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1. 发明授权

US08959077B2 Multi-layer search-engine index 有权
标题翻译：多层搜索引擎索引
公开(公告)号：US08959077B2
公开(公告)日：2015-02-17
申请号：US13428709
申请日：2012-03-23
申请人： Hui Shen , Mao Yang , Lintao Zhang , Zhenyu Zhao , Xiao Wu , Ying Yan , Xiaosong Yang , Chad Walters , Choong Soon Chang
发明人： Hui Shen , Mao Yang , Lintao Zhang , Zhenyu Zhao , Xiao Wu , Ying Yan , Xiaosong Yang , Chad Walters , Choong Soon Chang
IPC分类号： G06F17/30
CPC分类号： G06F17/30864 , G06F17/30312
摘要： Subject matter described herein includes a multi-layer search-engine index. Accordingly, the search-engine index is divided into multiple indexes, each of which includes a respective set of information used to serve (i.e., respond to) a query. One index includes a term index, which organizes a set of terms that are found among a collection of documents. Another index includes a document index, which organizes a set of documents that are searchable. A computing device is used to serve the search-engine index (i.e., to analyze the index when identifying documents relevant to a search query). For example, a solid-state device might be used to serve the multi-layer search-engine index.
摘要翻译：本文描述的主题包括多层搜索引擎索引。因此，搜索引擎索引被分成多个索引，每个索引包括用于服务（即响应）查询的相应信息集合。一个索引包括术语索引，其组织在一组文档中找到的一组术语。另一个索引包括一个文档索引，它组织一组可搜索的文档。计算设备用于服务搜索引擎索引（即，当识别与搜索查询相关的文档时分析索引）。例如，可以使用固态设备来服务多层搜索引擎索引。

2. 发明申请

US20120271813A1 MULTI-LAYER SEARCH-ENGINE INDEX 有权
标题翻译：多层次搜索引擎索引
公开(公告)号：US20120271813A1
公开(公告)日：2012-10-25
申请号：US13428709
申请日：2012-03-23
申请人： HUI SHEN , Mao Yang , Lintao Zhang , Zhenyu Zhao , Xiao Wu , Ying Yan , Xiaosong Yang , Chad Walters , Choong Soon Chang
发明人： HUI SHEN , Mao Yang , Lintao Zhang , Zhenyu Zhao , Xiao Wu , Ying Yan , Xiaosong Yang , Chad Walters , Choong Soon Chang
IPC分类号： G06F17/30
CPC分类号： G06F17/30864 , G06F17/30312
摘要： Subject matter described herein includes a multi-layer search-engine index. Accordingly, the search-engine index is divided into multiple indexes, each of which includes a respective set of information used to serve (i.e., respond to) a query. One index includes a term index, which organizes a set of terms that are found among a collection of documents. Another index includes a document index, which organizes a set of documents that are searchable. A computing device is used to serve the search-engine index (i.e., to analyze the index when identifying documents relevant to a search query). For example, a solid-state device might be used to serve the multi-layer search-engine index.
摘要翻译：本文描述的主题包括多层搜索引擎索引。因此，搜索引擎索引被分成多个索引，每个索引包括用于服务（即响应）查询的相应信息集合。一个索引包括术语索引，其组织在一组文档中找到的一组术语。另一个索引包括一个文档索引，它组织一组可搜索的文档。计算设备用于服务搜索引擎索引（即，当识别与搜索查询相关的文档时分析索引）。例如，可以使用固态设备来服务多层搜索引擎索引。

