公开(公告)号：US07755342B2

公开(公告)日：2010-07-13

申请号：US11743468

申请日：2007-05-02

申请人： Rengang Chen ,  James Steven Brown

发明人： Rengang Chen ,  James Steven Brown

IPC分类号： G05F1/56

CPC分类号： H02M3/156 ,  H02M2001/0032 ,  Y02B70/16

摘要： A circuit for transitioning between a discontinuous and a fixed frequency continuous conduction mode (DCM) and (CCM) of a power converter having a driver receiving PWM signals and controlling a switching stage comprises a control switch and a sync switch connected at a common switching node for driving a load. The circuit including a PWM modulator for providing PWM signals; and a mode selector for receiving a duty cycle value, a preset switching period, and a duty cycle at a critical conduction point having a switching frequency equal to the preset switching period and providing an on-time of the control switch and a switching period to the PWM modulator, wherein if the duty cycle value is greater than the duty cycle at a critical conduction point, the PWM modulator will drive will provide the PWM signals to operate the switching stage in the CCM with constant-frequency duty cycle control, and if the duty cycle value is less than duty cycle at a critical conduction point, the PWM modulator will drive will provide the PWM signals to operate the switching stage in the DCM by turning off the sync switch when a load current becomes negative.

摘要翻译： 用于在具有接收PWM信号并控制切换级的驱动器的功率转换器的不连续和固定频率连续传导模式（DCM）和（CCM）之间转换的电路包括控制开关和在公共交换节点处连接的同步开关 用于驱动负载。 该电路包括用于提供PWM信号的PWM调制器; 以及模式选择器，用于在具有等于预设开关周期的开关频率的临界导通点处接收占空比值，预设开关周期和占空比，并且提供控制开关的导通时间和开关周期 PWM调制器，其中如果占空比值大于临界导通点的占空比，则PWM调制器将驱动将提供PWM信号以恒定频率占空比控制在CCM中操作开关级，并且如果 占空比值小于临界导通点的占空比，当负载电流变为负时，PWM调制器驱动将通过关闭同步开关来提供PWM信号来操作DCM中的开关级。

公开(公告)号：US20070236201A1

公开(公告)日：2007-10-11

申请号：US11695859

申请日：2007-04-03

申请人： James Steven Brown

发明人： James Steven Brown

IPC分类号： G05F1/00

CPC分类号： H02M3/158

摘要： A correction circuit for use in a switched power supply wherein the correction circuit provides a correction signal indicating a duty cycle adjustment necessary to modify pulse width modulation of the power supply such that the output inductor current matches the load current drawn by a load connected to the power supply. The correction circuit may be used in conjunction with feed forward and/or feed back control circuits. The correction circuit may be implemented using either digital or analog circuit components.

摘要翻译： 一种用于开关电源的校正电路，其中所述校正电路提供指示修改所述电源的脉冲宽度调制所需的占空比调整的校正信号，使得所述输出电感器电流与连接到所述电源的负载 电源。 校正电路可以与前馈和/或反馈控制电路结合使用。 校正电路可以使用数字或模拟电路部件来实现。

公开(公告)号：US20110211380A1

公开(公告)日：2011-09-01

申请号：US13034975

申请日：2011-02-25

申请人： James Steven Brown

发明人： James Steven Brown

IPC分类号： H02M7/537

CPC分类号： H02M3/33561 ,  H02J5/005 ,  H02J50/12 ,  H02M3/33569

摘要： A three-quarter bridge power converter includes a first switch configured to selectively couple a switch node to a higher voltage. The power converter also includes a second switch configured to selectively couple the switch node to a lower voltage. The power converter further includes a third switch configured to selectively cause a third voltage to be provided to the switch node when the first and second switches are not coupling the switch node to the higher and lower voltages. The third switch may be configured to selectively couple the switch node to an energy storage or energy source, such as a capacitor. The third switch may also be configured to selectively couple an energy storage or energy source to ground, where the energy storage or energy source is coupled to the switch node.

摘要翻译： 三分之三桥接电力转换器包括被配置为选择性地将开关节点耦合到较高电压的第一开关。 功率转换器还包括被配置为选择性地将开关节点耦合到较低电压的第二开关。 功率转换器还包括第三开关，其被配置为当第一和第二开关未将开关节点耦合到较高和较低的电压时，选择性地将第三电压提供给开关节点。 第三开关可以被配置为选择性地将开关节点耦合到诸如电容器的能量存储或能量源。 第三开关还可以被配置为选择性地将能量存储或能量源耦合到地，其中能量存储或能量源耦合到开关节点。

公开(公告)号：US07816900B2

公开(公告)日：2010-10-19

申请号：US11695859

申请日：2007-04-03

申请人： James Steven Brown

发明人： James Steven Brown

IPC分类号： G05F1/40

CPC分类号： H02M3/158

摘要： A correction circuit for use in a switched power supply wherein the correction circuit provides a correction signal indicating a duty cycle adjustment necessary to modify pulse width modulation of the power supply such that the output inductor current matches the load current drawn by a load connected to the power supply. The correction circuit may be used in conjunction with feed forward and/or feed back control circuits. The correction circuit may be implemented using either digital or analog circuit components.

摘要翻译： 一种用于开关电源的校正电路，其中所述校正电路提供指示修改所述电源的脉冲宽度调制所需的占空比调整的校正信号，使得所述输出电感器电流与连接到所述电源的负载 电源。 校正电路可以与前馈和/或反馈控制电路结合使用。 校正电路可以使用数字或模拟电路部件来实现。

公开(公告)号：US07589506B2

公开(公告)日：2009-09-15

申请号：US11555955

申请日：2006-11-02

申请人： James Steven Brown

发明人： James Steven Brown

IPC分类号： G05F1/40 ,  G05F1/56

CPC分类号： H02M3/1588 ,  H02M2001/385 ,  Y02B70/1466

摘要： Apparatus for minimizing power losses associated with dead time between ON times of two series connected switches of a power converter connected across a supply potential, the apparatus comprising a control arrangement for monitoring a selected parameter associated with power loss during the dead time of the converter; the control arrangement changing the dead time from a first dead time to a second dead time and comparing the selected parameter associated with power loss for the first and second dead times and determining which of the power losses associated with the two dead times is smaller; a dead time implementing stage for implementing the two dead times; and the control arrangement selecting the dead time associated with the smaller power loss and providing a signal to the dead time implementing stage to set the selected dead time, wherein the control arrangement comprises a module sampling a signal related to the selected parameter associated with power loss at selected instants in time corresponding to the first and second dead times; and a processor for controlling timing of the sampling; and further comprising a comparator module for comparing power loss associated with the first and second dead times and for providing a signal indicating which dead time is associated with a smaller power loss and providing said signal to said processor to implement the dead time associated with the smaller power loss; further comprising an error compensating circuit coupled to said sampling module and to said comparator to reduce offset errors, introduced by either or both said sampling module and said comparator module. Also described is an apparatus to prevent trapping at sub-optimal dead times and for compensating for coherent load transients.

摘要翻译： 用于最小化与跨电源电位连接的功率转换器的两个串联连接的开关的接通时间之间的死区时间相关联的功率损耗的装置，所述装置包括用于在转换器的死区时间期间监视与功率损耗相关联的选定参数的控制装置; 所述控制装置将所述死区时间从第一死区时间改变为第二死区时间，并且将所选择的与所述第一和第二死区时间的功率损耗相关联的参数进行比较并确定与所述两个死区相关联的功率损耗中的哪一个较小; 实施两个死亡时期的死刑时间执行阶段; 并且所述控制装置选择与较小功率损耗相关联的死区时间，并向死区实施阶段提供信号以设置所选择的死区时间，其中所述控制装置包括对与所述选择的与功率损耗相关联的参数相关的信号进行采样的模块 在对应于第一和第二死亡时间的选定时刻; 以及用于控制采样定时的处理器; 并且还包括比较器模块，用于比较与第一和第二死区时间相关联的功率损耗，并且用于提供指示哪个死区时间与较小的功率损耗相关联的信号，并且向所述处理器提供所述信号以实现与较小的功率损耗相关联的死区时间 功率损耗 还包括耦合到所述采样模块和所述比较器的误差补偿电路，以减少由所述采样模块和所述比较器模块中的一个或两者引入的偏移误差。 还描述了一种用于在次最佳死区时间内捕获并用于补偿相干负载瞬变的装置。

公开(公告)号：US08779745B2

公开(公告)日：2014-07-15

申请号：US13034975

申请日：2011-02-25

申请人： James Steven Brown

发明人： James Steven Brown

IPC分类号： G05F1/00

CPC分类号： H02M3/33561 ,  H02J5/005 ,  H02J50/12 ,  H02M3/33569

摘要： A three-quarter bridge power converter includes a first switch configured to selectively couple a switch node to a higher voltage. The power converter also includes a second switch configured to selectively couple the switch node to a lower voltage. The power converter further includes a third switch configured to selectively cause a third voltage to be provided to the switch node when the first and second switches are not coupling the switch node to the higher and lower voltages. The third switch may be configured to selectively couple the switch node to an energy storage or energy source, such as a capacitor. The third switch may also be configured to selectively couple an energy storage or energy source to ground, where the energy storage or energy source is coupled to the switch node.

摘要翻译： 三分之三桥接电力转换器包括被配置为选择性地将开关节点耦合到较高电压的第一开关。 功率转换器还包括被配置为选择性地将开关节点耦合到较低电压的第二开关。 功率转换器还包括第三开关，其被配置为当第一和第二开关未将开关节点耦合到较高和较低的电压时，选择性地将第三电压提供给开关节点。 第三开关可以被配置为选择性地将开关节点耦合到诸如电容器的能量存储或能量源。 第三开关还可以被配置为选择性地将能量存储或能量源耦合到地，其中能量存储或能量源耦合到开关节点。

公开(公告)号：US08154782B1

公开(公告)日：2012-04-10

申请号：US12286605

申请日：2008-10-01

申请人： James Steven Brown

发明人： James Steven Brown

IPC分类号： G02B26/08 ,  H03L7/06

CPC分类号： G02B26/0833 ,  H03L7/06 ,  Y10S359/90

摘要： A method for generating a drive signal for a micro-electro-mechanical system (MEMS) scanner is provided. The method includes generating the drive signal for the MEMS scanner using a direct digital synthesis, numerically-controlled oscillator. For a particular embodiment, the drive signal is generated by receiving a summation of (i) an initial control word and (ii) an accumulated correction signal generated based on a comparison of a horizontal drive signal for the MEMS scanner and a horizontal sensor signal received from the MEMS scanner. The summation is added to a phase accumulator output, an address is extracted from the phase accumulator output, and a digital lookup table output is addressed based on the extracted address. The digital lookup table output is converted into an analog signal with a digital-to-analog converter, the analog signal is filtered to generate the drive signal, and the horizontal drive signal is generated based on the drive signal.

摘要翻译： 提供了一种用于产生微机电系统（MEMS）扫描器的驱动信号的方法。 该方法包括使用直接数字合成，数控振荡器产生MEMS扫描器的驱动信号。 对于特定实施例，通过接收（i）初始控制字和（ii）基于用于MEMS扫描仪的水平驱动信号和接收到的水平传感器信号的比较而生成的累积校正信号来产生驱动信号 来自MEMS扫描仪。 将求和相加到相位累加器输出，从相位累加器输出中提取地址，并且基于提取的地址寻址数字查找表输出。 数字查找表输出通过数/模转换器转换为模拟信号，模拟信号被滤波以产生驱动信号，并且基于驱动信号产生水平驱动信号。

