发明名称 |
LASER DRIVING CIRCUIT, OPTICAL PICKUP AND RECORDING/READING EQUIPMENT |
摘要 |
Disclosed is a laser driving technique capable of reducing power consumption in a laser driving circuit to achieve reduced heat generation in an optical pickup of a recording/reading equipment for an optical disc. A base-voltage control circuit is connected to a base of a grounded-base cascode transistor connected between a driver circuit and a laser diode (LD), and a LD-anode-voltage control circuit is connected to an anode of the laser diode. The base-voltage control circuit and the LD-anode-voltage control circuit are connected to a controller, and operable to variously change an anode voltage of the laser diode and a base voltage of the cascode transistor depending on a driving current for the laser diode.
|
申请公布号 |
US2007280315(A1) |
申请公布日期 |
2007.12.06 |
申请号 |
US20070755346 |
申请日期 |
2007.05.30 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
MIZUNO HARUHIKO |
分类号 |
H01S3/13;H01S3/00 |
主分类号 |
H01S3/13 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|