公开(公告)号：US08094533B2

公开(公告)日：2012-01-10

申请号：US13100033

申请日：2011-05-03

Applicant: Theodore D. Rees ,  Akihiro Asada ,  D. Stuart Smith

Inventor： Theodore D. Rees ,  Akihiro Asada ,  D. Stuart Smith

IPC: G11B7/004

CPC classification number: G11B7/126 ,  G11B7/0062

Abstract: A hybrid LDD includes a read channel to selectively output a read current, a plurality of write channels, each to selectively output a different write current, and an oscillator channel to selectively output an oscillator current. Additionally, the hybrid LDD includes programmable LDD controller that receives the plurality of enable signals from the external controller, and based on the enable signals, controls timing of the currents output by at least the write channels. The programmable LDD controller can also control timing of the currents output by the read and oscillator channels, based on the enable signals. Further and alternative embodiments are also provided.

Abstract translation: 混合LDD包括用于选择性地输出读取电流的读取通道，多个写入通道，每个用于选择性地输出不同的写入电流，以及振荡器通道以选择性地输出振荡器电流。 此外，混合LDD包括可编程LDD控制器，其从外部控制器接收多个使能信号，并且基于使能信号，控制由至少写入通道输出的电流的定时。 可编程LDD控制器还可以基于使能信号来控制由读取和振荡器通道输出的电流的定时。 还提供了进一步的和备选的实施例。

公开(公告)号：US20090073829A1

公开(公告)日：2009-03-19

申请号：US12277912

申请日：2008-11-25

Applicant: Theodore D. Rees ,  Akihiro Asada ,  D. Stuart Smith

Inventor： Theodore D. Rees ,  Akihiro Asada ,  D. Stuart Smith

IPC: G11B7/00

CPC classification number: G11B7/126 ,  G11B7/0062

Abstract: A hybrid LDD includes a read channel to selectively output a read current, a plurality of write channels, each to selectively output a different write current, and an oscillator channel to selectively output an oscillator current. Additionally, the hybrid LDD includes programmable LDD controller that receives the plurality of enable signals from the external controller, and based on the enable signals, controls timing of the currents output by at least the write channels. The programmable LDD controller can also control timing of the currents output by the read and oscillator channels, based on the enable signals. Further and alternative embodiments are also provided.

Abstract translation: 混合LDD包括用于选择性地输出读取电流的读取通道，多个写入通道，每个用于选择性地输出不同的写入电流，以及振荡器通道以选择性地输出振荡器电流。 此外，混合LDD包括可编程LDD控制器，其从外部控制器接收多个使能信号，并且基于使能信号，控制由至少写入通道输出的电流的定时。 可编程LDD控制器还可以基于使能信号来控制由读取和振荡器通道输出的电流的定时。 还提供了进一步的和备选的实施例。

公开(公告)号：US20110228661A1

公开(公告)日：2011-09-22

申请号：US13100033

申请日：2011-05-03

Applicant: Theodore D. Rees ,  Akihiro Asada ,  D. Stuart Smith

Inventor： Theodore D. Rees ,  Akihiro Asada ,  D. Stuart Smith

IPC: G11B20/12

CPC classification number: G11B7/126 ,  G11B7/0062

Abstract: A hybrid LDD includes a read channel to selectively output a read current, a plurality of write channels, each to selectively output a different write current, and an oscillator channel to selectively output an oscillator current. Additionally, the hybrid LDD includes programmable LDD controller that receives the plurality of enable signals from the external controller, and based on the enable signals, controls timing of the currents output by at least the write channels. The programmable LDD controller can also control timing of the currents output by the read and oscillator channels, based on the enable signals. Further and alternative embodiments are also provided.

Abstract translation: 混合LDD包括用于选择性地输出读取电流的读取通道，多个写入通道，每个用于选择性地输出不同的写入电流，以及振荡器通道以选择性地输出振荡器电流。 此外，混合LDD包括可编程LDD控制器，其从外部控制器接收多个使能信号，并且基于使能信号，控制由至少写入通道输出的电流的定时。 可编程LDD控制器还可以基于使能信号来控制由读取和振荡器通道输出的电流的定时。 还提供了进一步的和备选的实施例。

公开(公告)号：US08018809B2

公开(公告)日：2011-09-13

申请号：US12277912

申请日：2008-11-25

Applicant: Theodore D. Rees ,  Akihiro Asada ,  D. Stuart Smith

Inventor： Theodore D. Rees ,  Akihiro Asada ,  D. Stuart Smith

IPC: G11B7/004

CPC classification number: G11B7/126 ,  G11B7/0062

Abstract: A hybrid LDD includes a read channel to selectively output a read current, a plurality of write channels, each to selectively output a different write current, and an oscillator channel to selectively output an oscillator current. Additionally, the hybrid LDD includes programmable LDD controller that receives the plurality of enable signals from the external controller, and based on the enable signals, controls timing of the currents output by at least the write channels. The programmable LDD controller can also control timing of the currents output by the read and oscillator channels, based on the enable signals. Further and alternative embodiments are also provided.

