公开(公告)号：US08279727B1

公开(公告)日：2012-10-02

申请号：US12350732

申请日：2009-01-08

Applicant: Siew Yong Chui ,  Rudy Kurniawan ,  Cheng Yong Teoh

Inventor： Siew Yong Chui ,  Rudy Kurniawan ,  Cheng Yong Teoh

IPC: G11B7/00 ,  G11B5/09 ,  G11B15/18

CPC classification number: G11B19/28

Abstract: In one embodiment the present invention includes a circuit comprising a switch and a switch driver. The switch is configured to provide synchronous rectification switching of a back-EMF voltage. The synchronous rectification switching produces a source voltage. The switch driver is configured to receive the back-EMF voltage and the source voltage. The switch driver provides a control signal to a control terminal of the switch. The control signal has a frequency. The frequency is used to control an amount of the synchronous rectification switching. Accordingly, the frequency reduces a dissipated power associated with the synchronous rectification switching.

Abstract translation: 在一个实施例中，本发明包括一个包括开关和开关驱动器的电路。 开关配置为提供反电动势电压的同步整流开关。 同步整流开关产生源电压。 开关驱动器被配置为接收反电动势电压和源电压。 开关驱动器向开关的控制端提供控制信号。 控制信号具有频率。 该频率用于控制同步整流切换的量。 因此，频率降低与同步整流切换相关联的耗散功率。

公开(公告)号：US08129969B1

公开(公告)日：2012-03-06

申请号：US11595142

申请日：2006-11-09

Applicant: Siew Yong Chui ,  Ravishanker Krishnamoorthy ,  Ying Tian Li

Inventor： Siew Yong Chui ,  Ravishanker Krishnamoorthy ,  Ying Tian Li

IPC: G05F1/00

CPC classification number: H02M3/157

Abstract: A voltage regulator includes a converter module, N comparators, and a decoder module. The converter module includes (N+1) resistors connected in series between a supply voltage and a common voltage, where N is an integer greater than 1. Each of the (N+1) resistors has a value that is different than values of others of the (N+1) resistors. The N comparators have first inputs connected to a reference voltage, and second inputs respectively connected to N nodes between the (N+1) resistors. The decoder module receives outputs of the N comparators and generates an R-bit output, where R is an integer greater than 1. Each bit of the R-bit output indicates a different one of R voltage ranges. A present value of the supply voltage lies in one of the R voltage ranges.

Abstract translation: 电压调节器包括转换器模块，N个比较器和解码器模块。 转换器模块包括串联在电源电压和公共电压之间的（N + 1）个电阻器，其中N是大于1的整数。（N + 1）个电阻器中的每一个都具有与其他电阻值不同的值 的（N + 1）个电阻。 N个比较器具有连接到参考电压的第一输入，以及分别连接到（N + 1）个电阻之间的N个节点的第二输入。 解码器模块接收N个比较器的输出并产生R位输出，其中R是大于1的整数.R位输出的每个位表示R电压范围中的不同的一个。 电源电压的当前值位于R电压范围之一。

公开(公告)号：US20120025806A1

公开(公告)日：2012-02-02

申请号：US13190782

申请日：2011-07-26

Applicant: Siew Yong CHUI ,  Rajesh Tiruvuru

Inventor： Siew Yong CHUI ,  Rajesh Tiruvuru

IPC: G01R19/00

CPC classification number: G01R19/2506 ,  G01R19/2513 ,  H02M1/4208 ,  Y02B70/126

Abstract: Aspects of the disclosure provide method and apparatus for detecting attributes of an input power supply. The method includes receiving a first signal generated based on a second signal that is predictive. The first signal includes a portion that substantially corresponds to the second signal. Further, the method includes detecting attributes of the portion of the first signal that substantially corresponds to the second signal, and determining attributes of the second signal based on the attributes of the portion of the first signal that substantially corresponds to the second signal.

