公开(公告)号：US06501317B2

公开(公告)日：2002-12-31

申请号：US09828398

申请日：2001-04-06

申请人： Xijian Lin ,  Barry Harvey ,  Alexander Fairgrieve

发明人： Xijian Lin ,  Barry Harvey ,  Alexander Fairgrieve

IPC分类号： H03K522

CPC分类号： H03H11/265

摘要： A delay circuit is provided for use in a ring oscillator of a phase locked loop (PLL). The delay circuit includes a differential pair of NMOS transistors 102 and 103 with an NMOS transistor 101 providing the tail current for the differential pair. Complementary NMOS and PMOS load transistors 104,106 and 105, 107 provide loads for the differential transistor 102 and 103. Transistors 111-114 and 121-122 together with an amplifier 130 provide biasing for the delay device. The amplifier 130 has a non-inverting input set to VDD−VCLAMP. As configured, a constant output voltage swing from VDD to VDD−VCLAMP is provided at the outputs VOUT+ and VOUT− of the delay device, independent of a control voltage VCTL used to set the tail current. The NMOS load transistor 104, as opposed to the PMOS transistor 4 in FIG. 1, does not contribute to the gate parasitic capacitance enabling a high operation speed without consumption of more supply current. A wide frequency tuning range of a ring oscillator using the delay circuit of FIG. 2 is provided because the operating frequency for a ring oscillator will be directly proportional to the tail current through transistor 101.

摘要翻译： 提供了一种用于锁相环（PLL）的环形振荡器的延迟电路。 延迟电路包括NMOS晶体管102和103的差分对，NMOS晶体管101为差分对提供尾电流。 互补NMOS和PMOS负载晶体管104,106和105,107为差分晶体管102和103提供负载。晶体管111-114和121-122与放大器130一起为延迟器提供偏置。 放大器130具有设置为VDD-VCLAMP的非反相输入。 根据配置，在延迟器件的输出VOUT +和VOUT-上提供从VDD到VDD-VCLAMP的恒定输出电压摆幅，与用于设置尾部电流的控制电压VCTL无关。 NMOS负载晶体管104与图3中的PMOS晶体管4相反。 1，不影响栅极寄生电容，能够在不消耗更多电源电流的情况下实现高运行速度。 使用图1的延迟电路的环形振荡器的宽频率调谐范围。 提供了图2，因为环形振荡器的工作频率将与通过晶体管101的尾流成正比。

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。

公开(公告)号：US20060182159A1

公开(公告)日：2006-08-17

申请号：US11399976

申请日：2006-04-07

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

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

IPC分类号： H01S3/00 ,  H01S3/13

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.

公开(公告)号：US6031424A

公开(公告)日：2000-02-29

申请号：US150788

申请日：1998-09-10

申请人： Alexander Fairgrieve

发明人： Alexander Fairgrieve

IPC分类号： H03F3/45 ,  H01H85/143

CPC分类号： H03F3/45085 ,  H03F2203/45352 ,  H03F2203/45584 ,  H03F2203/45641 ,  H03F2203/45648 ,  H03F2203/45696

摘要： The present invention is a differential amplifier with circuitry to eliminate the effect of transistor impedance other than an actual load impedance on voltage gain. The circuitry includes a pair of transistors 400 and 402, each with a base connected to a respective input of the differential amplifier along with a similar base connection of a respective one of transistors 100 and 102, and an emitter connected to a current source 404. A collector of transistor 400 is connected through transistor 410 to the emitter of a current sink transistor 306, while the collector of transistor 402 is connected through transistor 412 to the emitter of a current sink transistor 308. Operational amplifiers (opamps) 420 and 422 serve as voltage followers to connect the collector of transistor 100 to the base of transistor 412, and the collector of transistor 102 to the base of transistor 410. An inverting input of the opamps 420 and 422 are connected to the emitter of transistors 410 and 412 to eliminate the effect of a emitter to base voltage drop in transistors 410 and 412. With such components, loading at the outputs V.sub.OUT and V.sub.OUTB is substantially limited to the actual load provided by transistors 306 and 308 and resistors 316 and 318.

