公开(公告)号：US07826739B2

公开(公告)日：2010-11-02

申请号：US11854431

申请日：2007-09-12

申请人： Stephen T. Nelson ,  Timothy G. Moran

发明人： Stephen T. Nelson ,  Timothy G. Moran

IPC分类号： H04B10/08

CPC分类号： H04B10/504 ,  H04B10/40

摘要： Systems and methods for controlling the modulation current of a laser included as a component of an optical transmitter, such as an optical transceiver module, are disclosed. Control of the modulation current, which affects various laser operational parameters, including extinction ratio and optical modulation amplitude, enables operation of the laser to be optimized, thereby enabling reliable transceiver performance to be achieved. In one embodiment, a method for modifying the modulation current in an optical transceiver module includes first sensing analog voltage data that proportionally relates to an actual modulation current of the laser. Once sensed, the analog voltage data are converted to digital voltage data. Using the digital voltage data, the actual modulation current of the laser is determined, then a desired modulation current is determined. Should a discrepancy exist between the actual and desired modulation currents, the actual modulation current is modified to match the desired current.

摘要翻译： 公开了用于控制作为诸如光收发器模块的光发射机的组件的激光器的调制电流的控制系统和方法。 控制影响各种激光器操作参数（包括消光比和光调制幅度）的调制电流使得能够优化激光器的操作，从而实现可靠的收发器性能。 在一个实施例中，用于修改光收发器模块中的调制电流的方法包括：首先感测与激光器的实际调制电流成比例地相关的模拟电压数据。 一旦感测到，模拟电压数据被转换成数字电压数据。 使用数字电压数据，确定激光器的实际调制电流，然后确定期望的调制电流。 如果在实际和期望的调制电流之间存在差异，则实际调制电流被修改以匹配期望的电流。

公开(公告)号：US07626439B2

公开(公告)日：2009-12-01

申请号：US11736263

申请日：2007-05-21

申请人： Jason Y. Miao ,  Timothy G. Moran

发明人： Jason Y. Miao ,  Timothy G. Moran

IPC分类号： H03K5/08

CPC分类号： H04B10/40

摘要： An amplifier stage or circuit for providing cross-point adjustment. The circuit may include a first input node configured to receive a first data signal and a second input node configured to receive a second data signal that is complementary of the first data signal. The circuit also includes a programmable first stage having a first node coupled to the first input node and a second node coupled to the second input node that is configured to adjust an amount of current provided to the first and second data signals to create a signal offset. The circuit further includes a second stage having a first node coupled to a third node of the programmable first stage and a second node coupled to a fourth node of the programmable first stage configured to provide the signal offset at a third and fourth node of the second stage to adjust the cross-point of the first and second signals.

摘要翻译： 用于提供交叉点调整的放大器级或电路。 电路可以包括被配置为接收第一数据信号的第一输入节点和被配置为接收与第一数据信号互补的第二数据信号的第二输入节点。 电路还包括可编程第一级，其具有耦合到第一输入节点的第一节点和耦合到第二输入节点的第二节点，其被配置为调整提供给第一和第二数据信号的电流量，以产生信号偏移 。 电路还包括第二级，其具有耦合到可编程第一级的第三节点的第一节点和耦合到可编程第一级的第四节点的第二节点，其被配置为在第二节点的第三和第四节点处提供信号偏移 阶段来调整第一和第二信号的交叉点。

公开(公告)号：US07502565B2

公开(公告)日：2009-03-10

申请号：US11072377

申请日：2005-03-04

申请人： Timothy G. Moran

发明人： Timothy G. Moran

IPC分类号： H04B10/08 ,  H04B10/12 ,  H04B10/02 ,  H04B10/04

CPC分类号： H04B10/6973 ,  H04B10/6972

摘要： A laser filter circuit includes an input terminal configured to receive an input laser signal and a first filter chain configured to generate a filtered signal. The first filter chain is coupled to the input terminal and has one or more filters connected in series. Each filter includes one or more adjustable capacitor networks. An adjustable capacitor controller generates one or more capacitor switch control signals based on an operating frequency of the input laser signal. The one or more control signals are for adjusting the capacitance of the one or more adjustable capacitor networks in the first filter chain. A plurality of output terminal output the filtered signal from the first filter chain.

