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1. 发明授权

US09245540B1 Voice coil motor temperature sensing circuit to reduce catastrophic failure due to voice coil motor coil shorting to ground 有权
标题翻译：音圈电机温度检测电路可减少由于音圈电机线圈短路而造成的灾难性故障
公开(公告)号：US09245540B1
公开(公告)日：2016-01-26
申请号：US14526618
申请日：2014-10-29
申请人： Western Digital Technologies, Inc.
发明人： John R. Agness , William K. Laird
IPC分类号： G11B5/02 , G11B5/55 , H02H3/08 , G11B5/40
CPC分类号： G11B5/022 , G05F1/463 , G11B5/40 , G11B5/5565 , G11B19/046 , H02H3/085 , H02H5/048
摘要： An electrical circuit includes: a controlled switch; one or more temperature sensors in thermal contact with the controlled switch; and a control unit configured to: receive a temperature signal from the one or more temperature sensors; compare the received temperature signal to a predetermined threshold; and in response to the received temperature signal exceeding the predetermined threshold, render the controlled switch inoperative.
摘要翻译：电路包括：受控开关; 与受控开关热接触的一个或多个温度传感器; 以及控制单元，被配置为：从所述一个或多个温度传感器接收温度信号; 将接收到的温度信号与预定阈值进行比较; 并且响应于所接收的温度信号超过预定阈值，使受控开关不起作用。

2. 发明授权

US09236067B2 Method and apparatus for speed control of voice coil motor retract operation dependent upon available power 有权
标题翻译：根据可用功率，音圈电机缩回操作的速度控制方法和装置
公开(公告)号：US09236067B2
公开(公告)日：2016-01-12
申请号：US13956484
申请日：2013-08-01
申请人： STMicroelectronics Asia Pacific Pte. Ltd.
发明人： Lorenzo Ferrario , Kaufik Linggajaya
IPC分类号： H02P6/18 , G11B5/02
CPC分类号： G11B5/022
摘要： The back EMF (BEMF) of a motor is sensed and compared to a target back EMF (BEMF) to generate an error control signal. The circuit supply voltage is also sensed. A PWM motor control signal is generated in response to a comparison of the error control signal to a ramp signal having a variable slope. The variable slope is selected in response to the sensed circuit supply voltage. The motor is then driven in response to the PWM control signal. The sign of the error control signal is used to selectively short one of motor terminals to a reference voltage supply node while the other motor terminal is driven in response to the PWM control signal.
摘要翻译：电动机的反电动势（BEMF）被感测并与目标反电动势（BEMF）进行比较以产生误差控制信号。还检测电路电源电压。响应于误差控制信号与具有可变斜率的斜坡信号的比较，产生PWM电动机控制信号。响应于检测到的电路电源电压选择可变斜率。然后根据PWM控制信号驱动电机。误差控制信号的符号用于选择性地将一个电动机端子短路到参考电压供应节点，同时响应于PWM控制信号驱动另一个电动机端子。

3. 发明授权

US09196265B2 Disk-drive pulse duration control system 有权
标题翻译：磁盘驱动脉冲持续时间控制系统
公开(公告)号：US09196265B2
公开(公告)日：2015-11-24
申请号：US13875862
申请日：2013-05-02
申请人： TEXAS INSTRUMENTS INCORPORATED
发明人： Marius Vicentiu Dina , Jeremy Robert Kuehlwein
IPC分类号： G11B5/09 , G11B5/02
CPC分类号： G11B5/09 , G11B5/02 , G11B5/022
摘要： One embodiment includes a pulse duration control system for a magnetic disk-drive system. A rise delay system generates first control voltages in response to a write data input signal changing between a first state and a second state. A fall delay system generates second control voltages in response to the write data input signal changing between the first and second states. A comparator system generates a rising-edge overshoot signal and a falling-edge overshoot signal based on a comparison of the first and second control voltages. The rising-edge overshoot signal can set a duration of a positive overshoot current pulse for a write current at a transition of the write data input signal from the first state to the second state, and the falling-edge overshoot signal can set a duration of a negative overshoot current pulse for the write current at a transition from the second state to the first state.
摘要翻译：一个实施例包括用于磁盘驱动系统的脉冲持续时间控制系统。上升延迟系统响应于写入数据输入信号在第一状态和第二状态之间变化而产生第一控制电压。响应于写入数据输入信号在第一和第二状态之间变化，跌落延迟系统产生第二控制电压。比较器系统基于第一和第二控制电压的比较产生上升沿过冲信号和下降沿过冲信号。上升沿过冲信号可以在写入数据输入信号从第一状态到第二状态的转变时为写入电流设置正过冲电流脉冲的持续时间，并且下降沿过冲信号可以设置持续时间在从第二状态到第一状态的转变时，用于写入电流的负的过冲电流脉冲。

