发明授权
US07394748B2 Method and apparatus for optical disk recording capable of reducing settling time and generating an accurate channel clock signal
失效
用于光盘记录的方法和装置，其能够减少建立时间并产生准确的通道时钟信号
- 专利标题： Method and apparatus for optical disk recording capable of reducing settling time and generating an accurate channel clock signal
- 专利标题（中）： 用于光盘记录的方法和装置，其能够减少建立时间并产生准确的通道时钟信号
-
申请号： US11705939申请日： 2007-02-14
-
公开(公告)号： US07394748B2公开(公告)日： 2008-07-01
- 发明人: Masaaki Tsuji , Ryohsuke Sugiyama
- 申请人： Masaaki Tsuji , Ryohsuke Sugiyama
- 申请人地址： JP Tokyo
- 专利权人： Ricoh Company, Ltd.
- 当前专利权人： Ricoh Company, Ltd.
- 当前专利权人地址： JP Tokyo
- 代理机构： Cooper & Dunham, LLP
- 优先权： JP2002-345918 20021128
- 主分类号： G11B7/00
- IPC分类号： G11B7/00
摘要：
An optical disk recording apparatus includes a first comparator, a second comparator, a third comparator, a selection circuit, a control voltage generator, a voltage control oscillator, and a control circuit. The first comparator compares frequency-divided signals to output an error signal. The second and third comparators compare a signal pre-recorded on an optical disk and the frequency-divided signal to output an error signal and a frequency differential signal. The selection circuit selects any one of the error signals to output the signal selected. The control voltage generator generates a control voltage from the signal from the selection circuit. The voltage control oscillator generates and outputs the write reference clock signal having a frequency corresponding to the control voltage from the control voltage generator. The control circuit controls operations of the selection circuit according to the frequency differential signals.
公开/授权文献
信息查询
IPC分类:
