公开(公告)号：US07061951B2

公开(公告)日：2006-06-13

申请号：US10612579

申请日：2003-07-02

申请人： Alexander Fairgrieve ,  D. Stuart Smith ,  Theodore D. Rees ,  Bill R. Tang

发明人： Alexander Fairgrieve ,  D. Stuart Smith ,  Theodore D. Rees ,  Bill R. Tang

IPC分类号： H01S3/00

CPC分类号： G11B7/1263 ,  H01S5/042 ,  H01S5/0683

摘要： Methods and system are provided for automatic power control of a laser diode, e.g., in a laser driver. In accordance with an embodiment of the present invention, a power controller includes a detector circuit adapted to detect the output of the laser diode and to produce a measured output therefrom. A comparator compares a desired output to the measured output, and produces an error signal therefrom. The error signal is provided to an integrator circuit that produces an integrated error signal. At least one digital-to-analog converter (DAC) uses the integrated error signal to produce a current drive signal that drives the laser diode.

摘要翻译： 提供了用于例如激光驱动器中的激光二极管的自动功率控制的方法和系统。 根据本发明的实施例，功率控制器包括检测器电路，其适于检测激光二极管的输出并从其产生测量的输出。 比较器将期望的输出与测量的输出进行比较，并从其产生误差信号。 该误差信号被提供给产生积分误差信号的积分器电路。 至少一个数模转换器（DAC）使用积分误差信号来产生驱动激光二极管的电流驱动信号。

公开(公告)号：US07382807B2

公开(公告)日：2008-06-03

申请号：US11399976

申请日：2006-04-07

申请人： Alexander Fairgrieve ,  D. Stuart Smith ,  Theodore D. Rees ,  Bill R. Tang

发明人： Alexander Fairgrieve ,  D. Stuart Smith ,  Theodore D. Rees ,  Bill R. Tang

IPC分类号： H01S3/30 ,  H01S3/13 ,  H01S3/00

CPC分类号： G11B7/1263 ,  H01S5/042 ,  H01S5/0683

摘要： Methods and system are provided for automatic power control of a laser diode, e.g., in a laser driver. In accordance with an embodiment of the present invention, a power controller includes a detector circuit adapted to detect the output of the laser diode and to produce a measured output therefrom. A comparator compares a desired output to the measured output, and produces an error signal therefrom. The error signal is provided to an integrator circuit that produces an integrated error signal. At least one digital-to-analog converter (DAC) uses the integrated error signal to produce a current drive signal that drives the laser diode.

摘要翻译： 提供了用于例如激光驱动器中的激光二极管的自动功率控制的方法和系统。 根据本发明的实施例，功率控制器包括检测器电路，其适于检测激光二极管的输出并从其产生测量的输出。 比较器将期望的输出与测量的输出进行比较，并从其产生误差信号。 该误差信号被提供给产生积分误差信号的积分器电路。 至少一个数模转换器（DAC）使用积分误差信号来产生驱动激光二极管的电流驱动信号。

公开(公告)号：US07317674B2

公开(公告)日：2008-01-08

申请号：US10797261

申请日：2004-03-10

申请人： Theodore D. Rees ,  Alexander Fairgrieve ,  Bill R. Tang ,  Barry Harvey ,  Yang Zhao

发明人： Theodore D. Rees ,  Alexander Fairgrieve ,  Bill R. Tang ,  Barry Harvey ,  Yang Zhao

IPC分类号： G11B7/12

CPC分类号： G11B7/1263 ,  G11B7/00456 ,  G11B7/123

摘要： Optical pick-up units and laser drivers are disclosed, which can be used in various types of information recording/reproducing apparatuses, such as, but not limited to, DVD and CD drives, DVD camcorders, and DVD video recorders. A laser driver integrated circuit (LDIC) includes an automatic power controller, a running optical power controller, and a write strategy generator. The LDIC can be part of a chip-set, to be located on an optical pick-up unit (OPU). The chip-set can also include a power monitor integrated circuit (PMIC) to monitor the laser diode, and a photo-detector integrated circuit (PDIC) to detect light produced by the laser diode. The PMIC and the PDIC each include their own offset, gain and sample-and-hold circuitry.

摘要翻译： 公开了光拾取单元和激光驱动器，其可以用于各种类型的信息记录/再现装置，例如但不限于DVD和CD驱动器，DVD摄像机和DVD视频记录器。 激光驱动器集成电路（LDIC）包括自动功率控制器，运行光功率控制器和写策略发生器。 LDIC可以是芯片组的一部分，位于光学拾取单元（OPU）上。 芯片组还可以包括用于监视激光二极管的功率监视器集成电路（PMIC）和用于检测由激光二极管产生的光的光电检测器集成电路（PDIC）。 PMIC和PDIC各自包括它们自己的偏移，增益和采样保持电路。