摘要翻译： 激光滤波器电路包括被配置为接收输入激光信号的输入端子和被配置为产生滤波信号的第一滤波器链。 第一滤波器链耦合到输入端子并且具有串联连接的一个或多个滤波器。 每个滤波器包括一个或多个可调电容器网络。 可调电容器控制器基于输入激光信号的工作频率产生一个或多个电容器开关控制信号。 一个或多个控制信号用于调整第一滤波器链中的一个或多个可调电容器网络的电容。 多个输出端子从第一滤波器链输出滤波后的信号。

公开(公告)号：US07356681B2

公开(公告)日：2008-04-08

申请号：US11074606

申请日：2005-03-07

申请人： Timothy G. Moran ,  Gerald L. Dybsetter

发明人： Timothy G. Moran ,  Gerald L. Dybsetter

IPC分类号： G06F15/177 ,  G06F13/20

CPC分类号： G06F11/10 ,  G06F1/08 ,  H04B10/40 ,  H04W52/0287 ,  Y02D70/46

摘要： A telecommunications system that includes an external memory, an internal memory and a system clock. A boot component is configured to use the clock signal generated by the system clock to load data from external memory into internal memory when the telecommunication system operates in initialization mode. The telecommunication system is configured to operate based on the loaded data in internal memory when the system operates in normal mode. Once the initialization mode is complete, the system clock may be shut down since the telecommunication system does not need the system clock to perform normal mode operations. Subsequently, the system clock may be restarted if need be. Accordingly, the system clock is generated when it is needed, but not continuously. Therefore, cross-talk between the system clock and the receive and transmit path is reduced.

摘要翻译： 包括外部存储器，内部存储器和系统时钟的电信系统。 引导组件被配置为当电信系统在初始化模式下工作时，使用由系统时钟产生的时钟信号将数据从外部存储器加载到内部存储器中。 当系统以正常模式运行时，电信系统被配置为基于内部存储器中的加载数据进行操作。 一旦初始化模式完成，系统时钟可能会关闭，因为电信系统不需要系统时钟来执行正常模式操作。 随后，如果需要，系统时钟可以重新启动。 因此，系统时钟在需要时产生，但不是连续的。 因此，系统时钟与接收和发送路径之间的串扰减少了。

公开(公告)号：US20080069569A1

公开(公告)日：2008-03-20

申请号：US11854431

申请日：2007-09-12

申请人： Stephen T. Nelson ,  Timothy G. Moran

发明人： Stephen T. Nelson ,  Timothy G. Moran

IPC分类号： H04B10/12 ,  H04B10/00 ,  H04B10/04

CPC分类号： H04B10/504 ,  H04B10/40

摘要： Systems and methods for controlling the modulation current of a laser included as a component of an optical transmitter, such as an optical transceiver module, are disclosed. Control of the modulation current, which affects various laser operational parameters, including extinction ratio and optical modulation amplitude, enables operation of the laser to be optimized, thereby enabling reliable transceiver performance to be achieved. In one embodiment, a method for modifying the modulation current in an optical transceiver module includes first sensing analog voltage data that proportionally relates to an actual modulation current of the laser. Once sensed, the analog voltage data are converted to digital voltage data. Using the digital voltage data, the actual modulation current of the laser is determined, then a desired modulation current is determined. Should a discrepancy exist between the actual and desired modulation currents, the actual modulation current is modified to match the desired current.

摘要翻译： 公开了用于控制作为诸如光收发器模块的光发射机的组件的激光器的调制电流的控制系统和方法。 控制影响各种激光器操作参数（包括消光比和光调制幅度）的调制电流使得能够优化激光器的操作，从而实现可靠的收发器性能。 在一个实施例中，用于修改光收发器模块中的调制电流的方法包括：首先感测与激光器的实际调制电流成比例地相关的模拟电压数据。 一旦感测到，模拟电压数据被转换成数字电压数据。 使用数字电压数据，确定激光器的实际调制电流，然后确定期望的调制电流。 如果在实际和期望的调制电流之间存在差异，则实际调制电流被修改以匹配期望的电流。