4. 发明授权

US08792197B1 Storage device with driver controller providing pattern-dependent write functionality 有权
标题翻译：具有驱动器控制器的存储设备，提供与模式相关的写入功能
公开(公告)号：US08792197B1
公开(公告)日：2014-07-29
申请号：US14074325
申请日：2013-11-07
申请人： LSI Corporation
发明人： Ross S. Wilson , Jason P. Brenden , Paul Mazur , Cameron C. Rabe , Gang Chen
IPC分类号： G11B5/09 , G11B5/02
CPC分类号： G11B5/02 , G11B5/022 , G11B20/10009
摘要： A hard disk drive or other storage device comprises a storage medium, a write head, and control circuitry coupled to the write head. The control circuitry comprises a write driver configured to generate a write signal comprising write pulses responsive to write data, and a driver controller configured to adjust overshoot amplitudes of respective ones of the write pulses utilizing a segmented digital-to-analog converter. The overshoot amplitudes are adjusted by detecting patterns in the write data, decoding a first portion of a base overshoot value to identify a corresponding number of base overshoot segments, combining the base overshoot value and a differential overshoot value, decoding a first portion of the combined base overshoot and differential overshoot values to identify a corresponding number of enhanced overshoot segments, and selecting between the number of base overshoot segments and the number of enhanced overshoot segments responsive to detection of a particular pattern.
摘要翻译：硬盘驱动器或其他存储设备包括存储介质，写入头和耦合到写入头的控制电路。控制电路包括一个写入驱动器，该写入驱动器经配置以产生写入信号，该写入信号包括响应于写入数据的写入脉冲，以及驱动器控制器，配置为利用分段的数模转换器来调整相应写入脉冲的过冲幅度。通过检测写入数据中的图形来调整过冲幅度，对基本过冲值的第一部分进行解码以识别相应数量的基极过冲段，组合基极过冲值和差分过冲值，对组合的第一部分进行解码基极过冲和差分过冲值，以识别相应数量的增强过冲段，并且响应于特定模式的检测，在基极过冲段的数量和增强的过冲段之间进行选择。

5. 发明授权

US08643973B2 Method and apparatus for reflection cancellation 有权
标题翻译：反射消除的方法和装置
公开(公告)号：US08643973B2
公开(公告)日：2014-02-04
申请号：US13281278
申请日：2011-10-25
申请人： Rajarshi Mukhopadhyay , Scott G. Sorenson , Marco Corsi , Paul M. Emerson
发明人： Rajarshi Mukhopadhyay , Scott G. Sorenson , Marco Corsi , Paul M. Emerson
IPC分类号： G11B5/02
CPC分类号： G11B5/022 , G11B2005/001
摘要： A method for calibrating a reflection compensator is provided. A delay is initially set to a predetermined minimum, and an input pulse is transmitted across a transmission line. A compensation current is then applied after the delay. The reflection from the transmission line is digitized to generate a measurement, and a determination is made as to whether the compensation current substantially compensates for the reflection. If the compensation current does not substantially compensate for the reflection, then the delay is adjusted, and the process is repeated until the compensation current substantially compensates for the reflection.
摘要翻译：提供了一种用于校准反射补偿器的方法。最初将延迟设定为预定的最小值，并且在传输线上传输输入脉冲。然后在延迟之后施加补偿电流。来自传输线的反射被数字化以产生测量，并且确定补偿电流是否基本上补偿反射。如果补偿电流基本上不补偿反射，则调整延迟，并重复该过程，直到补偿电流基本上补偿反射。

6. 发明申请

US20100244761A1 DEVICE TO SYNCHRONIZE THE CHANGE OF THE DRIVING MODE OF AN ELECTROMAGNETIC LOAD 有权
标题翻译：设备同步电磁负载驱动模式的变化
公开(公告)号：US20100244761A1
公开(公告)日：2010-09-30
申请号：US12751807
申请日：2010-03-31
申请人： Ezio Galbiati , Roberto Peritore , Michele Bartolini , Agostino Mirabelli
发明人： Ezio Galbiati , Roberto Peritore , Michele Bartolini , Agostino Mirabelli
IPC分类号： G05B11/28 , H01F27/42
CPC分类号： H02P6/08 , G11B5/022 , G11B5/5547 , H02P6/085 , H02P6/22 , H02P25/034
摘要： A device for the change of the driving mode of an electromagnetic load from a first operating mode with pulse width modulation to a second operating mode that is linear by means of switching circuits. During a first operating mode, each of two outputs has a voltage value ranging from a first reference voltage to a second reference voltage. The device adapted to synchronize a change command signal from a first operating mode to a second operating mode of the electromagnetic load with the signal representative of the flow of current circulating within the load at substantially its average value and adapted to generate a first command signal in response to the synchronization.
摘要翻译：一种用于将电磁负载的驱动模式从具有脉冲宽度调制的第一操作模式改变为通过开关电路线性化的第二操作模式的装置。在第一操作模式期间，两个输出中的每一个具有从第一参考电压到第二参考电压的电压值。该装置适于使来自第一操作模式的改变命令信号与电磁负载的第二操作模式同步，该信号表示在负载中以基本上其平均值循环的电流流，并适于产生第一命令信号响应同步。

