METHOD AND DEVICE FOR GENERATING TRACKING ERROR SIGNAL, OPTICAL STORING DRIVE FIT TO THE SAME, AND LEAD-IN CONTROLLING METHOD USING THE SAME

摘要

PURPOSE: A method and a device for generating a tracking error signal, an optical storing drive fit to the same, and a lead-in controlling method using the same are provided to stably generate the tracking error signal even if a CD having a pit depth near a quarter lambda or a narrow track pitch is played. CONSTITUTION: The first and the second tracking error signal generator(1202,1204) respectively generate the first and the second tracking error signal by receiving a light detecting signal in a DPD(Differential Phase Detection) method through the first input terminal(1210). A comparator compares the output of the second tracking error signal generator with a predetermined threshold value. A selector selects/outputs the output of the first or the second tracking error signal generator through a selection terminal(1214) depending on a selection signal inputted through the second input terminal(1212) and a comparison result.