公开(公告)号：US07184452B2

公开(公告)日：2007-02-27

申请号：US11071714

申请日：2005-03-03

申请人： Timothy G. Moran

发明人： Timothy G. Moran

IPC分类号： H01S3/00

CPC分类号： H01S5/042 ,  H01S5/0428 ,  H04B15/02

摘要： A laser driver circuit for reducing electromagnetic interference is disclosed. The laser driver circuit includes a first differential amplifier circuit, a second differential amplifier circuit and a glitch smoothing circuit. The first differential amplifier circuit is coupled to a pair of differential input signals, and is configured to generate a first amplified signal. The second differential amplifier circuit is coupled to the pair of differential input signals, and is configured to generate a second amplified signal. The first and second amplified signals together form a differential pair of output signals. The glitch smoothing circuit has a first output terminal coupled to the first differential amplifier circuit and a second output terminal coupled to the second differential amplifier circuit. The glitch smoothing circuit is configured to reduce glitches on the differential pair of output signals when the pair of differential input signals switch states.

摘要翻译： 公开了一种用于降低电磁干扰的激光驱动电路。 激光驱动电路包括第一差分放大器电路，第二差分放大器电路和毛刺平滑电路。 第一差分放大器电路耦合到一对差分输入信号，并且被配置为产生第一放大信号。 第二差分放大器电路耦合到该对差分输入信号，并且被配置为产生第二放大信号。 第一和第二放大信号一起形成差分输出信号对。 毛刺平滑电路具有耦合到第一差分放大器电路的第一输出端和耦合到第二差分放大器电路的第二输出端。 毛刺平滑电路被配置为当一对差分输入信号切换状态时，减少差分输出信号对的毛刺。

公开(公告)号：US07764885B2

公开(公告)日：2010-07-27

申请号：US11626081

申请日：2007-01-23

申请人： The'Linh Nguyen ,  Timothy G. Moran

发明人： The'Linh Nguyen ,  Timothy G. Moran

IPC分类号： H04B10/00

CPC分类号： H03F3/45475 ,  H03F3/45085 ,  H03F2203/45134 ,  H03F2203/45324 ,  H03F2203/45566 ,  H03F2203/45631 ,  H03F2203/45641 ,  H03F2203/45654 ,  H03K5/1565

摘要： Modules and signal control circuits configured to at least partially compensate for or adjust for asymmetric rise/fall time. The circuit may include a first input node configured to receive a first data signal and a second input node configured to receive a second data signal that is complementary of the first data signal. The circuit may also include a first stage having a first node coupled to the first input node and a second node coupled to the second input node and a second stage having a first node coupled to a third node of the first stage and a second node coupled to a fourth node of the first stage. The second stage may be configured to drive a load such as a laser. The circuit may further include a third input node configured to receive a third data signal and a fourth input node configured to receive a fourth data signal that is the complementary of the third data signal. Additionally, a control stage having a first node coupled the third input node, having a second node coupled to the fourth input node, having a third node coupled to the third node of the first stage and having a fourth node coupled to the fourth node of the first stage.

摘要翻译： 模块和信号控制电路被配置为至少部分地补偿或调整不对称的上升/下降时间。 电路可以包括被配置为接收第一数据信号的第一输入节点和被配置为接收与第一数据信号互补的第二数据信号的第二输入节点。 电路还可以包括具有耦合到第一输入节点的第一节点和耦合到第二输入节点的第二节点的第一阶段和具有耦合到第一阶段的第三节点的第一节点的第二阶段和耦合到第二节点的第二节点 到第一级的第四个节点。 第二级可以被配置为驱动诸如激光器的负载。 电路还可以包括被配置为接收第三数据信号的第三输入节点和被配置为接收作为第三数据信号的互补的第四数据信号的第四输入节点。 另外，控制级具有耦合第三输入节点的第一节点，具有耦合到第四输入节点的第二节点，具有耦合到第一级的第三节点的第三节点，并且具有耦合到第四节点的第四节点的第四节点 第一阶段

