TRACK ERROR SIGNAL GENERATOR, TRACK ERROR SIGNAL GENERATION METHOD, CONTROLLER, AND CONTROL METHOD

摘要

A tracking error signal generating apparatus having an inexpensive and simple configuration for a disc-shaped information recording medium driven in conformity with a given system, such as the CAV system, CLV system or ZCLV system, is provided. The tracking error signal generating apparatus in accordance with the present invention comprises a reproduction portion of butputting the reproduction signal of pre-pits formed on the disc-shaped information recording medium; a clock pit signal detection portion of detecting a first clock pit signal from the reproduction signal; a first clock pit signal interval measurement portion of outputting the interval value between two adjacent first clock pit signals; a computation portion of calculating and outputting first and second wobble pit signal interval values nearly proportional to the interval value; first and second wobble pit signal detection portions of detecting the first and second wobble pit signals, respectively, on the basis of the first and second wobble pit signal interval values and the like; and a differential signal generation portion of generating the differential signal between the above-mentioned first and second wobble pit signals. <IMAGE>