公开(公告)号：US07071660B2

公开(公告)日：2006-07-04

申请号：US11018920

申请日：2004-12-22

申请人： Ming Xu ,  Jinghai Zhou ,  Yuancheng Ren ,  Fred C. Lee ,  Jia Wei

发明人： Ming Xu ,  Jinghai Zhou ,  Yuancheng Ren ,  Fred C. Lee ,  Jia Wei

IPC分类号： H02M3/158

CPC分类号： H02M3/156 ,  H02M2001/0019 ,  H02M2001/0032 ,  H02M2001/007 ,  Y02B70/16

摘要： A two-stage power converter that dynamically adjusts to output current requirements includes a first stage regulator that provides power to a second stage regulator. The first stage can be a buck converter, and the second stage can be a multiple-phase buck converter. The output voltage of the first stage (intermediate bus voltage Vbus) is varied according to the load current to optimize conversion efficiency. To provide maximum efficiency, the Vbus voltage is increased as load current increases. The Vbus voltage provided by the first stage can be varied by duty cycle or operating frequency control. In another embodiment, the switching frequency of the second stage is varied as output current changes so that output current ripple is held constant. In an embodiment employing a multiple-phase buck converter in the second stage, the number of operating phases are varied as output current changes.

摘要翻译： 动态调节输出电流要求的两级功率转换器包括为第二级调节器提供电源的第一级稳压器。 第一级可以是降压转换器，第二级可以是多相降压转换器。 第一级（中间总线电压Vbus）的输出电压根据负载电流而变化，以优化转换效率。 为了提供最大的效率，Vbus电压随着负载电流的增加而增加。 第一级提供的Vbus电压可以通过占空比或工作频率控制来改变。 在另一个实施例中，当输出电流改变时，第二级的开关频率变化，使得输出电流纹波保持恒定。 在第二级采用多相降压转换器的实施例中，随着输出电流的变化，工作阶段的数量变化。

公开(公告)号：US20050184713A1

公开(公告)日：2005-08-25

申请号：US11018920

申请日：2004-12-22

申请人： Ming Xu ,  Jinghai Zhou ,  Yuancheng Ren ,  Fred Lee ,  Jia Wei

发明人： Ming Xu ,  Jinghai Zhou ,  Yuancheng Ren ,  Fred Lee ,  Jia Wei

IPC分类号： G05F1/40 ,  H02M3/156

CPC分类号： H02M3/156 ,  H02M2001/0019 ,  H02M2001/0032 ,  H02M2001/007 ,  Y02B70/16

摘要： A two-stage power converter that dynamically adjusts to output current requirements includes a first stage regulator that provides power to a second stage regulator. The first stage can be a buck converter, and the second stage can be a multiple-phase buck converter. The output voltage of the first stage (intermediate bus voltage Vbus) is varied according to the load current to optimize conversion efficiency. To provide maximum efficiency, the Vbus voltage is increased as load current increases. The Vbus voltage provided by the first stage can be varied by duty cycle or operating frequency control. In another embodiment, the switching frequency of the second stage is varied as output current changes so that output current ripple is held constant. In an embodiment employing a multiple-phase buck converter in the second stage, the number of operating phases are varied as output current changes.

摘要翻译： 动态调节输出电流要求的两级功率转换器包括为第二级调节器提供电源的第一级稳压器。 第一级可以是降压转换器，第二级可以是多相降压转换器。 第一级（中间总线电压Vbus）的输出电压根据负载电流而变化，以优化转换效率。 为了提供最大的效率，Vbus电压随着负载电流的增加而增加。 第一级提供的Vbus电压可以通过占空比或工作频率控制来改变。 在另一个实施例中，当输出电流改变时，第二级的开关频率变化，使得输出电流纹波保持恒定。 在采用第二级中的多相降压转换器的实施例中，随着输出电流的变化，工作阶段的数量变化。

