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公开(公告)号：USD632186S1
公开(公告)日：2011-02-08
申请号：US29358927
申请日：2010-04-01
申请人： Jeffrey H. Fischer
设计人： Jeffrey H. Fischer
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公开(公告)号：US07692532B2
公开(公告)日：2010-04-06
申请号：US11194145
申请日：2005-07-29
CPC分类号： G06K17/0029 , G01S5/0252 , G01S5/06 , G06K7/0008 , G06K7/10356 , G06K2017/0045 , G06K2017/0048 , G06K2017/0051
摘要： A system and method for monitoring and characterizing various sources of RF interference within an RFID environment, and for adjusting the operational characteristics of an array of RFID readers within the system based on these interference characterizations. The system examines the received transmissions from readers in the network by controlling a calibration cycle or while they are operating as interrogators to determine interference parameters, and to verify the operation of the readers in the array. The system also examines outside sources of interference, and signal dependent interference. The interference characterization can also be estimated from a combination of calculations and co-monitoring.
摘要翻译： 一种用于监视和表征RFID环境内的各种RF干扰源的系统和方法，并且用于基于这些干扰特征来调整系统内的RFID读取器阵列的操作特性。 该系统通过控制校准周期或当它们作为询问器操作以确定干扰参数并且验证阵列中的读取器的操作来检查来自网络中的读取器的接收的传输。 该系统还检查外部干扰源和信号相关干扰。 干涉特征也可以通过计算和共同监测的组合来估计。
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3.发明授权公开(公告)号：US06658610B1
公开(公告)日：2003-12-02
申请号：US09669117
申请日：2000-09-25
IPC分类号： G11C2900
CPC分类号： G01R31/3187 , G01R31/3193 , G11C29/26 , G11C2029/1802
摘要： The present invention provides a method and apparatus that improves Built-In-Self-Test (BIST) flexibility without requiring the complexity of a compilable BIST circuit. Additionally, the present invention provides the ability to use a single BIST to test multiple memory arrays of different sizes. The preferred embodiment of the present invention provides a compilable address magnitude comparator to facilitate BIST testing of different size memory arrays without requiring customization of the BIST controller. The preferred embodiment compilable address magnitude comparator is compiled within the compilable memory arrays of the ASIC to allow a single BIST controller to test multiple sizes of memory arrays without requiring that the BIST controller itself be compilable. In the preferred embodiment, the compilable magnitude address comparator overrides the self-test signal from the BIST when the BIST attempts to test addresses that do not exist in the memory. As such, the BIST is prevented from writing to addresses that do not exist, and does not receive error signals from those addresses. Thus, the BIST controller is able to test memory arrays without regard for their particular size. Furthermore, a single BIST controller can then be used to test multiple memory arrays of different sizes in the ASIC, again reducing device complexity.
摘要翻译： 本发明提供了一种改进内置自测（BIST）灵活性的方法和装置，而不需要可编译BIST电路的复杂性。 此外，本发明提供了使用单个BIST来测试不同大小的多个存储器阵列的能力。 本发明的优选实施例提供可编译的地址幅度比较器，以便于不需要定制BIST控制器的不同大小的存储器阵列的BIST测试。 优选实施例可编译地址幅度比较器被编译在ASIC的可编译存储器阵列内，以允许单个BIST控制器测试存储器阵列的多个大小，而不需要BIST控制器本身可编译。 在优选实施例中，当BIST尝试测试存储器中不存在的地址时，可编译幅度地址比较器覆盖来自BIST的自检信号。 因此，BIST被阻止写入不存在的地址，并且不从这些地址接收到错误信号。 因此，BIST控制器能够测试存储器阵列，而不考虑其特定大小。 此外，可以使用单个BIST控制器来测试ASIC中不同大小的多个存储器阵列，从而降低器件的复杂性。
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公开(公告)号：US20120039653A1
公开(公告)日：2012-02-16
申请号：US13208489
申请日：2011-08-12
申请人： Jeffrey H. Fischer
发明人： Jeffrey H. Fischer
CPC分类号： B43K23/008 , A45D34/00 , B43K8/003 , B43M11/06
摘要： An applicator includes a hollow body having a central longitudinal axis to hold a colored ink, a shoulder portion, a central recessed portion, and a base portion. The shoulder portion is located above and merges with the central recessed portion at an upper end thereof and includes a top wall having an opening. The base portion is located below and merges with the central recessed portion at a lower end thereof and includes a bottom wall. The central recessed portion has a smooth continuous sidewall formed as a triangle with three sides of substantially identical dimensions. The central recessed portion merges with the shoulder portion and the base portion at upper and lower flared surfaces, respectively.
