Patent ID: 6014348
Filing Date: 2000-01-11
Classification: G11B

Abstract:
A method of reading written information from a magneto-optical writing media by using a reading apparatus generating a clock signal with a constant period, comprising the steps of:detecting a first electrical signal with a first level value from a written mark of the magneto-optical writing media by irradiating a reading beam spot in synchronization with the clock signal on the written mark;obtaining a difference signal by comparing, when said first electrical signal with said first level value is shifted to a second electrical signal with a second level value, the second electrical signal with the second level value with the second electrical signal with the second level value detected in next sequence;obtaining a phase control signal of said clock signal from said difference signal;controlling a phase of said clock signal according to said phase control signal in order for the reading beam spot to be exactly irradiated on said written mark.