发明名称 |
Photodisc apparatus with gain control of tracking servo loop |
摘要 |
A gain control device for controlling the loop gain of a servo tracking system which enables a beam spot formed on a photodisc through an objective lens to trace a track on the disc. The gain control device opens the tracking servo loop and applied a drive signal to a lens actuator so as to move the objective lens across the tracks thereby generating tracking error signals. The device samples the tracking error signals and detects the amplitudes of these signals, and controls the loop gain such that the detected amplitudes fall within a predetermined allowable range.
|
申请公布号 |
US5014256(A) |
申请公布日期 |
1991.05.07 |
申请号 |
US19900515015 |
申请日期 |
1990.04.26 |
申请人 |
OLYMPUS OPTICAL CO., LTD. |
发明人 |
HORIE, YUJI;YOSHIKAWA, SHOJI |
分类号 |
G11B7/085;G11B7/09 |
主分类号 |
G11B7/085 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|