Abstract: An optical pickup tilt control module and a method for controlling a tilt value of an optical pickup to reduce the jitter value of a generated reproducing signal. The optical pickup tilt control module includes a reproducing signal generator, a jitter detector, a tilt controller and a tilt actuator. The reproducing signal generator receives a RF signal generated from the optical pickup and generates an EFM signal. The jitter detector receives the EFM signal and detects a jitter value of the EFM signal. The tilt controller generates optimum tilt control values during a correction stage and outputs a tilt control value according to a track position of reproduction data during an adjusting stage. The tilt actuator controls the tilt of the optical pickup according to the tilt control value.

Abstract: A central servo control system is used in an optical disc drive to control an optical pickup head. The optical at least includes a lens. The central servo control system includes a radio frequency (RF) amplifier, a sled motor, a tracking coil, and a central servo controller. The RF amplifier chip is coupled to the optical pickup head so as to receive the optical signal, which is amplified and processed so as to produce a RF data signal, a tracking error (Te) signal, and a central servo (Tcs) signal. The sled motor is used to hold the optical pickup head and move the optical pickup head to a desired position. The tracking coil located on the optical pickup head is used to move the lens to a designed position so as to allow the optical signal to be easily detected by the optical pickup head. The central servo controller receives the RF data signal, the Te signal, and the Tcs signal from the RF amplifier chip, and accordingly exports a tracking control signal to the tracking coil.