摘要翻译： 涂抹器包括具有中心纵向轴线以保持着色油墨的中空体，肩部，中心凹部和基部。 肩部位于上方并与其中心凹部合并，并且包括具有开口的顶壁。 基部位于其下端并与其中央凹部合并并且包括底壁。 中央凹部具有形成为三角形的平滑连续侧壁，三边具有基本相同的尺寸。 中央凹部分别与上表面和下喇叭形表面的肩部和基部分合并。
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公开(公告)号：US07667572B2
公开(公告)日：2010-02-23
申请号：US11194128
申请日：2005-07-29
申请人： David J. Husak , Robert A. Stephenson , Michael Grady , Scott Barvick , Pattabhiraman Krishna , Chilton L. Cabot , Jeffrey H. Fischer
发明人： David J. Husak , Robert A. Stephenson , Michael Grady , Scott Barvick , Pattabhiraman Krishna , Chilton L. Cabot , Jeffrey H. Fischer
CPC分类号： G06K17/0029 , G01S5/0252 , G01S5/06 , G06K7/0008 , G06K7/10356 , G06K2017/0045 , G06K2017/0048 , G06K2017/0051
摘要： An architecture of an RFID system that facilitates the accessing of RFID tag data within an RFID environment. The architecture includes a plurality of RFID readers, each reader being operative to transmit a first RF signal for scanning at least one RFID tag disposed within an RF coverage region associated with the reader, and to receive at least one second RF signal including tag data in response to the scanning of the tag. The architecture further includes at least one host computer operative to execute at least one client application, and at least one controller/processor communicably coupled to the plurality of readers and the at least one host computer. The controller/processor is operative to control operation of the plurality of readers, to process the tag data received by the plurality of readers, and to provide the processed tag data to the at least one host computer for use by the at least one client application executing thereon.
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公开(公告)号：US06473449B1
公开(公告)日：2002-10-29
申请号：US09487395
申请日：2000-01-18
IPC分类号： H04L2730
CPC分类号： H04B1/711 , H04B1/707 , H04B2201/709709 , H04J13/0048 , H04J13/102 , H04W84/12
摘要： An apparatus and method for communicating data between at least two data devices, suitable for use as a wireless local-area network, that provides robust data communication via a radio communications channel corrupted by multipath interference, particularly at high data rates. A preferred embodiment of the invention represents data as a sequence of Walsh-function waveforms encoded by pseudo-noise direct-sequence spread-spectrum modulation. Walsh-function-encoding of the data provides a long symbol duration, thereby allowing the spread-spectrum modulation to provide processing gain sufficient to substantially overcome multipath interference, while providing a high data rate. In another preferred embodiment, Walsh-function modulation is supplemented with various forms of phase modulation, such as coherent PSK for bi-orthogonal signalling, and DPSK between orthogonal symbols for noncoherent bi-orthogonal signalling, thereby further increasing data rate without reducing processing gain. In another preferred embodiment, Walsh-function modulation is supplemented with spectral shaping to allow increased bandwidth occupancy, thereby further increasing the processing gain without sacrificing data rate.
摘要翻译： 一种用于在至少两个适合用作无线局域网的数据设备之间传送数据的装置和方法，其经由由多路径干扰（特别是在高数据速率）损坏的无线电通信信道提供鲁棒的数据通信。 本发明的优选实施例将数据表示为由伪噪声直接序列扩频调制编码的沃尔什函数波形序列。 数据的沃尔什函数编码提供长的符号持续时间，从而允许扩展频谱调制提供足以实质上克服多径干扰的处理增益，同时提供高数据速率。 在另一个优选实施例中，沃尔什函数调制被补充有各种形式的相位调制，例如用于双正交信令的相干PSK，以及用于非相干双正交信令的正交符号之间的DPSK，从而进一步增加数据速率而不降低处理增益。 在另一个优选实施例中，沃尔什函数调制用频谱整形补充以允许增加的带宽占用，从而进一步增加处理增益而不牺牲数据速率。
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公开(公告)号：US5412620A
公开(公告)日：1995-05-02
申请号：US130668
申请日：1993-10-01
IPC分类号： H04B11/00
CPC分类号： H04B11/00
摘要： A hydroacoustic communication system employs spread spectrum to mitigate multipath interference caused by acoustic reflections off underwater surfaces and other large boundaries or acoustic discontinuities. The system is particularly beneficial for mitigating errors due to surface reflections, and for mitigating interference due to unwanted signals having a delay ranging from tens of microseconds to hundreds of milliseconds.
