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1. 发明授权

US08565048B1 Unipolar current driver 有权
标题翻译：单极电流驱动器
公开(公告)号：US08565048B1
公开(公告)日：2013-10-22
申请号：US13472448
申请日：2012-05-15
申请人： Ross S. Wilson , Jason P. Brenden , Xuemin Yang
发明人： Ross S. Wilson , Jason P. Brenden , Xuemin Yang
IPC分类号： G11B11/00 , H01S3/00
CPC分类号： G11B5/02 , G11B2005/0021 , H01S5/0427
摘要： Various embodiments of the present invention provide single-ended and differential current drivers for heat assisted magnetic recording and other applications. For example, a current driver is disclosed that includes an upper output terminal and lower output terminal, a number of current switches operable to selectively contribute electrical currents through the upper and lower output terminals, a control input for each of the current switches operable to control the electrical currents, and a voltage supply operable to establish a voltage across the upper and output terminals.
摘要翻译：本发明的各种实施例提供用于热辅助磁记录和其它应用的单端和差动电流驱动器。例如，公开了一种电流驱动器，其包括上部输出端子和下部输出端子，多个电流开关，其可操作以选择性地提供通过上部和下部输出端子的电流;每个电流开关的控制输入可操作以控制电流和可用于在上部和输出端子上建立电压的电压源。

2. 发明申请

US20090322266A1 Systems and Methods for Controlling a DC Motor 有权
标题翻译：控制直流电机的系统和方法
公开(公告)号：US20090322266A1
公开(公告)日：2009-12-31
申请号：US12374304
申请日：2006-09-26
申请人： James A. Dahlberg , Ross S. Wilson , Jason P. Brenden
发明人： James A. Dahlberg , Ross S. Wilson , Jason P. Brenden
IPC分类号： H02P6/20
CPC分类号： H02P6/08 , H02P6/18 , H02P6/185 , H02P6/22 , H02P23/22
摘要： Various systems and methods for controlling DC motors are disclosed herein. For example, one method provides for controlling a polyphase, brushless DC motor. The method includes providing a DC motor that has a plurality of phases. Such a DC motor operates by inducing a current in the plurality of phases in accordance with a plurality of commutation states. In the example, six commutation states are discussed, but fewer than or more than six commutation states may exist. The method further includes initializing a count, inducing a current in the plurality of phases in accordance with a first commutation state, and incrementing the count until the current achieves a threshold in the first commutation state. Then, a current is induced in the plurality of phases in accordance with a second commutation state, and the count is decremented until the current achieves the threshold in the second commutation state. The sign bit of the count is stored, and a desired initial commutation state is determined based at least in part on the sign bit of the count.
摘要翻译：本文公开了用于控制DC电动机的各种系统和方法。例如，一种方法用于控制多相无刷直流电动机。该方法包括提供具有多个相位的DC电动机。这样的直流电动机通过根据多个换向状态感应多相中的电流来进行工作。在该示例中，讨论了六个换向状态，但是可能存在少于或多于六个换向状态。该方法还包括初始化计数，根据第一换向状态诱发多个相位中的电流，并且增加计数直到电流达到第一换向状态的阈值。然后，根据第二换向状态在多相中感应出电流，并且减少计数直到电流在第二换向状态下达到阈值。存储计数的符号位，并且至少部分地基于计数的符号位来确定期望的初始换向状态。

