专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

11. 发明申请

US20060083037A1 Digital PWM controller with efficiency optimization as a function of PWM duty cycle 审中-公开
标题翻译：数字PWM控制器，其效率优化作为PWM占空比的函数
公开(公告)号：US20060083037A1
公开(公告)日：2006-04-20
申请号：US11291648
申请日：2005-12-01
申请人： Ka Leung , Chia Wei , Kafai Leung , Ross Fosler
发明人： Ka Leung , Chia Wei , Kafai Leung , Ross Fosler
IPC分类号： H02M3/24
CPC分类号： H02M3/33576
摘要： A method for optimizing the efficiency of a digital power supply having at least one switch for connecting an input voltage to an input node for driving an inductive storage element connected to an out put node tp provide a regulated output voltage, and a second switch for shunting the intermediate node to ground in a complementary operation. Complementary switch control signals are generated for controlling the operation of the first and second switches, wherein the ratio of the on and off time of the first switch determines the ratio of the output voltage to the input voltage. The duty cycle is then controlled to provide a regulated voltage on the output node. A delay circuit provides a delay between the time the first switch is turned off and the second switch is turned on. For a given load, the delay is varied and then a minima for the delay is determined to provide the minimum duty cycle for the given load.
摘要翻译：一种用于优化数字电源的效率的方法，其具有用于将输入电压连接到输入节点的至少一个开关，用于驱动连接到输出节点tp的感应存储元件，提供稳定的输出电压，以及用于分流的第二开关中间节点在互补操作中进行接地。产生用于控制第一和第二开关的操作的互补开关控制信号，其中第一开关的导通和关断时间的比确定输出电压与输入电压的比率。然后控制占空比以在输出节点上提供调节电压。延迟电路在第一开关断开的时间和第二开关导通之间提供延迟。对于给定的负载，延迟变化，然后确定延迟的最小值以提供给定负载的最小占空比。

12. 发明申请

US20060023479A1 PID based controller for DC-DC converter with post-processing filters 失效
标题翻译：基于PID的控制器，用于具有后处理滤波器的DC-DC转换器
公开(公告)号：US20060023479A1
公开(公告)日：2006-02-02
申请号：US11096598
申请日：2005-03-31
申请人： Ka Leung , Kafai Leung , Jinwen Xiao
发明人： Ka Leung , Kafai Leung , Jinwen Xiao
IPC分类号： H02M3/24
CPC分类号： H02M3/3376 , H02M3/33561 , H02M3/33592 , H02M2001/0012 , Y02B70/1475
摘要： A digital PID controller for controlling the operation of a switching power converter is disclosed. A data converter is provided for converting the analog sense voltage to a digital sense voltage. A difference circuit then determines the difference between the digital sense voltage and a reference voltage as a digital error voltage, which reference voltage represents a desired output DC voltage for the power converter. A digital compensator processes the digital error voltage. The digital compensator includes a PID compensation network for compensating the digital error signal with a discrete time PID control law and a postprocessing filter for processing the output of the PID compensation network, comprised of a sinc filter with variable parameters to define the operating characteristics thereof, such that a first notch associated therewith can be placed at a desired frequency. A switching control signal generator generates switching control signals for controlling the operation of the power converter, wherein the digital compensator and the switching control signal generator operate to minimize the digital error signal. A controller for controls the operation the digital compensator to define the operating characteristics of the sinc filter.
摘要翻译：公开了一种用于控制开关电源转换器的操作的数字PID控制器。提供了一种数据转换器，用于将模拟检测电压转换为数字检测电压。然后，差分电路将数字感测电压和参考电压之间的差作为数字误差电压确定，该参考电压表示功率转换器的期望的输出直流电压。数字补偿器处理数字误差电压。数字补偿器包括用于利用离散时间PID控制定律补偿数字误差信号的PID补偿网络和用于处理PID补偿网络的输出的后处理滤波器，其包括具有可变参数的sinc滤波器以限定其操作特性，使得与其相关联的第一切口可以以期望的频率放置。开关控制信号发生器产生用于控制功率转换器的操作的开关控制信号，其中数字补偿器和开关控制信号发生器操作以最小化数字误差信号。控制器，用于控制数字补偿器的操作，以定义正弦滤波器的工作特性。

13. 发明申请

US20060022732A1 DPWM with leading edge blanker circuit 有权
标题翻译： DPWM具有前沿消隐电路
公开(公告)号：US20060022732A1
公开(公告)日：2006-02-02
申请号：US11096187
申请日：2005-03-31
申请人： Kafai Leung , Ka Leung , Jinwen Xiao
发明人： Kafai Leung , Ka Leung , Jinwen Xiao
IPC分类号： H03K3/017
CPC分类号： H03M1/0863 , G06F1/025 , H03M1/822
摘要： An apparatus for providing over current protection for a digital pulse width modulator is disclosed. The apparatus includes first logic circuitry for generating a primary interrupt indicating that a detected output current is greater than a threshold current. Second logic circuitry blanks out current spikes in the output current occurring on a leading pulse edge of at least one of a plurality of outputs of the digital pulse-width modulator.
摘要翻译：公开了一种用于为数字脉宽调制器提供过流保护的装置。该装置包括用于产生指示检测到的输出电流大于阈值电流的主中断的第一逻辑电路。第二逻辑电路消除在数字脉冲宽度调制器的多个输出中的至少一个的前导脉冲沿出现的输出电流中的电流尖峰。

