公开(公告)号：US07602131B1

公开(公告)日：2009-10-13

申请号：US12327860

申请日：2008-12-04

Applicant: Siew Yong Chui

Inventor： Siew Yong Chui

IPC: H02P7/00 ,  H02P3/08

CPC classification number: H02P6/182 ,  G11B5/5526 ,  H02P25/034

Abstract: A system includes a current control module that supplies current to a voice coil motor during a first period to rotate an actuator arm in a first rotational direction, that discharges the current from the voice coil motor after the first period, and that generates a control signal a predetermined period after the current is discharged. A back electromagnetic force (bemf) module generates a bemf signal in response to the control signal. A speed control module determines a speed of the actuator arm based on the bemf signal.

Abstract translation: 一种系统包括电流控制模块，该电流控制模块在第一时段期间向音圈电机提供电流，以沿第一旋转方向旋转致动器臂，其在第一周期之后从音圈电机排出电流，并且产生控制信号 电流放电后的预定时间。 反电磁力（bemf）模块响应于控制信号产生一个bemf信号。 速度控制模块基于bemf信号确定致动器臂的速度。

公开(公告)号：US07466095B1

公开(公告)日：2008-12-16

申请号：US11455476

申请日：2006-06-19

Applicant: Siew Yong Chui

Inventor： Siew Yong Chui

IPC: H02P3/08 ,  H02P7/00

CPC classification number: H02P6/182 ,  G11B5/5526 ,  H02P25/034

Abstract: A system and method for controlling an actuator includes a control module that communicates with a plurality of switching devices to generate current through a voice coil motor during a first time period so that an actuator arm rotates in a first rotational direction in response to the current. The control module controls the switching devices to discharge the current from the voice coil motor during a second time period less than the first time period so that the first rotational direction of the actuator arm is maintained after discharging the current. The control module further includes a back electromagnetic force (bemf) module for determining a bemf voltage after controlling the switching devices to discharge the current, and an actuator arm speed control module for determining an actuator arm speed in response to the bemf voltage.

Abstract translation: 用于控制致动器的系统和方法包括控制模块，其与多个开关装置通信，以在第一时间段内产生通过音圈电机的电流，使得致动器臂响应于电流在第一旋转方向上旋转。 所述控制模块控制所述开关装置在小于所述第一时间段的第二时间段期间从所述音圈电动机放电电流，使得在放电后维持所述致动器臂的所述第一旋转方向。 控制模块还包括用于在控制开关装置以释放电流之后确定电压的反电磁力（bemf）模块，以及用于响应于电压而确定致动器臂速度的致动器臂速度控制模块。

公开(公告)号：US08981484B2

公开(公告)日：2015-03-17

申请号：US13467666

申请日：2012-05-09

Applicant: Sehat Sutardja ,  Ravishanker Krishnamoorthy ,  Siew Yong Chui

Inventor： Sehat Sutardja ,  Ravishanker Krishnamoorthy ,  Siew Yong Chui

IPC: H01L23/62 ,  H01L29/78 ,  H01L29/66 ,  H01L29/08

CPC classification number: H01L27/0266 ,  H01L27/0288 ,  H01L29/0847 ,  H01L29/0878 ,  H01L29/66659 ,  H01L29/66681 ,  H01L29/7817 ,  H01L29/7835 ,  H01L2924/0002 ,  H01L2924/00

Abstract: An integrated circuit (IC) including a well region of the IC having a first doping level and a plurality of semiconductor regions implanted in the well region. Each of the plurality of semiconductor regions has a second doping level. The second doping level is greater than the first doping level. A plurality of polysilicon regions are arranged on the plurality of semiconductor regions. The polysilicon regions are respectively connected to the semiconductor regions. The plurality of semiconductor regions is a drain of a metal-oxide semiconductor field-effect transistor (MOSFET).

Abstract translation: 一种集成电路（IC），包括具有第一掺杂级的IC的阱区和植入阱区的多个半导体区。 多个半导体区域中的每一个具有第二掺杂水平。 第二掺杂水平大于第一掺杂水平。 多个多晶硅区域布置在多个半导体区域上。 多晶硅区域分别连接到半导体区域。 多个半导体区域是金属氧化物半导体场效应晶体管（MOSFET）的漏极。

公开(公告)号：US08791738B2

公开(公告)日：2014-07-29

申请号：US13557265

申请日：2012-07-25

Applicant: Siew Yong Chui ,  Jun Li

Inventor： Siew Yong Chui ,  Jun Li

IPC: H03K3/02

CPC classification number: H02M1/36 ,  H02H7/222 ,  H03K17/0822 ,  H03K2017/6875

Abstract: Aspects of the disclosure provide a circuit. The circuit includes a depletion mode transistor coupled to a power supply and a current path coupled with the depletion mode transistor in series to provide a current to charge a capacitor. The current path has a first resistance during a first stage, such as when the circuit initially receives power, and has a second resistance during a second stage when the capacitor is charged to have a predetermined voltage level.

