-
公开(公告)号：US20130039373A1
公开(公告)日：2013-02-14
申请号：US13595670
申请日：2012-08-27
申请人： Douglas Warren Dean
发明人： Douglas Warren Dean
IPC分类号： H01S3/10
CPC分类号： G11B7/126 , H01S5/0428
摘要： A laser diode read driver includes a first transistor producing a first voltage in response to receiving a first current signal. A transconductor has a first input coupled to receive the first voltage and produces a second current signal in response to differences between signals received on the first input and a second input. A second transistor is coupled to the second input and produces a third current signal in response to receiving the second current signal. A third transistor is coupled to the second transistor and the second input and produces an output current signal in response to receiving the third current signal. The first transistor is scaled to the first transistor by the inverse of a gain factor. First and second resistors are coupled between the first and third transistors and a low voltage supply, and are scaled to each other by the gain factor.
摘要翻译： 激光二极管读取驱动器包括响应于接收到第一电流信号而产生第一电压的第一晶体管。 跨导体具有耦合以接收第一电压的第一输入，并且响应于在第一输入和第二输入之间接收的信号之间的差异产生第二电流信号。 第二晶体管耦合到第二输入，并且响应于接收到第二电流信号而产生第三电流信号。 第三晶体管耦合到第二晶体管和第二输入，并且响应于接收到第三电流信号而产生输出电流信号。 第一晶体管通过增益因子的倒数被缩放到第一晶体管。 第一和第二电阻器耦合在第一和第三晶体管和低电压电源之间，并且通过增益因子彼此缩放。
-
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。
-
公开(公告)号：US5880626A
公开(公告)日：1999-03-09
申请号：US757117
申请日：1996-12-02
申请人： Douglas Warren Dean
发明人： Douglas Warren Dean
CPC分类号： G11B5/022 , G11B5/012 , G11B5/02 , G11B5/09 , H03F3/3081
摘要： An active damping system for reducing the ringing effects in write current signals flowing through a write head of a disk drive write circuit. The active damping system stores a voltage related to the write current, sinks write current from a terminal of the write head in response to a predetermined rate of increase in the stored voltage, and provides a high impedance to the terminal when the rate of increase of stored voltage is below the predetermined rate. The active damping system preferably includes a transistor connected between the write head terminal and a common electrical potential, a capacitor connected between the terminal and a base of the transistor, and a resistor connected between the base of the transistor and the common electrical potential.
摘要翻译： 一种主动阻尼系统，用于减少流经磁盘驱动器写入电路的写入头的写入电流信号的振铃效应。 主动阻尼系统存储与写入电流相关的电压，响应于所存储的电压的预定增加速率而从写入头的端子吸收写入电流，并且当增加的速率增加时向终端提供高阻抗 存储电压低于预定速率。 主动阻尼系统优选地包括连接在写头终端和公共电位之间的晶体管，连接在晶体管的端子和基极之间的电容器，以及连接在晶体管的基极和公共电位之间的电阻器。
-
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。
-
公开(公告)号：US20130076266A1
公开(公告)日：2013-03-28
申请号：US13245268
申请日：2011-09-26
CPC分类号： H01S5/06817 , G11B7/126 , H01S5/042 , H01S5/06825 , H03K5/086 , H03K5/12 , H03K17/60
摘要： A damping circuit having an input terminal and an output terminal is described. The damping circuit comprises a driver having an input and an output; an RC circuit coupled between the input terminal and the output; and a resistor coupled between the output and the output terminal, wherein the RC circuit delays passing a signal from the output terminal to the input terminal and a low impedance associated with the driver generally reduces ringing.
摘要翻译： 描述了具有输入端子和输出端子的阻尼电路。 阻尼电路包括具有输入和输出的驱动器; 耦合在输入端和输出端之间的RC电路; 以及耦合在输出端和输出端之间的电阻器，其中RC电路将来自输出端的信号延迟到输入端，并且与驱动器相关联的低阻抗通常减少振铃。
-
公开(公告)号：US07652537B2
公开(公告)日：2010-01-26
申请号：US12104849
申请日：2008-04-17
申请人： Tuan Van Ngo , Douglas Warren Dean
发明人： Tuan Van Ngo , Douglas Warren Dean
IPC分类号： H03G3/00
CPC分类号： H03F3/45089 , H03F1/56 , H03F3/72 , H03F2203/45671 , H03F2203/45702 , H03F2203/45722 , H03F2203/45726
摘要： One embodiment of the invention includes an amplifier system. The amplifier system comprises an amplifier stage configured to receive an input signal at an amplifier input and to provide an amplified output signal. The amplifier system also comprises a programmable input impedance stage comprising a plurality of transconductance stages. At least one of the plurality of transconductance stages can be selectively activated based on a selection signal, the at least one of the activated transconductance stages providing current through the amplifier input that adjusts an impedance associated with the amplifier input based on the amplified output signal.