3. 发明授权

US07778203B2 On-demand MAC address lookup 有权
标题翻译：按需MAC地址查询
公开(公告)号：US07778203B2
公开(公告)日：2010-08-17
申请号：US12024111
申请日：2008-02-01
申请人： Zhenyu Zhao , Xiaosong Yang , Dianfei Han
发明人： Zhenyu Zhao , Xiaosong Yang , Dianfei Han
IPC分类号： H04L12/28 , G06F15/16
CPC分类号： H04L29/12811 , H04L29/12301 , H04L61/2015 , H04L61/2076 , H04L61/6009
摘要： Described is looking up network information (e.g., port data) on demand upon receiving a (e.g., DHCP) request packet containing a MAC address. The MAC address may be looked up in a cache to find the port data. If not cached or cached but outdated, the lookup continues via a querying process that finds the relevant switch containing the port data; the cache is updated based on the querying process result. Successful querying results in a valid cache entry, while unsuccessful querying results in an invalid entry. For port data associated with the MAC address found via the cache or via querying, the port data is used to respond to the request packet, e.g., to assign an IP address to a network device corresponding to that MAC address. For a MAC address determined to be invalid via the cache or via querying, the request is rejected.
摘要翻译：描述了在接收到包含MAC地址的（例如DHCP）请求分组时，根据需要查找网络信息（例如，端口数据）。可以在缓存中查找MAC地址以查找端口数据。如果没有缓存或缓存但过时，则通过查询过程继续查找查找包含端口数据的相关交换机; 基于查询过程结果更新缓存。成功查询会导致有效的缓存条目，而查询失败会导致无效条目。对于与通过高速缓存或通过查询找到的MAC地址相关联的端口数据，端口数据用于响应请求分组，例如为与该MAC地址相对应的网络设备分配IP地址。对于通过缓存确定为无效的MAC地址或通过查询，请求被拒绝。

4. 发明申请

US20090196290A1 ON-DEMAND MAC ADDRESS LOOKUP 有权
公开(公告)号：US20090196290A1
公开(公告)日：2009-08-06
申请号：US12024111
申请日：2008-02-01
申请人： Zhenyu Zhao , Xiaosong Yang , Dianfei Han
发明人： Zhenyu Zhao , Xiaosong Yang , Dianfei Han
IPC分类号： H04L12/28
CPC分类号： H04L29/12811 , H04L29/12301 , H04L61/2015 , H04L61/2076 , H04L61/6009
摘要： Described is looking up network information (e.g., port data) on demand upon receiving a (e.g., DHCP) request packet containing a MAC address. The MAC address may be looked up in a cache to find the port data. If not cached or cached but outdated, the lookup continues via a querying process that finds the relevant switch containing the port data; the cache is updated based on the querying process result. Successful querying results in a valid cache entry, while unsuccessful querying results in an invalid entry. For port data associated with the MAC address found via the cache or via querying, the port data is used to respond to the request packet, e.g., to assign an IP address to a network device corresponding to that MAC address. For a MAC address determined to be invalid via the cache or via querying, the request is rejected.
摘要翻译：描述了在接收到包含MAC地址的（例如DHCP）请求分组时，根据需要查找网络信息（例如，端口数据）。可以在缓存中查找MAC地址以查找端口数据。如果没有缓存或缓存但过时，则通过查询过程继续查找查找包含端口数据的相关交换机; 基于查询过程结果更新缓存。成功查询会导致有效的缓存条目，而查询失败会导致无效条目。对于与通过高速缓存或通过查询找到的MAC地址相关联的端口数据，端口数据用于响应请求分组，例如为与该MAC地址相对应的网络设备分配IP地址。对于通过缓存确定为无效的MAC地址或通过查询，请求被拒绝。

5. 发明申请

US20110204862A1 DIGITAL CONTROL METHOD FOR IMPROVING HEAVY-TO-LIGHT (STEP DOWN) LOAD TRANSIENT RESPONSE OF SWITCH MODE POWER SUPPLIES 有权
标题翻译：用于改善开关模式电源的负载过渡响应的数字控制方法
公开(公告)号：US20110204862A1
公开(公告)日：2011-08-25
申请号：US12708871
申请日：2010-02-19
申请人： Aleksandar Prodic , Zhenyu Zhao
发明人： Aleksandar Prodic , Zhenyu Zhao
IPC分类号： G05F1/46
CPC分类号： H02M3/158
摘要： A method for improving heavy-to-light load transient response in low-power switch-mode power supplies is described. It uses a negative voltage input power rail and a digital controller with an extended duty ratio control value to provide faster discharging current slew rate in the switched mode power supplies (SMPS) inductor.
摘要翻译：描述了一种在低功率开关模式电源中改善重轻负载瞬态响应的方法。它使用负电压输入电源轨和具有扩展占空比控制值的数字控制器，以在开关模式电源（SMPS）电感器中提供更快的放电电流转换速率。