3. 发明授权

US08013552B2 Systems and methods for controlling a DC motor 有权
标题翻译：用于控制直流电动机的系统和方法
公开(公告)号：US08013552B2
公开(公告)日：2011-09-06
申请号：US12374304
申请日：2006-09-26
申请人： James A. Dahlberg , Ross S. Wilson , Jason P. Brenden
发明人： James A. Dahlberg , Ross S. Wilson , Jason P. Brenden
IPC分类号： H02P6/04
CPC分类号： H02P6/08 , H02P6/18 , H02P6/185 , H02P6/22 , H02P23/22
摘要： Various systems and methods for controlling DC motors are disclosed herein. For example, one method provides for controlling a polyphase, brushless DC motor. The method includes providing a DC motor that has a plurality of phases. Such a DC motor operates by inducing a current in the plurality of phases in accordance with a plurality of commutation states. In the example, six commutation states are discussed, but fewer than or more than six commutation states may exist. The method further includes initializing a count, inducing a current in the plurality of phases in accordance with a first commutation state, and incrementing the count until the current achieves a threshold in the first commutation state. Then, a current is induced in the plurality of phases in accordance with a second commutation state, and the count is decremented until the current achieves the threshold in the second commutation state. The sign bit of the count is stored, and a desired initial commutation state is determined based at least in part on the sign bit of the count.
摘要翻译：本文公开了用于控制DC电动机的各种系统和方法。例如，一种方法用于控制多相无刷直流电动机。该方法包括提供具有多个相位的DC电动机。这样的直流电动机通过根据多个换向状态感应多相中的电流来进行工作。在该示例中，讨论了六个换向状态，但是可能存在少于或多于六个换向状态。该方法还包括初始化计数，根据第一换向状态诱发多个相位中的电流，并且增加计数直到电流达到第一换向状态的阈值。然后，根据第二换向状态在多相中感应出电流，并且减少计数直到电流在第二换向状态下达到阈值。存储计数的符号位，并且至少部分地基于计数的符号位来确定期望的初始换向状态。

4. 发明授权

US08774643B2 Optical source driver circuit having overshoot controller 失效
标题翻译：具有过冲控制器的光源驱动电路
公开(公告)号：US08774643B2
公开(公告)日：2014-07-08
申请号：US13525982
申请日：2012-06-18
申请人： Jason P. Brenden , Xuemin Yang , Cameron C. Rabe
发明人： Jason P. Brenden , Xuemin Yang , Cameron C. Rabe
IPC分类号： H04B10/04
CPC分类号： H01S5/042 , G11B7/1263 , G11B2005/0021
摘要： A driver circuit configured to generate a drive signal for an optical source comprises an overshoot controller that provides an amount of overshoot for a given logic state of the drive signal as a function of a duration of at least one previous logic state of the drive signal. The drive signal may alternate between a first logic state associated with a first operating mode of the optical source and a second logic state associated with a second operating mode of the optical source. The overshoot controller may be configured to provide amounts of overshoot for respective instances of the first logic state that are proportional to the durations of their respective immediately preceding second logic states. The driver circuit may be implemented in a heat-assisted magnetic recording system in which the optical source alternates between on and off states associated with respective magnetic write and magnetic read modes.
摘要翻译：被配置为产生用于光源的驱动信号的驱动器电路包括过冲控制器，该过冲控制器根据驱动信号的至少一个先前逻辑状态的持续时间，为驱动信号的给定逻辑状态提供过冲量。驱动信号可以在与光源的第一操作模式相关联的第一逻辑状态与与光源的第二操作模式相关联的第二逻辑状态之间交替。过冲控制器可以被配置为提供与第一逻辑状态相对应的相应实例的量，其与第二逻辑状态的持续时间成正比。驱动器电路可以在热辅助磁记录系统中实现，其中光源在与相应磁写和磁读取模式相关联的导通和截止状态之间交替。

5. 发明申请

US20130336663A1 OPTICAL SOURCE DRIVER CIRCUIT HAVING OVERSHOOT CONTROLLER 失效
标题翻译：具有海外控制器的光源驱动电路
公开(公告)号：US20130336663A1
公开(公告)日：2013-12-19
申请号：US13525982
申请日：2012-06-18
申请人： Jason P. Brenden , Xuemin Yang , Cameron C. Rabe
发明人： Jason P. Brenden , Xuemin Yang , Cameron C. Rabe
IPC分类号： H01S3/10 , G11B13/04 , H04B10/04 , G11B7/126
CPC分类号： H01S5/042 , G11B7/1263 , G11B2005/0021
摘要： A driver circuit configured to generate a drive signal for an optical source comprises an overshoot controller that provides an amount of overshoot for a given logic state of the drive signal as a function of a duration of at least one previous logic state of the drive signal. The drive signal may alternate between a first logic state associated with a first operating mode of the optical source and a second logic state associated with a second operating mode of the optical source. The overshoot controller may be configured to provide amounts of overshoot for respective instances of the first logic state that are proportional to the durations of their respective immediately preceding second logic states. The driver circuit may be implemented in a heat-assisted magnetic recording system in which the optical source alternates between on and off states associated with respective magnetic write and magnetic read modes.
摘要翻译：被配置为产生用于光源的驱动信号的驱动器电路包括过冲控制器，该过冲控制器根据驱动信号的至少一个先前逻辑状态的持续时间，为驱动信号的给定逻辑状态提供过冲量。驱动信号可以在与光源的第一操作模式相关联的第一逻辑状态与与光源的第二操作模式相关联的第二逻辑状态之间交替。过冲控制器可以被配置为提供与第一逻辑状态相对应的相应实例的量，其与第二逻辑状态的持续时间成正比。驱动器电路可以在热辅助磁记录系统中实现，其中光源在与相应磁写和磁读取模式相关联的导通和截止状态之间交替。