Abstract translation: 混合LDD包括用于选择性地输出读取电流的读取通道，多个写入通道，每个用于选择性地输出不同的写入电流，以及振荡器通道以选择性地输出振荡器电流。 此外，混合LDD包括可编程LDD控制器，其从外部控制器接收多个使能信号，并且基于使能信号，控制由至少写入通道输出的电流的定时。 可编程LDD控制器还可以基于使能信号来控制由读取和振荡器通道输出的电流的定时。 还提供了进一步的和备选的实施例。

公开(公告)号：US07246199B2

公开(公告)日：2007-07-17

申请号：US10775614

申请日：2004-02-10

Applicant: D. Stuart Smith ,  Theodore D. Rees ,  Miguel Gabino Perez

Inventor： D. Stuart Smith ,  Theodore D. Rees ,  Miguel Gabino Perez

IPC: G06F13/00

CPC classification number: G06F3/0656 ,  G06F3/0613 ,  G06F3/0677

Abstract: Double buffering of serial transfers is provided in order to allow for increased serial transfer rate without requiring increased internal processing speeds. A serial controller serially receives a word including address bits and data bits. During a write operation, the address bits are serially shifted into an address shift register, and the data bits are serially shifted into a data shift register. After the address bits and data bits are completely shifted into the respective address and data shift registers, the address bits and data bits are transferred in parallel to address and data holding registers. After the parallel transfers of the address bits and data bits from the address and data shift registers to the address and data holding registers, the address and data shift registers are available to serially receive additional address bits and data bits of an additional word.

Abstract translation: 提供串行传输的双缓冲，以便增加串行传输速率，而不需要增加内部处理速度。 串行控制器串行接收包括地址位和数据位的字。 在写操作期间，地址位被串行地移位到地址移位寄存器中，数据位被串行地移位到数据移位寄存器中。 在将地址位和数据位完全移入相应的地址和数据移位寄存器之后，地址位和数据位被并行传送到地址和数据保持寄存器。 在将地址位和数据位从地址和数据移位寄存器并行传输到地址和数据保持寄存器之后，地址和数据移位寄存器可用于串行接收附加字的附加地址位和数据位。

公开(公告)号：US07382807B2

公开(公告)日：2008-06-03

申请号：US11399976

申请日：2006-04-07

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

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

IPC: H01S3/30 ,  H01S3/13 ,  H01S3/00

CPC classification number: G11B7/1263 ,  H01S5/042 ,  H01S5/0683

Abstract: 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.

Abstract translation: 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：US20080098144A1

公开(公告)日：2008-04-24

申请号：US11625116

申请日：2007-01-19

Applicant: Theodore D. Rees ,  D. Stuart Smith ,  Dong Zheng

Inventor： Theodore D. Rees ,  D. Stuart Smith ,  Dong Zheng

IPC: G06F13/14 ,  G06F13/38

CPC classification number: G11B7/12

Abstract: Methods and systems for allowing multiple devices to share the same serial lines (e.g., SDIO, SEN and SCLK) are provided. Such devices can be located, e.g., on an optical pick-up unit. Each device includes a serial interface, a device enable number (DEN) that differs from the DEN of each other device, and a plurality of registers, with at least one register being designated a device select register (DSR). The DSRs of the plurality of devices share a common address. The plurality of serial interfaces are collectively enabled and collectively disabled (e.g., via the SEN line). However, only one of the plurality of serial interfaces can be selected at one time, with the remaining of the plurality of serial interfaces being deselected. The serial interface of a device is selected when the DEN of the device is the same as the content of the DSR of the device, and deselected when the DEN of the device is not the same as the content of the DSR of the device.

Abstract translation: 提供了允许多个设备共享相同串行线路（例如，SDIO，SEN和SCLK）的方法和系统。 这样的设备可以位于例如光学拾取单元上。 每个设备包括串行接口，与每个其他设备的DEN不同的设备使能号码（DEN）以及多个寄存器，其中至少一个寄存器被指定为设备选择寄存器（DSR）。 多个设备的DSR共享公共地址。 多个串行接口集体启用并集体禁用（例如，经由SEN线路）。 然而，可以同时选择多个串行接口中的一个，其中多个串行接口的其余部分被取消选择。 当设备的DEN与设备的DSR内容相同时，选择设备的串行接口，当设备的DEN与设备的DSR内容不同时，取消选择。

公开(公告)号：US07562187B2

公开(公告)日：2009-07-14

申请号：US12029823

申请日：2008-02-12

Applicant: D. Stuart Smith ,  Theodore D. Rees ,  Miguel Gabino Perez

Inventor： D. Stuart Smith ,  Theodore D. Rees ,  Miguel Gabino Perez

IPC: G06F13/00

CPC classification number: G06F3/0656 ,  G06F3/0613 ,  G06F3/0677

Abstract: Double buffering of serial transfers is provided in order to allow for increased serial transfer rate without requiring increased internal processing speeds. A laser driver serial controller serially receives a word including address bits and data bits. During a write operation, the address bits are serially shifted into an address shift register of the laser driver, and the data bits are serially shifted into a data shift register of the laser driver. After the address bits and data bits are completely shifted into the respective address and data shift registers, the address bits and data bits are transferred in parallel to address and data holding registers of the laser driver. After the parallel transfers of the address bits and data bits from the address and data shift registers to the address and data holding registers, the address and data shift registers are available to serially receive additional address bits and data bits of an additional word.

Abstract translation: 提供串行传输的双缓冲，以便增加串行传输速率，而不需要增加内部处理速度。 激光驱动器串行控制器串行接收包括地址位和数据位的字。 在写入操作期间，地址位被串行地移入激光驱动器的地址移位寄存器，并且数据位被串行地移位到激光驱动器的数据移位寄存器中。 在将地址位和数据位完全移入相应的地址和数据移位寄存器之后，地址位和数据位被并行传送到激光驱动器的地址和数据保持寄存器。 在将地址位和数据位从地址和数据移位寄存器并行传输到地址和数据保持寄存器之后，地址和数据移位寄存器可用于串行接收附加字的附加地址位和数据位。

公开(公告)号：US07353333B2

公开(公告)日：2008-04-01

申请号：US11761970

申请日：2007-06-12

Applicant: D. Stuart Smith ,  Theodore D. Rees ,  Miguel Gabino Perez

Inventor： D. Stuart Smith ,  Theodore D. Rees ,  Miguel Gabino Perez

IPC: G06F13/00

CPC classification number: G06F3/0656 ,  G06F3/0613 ,  G06F3/0677

Abstract: Double buffering of serial transfers is provided in order to allow for increased serial transfer rate without requiring increased internal processing speeds. A laser driver serial controller serially receives a word including address bits and data bits. During a write operation, the address bits are serially shifted into an address shift register of the laser driver, and the data bits are serially shifted into a data shift register of the laser driver. After the address bits and data bits are completely shifted into the respective address and data shift registers, the address bits and data bits are transferred in parallel to address and data holding registers of the laser driver. After the parallel transfers of the address bits and data bits from the address and data shift registers to the address and data holding registers, the address and data shift registers are available to serially receive additional address bits and data bits of an additional word.

Abstract translation: 提供串行传输的双缓冲，以便增加串行传输速率，而不需要增加内部处理速度。 激光驱动器串行控制器串行接收包括地址位和数据位的字。 在写入操作期间，地址位被串行地移入激光驱动器的地址移位寄存器，并且数据位被串行地移位到激光驱动器的数据移位寄存器中。 在将地址位和数据位完全移入相应的地址和数据移位寄存器之后，地址位和数据位被并行传送到激光驱动器的地址和数据保持寄存器。 在将地址位和数据位从地址和数据移位寄存器并行传输到地址和数据保持寄存器之后，地址和数据移位寄存器可用于串行接收附加字的附加地址位和数据位。

公开(公告)号：US07061951B2

公开(公告)日：2006-06-13

申请号：US10612579

申请日：2003-07-02

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

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

IPC: H01S3/00

CPC classification number: G11B7/1263 ,  H01S5/042 ,  H01S5/0683

Abstract: 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.

Abstract translation: 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。