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公开(公告)号：US06597134B2
公开(公告)日：2003-07-22
申请号：US09859951
申请日：2001-05-17
IPC分类号： H02K2300
摘要： A pulse width modulation controller for a hard disc drive spindle motor controls the rapid spin up of the spindle motor from a stop condition to normal operating speed using a multi-level peak current limiting and six state commutation. At the beginning of each commutation state, peak motor current is limited to less than its steady state peak value for a selected number of pulses. The peak current target then returns its normal level for the remainder of the commutation state. By reducing the peak current target for several pulses after each commutation state change, the effective supply current spike at commutation is reduced or eliminated.
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2.发明授权Programmable pulse width modulated waveform generator for a spindle motor controller 有权用于主轴电机控制器的可编程脉宽调制波形发生器公开(公告)号：US06515443B2
公开(公告)日：2003-02-04
申请号：US09862776
申请日：2001-05-21
IPC分类号： G05B1128
CPC分类号： H02P6/085 , G05B11/28 , H02P6/10 , H02P2209/07
摘要： A motor controller for a three-phase spindle motor used in the hard disc drive provides pulse width modulated (PWM) signals used to drive the motor. The PWM signals have duty cycles which are a function of rotational position of the motor, a magnitude control signal, a stored set of main waveform coefficients, a stored set of modifier coefficients, and a modifier signal. By varying the modifier signal, the duty cycle of the PWM signals can be varied to adjust the shape of the motor current waveform to match the torque profile of the motor.
摘要翻译： 用于硬盘驱动器中的用于三相主轴电动机的电动机控制器提供用于驱动电动机的脉宽调制（PWM）信号。 PWM信号具有作为电动机的旋转位置，幅度控制信号，存储的主波形系数集合，存储的修正系数组和修改器信号的函数的占空比。 通过改变修正信号，可以改变PWM信号的占空比来调节电动机电流波形的形状以匹配电动机的转矩分布。
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公开(公告)号：US6020695A
公开(公告)日：2000-02-01
申请号：US360360
申请日：1999-07-23
CPC分类号： G11B19/20
摘要： A three-phase generator boost circuit for augmenting the back electromotive force produced by a spindle motor of a disk drive is disclosed. First and second nodes provide normal connection to a source of DC voltage for the spindle motor and a second motor connected between the first and second nodes. A commutator is connected to a sequencer to operate the spindle motor. In the event of catastrophic shutdown, two of the lower commutator switches are operated to short circuit the two stator coils having the highest and lowest voltages to store energy in the coils. The commutator switches are then operated to discharge current through the nodes to a storage capacitor for the second motor.
摘要翻译： 公开了一种用于增加由磁盘驱动器的主轴电机产生的反电动势的三相发电机升压电路。 第一和第二节点提供与用于主轴电动机的直流电压源的正常连接以及连接在第一和第二节点之间的第二电动机。 换向器连接到定序器以操作主轴电机。 在发生灾难性停机的情况下，两个较低的换向器开关被操作以使具有最高和最低电压的两个定子线圈短路以在线圈中存储能量。 然后操作换向器开关以将电流通过节点放电到用于第二电动机的存储电容器。
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公开(公告)号：US06667843B2
公开(公告)日：2003-12-23
申请号：US09797395
申请日：2001-03-01
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.
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5.发明授权Systems and methods for reduction of cross coupling in proximate signal lines 失效用于减少邻近信号线中的交叉耦合的系统和方法公开(公告)号：US08233229B2
公开(公告)日：2012-07-31
申请号：US11997129
申请日：2006-02-16
IPC分类号： G11B20/24
CPC分类号： G11B5/486 , G11B5/6064 , G11B5/607 , H04L25/0264
摘要： Various systems and methods for reducing cross coupling in proximate signals are disclosed. As one example, a system for reducing cross-coupling in adjacent signals that includes an active slew rate limiter circuit is disclosed. The active slew rate limiter circuit is operable to receive an input signal, and to provide an output signal based on the input signal with a controlled slew rate. In some cases, such systems may be included within a storage device that includes a read head. In such cases, the systems may operate to assure a substantially constant power dissipation within the read head.