6. 发明授权

US08487600B2 Continuous-time digital controller for high-frequency DC-DC converters 失效
标题翻译：用于高频DC-DC转换器的连续数字控制器
公开(公告)号：US08487600B2
公开(公告)日：2013-07-16
申请号：US12100556
申请日：2008-04-10
申请人： Aleksandar Prodic , Zhenyu Zhao
发明人： Aleksandar Prodic , Zhenyu Zhao
IPC分类号： G05F1/575
CPC分类号： H02M3/157 , H03K7/08
摘要： The present invention is a voltage mode digital controller for low-power high-frequency dc-dc converters that has recovery time approaching physical limitations of a given power stage. It consists of a digital controller with load transient response approaching physical limitations of a given power stage that is suitable for low-power SMPS. In one aspect the invention is a method of utilizing a continuous-time digital signal processor (CT-DSP) for regulation of the operation of switch-mode power supplies. A CT-DSP can be used to instantaneously detect changes of voltage or current during transition periods and immediately perform control action that results in the fastest possible response. The invention may include current program mode controllers for SMPS where the input current is sensed as well as power factor correction rectifiers (PFC), where often input voltage, input current and output voltage are sensed. Upon sensing a deviation in the input voltage the CT-DSP is utilized to apply a switch-mode power operation whereby the controller switches between continuous-time and digital function.
摘要翻译：本发明是用于低功率高频dc-dc转换器的电压模式数字控制器，其具有接近给定功率级的物理限制的恢复时间。它包括一个数字控制器，负载瞬态响应接近适用于低功耗SMPS的给定功率级的物理限制。一方面，本发明是利用连续时间数字信号处理器（CT-DSP）来调节开关电源的操作的方法。 CT-DSP可用于瞬时检测过渡期间电压或电流的变化，并立即执行控制动作，从而实现最快的响应。本发明可以包括用于感测输入电流的SMPS的当前编程模式控制器以及感测输入电压，输入电流和输出电压的功率因数校正整流器（PFC）。当感测到输入电压的偏差时，CT-DSP被用于施加开关模式电源操作，由此控制器在连续时间和数字功能之间切换。

7. 发明授权

US08274264B2 Digital control method for improving heavy-to-light (step down) load transient response of switch mode power supplies 有权
标题翻译：用于改善开关模式电源的重轻（降压）负载瞬态响应的数字控制方法
公开(公告)号：US08274264B2
公开(公告)日：2012-09-25
申请号：US12708871
申请日：2010-02-19
申请人： Aleksandar Prodic , Zhenyu Zhao
发明人： Aleksandar Prodic , Zhenyu Zhao
IPC分类号： G05F1/00
CPC分类号： H02M3/158
摘要： A method for improving heavy-to-light load transient response in low-power switch-mode power supplies is described. It uses a negative voltage input power rail and a digital controller with an extended duty ratio control value to provide faster discharging current slew rate in the switched mode power supplies (SMPS) inductor.
摘要翻译：描述了一种在低功率开关模式电源中改善重轻负载瞬态响应的方法。它使用负电压输入电源轨和具有扩展占空比控制值的数字控制器，以在开关模式电源（SMPS）电感器中提供更快的放电电流转换速率。

8. 发明申请

US20120153916A1 DIGITAL BOOST FEEDBACK VOLTAGE CONTROLLER FOR SWITCH-MODE POWER SUPPLIES USING PULSE-FREQUENCY MODULATION 有权
标题翻译：数字升压反馈电压控制器，用于使用脉冲频率调制的开关电源
公开(公告)号：US20120153916A1
公开(公告)日：2012-06-21
申请号：US12974903
申请日：2010-12-21
申请人： Jason Weinstein , Zhenyu Zhao , Jingquan Chen
发明人： Jason Weinstein , Zhenyu Zhao , Jingquan Chen
IPC分类号： G05F1/618
CPC分类号： H02M3/07 , H02M3/157 , H02M3/1588 , Y02B70/1466
摘要： A controller produces high-side and low-side control signals. The high and low-side signals are used to switch high-side and low-side transistors in the power stage to control the voltage across the power stage output capacitor of the power stage. A boost feedback charge pump receives the low or high-side signal to increase the charge on a charge pump output capacitor. The controller is configured to send Pulse Frequency Modulation (PFM) high and low-side signals that control the voltage on the power stage output capacitor and charge the charge pump output capacitor. The controller is also configured to send boost feedback (BFB) high and low-side signals that charge the boost feedback capacitor, but are designed to not significantly change the charge on the power stage output capacitor.
摘要翻译：控制器产生高端和低端控制信号。高低侧信号用于切换功率级的高侧和低侧晶体管，以控制功率级功率级输出电容器两端的电压。升压反馈电荷泵接收低电平或高边信号以增加电荷泵输出电容器上的电荷。控制器配置为发送脉冲频率调制（PFM）高和低侧信号，控制功率级输出电容器的电压，并对电荷泵输出电容器充电。控制器还配置为发送升压反馈（BFB）高压和低压信号，为升压反馈电容充电，但被设计为不会显着改变功率级输出电容器的电荷。