公开(公告)号：US20090274629A1

公开(公告)日：2009-11-05

申请号：US12502129

申请日：2009-07-13

申请人： James Steven Brown

发明人： James Steven Brown

IPC分类号： A61K49/00

CPC分类号： A61L2/0082 ,  A61K8/0204 ,  A61K8/0241 ,  A61K8/042 ,  A61K2800/28 ,  A61Q17/005 ,  A61Q19/10 ,  C11D3/201 ,  C11D3/2013 ,  C11D3/48 ,  C11D17/0013 ,  C11D17/003

摘要： The invention provides a sanitizing composition in the form of a viscous liquid or gel suitable for use as a handwash composition comprising alcohol, water and a thickener wherein the viscous liquid or gel has particles suspended therein, wherein said particles provide the composition with a granular texture and are capable of being worn away when rubbed. The particles may deliver one or more agents to the skin e.g. antimicrobial, antibacterial or antiviral agents, emollients and/or moisturizers, fragrances, colourings or UV markers.

摘要翻译： 本发明提供一种粘稠液体或凝胶形式的消毒组合物，其适合用作包含醇，水和增稠剂的手洗组合物，其中粘性液体或凝胶具有悬浮于其中的颗粒，其中所述颗粒为组合物提供颗粒状结构 并且当被摩擦时能磨损掉。 颗粒可以将一种或多种试剂递送至皮肤，例如 抗微生物剂，抗菌剂或抗病毒剂，润肤剂和/或保湿剂，香料，着色剂或UV标记物。

公开(公告)号：US20140301896A1

公开(公告)日：2014-10-09

申请号：US14315474

申请日：2014-06-26

申请人： James Steven Brown

发明人： James Steven Brown

IPC分类号： A61L2/00

CPC分类号： A61L2/0082 ,  A61K8/0204 ,  A61K8/0241 ,  A61K8/042 ,  A61K2800/28 ,  A61Q17/005 ,  A61Q19/10 ,  C11D3/201 ,  C11D3/2013 ,  C11D3/48 ,  C11D17/0013 ,  C11D17/003

摘要： The invention provides a sanitizing composition in the form of a viscous liquid or gel suitable for use as a handwash composition comprising alcohol, water and a thickener wherein the viscous liquid or gel has particles suspended therein, wherein said particles provide the composition with a granular texture and are capable of being worn away when rubbed. The particles may deliver one or more agents to the skin e.g. antimicrobial, antibacterial or antiviral agents, emollients and/or moisturizers, fragrances, colorings or UV markers.

摘要翻译： 本发明提供一种粘稠液体或凝胶形式的消毒组合物，其适合用作包含醇，水和增稠剂的手洗组合物，其中粘性液体或凝胶具有悬浮于其中的颗粒，其中所述颗粒为组合物提供颗粒状结构 并且当被摩擦时能磨损掉。 颗粒可以将一种或多种试剂递送至皮肤，例如 抗微生物剂，抗菌剂或抗病毒剂，润肤剂和/或保湿剂，香料，着色剂或UV标记物。

公开(公告)号：US08059322B1

公开(公告)日：2011-11-15

申请号：US12283759

申请日：2008-09-16

申请人： James Steven Brown

发明人： James Steven Brown

IPC分类号： G02B26/08

CPC分类号： G02B26/0833

摘要： A system for suppressing undesirable oscillations in a micro-electro-mechanical system (MEMS) scanner is provided. The system includes a tunable notch filter and a MEMS scanner. The tunable notch filter is operable to receive an original drive signal and to generate a compensated drive signal based on the original drive signal. The MEMS scanner, which is coupled to the tunable notch filter, is operable to receive the compensated drive signal and to be driven by the compensated drive signal without oscillating at a first mode resonance frequency.

摘要翻译： 提供了一种用于抑制微机电系统（MEMS）扫描器中的不希望的振荡的系统。 该系统包括可调陷波滤波器和MEMS扫描仪。 可调陷波滤波器可操作以接收原始驱动信号并且基于原始驱动信号产生经补偿的驱动信号。 耦合到可调谐陷波滤波器的MEMS扫描器可操作以接收经补偿的驱动信号并由补偿的驱动信号驱动，而不以第一模式谐振频率振荡。