Abstract translation: 本公开的方面提供了用于检测输入电源的属性的方法和装置。 该方法包括接收基于预测的第二信号产生的第一信号。 第一信号包括基本对应于第二信号的部分。 此外，该方法包括检测基本上对应于第二信号的第一信号的部分的属性，以及基于与第二信号基本对应的第一信号的部分的属性来确定第二信号的属性。

公开(公告)号：US08107187B1

公开(公告)日：2012-01-31

申请号：US12704288

申请日：2010-02-11

Applicant: Jye Sheng Hong ,  Siew Yong Chui

Inventor： Jye Sheng Hong ,  Siew Yong Chui

IPC: G11B5/596

CPC classification number: G11B5/5526 ,  G11B5/5552

Abstract: The present disclosure includes systems and techniques relating to control of recording devices, such as disk drives. Systems and techniques can include controlling a motor to actuate a head about a surface of a rotating recording medium, switching from a first mode to a second mode to control the motor based on a condition of operation with respect to the rotating recording medium, and synchronizing the switch from the first mode to the second mode based on a state of electric current associated with the motor.

Abstract translation: 本公开包括与记录装置（例如磁盘驱动器）的控制有关的系统和技术。 系统和技术可以包括控制马达以围绕旋转记录介质的表面致动头部，基于相对于旋转记录介质的操作条件从第一模式切换到第二模式以控制马达，以及同步 基于与电动机相关联的电流的状态从第一模式切换到第二模式。

公开(公告)号：US07924526B1

公开(公告)日：2011-04-12

申请号：US12620902

申请日：2009-11-18

Applicant: Siew Yong Chui ,  Edy Susanto ,  Jye Sheng Hong

Inventor： Siew Yong Chui ,  Edy Susanto ,  Jye Sheng Hong

IPC: G11B21/02

CPC classification number: G11B21/12 ,  G11B19/2063

Abstract: A method and apparatus for controlling the parking of a transducer head in a disk drive. A drive current is provided to a motor which controls movement of the head in a direction to move the head to a parking position. The arrival of the head at the parking position is detected. Upon this detection, a drive stop sequence is initiated to stop providing the drive current a short time after the head reaches the parking position. In one embodiment, it is determined whether the head has reached the parking position by monitoring the back emf (bemf) of the motor controlling the head, typically a voice coil motor (VCM). The detection of a sharp decline in the bemf indicates the head has stopped.

Abstract translation: 一种用于控制在磁盘驱动器中驻波的方法和装置。 驱动电流被提供给电动机，该电动机控制磁头沿使磁头移动到停车位置的方向上的运动。 检测到头部到达停车位置。 在该检测时，启动驱动停止序列，以在头部到达停车位置之后的短时间内停止提供驱动电流。 在一个实施例中，通过监视通常是音圈电机（VCM）的头部的电动机的反电动势（bemf）来确定磁头是否已经到达停车位置。 检测到bemf急剧下降表明头部已停止。

公开(公告)号：US07923954B1

公开(公告)日：2011-04-12

申请号：US12572139

申请日：2009-10-01

Applicant: Siew Yong Chui ,  Jye Sheng Hong

Inventor： Siew Yong Chui ,  Jye Sheng Hong

IPC: H02P6/00

CPC classification number: G05B19/416 ,  G05B2219/42237

Abstract: A circuit for controlling a voice-coil motor (VCM) may incorporate a pulse-width modulation driver to drive the VCM, a zero-current detector to determine whether the current across the VCM is zero, and a Back-EMF voltage detector to measure the voltage across the VCM when the current across the VCM is determined to be zero. The circuit may determine the current velocity of the VCM and use this information to control the velocity of the VCM.

Abstract translation: 用于控制音圈电机（VCM）的电路可以包括用于驱动VCM的脉冲宽度调制驱动器，用于确定VCM上的电流是否为零的零电流检测器，以及用于测量 当VCM上的电流被确定为零时，VCM两端的电压被确定为零。 该电路可以确定VCM的当前速度，并使用该信息来控制VCM的速度。

公开(公告)号：US07636220B1

公开(公告)日：2009-12-22

申请号：US11595697

申请日：2006-11-10

Applicant: Siew Yong Chui ,  Edy Susanto ,  Jye Sheng Hong

Inventor： Siew Yong Chui ,  Edy Susanto ,  Jye Sheng Hong

IPC: G11B21/02

CPC classification number: G11B21/12 ,  G11B19/2063

Abstract: A method and apparatus for controlling the parking of a transducer head in a disk drive. A drive current is provided to a motor which controls movement of the head in a direction to move the head to a parking position. The arrival of the head at the parking position is detected. Upon this detection, a drive stop sequence is initiated to stop providing the drive current a short time after the head reaches the parking position. In one embodiment, it is determined whether the head has reached the parking position by monitoring the back emf (bemf) of the motor controlling the head, typically a voice coil motor (VCM). The detection of a sharp decline in the bemf indicates the head has stopped.

