Patent ID: 7113461

Claim:
A circuit for tracking error signal detection on an optical storage medium, the optical storage medium detecting the reflective beams form which through a plurality of photo detectors to generate a plurality of signals, thereby generating a first summing signal and a second summing signal in order to obtain a tracking error signal, the circuit comprising: a plurality of digitizers, for outputting the first summing signal and the second summing signal as a first digital summing signal and a second summing signal respectively, and outputting a third digital summing signal according to a third summing signal which is generated according to the first summing signal and the second summing signal; a delayer for generating a delay signal according to the third digital summing signal; and a plurality logic of comparators for outputting a first comparing signal after comparing the delay signal and the first digital summing signal, and a second comparing signal after comparing the delay signal and the second digital summing signal such that the tracking error signal is generated according to the first comparing signal and the second comparing signal.