公开(公告)号：US07116512B1

公开(公告)日：2006-10-03

申请号：US11254944

申请日：2005-10-20

Applicant: Sakti Rana ,  Yayue Zhang ,  Siew Yong Chui

Inventor： Sakti Rana ,  Yayue Zhang ,  Siew Yong Chui

IPC: G11B21/02 ,  H02J7/04

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 selectively activates the current source while deactivating the voltage pump when a charging voltage is less than a threshold charging voltage level and selectively deactivates the current source while activating the voltage pump when the charging voltage is greater than the threshold charging voltage level.

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。 当充电电压小于阈值充电电压电平时，控制器选择性地激活电流源，同时在充电电压大于阈值充电电压电平的同时激活电压泵时选择性地去激活电流源。

公开(公告)号：US08593096B1

公开(公告)日：2013-11-26

申请号：US13607974

申请日：2012-09-10

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：US08358117B1

公开(公告)日：2013-01-22

申请号：US12779743

申请日：2010-05-13

Applicant: Siew Yong Chui ,  Rudy Kurniawan ,  Jye Sheng Hong

Inventor： Siew Yong Chui ,  Rudy Kurniawan ,  Jye Sheng Hong

IPC: G05F1/00

CPC classification number: H02M3/1563

Abstract: In one embodiment, an apparatus includes output voltage comparison circuitry that compares an output voltage of a regulator and a reference voltage and outputs an output voltage comparison signal based on the comparison. Slope detection circuitry detects a slope of the output voltage and outputs a slope comparison signal based on the slope detected. Duty cycle determination circuitry receives the output comparison signal and the slope comparison signal and outputs a pre-driver signal having a duty cycle based on the output comparison signal and the slope comparison signal. The pre-driver signal is used to regulate the output voltage of the voltage regulator.

Abstract translation: 在一个实施例中，一种装置包括输出电压比较电路，其比较调节器的输出电压和参考电压，并输出基于该比较的输出电压比较信号。 斜率检测电路检测输出电压的斜率，并根据检测到的斜率输出斜率比较信号。 占空比确定电路接收输出电压比较信号和斜率比较信号，并输出具有基于输出电压比较信号和斜率比较信号的占空比的预驱动器信号。 预驱动器信号用于调节稳压器的输出电压。

公开(公告)号：US20120313692A1

公开(公告)日：2012-12-13

申请号：US13467648

申请日：2012-05-09

Applicant: Sehat Sutardja ,  Ravishanker Krishnamoorthy ,  Siew Yong Chui

Inventor： Sehat Sutardja ,  Ravishanker Krishnamoorthy ,  Siew Yong Chui

IPC: G05F3/02

CPC classification number: H01L28/20 ,  H01L27/0676 ,  H01L27/0794

Abstract: An integrated circuit (IC) including a first layer of a conducting material; a second layer of an insulating material, where the second layer has a first side arranged adjacent to the first layer, and a second side; and a substrate arranged adjacent to the second side of the second layer. A first well arranged in the substrate. The first well is adjacent to the second side of the second layer. The substrate and the first well have opposite doping.

Abstract translation: 一种包括导电材料的第一层的集成电路（IC） 绝缘材料的第二层，其中所述第二层具有邻近所述第一层设置的第一侧和第二侧; 以及布置成与第二层的第二侧相邻的衬底。 布置在基板中的第一阱。 第一井与第二层的第二侧相邻。 衬底和第一阱具有相反的掺杂。

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：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。