Patent ID: 6526006
Filing Date: 2003-02-25
Classification: G11B

Abstract:
A tracking error signal compensation device for removing an offset of a tracking error signal to be used for a tracking servo control for causing a radiation position of a light beam radiated by an optical pickup to follow to a track of a recording disk, the tracking error signal compensation device comprising:a track jump detection device that detects a track jump of the optical pickup; a detection device that detects the offset of the tracking error signal; and a removing device that removes the offset detected by the detection device from the tracking error signal, wherein the detection device and the removing device are carried out removal of the offset from the tracking error signal, when the track jump detection device detects the track jump of the optical pickup, wherein the detection device comprises: a low pass filter that extracts a direct current component and a low frequency component whose frequency is lower than a reference frequency from the tracking error signal, and generates a detection signal including the extracted direct current component and the extracted low frequency component; a determination device that determines whether or not a frequency of the tracking error signal is lower than a reference frequency; a holding device that generates a hold signal by holding the detection signal generated by the low pass filter, when the determination device determines that the frequency of the tracking error signal is lower than the reference signal; and an offset detection device that detects the offset of the tracking error signal by using the detection signal and the hold signal.