6. 发明授权

US07145742B2 Velocity controlled disk drive head retraction after power loss 有权
标题翻译：功率损耗后的速度控制磁盘驱动器头缩回
公开(公告)号：US07145742B2
公开(公告)日：2006-12-05
申请号：US10955713
申请日：2004-09-30
申请人： Jason P. Brenden , James A. Dahlberg
发明人： Jason P. Brenden , James A. Dahlberg
IPC分类号： G11B21/02
CPC分类号： G11B19/04 , G11B5/54 , G11B21/12
摘要： A control apparatus controls retraction of a device carried on a moveable member actuated by an electric motor after a sudden power loss. The control apparatus includes a measuring circuit for measuring a back electromotive force (back EMF) from the electric motor during a measuring phase. The control apparatus also includes a controller which receives the actual velocity and provides a command signal for controlling a magnitude of the drive current based on a commanded velocity and the actual velocity of the moveable member. The control apparatus further comprises a current control loop for providing a command current signal based on the current provided to the electric motor and the command signal, and for providing the electric motor with the drive current during a driving phase based on the command current signal.
摘要翻译：控制装置控制在突然断电后由电动机驱动的可移动部件上承载的装置的收回。控制装置包括用于在测量阶段期间从电动机测量反电动势（反电动势）的测量电路。控制装置还包括控制器，其接收实际速度并提供用于基于指令速度和可移动构件的实际速度来控制驱动电流的大小的命令信号。控制装置还包括电流控制回路，用于基于提供给电动机的电流和指令信号提供指令电流信号，并且用于在驱动阶段期间基于指令电流信号向电动机提供驱动电流。

7. 发明授权

US06667843B2 Integrated programmable error amplifier 有权
公开(公告)号：US06667843B2
公开(公告)日：2003-12-23
申请号：US09797395
申请日：2001-03-01
申请人： Robert A. Norman , David W. Kelly , Jason P. Brenden
发明人： Robert A. Norman , David W. Kelly , Jason P. Brenden
IPC分类号： G11B502
CPC分类号： G11B5/5521
摘要： An error amplifier for use in a disk drive actuator system having an actuator motor for radially positioning a transducing head with respect to a rotatable disk is newly designed to enable full implementation as an integrated circuit. The error amplifier includes a switched-capacitor proportional-integral controller for comparing first and second differential input signals representing a respective actual current and commanded current for driving the actuator motor, and providing a differential output signal. A transconductor-capacitor filter is connected to filter the differential output signal of the switched-capacitor integrator, and provides a motor control signal to control the actuator motor.