摘要翻译： 本发明的一个实施例包括放大器系统。 放大器系统包括放大器级，其被配置为在放大器输入处接收输入信号并提供放大的输出信号。 放大器系统还包括可编程输入阻抗级，其包括多个跨导级。 可以基于选择信号选择性地激活多个跨导级中的至少一个，所激活的跨导级中的至少一个提供通过放大器输入的电流，其基于放大的输出信号调整与放大器输入相关联的阻抗。
-
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。
-
公开(公告)号：US08406263B2
公开(公告)日：2013-03-26
申请号：US13595670
申请日：2012-08-27
申请人： Douglas Warren Dean
发明人： Douglas Warren Dean
IPC分类号： H01S3/00
CPC分类号： G11B7/126 , H01S5/0428
摘要： A laser diode read driver includes a first transistor producing a first voltage in response to receiving a first current signal. A transconductor has a first input coupled to receive the first voltage and produces a second current signal in response to differences between signals received on the first input and a second input. A second transistor is coupled to the second input and produces a third current signal in response to receiving the second current signal. A third transistor is coupled to the second transistor and the second input and produces an output current signal in response to receiving the third current signal. The first transistor is scaled to the first transistor by the inverse of a gain factor. First and second resistors are coupled between the first and third transistors and a low voltage supply, and are scaled to each other by the gain factor.
摘要翻译： 激光二极管读取驱动器包括响应于接收到第一电流信号而产生第一电压的第一晶体管。 跨导体具有耦合以接收第一电压的第一输入，并且响应于在第一输入和第二输入之间接收的信号之间的差异产生第二电流信号。 第二晶体管耦合到第二输入，并且响应于接收到第二电流信号而产生第三电流信号。 第三晶体管耦合到第二晶体管和第二输入，并且响应于接收到第三电流信号而产生输出电流信号。 第一晶体管通过增益因子的倒数被缩放到第一晶体管。 第一和第二电阻器耦合在第一和第三晶体管和低电压电源之间，并且通过增益因子彼此缩放。
-
公开(公告)号：US08300510B1
公开(公告)日：2012-10-30
申请号：US13098100
申请日：2011-04-29
申请人： Douglas Warren Dean
发明人： Douglas Warren Dean
IPC分类号： G11B11/00
CPC分类号： G11B7/1263
摘要： A laser diode write driver is described. This laser diode write driver comprises: a feedback loop coupled for receiving an input current signal, the feedback loop operative for reaching a steady state and comprising a Class AB driver in series with a Class A driver, wherein the feedback loop transmits a first current signal; a current mirror adapted to receive the first current signal, the current mirror operative for replicating the first current signal and transmitting a second current signal; a differential device adapted to receive the second current signal, the differential device operative for steering current in at least one direction and transmitting a first voltage signal; a second class AB driver adapted to receive the first voltage signal and transmit a first drive signal, a second Class A driver adapted to receive the first drive signal and transmit a second drive signal; and an output device coupled to the second drive signal and operative for transmitting a driver output signal that drives the light source in response to receiving the second drive signal.
摘要翻译： 描述了激光二极管写驱动器。 该激光二极管写入驱动器包括：耦合的用于接收输入电流信号的反馈回路，所述反馈回路用于达到稳定状态并且包括与A类驱动器串联的AB类驱动器，其中所述反馈回路传输第一电流信号 ; 电流镜，适于接收第一电流信号，电流镜用于复制第一电流信号并发送第二电流信号; 适于接收第二电流信号的差分装置，所述差分装置用于在至少一个方向上转向电流并传输第一电压信号; 适于接收第一电压信号并传输第一驱动信号的第二类AB驱动器，适于接收第一驱动信号并发送第二驱动信号的第二类A驱动器; 以及输出装置，其耦合到所述第二驱动信号，并且用于响应于接收到所述第二驱动信号而传输驱动所述光源的驱动器输出信号。
-
公开(公告)号：US20100315918A1
公开(公告)日：2010-12-16
申请号：US12758160
申请日：2010-04-12
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，该至少一个输出信号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。
-
-
-
-
-
-
-
-
-
搜索结果
16 条记录 (耗时 0.016 秒)
