Compact disk player having an intermediate memory storage device

Claim 1

A compact disk player comprising a pickup for reading data on a compact disk, a servo control device for controlling the pickup and a digital signal processing unit for processing the data on the compact disk read by said pickup in a digital form and generating a predetermined clock, wherein the improvement comprises: control means for generating first and second clocks, a plurality of addresses and a plurality of clock enable signals and controlling said servo control device upon sensing a focus error from said pickup, the first clock being active high under a normal condition, the second clock being active high upon sensing the focus error from said pickup; clock generation means for generating a reference clock; clock selection means for selecting one of the clocks from said digital signal processing unit and said clock generation means in response to the first and second clocks from said control means, said clock selection means selecting the predetermined clock from said digital signal processing unit under the normal condition and selecting the reference clock from said clock generation means when no data is outputted from said digital signal processing unit due to the focus error from said pickup; memory means for, alternately, storing data from said digital signal processing unit and outputting the stored data in response to the addresses and the clock enable signals from said control means and the selected clock from said clock selection means; and digital/analog conversion means connected to said control means for converting the data from said memory means into an analog signal under the control of said control means.