摘要翻译： 公开了用于减少邻近信号中的交叉耦合的各种系统和方法。 作为一个示例，公开了一种用于减少包括有效转换速率限制器电路的相邻信号中的交叉耦合的系统。 有源转换速率限制器电路可操作以接收输入信号，并且以可控的转换速率提供基于输入信号的输出信号。 在一些情况下，这样的系统可以包括在包括读取头的存储设备内。 在这种情况下，系统可以操作以确保在读取头内的功率消耗基本上恒定。
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6.发明申请Systems and Methods for Reduction of Cross Coupling in Proximate Signal Lines 失效在近似信号线中减少交叉耦合的系统和方法公开(公告)号：US20080297093A1
公开(公告)日：2008-12-04
申请号：US11997129
申请日：2006-02-16
CPC分类号： G11B5/486 , G11B5/6064 , G11B5/607 , H04L25/0264
摘要： Various systems and methods for reducing cross coupling in proximate signals are disclosed. As one example, a system for reducing cross-coupling in adjacent signals that includes an active slew rate limiter circuit is disclosed. The active slew rate limiter circuit is operable to receive an input signal, and to provide an output signal based on the input signal with a controlled slew rate. In some cases, such systems may be included within a storage device that includes a read head. In such cases, the systems may operate to assure a substantially constant power dissipation within the read head.
摘要翻译： 公开了用于减少邻近信号中的交叉耦合的各种系统和方法。 作为一个示例，公开了一种用于减少包括有效转换速率限制器电路的相邻信号中的交叉耦合的系统。 有源转换速率限制器电路可操作以接收输入信号，并且以可控的转换速率提供基于输入信号的输出信号。 在一些情况下，这样的系统可以包括在包括读取头的存储设备内。 在这种情况下，系统可以操作以确保在读取头内的功率消耗基本上恒定。
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公开(公告)号：US5847551A
公开(公告)日：1998-12-08
申请号：US46850
申请日：1998-03-24
申请人： Suneel Arora , David W. Kelly
发明人： Suneel Arora , David W. Kelly
CPC分类号： H02J7/0065 , G05F1/59 , A61N1/3925
摘要： A voltage regulator in a battery powered device, such as an implantable cardiac defibrillator, provides regulated output voltage for other circuits. When large currents are drawn from the battery, such as during charging of defibrillation output capacitors, switches decouple the regulator from receiving power from the battery and couple the regulator to receive power from a stable boost output voltage generated by a boost converter. The regulator provides a stable regulated output voltage less noisy than the boost output voltage. Controlled switch conductances in the regulator provide operation over a wide range of output load currents.
摘要翻译： 电池供电设备中的电压调节器，例如可植入心脏除颤器，为其他电路提供稳压输出电压。 当电池从电池中抽出大电流时，例如在除颤输出电容器充电期间，开关将调节器与电池的接收功率分开，并将稳压器耦合到从升压转换器产生的稳定升压输出电压中接收电力。 稳压器提供的稳定输出电压比升压输出电压低。 调节器中的受控开关电导可在宽范围的输出负载电流下提供工作。
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公开(公告)号：US08044699B1
公开(公告)日：2011-10-25
申请号：US12804293
申请日：2010-07-19
申请人： David W. Kelly
发明人： David W. Kelly
IPC分类号： H03L5/00
CPC分类号： H03K19/017536 , H03K19/018521
摘要： A level-shift circuit translates a control signal to a level-shifted output. The level-shift circuit includes a pulse generator circuit for providing Set and Reset pulses based on the control signal and a level-shift circuit for translating the Set and Reset pulses to level-shifted Set and Reset pulses. First and second differential detectors are connected to monitor the level-shifted Set and Reset pulses to provide detection of communicated Set and Reset pulses despite the presence of transients in the level-shift circuit. A gate drive circuit employs the Set and Reset pulses communicated by the differential detectors to generate a gate drive signal.