7. 发明授权

US07656111B1 Low power preamplifier writer architecture 有权
标题翻译：低功率前置放大器写入器架构
公开(公告)号：US07656111B1
公开(公告)日：2010-02-02
申请号：US12186359
申请日：2008-08-05
申请人： Sang Kong Chan , Kien Beng Tan , Xiao Yu Miao
发明人： Sang Kong Chan , Kien Beng Tan , Xiao Yu Miao
IPC分类号： H02P6/06
CPC分类号： G11B5/09 , G11B5/022
摘要： A circuit is adapted to activate a writer head of a data storage media drive during both the boost periods as well as the steady state periods. The current supplied to the writer head during the boost periods exceeds the steady state current and flows between positive and negative voltage supplies so as to provide the required magnetic flux change in the inductor disposed in the write head. During the steady state periods, a switch circuit is turned on to provide a second current path across the writer head. During the steady state periods, the current flows between the positive voltage supply and the ground to reduce power consumption. The switch circuit is turned off during the boost periods.
摘要翻译：电路适于在升压期间和稳定状态期间激活数据存储介质驱动器的写入头。在升压期间提供给写入头的电流超过稳态电流，并且在正和负电压源之间流动，以便在设置在写入头中的电感器中提供所需的磁通量变化。在稳定状态期间，开关电路导通以提供穿过写入头的第二电流路径。在稳态期间，电流在正电源和地之间流动，以降低功耗。开关电路在升压期间关闭。

8. 发明申请

US20090284863A1 MAGNETIC RECORDING CIRCUIT, MAGNETIC RECORDING DEVICE, AND INFORMATION RECORDING METHOD 审中-公开
标题翻译：磁记录电路，磁记录装置和信息记录方法
公开(公告)号：US20090284863A1
公开(公告)日：2009-11-19
申请号：US12510711
申请日：2009-07-28
申请人： Hiroshi Uno
发明人： Hiroshi Uno
IPC分类号： G11B21/02
CPC分类号： G11B5/09 , G11B5/02 , G11B5/022
摘要： A magnetic recording circuit includes a write amplifier that supplies a recording current to a magnetic recording head, and switches a direction of the recording current in accordance with information. The magnetic recording circuit further includes a control circuit that adjusts a rising speed of the recording current.
摘要翻译：磁记录电路包括写入放大器，其向磁记录头提供记录电流，并根据信息切换记录电流的方向。磁记录电路还包括调节记录电流的上升速度的控制电路。

9. 发明授权

US07576939B2 Discontinuous mode back EMF measurement 有权
标题翻译：不连续模式反电动势测量
公开(公告)号：US07576939B2
公开(公告)日：2009-08-18
申请号：US11940521
申请日：2007-11-15
申请人： KianKeong Ooi , KeXiu Liu , Shuyu Cao , MingZhong Ding
发明人： KianKeong Ooi , KeXiu Liu , Shuyu Cao , MingZhong Ding
IPC分类号： G11B21/02
CPC分类号： H02P6/182 , G11B5/022 , G11B5/5526 , G11B5/59605
摘要： A terminal voltage of an actuator motor is measured while the actuator motor is in a high impedance state. An internal voltage of the actuator motor is measured, and a back-EMF voltage of the actuator motor is estimated in response to the terminal voltage of the actuator motor and the internal voltage of the actuator motor. A drive current supplied to the actuator motor is controlled in response to the estimated back-EMF.
摘要翻译：在执行器电动机处于高阻抗状态的同时测量致动器电动机的端子电压。测量致动器电动机的内部电压，并且响应于致动器电动机的端子电压和致动器电动机的内部电压来估计致动器电动机的反电动势电压。响应于估计的反电动势来控制提供给致动器电动机的驱动电流。

10. 发明申请

US20080290908A1 Variable Power Write Driver Circuit 有权
标题翻译：可变功率写入驱动器电路
公开(公告)号：US20080290908A1
公开(公告)日：2008-11-27
申请号：US11752795
申请日：2007-05-23
申请人： Larry L. Tretter
发明人： Larry L. Tretter
IPC分类号： H03K3/00
CPC分类号： G11B5/09 , G11B5/022
摘要： A storage system (e.g., a magnetic disk system or a magnetic tape system) employing a write head, a write controller and a write driver circuit. In operation, the write head records data on a magnetic media (e.g., a magnetic tape or a magnetic disk) based on a flow of a write current through the write head, and the write driver circuit includes a variable power supply network and a variable power return network driving the write current through the write head based on a selection by the write controller of an operating power mode among a plurality of selectable power modes of the variable power supply network and the variable power return network. Each power mode of the variable power supply network and the variable power return network drives the write current with a different magnitude from the variable power supply network through the write head to the variable power return network.
摘要翻译：采用写入头，写入控制器和写入驱动器电路的存储系统（例如，磁盘系统或磁带系统）。在操作中，写入头基于通过写入头的写入电流的流动将数据记录在磁性介质（例如，磁带或磁盘）上，并且写入驱动器电路包括可变电源网络和可变电源功率返回网络基于写入控制器在可变供电网络和可变功率返回网络的多个可选功率模式中的操作功率模式的选择来驱动写入电流。可变供电网络和可变功率回流网络的每个功率模式通过写入头向可变功率返回网络驱动具有与可变供电网络不同大小的写入电流。

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