequency of a maximum frequency component in the information optically read from the optical disc.