Servo control method and servo control circuit, and optical disk device having the same servo control circuit

The present invention discloses a servo control method and servo control circuit, and optical disc device having the same servo control circuit. A servo error signal and a defect detection signal are generated from an output signal of a pickup unit, and a servo control signal and a hold signal are generated from the servo error signal. When changing to either a servo control signal or a hold signal based on the defect detection signal generated in a defect detection signal generation circuit, so as to perform servo control of the pickup unit, a servo error signal in a predetermined time before a timing changing from the servo control signal to the hold signal is used as the servo error signal for generating the hold signal. The defect detection signal generation circuit has a peak holding circuit having different tracking capabilities.