RECORDING AND REPRODUCING DEVICE, CAPABLE OF RECORDING INFORMATION ON A RECORDING MEDIUM BY AN OPTICAL UNIT AND REPRODUCING THE INFORMATION

摘要

PURPOSE: A recording and reproducing device is provided to detect an amount of tilt, and to control a gain of a variable gain amplifier according to the detected amount of tilt, thereby realizing a stable information recording process even though intensity of an optical beam going toward a desired position on a recording medium is lowered by a big tilt. CONSTITUTION: A tracking error signal(TEAGCOUT) outputted to a variable gain amplifier(13) is inputted to a tracking control circuit(14) including a filter. The tracking control circuit(14) controls a position of a beam based on the amplified tracking error signal. The amplified tracking error signal is applied to a driving circuit(20) through the tracking control circuit(14), to drive a tracking coil of an actuator within an optical head(2). A current in accordance with a tracking error signal amplitude(TE) flows on the tracking coil, and an objective lens(3) is tracking-controlled such that an optical beam(4) can be located on a track of an optical disk(1).