Abstract translation: 本公开的方面提供电路。 电路包括耦合到电源的耗尽型晶体管和与耗尽型晶体管串联连接的电流通路，以提供电流来对电容器充电。 电流路径在第一级期间具有第一电阻，例如当电路最初接收电力时，并且当电容器被充电以具有预定电压电平时，在第二级期间具有第二电阻。

公开(公告)号：US20130043726A1

公开(公告)日：2013-02-21

申请号：US13557765

申请日：2012-07-25

Applicant: Ravishanker KRISHNAMOORTHY ,  Siew Yong Chui ,  Jun Li

Inventor： Ravishanker KRISHNAMOORTHY ,  Siew Yong Chui ,  Jun Li

IPC: H02J3/00

CPC classification number: H05B33/0845 ,  H05B37/0272 ,  H05B39/08 ,  H05B41/392 ,  Y10T307/406

Abstract: Aspects of the disclosure provide a circuit. The circuit includes a control circuit and a return path circuit. The control circuit is configured to operate in response to a first conduction angle of a dimmer coupled to the circuit. The first conduction angle is adjusted to control an output power to a first device. The dimmer has a second conduction angle that is independent of the control of the output power to the first device. The return path circuit is configured to provide a return path to enable providing power to a second device in response to the second conduction angle.

Abstract translation: 本公开的方面提供电路。 电路包括控制电路和返回路径电路。 控制电路被配置为响应于耦合到电路的调光器的第一导通角而工作。 调整第一导通角以控制第一装置的输出功率。 调光器具有与控制第一器件的输出功率无关的第二导通角。 返回路径电路被配置为提供返回路径以使得能够响应于第二导通角度向第二设备提供电力。

公开(公告)号：US20120326234A1

公开(公告)日：2012-12-27

申请号：US13467666

申请日：2012-05-09

Applicant: Sehat Sutardja ,  Ravishanker Krishnamoorthy ,  Siew Yong Chui

Inventor： Sehat Sutardja ,  Ravishanker Krishnamoorthy ,  Siew Yong Chui

IPC: H01L27/06 ,  H01L21/02

CPC classification number: H01L27/0266 ,  H01L27/0288 ,  H01L29/0847 ,  H01L29/0878 ,  H01L29/66659 ,  H01L29/66681 ,  H01L29/7817 ,  H01L29/7835 ,  H01L2924/0002 ,  H01L2924/00

Abstract: An integrated circuit (IC) including a well region of the IC having a first doping level and a plurality of semiconductor regions implanted in the well region. Each of the plurality of semiconductor regions has a second doping level. The second doping level is greater than the first doping level. A plurality of polysilicon regions are arranged on the plurality of semiconductor regions. The polysilicon regions are respectively connected to the semiconductor regions. The plurality of semiconductor regions is a drain of a metal-oxide semiconductor field-effect transistor (MOSFET).

Abstract translation: 一种集成电路（IC），包括具有第一掺杂级的IC的阱区和植入阱区的多个半导体区。 多个半导体区域中的每一个具有第二掺杂水平。 第二掺杂水平大于第一掺杂水平。 多个多晶硅区域布置在多个半导体区域上。 多晶硅区域分别连接到半导体区域。 多个半导体区域是金属氧化物半导体场效应晶体管（MOSFET）的漏极。

公开(公告)号：US07852028B1

公开(公告)日：2010-12-14

申请号：US12131730

申请日：2008-06-02

Applicant: Jye Sheng Hong ,  Siew Yong Chui

Inventor： Jye Sheng Hong ,  Siew Yong Chui

IPC: H02P7/00 ,  H02P7/29 ,  G05B11/28

CPC classification number: H02P25/034

Abstract: Analog control of the pulse width used to control the speed of a voice coil motor may be implemented using a “constant-current-charging-capacitor” configuration where the time needed to charge the capacitor is directly related to how far the actual motor speed is from the target speed. The BEMF voltage, indicative of motor speed, is sampled, and then stored in a storage capacitor, which is allowed to charge/discharge to a target voltage level. The time required to charge/discharge the capacitor to the target voltage is directly proportional to the difference between the BEMF voltage and the target voltage, and may be used directly as the pulse width (i.e., the charging time) in the PWM velocity control system. To avoid larger capacitors, a pulse multiplier circuit can be added, allowing charging/discharging the sampled voltage to the target voltage to be repeated by a number, N, of times.

