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1. 发明申请

US20050083116A1 Detection of DC output levels from a class D amplifier 有权
标题翻译：从D类放大器检测直流输出电平
公开(公告)号：US20050083116A1
公开(公告)日：2005-04-21
申请号：US10963239
申请日：2004-10-12
申请人： Lars Risbo , James Teng
发明人： Lars Risbo , James Teng
IPC分类号： H03F3/38
CPC分类号： H03F3/217 , H03F1/52
摘要： A class AD audio amplifier system (10) with DC output detection logic (26) is disclosed. The amplifier system (10) includes multiple audio channels (20), each of which includes a pulse-width-modulator (PWM) (24). The DC detection logic (26) includes a sigma-delta modulator (60) and a digital low-pass filter (62) that monitors the PWM output signals from the PWM modulators (24). The sigma-delta modulator (60) operates at a first clock frequency, while the low-pass filter (62) operates at a much lower clock frequency, so that AC audio components, PWM harmonics, and sigma-delta quantization error is suppressed from the DC detection. The modulated filtered signal is compared against a threshold level (THRSH) to determine whether the amplitude of a DC component at the PWM output is sufficiently high to constitute a fault. If so, a fault detection signal (DC_DET) is issued, and the PWM modulators (24) are disabled to prevent unsafe conditions in the system (10).
摘要翻译：公开了一种具有DC输出检测逻辑（26）的AD类音频放大器系统（10）。放大器系统（10）包括多个音频通道（20），每个音频通道包括脉宽调制器（PWM）（24）。直流检测逻辑（26）包括一个Σ-Δ调制器（60）和数字低通滤波器（62），用于监视来自PWM调制器（24）的PWM输出信号。 Σ-Δ调制器（60）以第一时钟频率工作，而低通滤波器（62）以低得多的时钟频率工作，从而抑制AC音频分量，PWM谐波和Σ-Δ量化误差直流检测。将调制的滤波信号与阈值电平（THRSH）进行比较，以确定PWM输出处的DC分量的幅度是否足够高以构成故障。如果是，则发出故障检测信号（DC_DET），并且PWM调制器（24）被禁用以防止系统（10）中的不安全状况。

2. 发明授权

US07078964B2 Detection of DC output levels from a class D amplifier 有权
标题翻译：从D类放大器检测直流输出电平
公开(公告)号：US07078964B2
公开(公告)日：2006-07-18
申请号：US10963239
申请日：2004-10-12
申请人： Lars Risbo , James Teng
发明人： Lars Risbo , James Teng
IPC分类号： H03F3/38
CPC分类号： H03F3/217 , H03F1/52
摘要： A class AD audio amplifier system (10) with DC output detection logic (26) is disclosed. The amplifier system (10) includes multiple audio channels (20), each of which includes a pulse-width-modulator (PWM) (24). The DC detection logic (26) includes a sigma-delta modulator (60) and a digital low-pass filter (62) that monitors the PWM output signals from the PWM modulators (24). The sigma-delta modulator (60) operates at a first clock frequency, while the low-pass filter (62) operates at a much lower clock frequency, so that AC audio components, PWM harmonics, and sigma-delta quantization error is suppressed from the DC detection. The modulated filtered signal is compared against a threshold level (THRSH) to determine whether the amplitude of a DC component at the PWM output is sufficiently high to constitute a fault. If so, a fault detection signal (DC_DET) is issued, and the PWM modulators (24) are disabled to prevent unsafe conditions in the system (10).
摘要翻译：公开了具有DC输出检测逻辑（26）的AD类音频放大器系统（10）。放大器系统（10）包括多个音频通道（20），每个音频通道包括脉宽调制器（PWM）（24）。直流检测逻辑（26）包括一个Σ-Δ调制器（60）和数字低通滤波器（62），用于监视来自PWM调制器（24）的PWM输出信号。 Σ-Δ调制器（60）以第一时钟频率工作，而低通滤波器（62）以低得多的时钟频率工作，从而抑制AC音频分量，PWM谐波和Σ-Δ量化误差直流检测。将调制的滤波信号与阈值电平（THRSH）进行比较，以确定PWM输出处的DC分量的幅度是否足够高以构成故障。如果是，则发出故障检测信号（DC_DET），并且PWM调制器（24）被禁用以防止系统（10）中的不安全状况。