公开(公告)号：US07161335B2

公开(公告)日：2007-01-09

申请号：US10781931

申请日：2004-02-20

申请人： Jia Wei ,  Ming Xu ,  Fred C. Lee

发明人： Jia Wei ,  Ming Xu ,  Fred C. Lee

IPC分类号： G05F1/00 ,  G05F1/573

CPC分类号： H02M3/156 ,  H02M2001/0019 ,  H02M2001/0032 ,  H02M2001/007 ,  Y02B70/16

摘要： Alteration of voltage input to a voltage regulator output stage from a Vbus regulator stage in a two-stage voltage regulator provides optimal Vbus voltage placement for a wide range of current loads to increase voltage regulator efficiency and is particularly suited to CPUs having power-saving sleep modes of operation. An optimal voltage is selected or developed in response to information concerning operational mode or current consumption of the powered device. As a perfecting feature of one embodiment of the invention in which a discrete Vbus voltage is selected based on operational mode, the selected voltage is adjusted to further optimize the matching of the Vbus voltage placement to the load and provides a continuous range of voltages. In a second embodiment the entire Vbus positioning function is performed in response to current load information. A feed-forward arrangement is provided to avoid transient spikes as the Vbus voltage placement is altered.

摘要翻译： 在两级电压调节器中，从V＆lt;＆gt;总线调节器级改变电压调节器输出级的电压输入，为宽范围的电流负载提供最佳的V SUB总线电压放置 以提高电压调节器的效率，特别适用于具有省电睡眠操作模式的CPU。 响应于关于被动设备的操作模式或电流消耗的信息来选择或开发最佳电压。 作为其中基于操作模式选择离散V母线电压的本发明的一个实施例的完美特征，调整所选择的电压以进一步优化V＆lt;总线＆lt; SUB>电压放置到负载并提供连续的电压范围。 在第二实施例中，响应于当前负载信息执行整个总线定位功能。 提供了前馈装置，以避免当V母线电压放置被改变时的瞬态尖峰。

公开(公告)号：US06784644B2

公开(公告)日：2004-08-31

申请号：US10079819

申请日：2002-02-22

申请人： Peng Xu ,  Kaiwei Yao ,  Fred C. Lee ,  Mao Ye ,  Jia Wei

发明人： Peng Xu ,  Kaiwei Yao ,  Fred C. Lee ,  Mao Ye ,  Jia Wei

IPC分类号： G05F1613

CPC分类号： H02M3/158 ,  H02M3/1584 ,  H02M2001/0064

摘要： Voltage regulation, transient response and efficiency of a voltage regulator module (VRM) is improved where short duty cycles are necessitated by large differentials of input and output voltage by including at least one clamping of a tap of an inductance in series with an output of each of a plurality of parallel branches or phases which are switched in a complementary fashion or providing coupling between inductors of respective phases. Such coupling between inductors is achieved in a small module with an integrated magnetic structure. Reduced component counts are achieved while deriving built-in input and output filters. Principals of the invention can be extended to isolation applications and push-pull forward converts, in particular. A lossless clamping circuit is also provided allowing spike currents to be suppressed while returning power to the output of the VRM.

摘要翻译： 电压调节，瞬态响应和电压调节器模块（VRM）的效率得到改善，其中通过输入和输出电压的大差分需要短占空比，包括至少一次电感抽头与每个输出的输出串联 多个平行分支或相位以互补方式切换或提供各相电感器之间的耦合。 在具有集成磁性结构的小型模块中实现电感器之间的这种耦合。 在导出内置输入和输出滤波器时实现了减少的元件数量。 特别是本发明的原理可以扩展到隔离应用和推挽式前向转换器。 还提供了一种无损钳位电路，允许抑制尖峰电流，同时向VRM的输出返回功率。

公开(公告)号：US06757184B2

公开(公告)日：2004-06-29

申请号：US10339576

申请日：2003-01-10

申请人： Jia Wei ,  Fred C. Lee

发明人： Jia Wei ,  Fred C. Lee

IPC分类号： H02M324

CPC分类号： H02M3/1584

摘要： A power converter with high efficiency, low component count, and high step down conversion capability. The converter has a full bridge circuit connected to a pair of buck output circuits. The full bridge circuit and buck circuits are not isolated. In one embodiment, a transformer is connected between the full bridge and buck circuits without providing isolation. In operation, the transformer is operated as an autotransformer, which results in reduced voltages and currents applied to the switches. As a result, the present invention is capable of reduced switching losses, lower output voltage and other benefits. The present invention also includes an embodiment having coupled inductors instead of a transformer. Also, the present invention includes embodiments having additional parallel buck output circuits for higher power and higher current capability.

摘要翻译： 电源转换器，效率高，元件数量低，降压转换能力强。 转换器具有连接到一对降压输出电路的全桥电路。 全桥电路和降压电路不隔离。 在一个实施例中，变压器连接在全桥和降压电路之间，而不提供隔离。 在工作中，变压器作为自耦变压器工作，这导致施加到开关的电压和电流降低。 结果，本发明能够降低开关损耗，降低输出电压等优点。 本发明还包括具有耦合电感器而不是变压器的实施例。 此外，本发明还包括具有用于更高功率和更高电流能力的附加并联降压输出电路的实施例。

公开(公告)号：US20050184712A1

公开(公告)日：2005-08-25

申请号：US10781931

申请日：2004-02-20

申请人： Jia Wei ,  Ming Xu ,  Fred Lee

发明人： Jia Wei ,  Ming Xu ,  Fred Lee

IPC分类号： G05F1/40 ,  H02M3/156

CPC分类号： H02M3/156 ,  H02M2001/0019 ,  H02M2001/0032 ,  H02M2001/007 ,  Y02B70/16

摘要： Alteration of voltage input to a voltage regulator output stage from a Vbus regulator stage in a two-stage voltage regulator provides optimal Vbus voltage placement for a wide range of current loads to increase voltage regulator efficiency and is particularly suited to CPUs having power-saving sleep modes of operation. An optimal voltage is selected or developed in response to information concerning operational mode or current consumption of the powered device. As a perfecting feature of one embodiment of the invention in which a discrete Vbus voltage is selected based on operational mode, the selected voltage is adjusted to further optimize the matching of the Vbus voltage placement to the load and provides a continuous range of voltages. In a second embodiment the entire Vbus positioning function is performed in response to current load information. A feed-forward arrangement is provided to avoid transient spikes as the Vbus voltage placement is altered.

摘要翻译： 在两级电压调节器中，从V＆lt;＆gt;总线调节器级改变电压调节器输出级的电压输入，为宽范围的电流负载提供最佳的V SUB总线电压放置 以提高电压调节器的效率，特别适用于具有省电睡眠操作模式的CPU。 响应于关于被动设备的操作模式或电流消耗的信息来选择或开发最佳电压。 作为其中基于操作模式选择离散V母线电压的本发明的一个实施例的完美特征，调整所选择的电压以进一步优化V＆lt;＆lt; SUB>电压放置到负载并提供连续的电压范围。 在第二实施例中，响应于当前负载信息执行整个总线定位功能。 提供了前馈装置，以避免当V母线电压放置被改变时的瞬态尖峰。

公开(公告)号：US09175103B2

公开(公告)日：2015-11-03

申请号：US13703212

申请日：2011-06-10

申请人： Lawrence R. Sita ,  Jia Wei ,  Wei Zhang

发明人： Lawrence R. Sita ,  Jia Wei ,  Wei Zhang

IPC分类号： C08F4/643 ,  C08F4/6592 ,  C08F210/00 ,  C08F210/16 ,  C08F4/659

CPC分类号： C08F4/643 ,  C08F4/65908 ,  C08F4/6592 ,  C08F210/16 ,  C08F2410/01 ,  C08F2420/01 ,  C08F2420/02 ,  C08F210/14 ,  C08F2500/03 ,  C08F2/38

摘要： Disclosed is a method of producing a polyolefin composition comprising contacting a metal alkyl and a first olefin monomer, then adding a first co-catalyst, a second co-catalyst, a pre-catalyst, and a second olefin monomer. The method allows for the production of a series of copolymers with tunable incorporation ratios of the first olefin monomer. The method also allows for the production of polyolefins of low molecular weights and narrow molecular weight distributions.

