发明授权
US06304531B1 Disk reproducing device a disk reproducing method a disk rotation control method and a regenerative clock signal generating device
失效
磁盘重放装置，磁盘重放方法，磁盘旋转控制方法和再生时钟信号发生装置
- 专利标题： Disk reproducing device a disk reproducing method a disk rotation control method and a regenerative clock signal generating device
- 专利标题（中）： 磁盘重放装置，磁盘重放方法，磁盘旋转控制方法和再生时钟信号发生装置
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申请号： US09518850申请日： 2000-03-03
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公开(公告)号： US06304531B1公开(公告)日： 2001-10-16
- 发明人: Toshikazu Koudo , Masaharu Imura , Yoshiki Kuno , Yasuhisa Mashiko , Hidefumi Ishibashi
- 申请人： Toshikazu Koudo , Masaharu Imura , Yoshiki Kuno , Yasuhisa Mashiko , Hidefumi Ishibashi
- 优先权： JP7-048450 19950308; JP7-048451 19950308; JP7-051261 19950310
- 主分类号： G11B700
- IPC分类号： G11B700
摘要：
A virtual RAM read address generating circuit (41) generates a virtual address on the basis of an output signal of a crystal oscillation circuit (36). A phase comparison circuit (39) which performs phase comparison with a write address, and a spindle control circuit (3) which controls rotation of a disk with reference to outputs of a frequency comparison circuit (38) and the phase comparison circuit (39) are disposed. Therefore, a phase error can be fed back to a spindle motor, thereby preventing linear velocity deviation from occurring in a steady state. By using the thus configured reproducing device, the reproduction quality in the case where a disk wherein recording was performed by the CLV system is reproduced by the variable linear velocity reproduction system is ensured, and both high-speed access and low power consumption are realized.