14. 发明申请

US20050280458A1 Low power PLL for PWM switching digital control power supply 有权
标题翻译：低功耗PLL用于PWM开关数字控制电源
公开(公告)号：US20050280458A1
公开(公告)日：2005-12-22
申请号：US10872702
申请日：2004-06-21
申请人： Ka Leung , Kafai Leung
发明人： Ka Leung , Kafai Leung
IPC分类号： H02M3/335 , H03K3/017 , H03K5/00 , H03K5/13 , H03K7/08 , H03L7/099
CPC分类号： H02M3/33576 , H03K5/133 , H03K7/08 , H03K2005/00032 , H03K2005/00156 , H03K2005/00202 , H03L7/0805 , H03L7/0996
摘要： A timing source for a pulse generator is disclosed, which timing source includes an input for receiving a reference clock output at a reference operating frequency. An edge generator is provided for generating a plurality of clock edges from an edge of the reference clock during one period thereof, with the spacing of the plurality of clock edges being a multiple of a predetermined divisor. As such, the resolution of such spacing emulates a higher clock frequency than the reference operating frequency. A selector then selects one of the plurality of clock edges from a reference one thereof to define the width of a pulse.
摘要翻译：公开了用于脉冲发生器的定时源，该定时源包括用于以参考工作频率接收参考时钟输出的输入。边缘发生器被提供用于在其一个周期期间从参考时钟的边缘产生多个时钟边缘，多个时钟边沿的间隔是预定除数的倍数。因此，这种间隔的分辨率模拟比参考工作频率更高的时钟频率。然后，选择器从其参考一个中选择多个时钟边沿中的一个来定义脉冲的宽度。

15. 发明申请

US20060033647A1 Digital power supply with programmable soft start 有权
标题翻译：数字电源，可编程软启动
公开(公告)号：US20060033647A1
公开(公告)日：2006-02-16
申请号：US11172484
申请日：2005-06-30
申请人： Ka Leung , Chia-Ling Wei
发明人： Ka Leung , Chia-Ling Wei
IPC分类号： H03M7/00
CPC分类号： H02M1/36 , H02M3/157 , Y10S323/901
摘要： A system for controlling a soft start for a switching power converter includes a digital controller that enables the programming of a plurality of input voltage profiles during a soft start condition of the switching power converter. The programming of the plurality of input voltage profiles is parameterized by a control parameter. A microcontroller determines the control parameter used by said digital controller and operates independently of the operation of the digital controller.
摘要翻译：用于控制开关电源转换器的软启动的系统包括数字控制器，其能够在开关功率转换器的软启动条件期间对多个输入电压分布进行编程。通过控制参数对多个输入电压分布的编程进行参数化。微控制器确定由所述数字控制器使用的控制参数，并独立于数字控制器的操作进行操作。

16. 发明授权

US06985101B2 High speed comparator with blocking switches for SAR convertor 失效
标题翻译：具有SAR转换器阻塞开关的高速比较器
公开(公告)号：US06985101B2
公开(公告)日：2006-01-10
申请号：US10735164
申请日：2003-12-12
申请人： Ka Leung , Doug Piasecki
发明人： Ka Leung , Doug Piasecki
IPC分类号： H03M1/12 , H03M1/34
CPC分类号： H03M1/1057 , H03M1/468
摘要： Open loop common mode driver for switched capacitor input to SAR. A method for controlling the operation of a SAR conversion cycle. The method includes the steps of first initiating the SAR conversion cycle by connecting one side of a plurality of capacitors in a capacitor array to a first capacitor reference voltage and the other side of the plurality of capacitors to the input of a comparator. This is followed by the step of sequentially switching in a plurality of compare cycles the one side of a select one or ones of the capacitors to a second capacitor reference voltage to change the voltage on the input of the comparator. Then, a compare operation is initiated after initiation of each compare cycle to compare the value on the input of the comparator with a compare reference voltage after a predetermined settling time has elapsed from the beginning of the initiation of each compare cycle. During the compare cycle, transients due to voltage variations on the input of the comparator are reduced as a result of the step of sequentially switching, the reduction operating for a predetermined portion of the associated compare cycle.
摘要翻译：用于开关电容输入到SAR的开环共模驱动器。一种控制SAR转换周期运行的方法。该方法包括以下步骤：首先通过将电容器阵列中的多个电容器的一侧连接到第一电容器参考电压并且将多个电容器的另一侧连接到比较器的输入来启动SAR转换周期。接下来是将多个比较周期中的一个或多个电容器依次切换到第二电容器参考电压以改变比较器输入端的电压的步骤。然后，在每个比较周期开始之后开始比较操作，以便在从每个比较周期的开始开始经过预定的建立时间之后将比较器的输入上的值与比较参考电压进行比较。在比较周期期间，由于顺序切换的步骤，相关联的比较周期的预定部分的减小操作，由于比较器输入端的电压变化导致的瞬变减小。