8. 发明申请

US20140036945A1 SHARED THRESHOLD/UNDERSHOOT LASER OUTPUT DRIVER 有权
标题翻译：共享阈值/下层激光输出驱动器
公开(公告)号：US20140036945A1
公开(公告)日：2014-02-06
申请号：US13564009
申请日：2012-08-01
申请人： Cameron C. Rabe , Jason P. Brenden
发明人： Cameron C. Rabe , Jason P. Brenden
IPC分类号： H01S3/13
CPC分类号： H01S5/0428
摘要： A laser driver apparatus, system, and method include a single laser driver. One or more threshold levels and one or more undershoot levels can be digitally combined into a single output with respect to the single laser driver to reduce the output capacitance of the single laser driver and minimize circuit power, resulting in a faster and higher fidelity signal thereof. A decoder (e.g., thermometer decoding) can also be provided, wherein the threshold level(s) and the undershoot level(s) are thermometer decoded via the decoder.
摘要翻译：激光驱动装置，系统和方法包括单个激光驱动器。一个或多个阈值电平和一个或多个下冲电平可以相对于单个激光驱动器数字地组合成单个输出，以减小单个激光驱动器的输出电容并最小化电路功率，从而产生更快和更高的保真度信号。还可以提供解码器（例如，温度计解码），其中阈值电平和下冲电平经由解码器温度计解码。

9. 发明授权

US06784698B1 Sense amplifier with improved common mode rejection 有权
标题翻译：具有改进的共模抑制的感应放大器
公开(公告)号：US06784698B1
公开(公告)日：2004-08-31
申请号：US10459058
申请日：2003-06-11
申请人： Jason P. Brenden
发明人： Jason P. Brenden
IPC分类号： G01R1900
CPC分类号： H03F3/3062 , H03F3/45183 , H03F3/45192 , H03F3/45654 , H03F2203/45352 , H03F2203/45392 , H03F2203/45574
摘要： A sense amplifier having improved common mode rejection has a differential input and a differential output. A first level shifting transconductance circuit is connected to receive the differential input. A gain and compensation circuit is connected to the level shifting transconductance circuit, and a buffer is connected to the gain and compensation circuit. The differential output of the sense amplifier is taken at an output of the buffer. A feedback network is connected between the output of the buffer and an input of the gain and compensation circuit. The feedback network includes a divider circuit connected to the output of the buffer and a second level shifting transconductance circuit connected between the divider circuit and the input of the gain and compensation circuit. The first and second level shifting transconductance circuits are preferably matched to one another for distortion cancellation.
摘要翻译：具有改进的共模抑制的读出放大器具有差分输入和差分输出。连接第一级移动跨导电路以接收差分输入。增益和补偿电路连接到电平转换跨导电路，缓冲器连接到增益和补偿电路。读出放大器的差分输出在缓冲器的输出处获取。反馈网络连接在缓冲器的输出和增益和补偿电路的输入之间。反馈网络包括连接到缓冲器的输出的分频器电路和连接在分频器电路和增益和补偿电路的输入端之间的第二电平移动跨导电路。优选地，第一和第二电平移动跨导电路彼此匹配用于失真消除。

10. 发明授权

US07106022B2 Velocity controlled disk drive head retraction with offset removal 有权
标题翻译：速度控制磁盘驱动器头缩回，带偏移移除
公开(公告)号：US07106022B2
公开(公告)日：2006-09-12
申请号：US10955715
申请日：2004-09-30
申请人： Jason P. Brenden , James A. Dahlberg
发明人： Jason P. Brenden , James A. Dahlberg
IPC分类号： G01V3/02 , G05B11/01
CPC分类号： G11B5/54
摘要： A control apparatus controls retraction of a device carried on a moveable member actuated by an electric motor. The control apparatus includes a measuring circuit with an output during a measuring phase including a back electromotive force (back EMF) from the electric motor plus a measuring circuit offset voltage. The control apparatus also includes an offset removing circuit connected to the output of the measuring circuit. The back EMF from the electric motor is provided at the output of the offset removing circuit. A driver circuit is connected to terminals of the electric motor for providing the electric motor with a drive current during a driving phase with a magnitude based on the back EMF from the electric motor.
摘要翻译：控制装置控制由电动机驱动的可移动构件上承载的装置的缩回。控制装置包括测量电路，该测量电路在测量阶段具有包括来自电动机的反电动势（反电动势）加上测量电路偏置电压的测量阶段的输出。控制装置还包括与测量电路的输出连接的偏移消除电路。来自电动机的反电动势被提供在偏移消除电路的输出端。驱动电路连接到电动机的端子，用于在驱动阶段向电动机提供基于来自电动机的反电动势的幅度的驱动电流。

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