摘要翻译： 本发明是一种差分放大器，其具有消除除实际负载阻抗之外的晶体管阻抗对电压增益的影响的电路。 该电路包括一对晶体管400和402，每个晶体管400和402各自具有连接到差分放大器的相应输入端的基极以及晶体管100和102的相应基极连接以及连接到电流源404的发射极。 晶体管400的集电极通过晶体管410连接到电流宿晶体管306的发射极，而晶体管402的集电极通过晶体管412连接到电流宿晶体管308的发射极。运算放大器（运算放大器）420和422 作为电压跟随器将晶体管100的集电极连接到晶体管412的基极，晶体管102的集电极连接到晶体管410的基极。运算放大器420和422的反相输入端连接到晶体管410和412的发射极， 消除了发射极对晶体管410和412中的基极电压降的影响。通过这样的部件，输出端VOUT和VOUTB的负载基本上限于 由晶体管306和308以及电阻器316和318提供的实际负载。

公开(公告)号：US08384832B2

公开(公告)日：2013-02-26

申请号：US12844691

申请日：2010-07-27

申请人： Alexander Fairgrieve ,  D. Stuart Smith

发明人： Alexander Fairgrieve ,  D. Stuart Smith

IPC分类号： H04N9/28

CPC分类号： H04N9/3173 ,  H04N9/312 ,  H04N9/3155

摘要： Systems, methods and devices provide for fast and power efficient transfer of three color data words (e.g., a M-bit red color word, a M bit green color word and a M-bit blue color word) per pixel from a controller to a laser diode driver (LDD). First and second transfer words are produced based on the three color data words. The first transfer word is transferred from the controller to the LDD and stored at LDD in response to a low-to-high portion of a cycle of a data transfer clock, and the second transfer word is transferred and stored in response to a high-to-low portion of a cycle of the data transfer clock. The first, second and third color data words are reproduced by the LDD in dependence on the first and second received transfer words. First, second and third DACs of the LDD are driven with the first color data word, the second color data word, and the third color data word. Three light sources (e.g., red, green and blue laser diodes or LEDs) are driven with output currents of the DACs.

摘要翻译： 系统，方法和装置提供从控制器到每个像素的三色数据字（例如，M位红色字，M位绿色字和M位蓝色字）的快速和功率有效传输。 激光二极管驱动器（LDD）。 基于三色数据字产生第一和第二传送字。 第一传送字从控制器传送到LDD，并且响应于数据传输时钟的周期的低到高部分而存储在LDD处，并且响应于高速数据传送字符而传送和存储第二传送字， 数据传输时钟周期的低位部分。 第一，第二和第三颜色数据字由LDD根据第一和第二接收的传送字再现。 首先，利用第一颜色数据字，第二颜色数据字和第三颜色数据字来驱动LDD的第二和第三DAC。 三个光源（例如，红，绿和蓝激光二极管或LED）由DAC的输出电流驱动。

公开(公告)号：US20060280089A1

公开(公告)日：2006-12-14

申请号：US11233193

申请日：2005-09-22

申请人： Miguel Perez ,  Alexander Fairgrieve ,  Akihiro Asada

发明人： Miguel Perez ,  Alexander Fairgrieve ,  Akihiro Asada

IPC分类号： G11B5/09

CPC分类号： G11B7/00456 ,  G11B2007/0006

摘要： Embodiments of the present invention relate to systems and methods for providing flexible multipulse strategies. In specific embodiments, a plurality of multipulse location registers are dedicated to storing multipulse location information. Each of a plurality of different mark-lengths that can result in at least one multipulse is mapped to one or more bit location within the multipulse location registers, such that a unique multipulse execution strategy can be defined for each of the plurality of different mark-lengths. Each bit location within the multipulse location registers can contain a first type of bit or a second type of bit. The first type of bit is used to indicate where to execute a multipulse, and the second type of bit is used to indicate where to not execute a multipulse. This abstract is not intended to be a complete description of the various embodiments of the present invention.

公开(公告)号：US20110157485A1

公开(公告)日：2011-06-30

申请号：US12844691

申请日：2010-07-27

申请人： Alexander Fairgrieve ,  D. Stuart Smith

发明人： Alexander Fairgrieve ,  D. Stuart Smith

IPC分类号： H04N9/31 ,  H01S3/10

CPC分类号： H04N9/3173 ,  H04N9/312 ,  H04N9/3155

摘要： Systems, methods and devices provide for fast and power efficient transfer of three color data words (e.g., a M-bit red color word, a M bit green color word and a M-bit blue color word) per pixel from a controller to a laser diode driver (LDD). First and second transfer words are produced based on the three color data words. The first transfer word is transferred from the controller to the LDD and stored at LDD in response to a low-to-high portion of a cycle of a data transfer clock, and the second transfer word is transferred and stored in response to a high-to-low portion of a cycle of the data transfer clock. The first, second and third color data words are reproduced by the LDD in dependence on the first and second received transfer words. First, second and third DACs of the LDD are driven with the first color data word, the second color data word, and the third color data word. Three light sources (e.g., red, green and blue laser diodes or LEDs) are driven with output currents of the DACs.