3. 发明申请

US20090174485A1 OVER-CURRENT SENSING DURING NARROW GATE DRIVE OPERATION OF CLASS D OUTPUT STAGES 有权
标题翻译： N型门驱动期间的超电流感测D类输出级的操作
公开(公告)号：US20090174485A1
公开(公告)日：2009-07-09
申请号：US11970289
申请日：2008-01-07
申请人： James Teng , Qiong M. Li , Cetin Kaya
发明人： James Teng , Qiong M. Li , Cetin Kaya
IPC分类号： H03F1/52 , H03F3/217
CPC分类号： H03F3/2173 , H03F1/523 , H03F2200/03 , H03F2200/351
摘要： Two transistors of a class D output stage are driven by complementary, variable duty cycle signals PWM+ and PWM−. When the pulse width of the PWM+ signal becomes too narrow for reliable operation of prior art over-current protection circuits sensing the drain to source voltage of FET1 driven by PWM+, a Narrow Pulse Detector generates a signal indicative of this narrow pulse condition. A Negative Current Sense circuit measures the drain to source voltage across FET2 during the much longer conduction time of FET2 driven by PWM−. Because of the energy stored in the series inductor coupled to the output of the class D stage, a negative current flows through this FET2 during its conduction time. The resulting drain to source voltage of FET2 is measured and compared to a threshold. If the voltage indicative of current is over the threshold, and the Narrow Pulse Detector output indicates a narrow pulse condition, then an inhibit signal is generated which reduces current. A second Negative Current Sense circuit is utilized to similarly detect over-current conditions when the pulse width of PWM− becomes too narrow for reliable operation of prior art over-current protection circuits, thus protecting both FETs in the class D output stage from excessive current.
摘要翻译： D类输出级的两个晶体管由互补的可变占空比信号PWM +和PWM-驱动。当PWM +信号的脉冲宽度变得太窄，以便于感测由PWM +驱动的FET1的漏极 - 源极电压的现有技术的过电流保护电路的可靠操作时，窄脉冲检测器产生指示该窄脉冲条件的信号。在由PWM驱动的FET2的更长的导通时间内，负电流检测电路测量FET2两端的漏源电压。由于存储在串联电感器中的能量耦合到D级的输出端，所以在其导通时间期间，负电流流过该FET2。测量FET2的所得到的源极到源极电压并将其与阈值进行比较。如果指示电流的电压超过阈值，并且窄脉冲检测器输出指示窄脉冲条件，则产生减少电流的禁止信号。使用第二负电流检测电路来类似地检测当PWM的脉冲宽度变得太窄以致于现有技术的过电流保护电路的可靠操作时的过电流状况，从而保护D类输出级中的两个FET免受过大的电流。

4. 发明申请

US20070055687A1 System and method for minimizing data outage time and data loss while handling errors detected during recovery 失效
标题翻译：减少数据中断时间和数据丢失的系统和方法，同时处理在恢复期间检测到的错误
公开(公告)号：US20070055687A1
公开(公告)日：2007-03-08
申请号：US11219409
申请日：2005-09-02
申请人： Jeffrey Josten , Laura Kunioka-Weis , Thomas Majithia , Haakon Roberts , James Teng
发明人： Jeffrey Josten , Laura Kunioka-Weis , Thomas Majithia , Haakon Roberts , James Teng
IPC分类号： G06F7/00
CPC分类号： G06F17/30371 , Y10S707/99953
摘要： A system, method and a computer usable medium tangibly embodying a program of instructions executable by the computer to perform a computer-based method for restoration of a database from a failed data recovery. For each failed data recovery the method generates a log error data set having log records of a faulty transaction unapplied to data due to inconsistency. Log error data set is directly useable by a log analysis tool to regenerate and redo the unapplied faulty transaction to recover the data and by a print log tool to diagnose the faulty transaction. Log records mimic format of records of an archive log data set and identify data objects, faulty transactions on the data objects and a range of the unapplied data objects' updates.
摘要翻译：一种系统，方法和计算机可用介质，其有形地体现由计算机执行的指令程序，以执行用于从故障数据恢复恢复数据库的基于计算机的方法。对于每个失败的数据恢复，该方法生成一个日志错误数据集，其中由于不一致性而导致的错误事务的日志记录未应用于数据。日志错误数据集可以由日志分析工具直接使用，以重新生成并重做未应用的故障事务以恢复数据，并通过打印日志工具来诊断故障事务。日志记录模拟存档日志数据集记录的格式，并识别数据对象，数据对象上的故障事务和一系列未应用的数据对象的更新。

