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公开(公告)号：US20120300606A1
公开(公告)日：2012-11-29
申请号：US13118242
申请日：2011-05-27
CPC分类号： H01S5/042
摘要： Various apparatuses, methods and systems for damping a current driver are disclosed herein. For example, some embodiments provide an apparatus for supplying current, including an output transistor connected between a voltage supply and a current output, and an active clamp connected between the current output and a current sink. The active clamp is adapted to connect the current output to the current sink when a voltage at the current output reaches a predetermined state relative to a voltage at a control input of the output transistor.
摘要翻译： 本文公开了用于阻尼电流驱动器的各种装置，方法和系统。 例如，一些实施例提供一种用于提供电流的装置，包括连接在电压源和电流输出端之间的输出晶体管和连接在电流输出端与电流源之间的有源钳位。 当电流输出端的电压相对于输出晶体管的控制输入处的电压达到预定状态时，有源钳位电路适于将电流输出连接到电流吸收器。
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公开(公告)号：US20100166031A1
公开(公告)日：2010-07-01
申请号：US12347311
申请日：2008-12-31
申请人： Shengyuan Li , Indumini Ranmuthu
发明人： Shengyuan Li , Indumini Ranmuthu
IPC分类号： H01S3/00
CPC分类号： H03K19/0175 , H01S5/0427
摘要： Laser diode driver architectures are disclosed. Some example current drivers are described, including a current channel to provide an output current. The current channel includes a current mirror with emitter degeneration, a startup transistor coupled to the current mirror to generate a DC bias on the current mirror, a beta helper circuit coupled to the current mirror and the startup transistor, to maintain the DC bias on the current mirror, and a cutoff transistor coupled to an emitter terminal of a current mirror transistor and to a reference voltage, to selectively couple the emitter terminal to the reference voltage to conduct the pre-determined output current. The example current drivers also include an output stage coupled to the output of the current mirror and to an output device, wherein the output stage provides a current gain in response to the cutoff transistor coupling the emitter terminal to the reference voltage.
摘要翻译： 公开了激光二极管驱动器架构。 描述了一些示例电流驱动器，包括提供输出电流的当前通道。 电流通道包括具有发射极退化的电流镜，耦合到电流镜的启动晶体管，以在电流镜上产生DC偏置，耦合到电流镜和启动晶体管的β辅助电路，以将DC偏置保持在 电流反射镜和耦合到电流镜晶体管的发射极端子和参考电压的截止晶体管，以将发射极端子选择性地耦合到参考电压以导通预定的输出电流。 示例性电流驱动器还包括耦合到电流镜的输出和输出装置的输出级，其中响应于将发射极端子耦合到参考电压的截止晶体管，输出级提供电流增益。
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公开(公告)号：US08437232B2
公开(公告)日：2013-05-07
申请号：US12633072
申请日：2009-12-08
申请人： Akihiko Doi , Shengyuan Li , Indumini Ranmuthu
发明人： Akihiko Doi , Shengyuan Li , Indumini Ranmuthu
IPC分类号： G11B7/00
CPC分类号： G11B7/126 , G11B2007/0006
摘要： A high frequency modulator is described. It comprises: a first converter for receiving a constant current signal and transmitting a first converted signal; an adder coupled the first converter and operative for transmitting a summed signal in response to receiving the first converted signal and selectively receiving a triangular signal; a first oscillator coupled to the adder for receiving the summed signal, the first oscillator operative for transmitting a time varying current signal; a second converter coupled to the first oscillator for receiving the time varying current signal and operative for transmitting a second converted signal; and an output device selectively coupled to the second converter and operative for transmitting an output signal in response to receiving either the second converted signal or an offset signal.
摘要翻译： 描述了高频调制器。 它包括：第一转换器，用于接收恒定电流信号并发送第一转换信号; 耦合第一转换器的加法器，用于响应于接收到第一转换信号并选择性地接收三角形信号而发送加法信号; 第一振荡器，耦合到所述加法器，用于接收所述相加的信号，所述第一振荡器用于发送时变电流信号; 耦合到所述第一振荡器的第二转换器，用于接收所述时变电流信号并且用于发送第二转换信号; 以及选择性地耦合到第二转换器并且响应于接收到第二转换信号或偏移信号而发送输出信号的输出装置。
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公开(公告)号：US20100315937A1
公开(公告)日：2010-12-16
申请号：US12633072
申请日：2009-12-08
申请人： Akihiko Doi , Shengyuan Li , Indumini Ranmuthu
发明人： Akihiko Doi , Shengyuan Li , Indumini Ranmuthu
CPC分类号： G11B7/126 , G11B2007/0006
摘要： A high frequency modulator is described. It comprises: a first converter for receiving a constant current signal and transmitting a first converted signal; an adder coupled the first converter and operative for transmitting a summed signal in response to receiving the first converted signal and selectively receiving a triangular signal; a first oscillator coupled to the adder for receiving the summed signal, the first oscillator operative for transmitting a time varying current signal; a second converter coupled to the first oscillator for receiving the time varying current signal and operative for transmitting a second converted signal; and an output device selectively coupled to the second converter and operative for transmitting an output signal in response to receiving either the second converted signal or an offset signal.