Abstract translation: 一种用于控制在磁盘驱动器中驻波的方法和装置。 驱动电流被提供给电动机，该电动机控制磁头沿使磁头移动到停车位置的方向上的运动。 检测到头部到达停车位置。 在该检测时，启动驱动停止序列，以在头部到达停车位置之后的短时间内停止提供驱动电流。 在一个实施例中，通过监视通常是音圈电机（VCM）的头部的电动机的反电动势（bemf）来确定磁头是否已经到达停车位置。 检测到bemf急剧下降表明头部已停止。

公开(公告)号：US07622880B1

公开(公告)日：2009-11-24

申请号：US11871110

申请日：2007-10-11

Applicant: Siew Yong Chui ,  Jye Sheng Hong

Inventor： Siew Yong Chui ,  Jye Sheng Hong

IPC: G05B11/28

CPC classification number: G05B19/416 ,  G05B2219/42237

Abstract: A circuit for controlling a voice-coil motor (VCM) may incorporate a pulse-width modulation driver to drive the VCM, a zero-current detector to determine whether the current across the VCM is zero, and a Back-EMF voltage detector to measure the voltage across the VCM when the current across the VCM is determined to be zero. The circuit may determine the current velocity of the VCM and use this information to control the velocity of the VCM.

Abstract translation: 用于控制音圈电机（VCM）的电路可以包括用于驱动VCM的脉冲宽度调制驱动器，用于确定VCM上的电流是否为零的零电流检测器，以及用于测量 当VCM上的电流被确定为零时，VCM两端的电压被确定为零。 该电路可以确定VCM的当前速度，并使用该信息来控制VCM的速度。

公开(公告)号：US07436618B1

公开(公告)日：2008-10-14

申请号：US11485597

申请日：2006-07-12

Applicant: Sakti Rana ,  Yayue Zhang ,  Siew Yong Chui

Inventor： Sakti Rana ,  Yayue Zhang ,  Siew Yong Chui

IPC: G11B21/02 ,  H02J7/00 ,  H01G2/12

CPC classification number: H02M3/07 ,  G11B21/12 ,  H02M1/36

Abstract: A protection circuit for a capacitor comprises a voltage pump that selectively charges the capacitor. A current source selectively charges the capacitor. A controller compares a charging voltage to a threshold charging voltage and selects at least one of the voltage pump and the current source based on the comparison.

Abstract translation: 用于电容器的保护电路包括选择性地对电容器充电的电压泵。 电流源选择性地对电容器充电。 控制器将充电电压与阈值充电电压进行比较，并且基于该比较选择电压泵和电流源中的至少一个。

公开(公告)号：US07385364B1

公开(公告)日：2008-06-10

申请号：US11806394

申请日：2007-05-31

Applicant: Kuong Hoo, legal representative ,  Foo Leng Leong ,  Siew Yong Chui ,  Cheng Yong Teoh

Inventor： Sakti Pada Rana

IPC: H02P3/08 ,  G11B11/01

CPC classification number: H02P6/182

Abstract: A system and method for determining the rotational speed of a motor, such as a three-phase disk drive motor, detects back electromotive force voltage generated during operation of the motor with an automatic pole calibration to minimize or eliminating variations in the wave of a freeze signal. A phase voltage at a winding is compared against a center tap (CT) voltage. Once the phase voltage falls to a specified voltage level, a detect signal is generated. A predetermined time after the detect signal is generated, a freeze signal is generated for freezing at least the circuit associated with the winding.

Abstract translation: 用于确定诸如三相盘驱动电动机之类的电动机的转速的系统和方法用自动极校准来检测在电动机操作期间产生的反电动势电压，以最小化或消除冻结波中的变化 信号。 将绕组的相电压与中心抽头（CT）电压进行比较。 一旦相电压下降到指定的电压电平，就产生检测信号。 产生检测信号之后的预定时间，产生冻结信号，至少冻结与绕组相关的电路。