| 摘要 |
PROBLEM TO BE SOLVED: To provide a carriage servo controller which allows the execution of the carriage servo control complying with a design value, is capable of decreasing the man-hours for design by an improvement in the degree of freedom in design, is capable of easily executing the desired carriage servo control and is adaptable to diversified applications. SOLUTION: This carriage servo controller has a preamplifier which forms a tracking error signal when the radial movement of a pickup o reproducing information from the tracks on an optical disk by a light beam is subjected to carriage servo control, a pulse forming section 27 which forms a pulse signal PS having a specified period corresponding to the moving accuracy of the pickup, a duty ratio control section 33 which forms a changed pulse signal PSS by changing the duty ratio of the pulse signal PS in accordance with the characteristics of the tracking error signal, a multiplier 28 which forms a carriage control signal CD in accordance with the changed pulse signal PSS and the tracking error signal and driver section which moves the pickup by impressing the formed carriage control signal CD to a carriage motor.
|