摘要翻译： 描述了高频调制器。 它包括：第一转换器，用于接收恒定电流信号并发送第一转换信号; 耦合第一转换器的加法器，用于响应于接收到第一转换信号并选择性地接收三角形信号而发送加法信号; 第一振荡器，耦合到所述加法器，用于接收所述相加的信号，所述第一振荡器用于发送时变电流信号; 耦合到所述第一振荡器的第二转换器，用于接收所述时变电流信号并且用于发送第二转换信号; 以及选择性地耦合到第二转换器并且响应于接收到第二转换信号或偏移信号而发送输出信号的输出装置。
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公开(公告)号：US08841943B2
公开(公告)日：2014-09-23
申请号：US13118242
申请日：2011-05-27
CPC分类号： H01S5/042
摘要： Various apparatuses, methods and systems for damping a current driver are disclosed herein. For example, some embodiments provide an apparatus for supplying current, including an output transistor connected between a voltage supply and a current output, and an active clamp connected between the current output and a current sink. The active clamp is adapted to connect the current output to the current sink when a voltage at the current output reaches a predetermined state relative to a voltage at a control input of the output transistor.
摘要翻译： 本文公开了用于阻尼电流驱动器的各种装置，方法和系统。 例如，一些实施例提供一种用于提供电流的装置，包括连接在电压源和电流输出端之间的输出晶体管和连接在电流输出端与电流源之间的有源钳位。 当电流输出端的电压相对于输出晶体管的控制输入处的电压达到预定状态时，有源钳位电路适于将电流输出连接到电流吸收器。
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公开(公告)号：US07940824B2
公开(公告)日：2011-05-10
申请号：US12347311
申请日：2008-12-31
申请人： Shengyuan Li , Indumini Ranmuthu
发明人： Shengyuan Li , Indumini Ranmuthu
IPC分类号： H01S5/06
CPC分类号： H03K19/0175 , H01S5/0427
摘要： Laser diode driver architectures are disclosed. Some example current drivers are described, including a current channel to provide an output current. The current channel includes a current mirror with emitter degeneration, a startup transistor coupled to the current mirror to generate a DC bias on the current mirror, a beta helper circuit coupled to the current mirror and the startup transistor, to maintain the DC bias on the current mirror, and a cutoff transistor coupled to an emitter terminal of a current mirror transistor and to a reference voltage, to selectively couple the emitter terminal to the reference voltage to conduct the pre-determined output current. The example current drivers also include an output stage coupled to the output of the current mirror and to an output device, wherein the output stage provides a current gain in response to the cutoff transistor coupling the emitter terminal to the reference voltage.
摘要翻译： 公开了激光二极管驱动器架构。 描述了一些示例电流驱动器，包括提供输出电流的当前通道。 电流通道包括具有发射极退化的电流镜，耦合到电流镜的启动晶体管，以在电流镜上产生DC偏置，耦合到电流镜和启动晶体管的β辅助电路，以将DC偏置保持在 电流反射镜和耦合到电流镜晶体管的发射极端子和参考电压的截止晶体管，以将发射极端子选择性地耦合到参考电压以导通预定的输出电流。 示例性电流驱动器还包括耦合到电流镜的输出和输出装置的输出级，其中响应于将发射极端子耦合到参考电压的截止晶体管，输出级提供电流增益。
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公开(公告)号：US08174953B2
公开(公告)日：2012-05-08
申请号：US12622559
申请日：2009-11-20
IPC分类号： G11B7/00
CPC分类号： G11B7/126 , G11B7/00456
摘要： An input current channel device is described. This device comprises a first terminal for receiving a reference signal; a second terminal for receiving a first target signal; a pass through device coupled to the first terminal, the pass through device operative for transmitting a delayed reference signal in response to receiving the reference signal; a first combination logic device coupled to the first terminal and the second terminal, the first combination logic device operative for transmitting a first combination logic signal in response to receiving the reference signal and the first target signal; a selection device coupled for receiving the delayed reference signal, the first combination logic signal, and a first synchronization signal, the selection device operative for selectively transmitting a second synchronization signal, and wherein selectively transmitting the second synchronization signal reduces skew between the reference channel and the first target channel.