公开(公告)号：US07439480B2

公开(公告)日：2008-10-21

申请号：US11072180

申请日：2005-03-04

申请人： Timothy G. Moran

发明人： Timothy G. Moran

IPC分类号： H03F3/08 ,  G01J1/44

CPC分类号： G05F3/26 ,  H01L31/02019

摘要： Systems and methods for regulating a current mirror. A current mirror includes mirror circuits that each include a transistor or a transistor network. A mirror circuit in the current mirror is used by a detector of an optical receiver to draw current in response to an incident optical signal on the photodiode. The transistor in the current mirror is connected with a regulating amplifier that drives a gate of the transistor. The regulating amplifier uses the drain voltage of the transistor as an input such that the amplifier's output drives the gate such that the drain voltage substantially matches a reference voltage that is also an input to the regulating amplifier. The regulating amplifier can be integrated with the current mirror and eliminates the need for an external capacitor to reduce the effects of noise on current drawn by the detector.

摘要翻译： 用于调节电流镜的系统和方法。 电流镜包括各自包括晶体管或晶体管网络的镜像电路。 电流镜中的镜像电路由光接收器的检测器用于响应于光电二极管上的入射光信号而抽取电流。 电流镜中的晶体管与驱动晶体管栅极的调节放大器连接。 调节放大器使用晶体管的漏极电压作为输入，使得放大器的输出驱动栅极，使得漏极电压基本上与也是调节放大器的输入的参考电压匹配。 调节放大器可以与电流镜一体化，不需要外部电容器来减少噪声对检测器拉出的电流的影响。

公开(公告)号：US07324570B2

公开(公告)日：2008-01-29

申请号：US11072179

申请日：2005-03-04

申请人： Timothy G. Moran

发明人： Timothy G. Moran

IPC分类号： H01S3/10 ,  H01S3/04 ,  H01S3/00

CPC分类号： H01S5/06832 ,  H01S5/0427 ,  H01S5/06804

摘要： Systems and methods for continuously compensating a modulation current of a laser. A temperature compensation circuit has circuitry with a positive temperature coefficient connected with circuitry having a negative temperature coefficient. The temperature compensation circuit generates a temperature dependent reference current that is mirrored to a gain circuit. The gain circuit provides variable gain. The gain circuit also provides inputs that can be set to select a particular gain. The output of the gain circuit, which changes as temperature affects the reference current, is used to compensate the modulation current of the laser.

摘要翻译： 用于连续补偿激光器调制电流的系统和方法。 温度补偿电路具有正温度系数与具有负温度系数的电路相连的电路。 温度补偿电路产生镜像到增益电路的与温度相关的参考电流。 增益电路提供可变增益。 增益电路还提供可设置为选择特定增益的输入。 使用随温度影响参考电流而变化的增益电路的输出来补偿激光器的调制电流。

公开(公告)号：US4791314A

公开(公告)日：1988-12-13

申请号：US930593

申请日：1986-11-13

申请人： James R. Kuo ,  Timothy G. Moran

发明人： James R. Kuo ,  Timothy G. Moran

IPC分类号： H03K19/0175 ,  H03F1/52 ,  H03K17/08 ,  H03K17/082 ,  H03K19/003 ,  H03K19/013 ,  H03K19/018 ,  H03K5/153 ,  H03K3/295 ,  H03K17/14 ,  H03K17/30

CPC分类号： H03K19/01806 ,  H03F1/52 ,  H03K17/0826 ,  H03K19/0133 ,  H03K2017/0806

摘要： A line driver circuit capable of operating at high speeds. The output transistor, an emitter connected to an output terminal, has a special feedback capacitor connected to its base. The feedback capacitor helps pull the output terminal high to increase the switching speed of the line driver circuit. Special current injection and removal techniques are used to speed the switching times of the PNP current supply transistors. The line driver circuit also has special circuitry to limit the output current from exceeding certain limits and for keeping the line driver circuit from overheating.

摘要翻译： 能够高速运转的线路驱动电路。 输出晶体管，连接到输出端子的发射极，具有连接到其基极的特殊反馈电容器。 反馈电容器有助于将输出端子拉高，以提高线路驱动电路的开关速度。 采用特殊的电流注入和去除技术来加速PNP电流晶体管的开关时间。 线路驱动器电路还具有特殊的电路，用于限制输出电流超过一定限度并保持线路驱动电路不会过热。