摘要翻译： 电平移位电路将控制信号转换为电平移位输出。 电平移位电路包括用于基于控制信号提供置位和复位脉冲的脉冲发生器电路和用于将置位和复位脉冲转换为电平移位的置位和复位脉冲的电平移位电路。 连接第一和第二差分检测器以监视电平移位的置位和复位脉冲，以提供对电平移位电路中存在瞬变的传送的设置和复位脉冲的检测。 栅极驱动电路使用由差分检测器传送的置位和复位脉冲以产生栅极驱动信号。
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9.发明申请OUTPUT COMPENSATED VOLTAGE REGULATOR, AN IC INCLUDING THE SAME AND A METHOD OF PROVIDING A REGULATED VOLTAGE 有权输出补偿电压调节器，包括其的IC和提供调节电压的方法公开(公告)号：US20100090667A1
公开(公告)日：2010-04-15
申请号：US12250427
申请日：2008-10-13
申请人： Jeffrey A. Gleason , David W. Kelly , Paul Mazur
发明人： Jeffrey A. Gleason , David W. Kelly , Paul Mazur
IPC分类号： G05F1/00
CPC分类号： G05F1/56
摘要： A voltage regulator, a method of regulating voltage and an IC including a voltage regulator. In one embodiment, the voltage regulator includes: (1) a DC precision amplifier configured to generate a DC precision signal based on a reference voltage and a regulated output of the voltage regulator and (2) a response amplifier, coupled in parallel with the DC precision amplifier, configured to generate an error signal based on the reference voltage and the regulated output, the response amplifier further configured to generate the regulated output based on a regulating signal comprised of the error signal and the DC precision signal. The DC precision amplifier may be a CMOS amplifier and the response amplifier may be a NPN amplifier.
摘要翻译： 电压调节器，调节电压的方法和包括电压调节器的IC。 在一个实施例中，所述电压调节器包括：（1）DC精密放大器，被配置为基于所述电压调节器的参考电压和稳压输出产生DC精度信号;以及（2）响应放大器，其与所述DC 精密放大器，被配置为基于参考电压和调节输出产生误差信号，所述响应放大器还被配置为基于由所述误差信号和所述DC精度信号组成的调节信号来产生所述调节输出。 DC精密放大器可以是CMOS放大器，并且响应放大器可以是NPN放大器。
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10.发明授权Automatic sensitivity control in an implantable cardiac rhythm management system 失效植入式心律管理系统中的自动灵敏度控制
公开(公告)号：US5269300A
公开(公告)日：1993-12-14
申请号：US921661
申请日：1992-07-30
申请人： David W. Kelly , Carol G. Stadler , Robert Dreher
发明人： David W. Kelly , Carol G. Stadler , Robert Dreher
CPC分类号： A61N1/3704
摘要： A method and apparatus for automatically adjusting the sensing threshold in an automatic implantable cardioverter/defibrillator with pacing capability. Fixed sensitivity is used for a specified interval following each pacing pulse and automatic sensitivity adjustment is used when spontaneous cardiac depolarization is detected. For spontaneous cardiac depolarization, the sensing threshold is automatically adjusted to a value proportional to the amplitude of the sensed cardiac signal. The sensing threshold continuously decreases between sensed cardiac depolarizations, ensuring that a lower level cardiac signal will be detected. When a pacing pulse is delivered, the sensing threshold is set to a fixed value and held at that value for a predetermined period of time such that the sensing threshold will not be affected by the cardiac response evoked by the pacing pulse. At the end of the predetermined period of time, the sensing threshold is decreased as it would following a spontaneous cardiac depolarization.
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