摘要翻译： 描述输入电流通道器件。 该装置包括用于接收参考信号的第一端子; 用于接收第一目标信号的第二终端; 耦合到所述第一终端的通过设备，所述通过设备响应于接收到所述参考信号而用于发送延迟的参考信号; 耦合到所述第一终端和所述第二终端的第一组合逻辑设备，所述第一组合逻辑设备用于响应于接收到所述参考信号和所述第一目标信号而发送第一组合逻辑信号; 耦合用于接收所述延迟参考信号的选择装置，所述第一组合逻辑信号和第一同步信号，所述选择装置用于选择性地发送第二同步信号，并且其中选择性地发送所述第二同步信号减少所述参考信道和 第一个目标通道。
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公开(公告)号：US20100315919A1
公开(公告)日：2010-12-16
申请号：US12622586
申请日：2009-11-20
申请人： Akihiko Doi , Shengyuan Li
发明人： Akihiko Doi , Shengyuan Li
IPC分类号： G11B20/10
CPC分类号： G11B20/10009 , G11B20/10027 , G11B2020/10592 , G11B2220/2545 , G11B2220/2562
摘要： A current gain control system is described and comprises first and second gain blocks respectively associated with the first and second input channels, wherein first and second gain blocks transmit first and second gain signals in response to receiving first and second input signals; first and second converters adapted to be respectively coupled to the first and second gain blocks, the first and second converters operative for setting gains associated with the first and second input channel and for transmitting first and second converted signals in response to receiving the first and second gain signals; and first and second switches for selectively coupling the first and second converters to first and second channel drivers, respectively, wherein the first and second channel drivers transmit channel gain signals in response to receiving the first converted signal, and the channel gain signal allows control of the gain associated with the input channel.
摘要翻译： 描述当前增益控制系统，并且包括分别与第一和第二输入通道相关联的第一和第二增益块，其中响应于接收第一和第二输入信号，第一和第二增益块传输第一和第二增益信号; 第一和第二转换器适于分别耦合到第一和第二增益块，第一和第二转换器用于设置与第一和第二输入通道相关联的增益，并且用于响应于接收第一和第二增益块而发送第一和第二转换信号 增益信号; 以及分别用于将第一和第二转换器分别选择性地耦合到第一和第二通道驱动器的第一和第二开关，其中第一和第二通道驱动器响应于接收到第一转换信号而传输通道增益信号，并且通道增益信号允许控制 与输入通道相关的增益。
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公开(公告)号：USD698054S1
公开(公告)日：2014-01-21
申请号：US29417197
申请日：2012-03-30
申请人： Lin He , Jian Li , Shengyuan Li
设计人： Lin He , Jian Li , Shengyuan Li
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公开(公告)号：US08325583B2
公开(公告)日：2012-12-04
申请号：US12758160
申请日：2010-04-12
IPC分类号： G11B7/00
CPC分类号： G11B7/126 , G11B7/00456
摘要： An optical disk drive system associated with a laser diode is described. The optical disk drive system comprises a current generator for receiving input signals; a current switch coupled to receive timing signals; a current driver coupled to receive output signals from the current switch and the current generator, the current driver further comprising a driver with wave shape control selected from the group consisting of a laser diode read driver and a laser diode write driver, wherein the driver with shape control is operative for transmitting at least one output signal that is a scaled version of at least one of the output signals received from the current generator, wherein the current driver is operative for transmitting at least one output signal driving the laser diode.
摘要翻译： 描述了与激光二极管相关联的光盘驱动器系统。 光盘驱动系统包括用于接收输入信号的电流发生器; 耦合以接收定时信号的电流开关; 电流驱动器，其耦合以从电流开关和电流发生器接收输出信号，所述电流驱动器还包括从由激光二极管读取驱动器和激光二极管写入驱动器组成的组中选择的波形控制的驱动器，其中所述驱动器具有 形状控制用于发送至少一个输出信号，其是从电流发生器接收的至少一个输出信号的缩放版本，其中当前驱动器用于传输驱动该激光二极管的至少一个输出信号。
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