摘要翻译： 公开了一种生产聚烯烃组合物的方法，包括使烷基金属和第一烯烃单体接触，然后加入第一助催化剂，第二助催化剂，预催化剂和第二烯烃单体。 该方法允许制备一系列具有可调谐的第一烯烃单体掺入比的共聚物。 该方法还允许生产低分子量和窄分子量分布的聚烯烃。

公开(公告)号：US08097417B2

公开(公告)日：2012-01-17

申请号：US12380103

申请日：2009-02-23

申请人： Liping Zhao ,  Wei Hua ,  Xiaoyan Pang ,  Jia Wei ,  Dazheng Wu

发明人： Liping Zhao ,  Wei Hua ,  Xiaoyan Pang ,  Jia Wei ,  Dazheng Wu

IPC分类号： C12Q1/68 ,  C12P19/34

CPC分类号： C12Q1/6886 ,  C12Q1/6888

摘要： Non-invasive methods for monitoring the effect of an agent for treating colorectal cancer, comprising (1) collecting fecal samples from healthy subjects, subjects having precancerous lesions, and subject having precancerous lesions and being treated with an anti-cancer agent; (2) isolating total microbial genomic DNA from the fecal samples to provide total microbial genomic DNA; (3) comparing the total microbial genomic DNA using fingerprint spectrum analysis; (4) identifying key fingerprint bands correlated with the effect of the anti-cancer agent; (5) identifying key microorganisms associated with the key fingerprint bands; (6) designing microbial sequence-specific primers and probes; and (7) determining the quantitative differences of the key microorganisms in fecal samples to identify an indicator microorganism for monitoring the effect of the anti-cancer agent.

摘要翻译： 用于监测药物治疗结肠直肠癌的效果的非侵入性方法，包括（1）从健康受试者收集粪便样品，患有癌前病变的受试者和患有癌前病变的受试者并用抗癌剂治疗; （2）从粪便样品中分离总微生物基因组DNA以提供总微生物基因组DNA; （3）使用指纹谱分析比较总微生物基因组DNA; （4）识别与抗癌剂作用相关的关键指纹带; （5）识别与关键指纹带相关的关键微生物; （6）设计微生物序列特异性引物和探针; 和（7）确定粪便样品中关键微生物的定量差异，以鉴定用于监测抗癌剂效果的指示剂微生物。

公开(公告)号：US07443146B2

公开(公告)日：2008-10-28

申请号：US11519516

申请日：2006-09-12

申请人： Jia Wei ,  Kun Xing

发明人： Jia Wei ,  Kun Xing

IPC分类号： G05F3/16 ,  G05F1/00

CPC分类号： H02M3/1584 ,  H02M2001/0064

摘要： Conduction loss in the body-diode of a low side MOSFET of a power switching stage of one phase of a coupled-inductor, multi-phase DC-DC converter circuit, associated with current flow in the output inductor of that one phase that is induced by current flow in a mutually coupled output inductor of another phase, during normal switching of that other stage, is effectively prevented by applying auxiliary MOSFET turn-on signals, that coincide with the duration of the induced current, to that low side MOSFET, so that the induced current will flow through the turned-on low side MOSFET itself, thereby by-passing its body-diode.

摘要翻译： 耦合电感器，多相DC-DC转换器电路的一相的功率开关级的低侧MOSFET的体二极管中的导通损耗与引起的该相的输出电感器中的电流相关联 通过在该另一级的正常切换期间在另一相的相互耦合的输出电感器中的电流流动，通过将与感应电流的持续时间相一致的辅助MOSFET导通信号施加到该低侧MOSFET而被有效地防止，因此 感应电流将流过导通的低端MOSFET本身，从而旁路其体二极管。

公开(公告)号：US09755520B2

公开(公告)日：2017-09-05

申请号：US12651985

申请日：2010-01-04

申请人： Jia Wei ,  Kun Xing

发明人： Jia Wei ,  Kun Xing

IPC分类号： H02M3/158 ,  H02M1/00

CPC分类号： H02M3/1584 ,  H02M3/1588 ,  H02M2001/0064 ,  Y02B70/1466

摘要： An embodiment of a power-supply controller includes first and second circuits. The first circuit is operable to cause a first current to flow through a first phase of a power supply. And the second circuit is operable to cause the second phase of the power supply to operate in a reduced-power-dissipation mode for at least a portion of a time period during which a second current magnetically induced by the first current flows through the second phase.