公开(公告)号：US20070019690A1

公开(公告)日：2007-01-25

申请号：US11424259

申请日：2006-06-15

申请人： Chin-Tui Chien ,  Chien-Ming Chen

发明人： Chin-Tui Chien ,  Chien-Ming Chen

IPC分类号： H01S3/30

CPC分类号： H01S5/06825

摘要： Pickup head circuits with a protection circuit capable of preventing unexpected large current flowing through a laser diode during power-on interval. A driving transistor is coupled between a laser diode and a first power voltage, an automatic laser power control (ALPC) circuit is coupled between the first power voltage and a second power voltage, controlling the driving transistor to drive the laser diode. A protection circuit is coupled between the power voltage and a control terminal of the driving transistor, forcing a voltage at the control terminal of the driving transistor to follow the first power voltage during a power-on interval.

摘要翻译： 具有保护电路的拾音头电路，能够在上电间隔期间防止意外的大电流流过激光二极管。 驱动晶体管耦合在激光二极管和第一电源电压之间，自动激光功率控制（ALPC）电路耦合在第一电源电压和第二电源电压之间，控制驱动晶体管驱动激光二极管。 保护电路耦合在电源电压和驱动晶体管的控制端之间，迫使驱动晶体管的控制端的电压在通电间隔期间跟随第一电源电压。

公开(公告)号：US07796659B2

公开(公告)日：2010-09-14

申请号：US11424259

申请日：2006-06-15

申请人： Chin-Tui Chien ,  Chien-Ming Chen

发明人： Chin-Tui Chien ,  Chien-Ming Chen

IPC分类号： H01S3/00

CPC分类号： H01S5/06825

摘要： Pickup head circuits with a protection circuit capable of preventing unexpected large current flowing through a laser diode during power-on interval. A driving transistor is coupled between a laser diode and a first power voltage, an automatic laser power control (ALPC) circuit is coupled between the first power voltage and a second power voltage, controlling the driving transistor to drive the laser diode. A protection circuit is coupled between the power voltage and a control terminal of the driving transistor, forcing a voltage at the control terminal of the driving transistor to follow the first power voltage during a power-on interval.

摘要翻译： 具有保护电路的拾音头电路，能够在上电间隔期间防止意外的大电流流过激光二极管。 驱动晶体管耦合在激光二极管和第一电源电压之间，自动激光功率控制（ALPC）电路耦合在第一电源电压和第二电源电压之间，控制驱动晶体管驱动激光二极管。 保护电路耦合在电源电压和驱动晶体管的控制端之间，迫使驱动晶体管的控制端的电压在通电间隔期间跟随第一电源电压。