发明授权
US4942563A Signal processing apparatus and method capable of providing precise
digital data
失效
能够提供精确数字数据的信号处理装置和方法
- 专利标题： Signal processing apparatus and method capable of providing precise digital data
- 专利标题（中）： 能够提供精确数字数据的信号处理装置和方法
-
申请号： US249928申请日： 1988-09-27
-
公开(公告)号： US4942563A公开(公告)日： 1990-07-17
- 发明人: Mikio Yamamuro
- 申请人： Mikio Yamamuro
- 申请人地址： JPX Kawasaki
- 专利权人： Kabushiki Kaisha Toshiba
- 当前专利权人： Kabushiki Kaisha Toshiba
- 当前专利权人地址： JPX Kawasaki
- 优先权： JPX62-246095 19870930; JPX62-246096 19870930; JPX62-246097 19870930
- 主分类号： G11B7/09
- IPC分类号： G11B7/09
摘要：
A light beam detector receiver a light beam reflected from an optical disk and generates two electrical signals, each corresponding to the amount of the light beam. The detector includes an adder for adding the two electrical signals to generate a first operation signal, a subtracter for subtracting one electrical signal from the other to generate a second operation signal, and a converter for converting the second operation signal into digital data in accordance with a conversion gain determined by the amplitude of the first operation signal. The digital data obtained is used for adjusting a position of an objective lens with respect to the optical disk.
公开/授权文献
信息查询
IPC分类:
