| 摘要 |
PURPOSE: A digital servo controlling of an optical disk player apparatus is provided to prevent an error owing to a program change by changing only a data value of a memory without changing a control program of a controller even at a design change of an optical disk player and a part replacement. CONSTITUTION: A digital servo controller comprises a digital signal processor(21), a D/A convertor(22), a controller(24) and a motor/actuator driver(26).The digital signal processor(21) outputs a pulse width modulation signal in response to a radio frequency signal from an RF signal output(20), and demodulates EF-modulated data. The D/A convertor(22) converts the demodulated shift/write data into analog data. The controller(24) has a control program for controlling an overall system, and reads data with regard to a filter of each digital servo and control data to control the system so that an optical disk is reproduced by the control data. The motor/actuator driver(26) amplifies an output signal of the digital signal processor to make an actuator and a motor of an optical pickup being driven.
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