5. 发明申请

US20060230013A1 System and method for performing just-in-time priming of a database cache 有权
标题翻译：用于执行数据库高速缓存的即时启动的系统和方法
公开(公告)号：US20060230013A1
公开(公告)日：2006-10-12
申请号：US11303714
申请日：2005-12-16
申请人： Namik Hrle , James Teng
发明人： Namik Hrle , James Teng
IPC分类号： G06F17/30
CPC分类号： G06F17/30442 , G06F17/3048 , G06F17/30492
摘要： A system for retrieving stored data and/or index pages, receives a database request, generates an access plan for the database request for accessing data rows and/or index entries according to the statement, and generates a priming process by selecting a set of data and/or index pages. The set of data and/or index pages is a super-set or the exact set of the pages needed for accessing data rows and/or index entries according to the access plan. The present system retrieves the data and/or index pages of the set before executing the database request according to the access plan. The execution of the database request is performed by scanning the index and data pages preloaded into the cache. This reduces the number of necessary disk reads during execution.
摘要翻译：一种用于检索存储的数据和/或索引页面的系统，接收数据库请求，根据该语句生成访问数据行和/或索引条目的数据库请求的访问计划，并通过选择一组数据来生成启动过程和/或索引页。一组数据和/或索引页是根据访问计划访问数据行和/或索引条目所需的超集或精确的页面集合。根据访问计划，本系统在执行数据库请求之前检索该集合的数据和/或索引页。通过扫描预先加载到缓存中的索引和数据页执行数据库请求。这样可以减少执行期间所需的磁盘读取次数。

6. 发明申请

US20050091233A1 Method and system for preserving an original table schema 失效
标题翻译：用于保留原始表模式的方法和系统
公开(公告)号：US20050091233A1
公开(公告)日：2005-04-28
申请号：US10693184
申请日：2003-10-24
申请人： Craig Friske , Regina Liu , James Ruddy , James Teng , Julie Watts
发明人： Craig Friske , Regina Liu , James Ruddy , James Teng , Julie Watts
IPC分类号： G06F7/00 , G06F17/30
CPC分类号： G06F17/30297 , G06F11/1435 , G06F17/30477 , G06F2201/80 , Y10S707/99933 , Y10S707/99954
摘要： The present invention is related to a method and system for preserving an original table schema for a table in a database system that supports dynamic table schema changes. The method and system includes storing the original table schema for the table in a designated table prior to performing a schema change on the table. By storing the original table schema in the designated table, a backup copy of the table that includes rows which are not self-describing can be used for data recovery.
摘要翻译：本发明涉及一种用于维护支持动态表模式改变的数据库系统中的表的原始表模式的方法和系统。所述方法和系统包括在对表进行模式更改之前将表的原始表模式存储在指定的表中。通过将原始表模式存储在指定表中，可以使用包含不自描述行的表的备份副本进行数据恢复。

7. 发明授权

US4035572A Method of making chewing gum base 失效
标题翻译：制作口香糖基的方法
公开(公告)号：US4035572A
公开(公告)日：1977-07-12
申请号：US576170
申请日：1975-05-09
申请人： Marcella C. Stubits , James Teng
发明人： Marcella C. Stubits , James Teng
IPC分类号： A23G4/00 , A23G4/06 , A23G4/10 , C08B31/16
CPC分类号： A23G4/06 , A23G4/10 , C08B31/16
摘要： This application involves a process of making chewing gum base which is basically hydroxypropyl starch acetate. This process involves preparation of the hydroxypropyl starch acetate gum and separation and purification of the gum from an emulsion state.
摘要翻译：本申请涉及制造基本上是羟丙基淀粉乙酸酯的口香糖胶基的方法。该方法包括制备羟丙基淀粉乙酸酯胶，并从乳液状态分离和纯化胶。