摘要翻译： 系统，方法和装置提供从控制器到每个像素的三色数据字（例如，M位红色字，M位绿色字和M位蓝色字）的快速和功率有效传输。 激光二极管驱动器（LDD）。 基于三色数据字产生第一和第二传送字。 第一传送字从控制器传送到LDD，并且响应于数据传输时钟的周期的低到高部分而存储在LDD处，并且响应于高速数据传送字符而传送和存储第二传送字， 数据传输时钟周期的低位部分。 第一，第二和第三颜色数据字由LDD根据第一和第二接收的传送字再现。 首先，利用第一颜色数据字，第二颜色数据字和第三颜色数据字来驱动LDD的第二和第三DAC。 三个光源（例如，红，绿和蓝激光二极管或LED）由DAC的输出电流驱动。

公开(公告)号：US07492686B2

公开(公告)日：2009-02-17

申请号：US11233193

申请日：2005-09-22

申请人： Miguel Gabino Perez ,  Alexander Fairgrieve ,  Akihiro Asada

发明人： Miguel Gabino Perez ,  Alexander Fairgrieve ,  Akihiro Asada

IPC分类号： G11B5/09

CPC分类号： G11B7/00456 ,  G11B2007/0006

摘要： Embodiments of the present invention relate to systems and methods for providing flexible multipulse strategies. In specific embodiments, a plurality of multipulse location registers are dedicated to storing multipulse location information. Each of a plurality of different mark-lengths that can result in at least one multipulse is mapped to one or more bit location within the multipulse location registers, such that a unique multipulse execution strategy can be defined for each of the plurality of different mark-lengths. Each bit location within the multipulse location registers can contain a first type of bit or a second type of bit. The first type of bit is used to indicate where to execute a multipulse, and the second type of bit is used to indicate where to not execute a multipulse. This abstract is not intended to be a complete description of the various embodiments of the present invention.

摘要翻译： 本发明的实施例涉及用于提供灵活多脉冲策略的系统和方法。 在具体实施例中，多个多脉冲位置寄存器专用于存储多脉冲位置信息。 可以导致至少一个多脉冲的多个不同的标记长度中的每一个被映射到多脉冲位置寄存器内的一个或多个比特位置，使得可以为多个不同的标记位中的每一个定义唯一的多脉冲执行策略， 长度 多脉冲位置寄存器中的每个位位置可以包含第一类型的位或第二类型的位。 第一种类型的位用于指示执行多脉冲的位置，第二种类型的位用于指示不执行多脉冲的位置。 该摘要并不是对本发明的各种实施例的完整描述。

公开(公告)号：US07511931B2

公开(公告)日：2009-03-31

申请号：US11761285

申请日：2007-06-11

申请人： Alexander Fairgrieve

发明人： Alexander Fairgrieve

IPC分类号： H02H9/06 ,  H02H3/22

CPC分类号： H03K17/08142 ,  H03K17/08146 ,  H03K17/78

摘要： A transistor for use in an output stage is selectively part of one of two different circuits, one circuit being an electrostatic discharge (ESD) clamp circuit, the other circuit being an output stage circuit. For example, the transistor can be selectively connected such that it is part of the ESD clamp circuit, e.g., when a load (e.g., laser diode) connected to a current path terminal (e.g., drain or collector) of the transistor is not to be driven by a drive circuit. However, when the load connected to the current path terminal of the transistor is to be driven by the drive circuit, the transistor can be connected such that it receives a drive signal at its control terminal, from the drive circuit. This abstract is not intended to describe all embodiments of the present invention.

摘要翻译： 用于输出级的晶体管是两个不同电路之一的一部分，一个电路是静电放电（ESD）钳位电路，另一个电路是输出级电路。 例如，可以选择性地连接晶体管，使其成为ESD钳位电路的一部分，例如，当连接到晶体管的电流路径端子（例如，漏极或集电极）的负载（例如，激光二极管）不是 由驱动电路驱动。 然而，当连接到晶体管的电流通路端子的负载将被驱动电路驱动时，晶体管可以被连接成使得其在其控制端从驱动电路接收驱动信号。 该摘要并不旨在描述本发明的所有实施例。

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。