9. 发明授权

US08085024B2 Self-tuning digital current estimator for low-power switching converters 有权
标题翻译：用于低功率开关转换器的自调谐数字电流估计器
公开(公告)号：US08085024B2
公开(公告)日：2011-12-27
申请号：US12423338
申请日：2009-04-14
申请人： Aleksandar Prodic , Zdravko Lukic , Zhenyu Zhao , Sheikh Mohammad Ahsanuzzaman
发明人： Aleksandar Prodic , Zdravko Lukic , Zhenyu Zhao , Sheikh Mohammad Ahsanuzzaman
IPC分类号： G05F1/575
CPC分类号： H02M3/157 , G01R19/0092 , G01R19/25 , H02M2001/0009
摘要： A switched mode power can use a digital controller to control the switching of the at least one switch of the switched mode power supply. The current through the power inductor can be estimated using a self-tuning digital current estimator.
摘要翻译：开关模式电源可以使用数字控制器来控制开关模式电源的至少一个开关的切换。可以使用自调谐数字电流估计器来估计通过功率电感器的电流。

10. 发明授权

US07586767B1 Limit-cycle oscillation (LCO) based switch-mode power supply (SMPS) response evaluation 有权
标题翻译：基于限流循环振荡（LCO）的开关电源（SMPS）响应评估
公开(公告)号：US07586767B1
公开(公告)日：2009-09-08
申请号：US12107843
申请日：2008-04-23
申请人： Aleksandar Prodic , Zhenyu Zhao
发明人： Aleksandar Prodic , Zhenyu Zhao
IPC分类号： H02J1/10
CPC分类号： H02M3/157 , H02M1/088 , H02M3/158 , H02M2001/0032 , Y02B70/16
摘要： A limit-cycle oscillation (LCO) based switch-mode power supply (SMPS) response evaluation provides an effective mechanism for determining the characteristic response of an SMPS during normal operation of the SMPS. LCOs are induced in the SMPS loop by introducing a non-linearity in the loop, for example, decreasing the resolution of a pulse-width modulator that controls the SMPS switching circuit. The frequency and amplitude of the LCOs are determined and used to evaluate the characteristic response of the SMPS. In order to produce symmetric LCOs, which are more easily modeled, a zero-offset calibration circuit adjusts values provided to the pulse-width modulator, so that each value introduced during calibration is at the midpoint of a resolution cell. The frequency can be measured by counting between zero-crossings of the LCOs and the amplitude measured by capturing the LCO values immediately prior to each zero-crossing of a first difference of the LCO samples.
摘要翻译：基于极限循环振荡（LCO）的开关模式电源（SMPS）响应评估提供了一种用于在SMPS正常工作期间确定SMPS的特性响应的有效机制。通过在环路中引入非线性，例如降低控制SMPS开关电路的脉冲宽度调制器的分辨率，在SMPS环路中感应LCO。确定LCO的频率和振幅，并用于评估SMPS的特性响应。为了产生更容易建模的对称LCO，零偏移校准电路调整提供给脉冲宽度调制器的值，使得在校准期间引入的每个值处于分辨率单元的中点。可以通过在LCO样品的第一个差异的每个过零点之前立即计数LCO的零交叉和通过捕获LCO值测量的振幅来测量频率。

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