8. 发明申请

US20100257152A1 ENHANCED IDENTIFICATION OF RELEVANT DATABASE INDICES 有权
标题翻译：增强相关数据库指标的识别
公开(公告)号：US20100257152A1
公开(公告)日：2010-10-07
申请号：US12418146
申请日：2009-04-03
申请人： Namik Hrle , Johannes Schuetzner , James Teng
发明人： Namik Hrle , Johannes Schuetzner , James Teng
IPC分类号： G06F7/00
CPC分类号： G06F17/30442 , G06F17/30336
摘要： According to one embodiment of the present invention, a method for identifying relevant database indexes is provided. According to one embodiment of the present invention, a method includes determining the importance of a particular database transaction and storing an index name related to the transaction along with an indicator of the importance. A database transaction is initiated and the importance indicator is received in an index advisor. The index advisor then makes an index recommendation based on the index importance.
摘要翻译：根据本发明的一个实施例，提供了一种用于识别相关数据库索引的方法。根据本发明的一个实施例，一种方法包括确定特定数据库事务的重要性并存储与事务相关的索引名称以及重要性的指标。启动数据库事务，并在索引顾问中接收重要性指标。然后，指数顾问根据指标的重要性提出指数推荐。

9. 发明授权

US07693875B2 Method for searching a data page for inserting a data record 失效
标题翻译：用于搜索数据页以插入数据记录的方法
公开(公告)号：US07693875B2
公开(公告)日：2010-04-06
申请号：US11620187
申请日：2007-01-05
申请人： Namik Hrle , Johannes Schuetzner , James Teng
发明人： Namik Hrle , Johannes Schuetzner , James Teng
IPC分类号： G06F12/00 , G06F17/30 , G06F9/26 , G06F9/34
CPC分类号： G06F17/30598 , G06F17/30492
摘要： A method of searching a data page in a table space of a database for inserting a data record to a first table, wherein the table space comprises space map pages and sets of data pages, wherein each space map page comprises information about the available storage space of one set of data pages, wherein each space map page and the corresponding set of data pages is further assigned to a table range for each table to which at least one data page in the set of data pages belongs to, wherein the database further comprises a clustering index for the first table in the database management system, wherein the database management system comprises a space usage information database, and wherein the space usage information database holds space usage information for each table range.
摘要翻译：一种在数据库的表空间中搜索用于将数据记录插入到第一表的数据页的方法，其中所述表空间包括空间图页和数据页组，其中每个空间图页包括关于可用存储空间的信息一组数据页面，其中每个空间地图页面和对应的数据页面集合进一步分配给数据页组中的至少一个数据页面所属的每个表的表范围，其中数据库还包括数据库管理系统中的第一表的聚类索引，其中所述数据库管理系统包括空间使用信息数据库，并且其中所述空间使用信息数据库保存每个表范围的空间使用信息。

10. 发明授权

US07317355B2 Over-current detection for a power field-effect transistor (FET) 有权
标题翻译：功率场效应晶体管（FET）的过电流检测
公开(公告)号：US07317355B2
公开(公告)日：2008-01-08
申请号：US11125968
申请日：2005-05-10
申请人： Shifeng Zhao , Cetin Kaya , James Teng , Claus Neesgaard , Lieyi Fang , Jeff Berwick
发明人： Shifeng Zhao , Cetin Kaya , James Teng , Claus Neesgaard , Lieyi Fang , Jeff Berwick
IPC分类号： H03F3/217
CPC分类号： H03K17/0822 , H03K17/162
摘要： A system and method is provided for detecting an over-current condition in a power field-effect transistor (FET). In one embodiment, an over-current detection circuit for detecting an over-current condition in a power FET comprises a current generator circuit operative to generate a reference current and a plurality of matched FETs operative to receive the reference current and provide a reference voltage, the matched FETs being matched to each other and to the power FET. The over-current detection circuit also comprises a comparator operative to measure a drain-to-source voltage of the power FET and to provide an output that indicates that the drain-to-source voltage of the power FET has exceeded the reference voltage.
摘要翻译：提供了用于检测功率场效应晶体管（FET）中的过电流状态的系统和方法。在一个实施例中，用于检测功率FET中的过电流状态的过电流检测电路包括用于产生参考电流的电流发生器电路和用于接收参考电流并提供参考电压的多个匹配FET，匹配的FET彼此匹配并连接到功率FET。过电流检测电路还包括比较器，用于测量功率FET的漏极 - 源极电压，并提供指示功率FET的漏极 - 源极电压已经超过参考电压的输出。

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