Patent ID: 7218584
Filing Date: 2007-05-15
Classification: G11B,H03L

Abstract:
1. An information recording and reproducing apparatus of an optical disc comprising a recording track wobbled by a predetermined frequency, comprising: an optical pickup which irradiates a laser light on the optical disc and receives the laser light reflected by the optical disc to output an electric signal corresponding to the laser light; a push-pull signal generating unit which includes a sample-hold unit for executing sample-hold process, and generates a non-sample-hold push-pull signal and a sample-hold push-pull signal from the electric signal, the push-pull signal including a wobble signal component of the recording track; a recording clock generating unit which generates a recording clock synchronized with the wobble signal based on the sample-hold push-pull signal during recording and based on the non-sample-hold push-pull signal during reproduction; and a phase adjusting unit which adjusts phases of the non-sample-hold push-pull signal and the sample-hold push-pull signal.