Abstract translation: 可以使用“恒流充电电容器”配置来实现用于控制音圈电机的速度的脉冲宽度的模拟控制，其中对电容器充电所需的时间与实际电动机速度几何直接相关 从目标速度。 表示电机速度的BEMF电压被采样，然后存储在允许充电/放电到目标电压电平的存储电容器中。 将电容器充电/放电到目标电压所需的时间与BEMF电压和目标电压之间的差异成正比，可以直接用作PWM速度控制系统中的脉冲宽度（即充电时间） 。 为了避免较大的电容器，可以添加脉冲倍增器电路，从而使得采样电压对目标电压进行充电/放电以重复N次。

公开(公告)号：US07848045B1

公开(公告)日：2010-12-07

申请号：US11511841

申请日：2006-08-28

Applicant: Ying Tian Li ,  Siew Yong Chui ,  Cheng Yong Teoh

Inventor： Ying Tian Li ,  Siew Yong Chui ,  Cheng Yong Teoh

IPC: G11B21/02 ,  G11B15/18

CPC classification number: G11B19/02 ,  G06F1/32

Abstract: The power required by a voice coil motor (VCM) to maintain the head in the data region of a disk drive during an idle mode is further reduced. The current supplied to the VCM is switched on and off. This takes advantage of the inherent inductance in the VCM, which maintains a current after the current supply is switched off. The current will slowly decay, with it being switched on again before it reaches a level where the average value won't offset the flex bias. In one embodiment, the current is maintained in a single direction, to offset the flex bias which pushes in one direction. Digital switches are used to reduce the power consumption of the control circuitry.

Abstract translation: 音圈电机（VCM）在空闲模式期间将磁头保持在磁盘驱动器的数据区域所需的功率进一步降低。 提供给VCM的电流打开和关闭。 这充分利用了VCM中的固有电感，该电感在电流供应关闭后保持电流。 电流将慢慢衰减，在其达到平均值不会抵消挠曲偏差的水平之前再次接通。 在一个实施例中，电流保持在单个方向上，以抵消在一个方向上推动的柔性偏压。 数字开关用于降低控制电路的功耗。

公开(公告)号：US07362063B1

公开(公告)日：2008-04-22

申请号：US11677961

申请日：2007-02-22

Applicant: Siew Yong Chui ,  Foo Leng Leong

Inventor： Siew Yong Chui ,  Foo Leng Leong

IPC: H02K23/00

CPC classification number: H02P6/182 ,  G11B19/28 ,  H02P2209/07

Abstract: In a method for measuring motor speed and position by detecting the back-EMF generated during pole-pair interactions, fluctuations of a three-phase motor power supply that may affect back-EMF detection are reduced. One phase of the power supply is tristated for a certain interval preceding and during back-EMF detection. For a shorter interval during back-EMF detection, the voltage drop across the motor is reduced from the full power supply voltage. This preferably is accomplished either by pulling a first of the other two power supply phases low, while pulling a second of the other two power supply phases up to a regulated voltage below the power supply voltage, or by pulling the second of the other two phases up to the power supply voltage and pulling the first of the other two phases down to a regulated voltage above ground.

Abstract translation: 在通过检测在极对相互作用期间产生的反电动势来测量电动机速度和位置的方法中，减小了可能影响反电动势检测的三相电动机电源的波动。 电源的一个阶段在反电动势检测之前和期间都保持一定的间隔。 对于反电动势检测期间较短的间隔，电机两端的电压降从全电源电压降低。 这优选地通过将另外两个电源相位中的第一相位拉低，同时将另外两个电源相位中的第二个拉至低于电源电压的调节电压，或者通过拉动另外两个相位中的第二相 直到电源电压并将另外两个相位的第一个相位降低到地面以上的稳压电压。

公开(公告)号：US07208974B1

公开(公告)日：2007-04-24

申请号：US11142176

申请日：2005-05-31

Applicant: Siew Yong Chui

Inventor： Siew Yong Chui

IPC: H03K19/003 ,  H03K17/16

CPC classification number: H03K19/01721 ,  H03F1/301 ,  H03F3/347 ,  H03F3/505 ,  H03F2200/24 ,  H03F2203/5027 ,  H03K19/018521

Abstract: Circuits and methods are provided for producing a rail-to-rail output voltage. A circuit includes a level shifter, a source follower, and a current compensation circuit. The level shifter receives an input signal and applies a compensation voltage to the input signal relative to a voltage level of the input signal in steady-state. The source follower produces an output signal and, responsive to variations in the voltage level of the input signal, changes the voltage level of the output signal using a biasing current. The current compensation circuit, responsive to a difference between the voltage levels of the input and output signals, varies an amount of the biasing current.

Abstract translation: 电路和方法用于产生轨到轨输出电压。 电路包括电平移位器，源极跟随器和电流补偿电路。 电平移位器接收输入信号，并相对于输入信号在稳态的电压电平向输入信号施加补偿电压。 源极跟随器产生输出信号，并且响应于输入信号的电压电平的变化，使用偏置电流来改变输出信号的电压电平。 电流补偿电路响应于输入和输出信号的电压电平之差，改变偏置电流的量。