摘要翻译： 水声通信系统采用扩展频谱来减轻由水下表面和其他大边界或声学不连续性引起的声反射引起的多径干扰。 该系统特别有利于减轻由于表面反射引起的误差，并且用于减轻由于具有几十微秒到几百毫秒的延迟的不想要的信号引起的干扰。
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公开(公告)号：US07667575B2
公开(公告)日：2010-02-23
申请号：US11194144
申请日：2005-07-29
CPC分类号： G06K17/0029 , G01S5/0252 , G01S5/06 , G06K7/0008 , G06K7/10356 , G06K2017/0045 , G06K2017/0048 , G06K2017/0051
摘要： A system and method of determining locations of one or more RFID tags within an RFID environment. The system includes a plurality of RFID readers, each operative to transmit and receive RF signals for scanning a tag disposed within an RF coverage region associated with the reader, and for receiving tag data in response to the scanning of the tag. A plurality of sub-locations is determined within the environment, each corresponding to at least a portion of at least one of a plurality of RF coverage regions associated with the readers. The sub-locations are mapped to a plurality of predefined locations within the environment. A reader scans a tag, and receives tag scan data from the tag in response to the scanning of the tag. The tag scan data includes a tag identifier associated with the scanned tag. The tag scan data is mapped to the sub-locations based on the RF coverage region associated with the reader. The location of the scanned tag is then determined with reference to the predefined locations within the environment, based on the tag identifier included in the tag scan data, the mapping of the tag scan data to the sub-locations, and the mapping of the sub-locations to the predefined locations.
摘要翻译： 一种确定RFID环境中的一个或多个RFID标签的位置的系统和方法。 该系统包括多个RFID读取器，每个RFID读取器用于发送和接收RF信号，用于扫描布置在与读取器相关联的RF覆盖区域内的标签，以及响应于标签的扫描而接收标签数据。 在环境中确定多个子位置，每个子位置对应于与读取器相关联的多个RF覆盖区域中的至少一个的至少一部分。 子位置被映射到环境中的多个预定位置。 读取器扫描标签，并且响应于标签的扫描从标签接收标签扫描数据。 标签扫描数据包括与扫描的标签相关联的标签标识符。 基于与读取器相关联的RF覆盖区域，标签扫描数据被映射到子位置。 然后，基于包括在标签扫描数据中的标签标识符，标签扫描数据到子位置的映射以及子区域的映射，参考环境中的预定义位置来确定扫描标签的位置 - 定位到预定义的位置。
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公开(公告)号：US06961276B2
公开(公告)日：2005-11-01
申请号：US10664789
申请日：2003-09-17
申请人： Francois Ibrahim Atallah , James Norris Dieffenderfer , Jeffrey H. Fischer , Michael Thomas Fragano , Daniel Stephen Geise , Jeffery Howard Oppold , Michael R. Ouellette , Neelesh Govindaraya Pai , William Robert Reohr , Joel Abraham Silberman , Thomas Philip Speier
发明人： Francois Ibrahim Atallah , James Norris Dieffenderfer , Jeffrey H. Fischer , Michael Thomas Fragano , Daniel Stephen Geise , Jeffery Howard Oppold , Michael R. Ouellette , Neelesh Govindaraya Pai , William Robert Reohr , Joel Abraham Silberman , Thomas Philip Speier
CPC分类号： G11C7/22 , G11C7/06 , G11C7/1045
摘要： A random access memory circuit comprises a plurality of memory cells and at least one decoder coupled to the memory cells, the decoder being configurable for receiving an input address and for accessing one or more of the memory cells in response thereto. The random access memory circuit further comprises a plurality of sense amplifiers operatively coupled to the memory cells, the sense amplifiers being configurable for determining a logical state of one or more of the memory cells. A controller coupled to at least a portion of the sense amplifiers is configurable for selectively operating in at least one of a first mode and a second mode. In the first mode of operation, the controller enables one of the sense amplifiers corresponding to the input address and disables the sense amplifiers not corresponding to the input address. In the second mode of operation, the controller enables substantially all of the sense amplifiers. The memory circuit advantageously provides an adaptable latency by controlling the mode of operation of the circuit.
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公开(公告)号：US6075812A
公开(公告)日：2000-06-13
申请号：US48651
申请日：1998-03-26
IPC分类号： H03M7/30 , H04B1/707 , H04B1/711 , H04B14/04 , H04J11/00 , H04J13/00 , H04J13/10 , H04L1/00 , H04L12/28 , H04L27/18 , H04L27/20 , H04B14/707
CPC分类号： H04B1/711 , H04B1/707 , H04J13/0048 , H04J13/102 , H04B2201/709709 , H04W84/12
摘要： An apparatus and method for communicating data between at least two data devices, suitable for use as a wireless local-area network, that provides robust data communication via a radio communications channel corrupted by multipath interference, particularly at high data rates. A preferred embodiment of the invention represents data as a sequence of Walsh-function waveforms encoded by pseudo-noise direct-sequence spread-spectrum modulation. Walsh-function-encoding of the data provides a long symbol duration, thereby allowing the spread-spectrum modulation to provide processing gain sufficient to substantially overcome multipath interference, while providing a high data rate. In another preferred embodiment, Walsh-function modulation is supplemented with various forms of phase modulation, such as coherent PSK for bi-orthogonal signalling, and DPSK between orthogonal symbols for noncoherent bi-orthogonal signalling, thereby further increasing data rate without reducing processing gain. In another preferred embodiment, Walsh-function modulation is supplemented with spectral shaping to allow increased bandwidth occupancy, thereby further increasing the processing gain without sacrificing data rate.
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