17. 发明申请

US20070168681A1 MCU with low power mode of operation 有权
标题翻译： MCU具有低功耗工作模式
公开(公告)号：US20070168681A1
公开(公告)日：2007-07-19
申请号：US11301579
申请日：2005-12-13
申请人： Ka Leung
发明人： Ka Leung
IPC分类号： G06F1/00
CPC分类号： H02M1/36 , G06F1/3203 , G06F1/324 , G06F1/3296 , H02M3/156 , H03K3/3545 , Y02D10/126 , Y02D10/172
摘要： A low power system is disclosed for working in conjunction with a digital circuit that is disposed between positive and negative terminals. The system includes an internal voltage generator for increasing, for at least a first portion of the digital circuit, a voltage difference between the at least a first portion of the digital circuit and the voltage on at least one of the positive and negative terminals during a low power mode of operation. This allows the voltage across the at least first portion of the digital circuit to be less than the full voltage across the positive and negative terminals.
摘要翻译：公开了一种与设置在正极和负极之间的数字电路一起工作的低功率系统。该系统包括内部电压发生器，用于在数字电路的至少第一部分期间增加数字电路的至少第一部分与正端子和负极端子中的至少一个上的电压之间的电压差低功耗运行模式。这允许跨越数字电路的至少第一部分的电压小于正极和负极两端的全部电压。

18. 发明申请

US20070132436A1 MCU WITH ON-CHIP BOOST CONVERTER CONTROLLER 失效
标题翻译：具有片上升压转换器控制器的MCU
公开(公告)号：US20070132436A1
公开(公告)日：2007-06-14
申请号：US11618433
申请日：2006-12-29
申请人： Alan Westwick , Ka Leung
发明人： Alan Westwick , Ka Leung
IPC分类号： G05F1/253
CPC分类号： H02M3/156
摘要： An integrated system on a chip includes processing circuitry that performs predefined digital processing functions on the chip. The processing circuitry operates responsive to a regulated voltage. An on-chip boost converter generates the regulated voltage responsive to an off-chip voltage provided by an off chip voltage source. The regulated voltage source has a voltage level greater than the off-chip voltage.
摘要翻译：芯片上集成的系统包括在芯片上执行预定义的数字处理功能的处理电路。处理电路响应于调节电压而工作。片上升压转换器响应于由片外电压源提供的片外电压产生调节电压。调节电压源具有大于片外电压的电压电平。

19. 发明申请

US20070036212A1 Digital Controller Based Power Factor Correction Circuit 失效
标题翻译：基于数字控制器的功率因数校正电路
公开(公告)号：US20070036212A1
公开(公告)日：2007-02-15
申请号：US11382009
申请日：2006-05-05
申请人： Ka Leung , Donald Alfano , Ross Fosler
发明人： Ka Leung , Donald Alfano , Ross Fosler
IPC分类号： H03B1/00
CPC分类号： H02M3/157 , H02M1/42 , H03K17/0822 , Y02B70/12
摘要： A power factor correction circuit utilizes a digital controller string comprised of an analog-to-digital converter, which is input to a digital compensator followed by a pulse width modulation circuit for generating a switching pulse. The loop current in a regulator circuit such as a boost regulator is sensed and input to one side of a differential analog-to-digital converter, the other side thereof providing a digital reference current. This digital reference current is derived from comparing the input AC voltage to the regulator with the DC output voltage and processing these two voltages with a PFC algorithm to provide this reference voltage.
摘要翻译：功率因数校正电路利用由模数转换器组成的数字控制器串，其输入到数字补偿器，随后是用于产生开关脉冲的脉宽调制电路。调节器电路（例如升压调节器）中的回路电流被感测并输入到差分模数转换器的一侧，其另一侧提供数字参考电流。该数字参考电流是通过将输入AC电压与调节器与直流输出电压进行比较而得到的，并使用PFC算法处理这两个电压以提供该参考电压。

20. 发明申请

US20060009150A1 Method and system for providing a context for message compression 有权
公开(公告)号：US20060009150A1
公开(公告)日：2006-01-12
申请号：US11225263
申请日：2005-09-12
申请人： Ka Leung , Khiem Le , Zhigang Liu , Christopher Clanton
发明人： Ka Leung , Khiem Le , Zhigang Liu , Christopher Clanton
IPC分类号： H04H1/00
CPC分类号： H04L69/04 , H03M7/3088 , H04L51/066
摘要： A method for providing wireless communication between a mobile station and a network station using a context for message compression is provided. Profile-specific information is stored persistently in a profile-specific dictionary. Communication is then provided between the mobile station and the network station using the profile-specific dictionary for message compression.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式