G - Physics – 11 – B
Patent
G - Physics
11
B
352/32.2
G11B 19/247 (2006.01) G11B 19/28 (2006.01)
Patent
CA 1311051
ABSTRACT OF THE DISCLOSURE An apparatus for recording and reproducing information on and from an optical disk includes a first control for producing a first control signal for controlling the rotational speed of a rotational driving apparatus, on the basis of the detected radial position; a judging apparatus which judges whether or not the reproduced signals are reproduced from a recorded region of the optical disk; a second control for producing a second control signal for controlling the rotational speed of the rotational driving apparatus, on the basis of the signals reproduced from the disk; and a switch apparatus which switches the circuit so that the rotational driving apparatus is controlled by the first control signal when the reproduced signals are not reproduced from a non-recorded region, and controlled by the second control signal when the reproduced signals are reproduced from a recorded region.
573524
Deguchi Toshihisa
Fuji Hiroshi
Fujiwara Tsuneo
Iwaki Takashi
Kojima Kunio
G. Ronald Bell & Associates
Sharp Kabushiki Kaisha
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