-
公开(公告)号：US08193912B1
公开(公告)日：2012-06-05
申请号：US12403344
申请日：2009-03-12
申请人： Vadim Gutnik , Scott A. Cooper , John D. Hyde
发明人： Vadim Gutnik , Scott A. Cooper , John D. Hyde
IPC分类号： H04Q5/22
CPC分类号： G06K19/0701 , H04Q2213/13095
摘要： RFID tags are configured to adjust their clock frequency in order to meet predefined limits for reply frequencies to conserve tag power. A deviation of computed tag reply frequency from a reader commanded reply frequency is used to determine an adjustment to the tag clock frequency. The tag clock frequency may be adjusted during backscatter and restored once backscattering is completed.
摘要翻译： RFID标签被配置为调整其时钟频率，以便满足回复频率的预定限制以节省标签功率。 使用读取器命令回复频率的计算标签应答频率的偏差来确定对标签时钟频率的调整。 可以在反向散射期间调整标签时钟频率，并且一旦反向散射完成就恢复。
-
公开(公告)号：US07187237B1
公开(公告)日：2007-03-06
申请号：US10268116
申请日：2002-10-08
申请人： Christopher J. Diorio , Todd E. Humes , Ronald A. Oliver , William T. Colleran , Scott A. Cooper
发明人： Christopher J. Diorio , Todd E. Humes , Ronald A. Oliver , William T. Colleran , Scott A. Cooper
CPC分类号： H03F3/211 , H01L27/115 , H01L27/11521 , H01L27/11558 , H03F1/30 , H03F1/301 , H03F3/16 , H03F3/45744 , H03F2200/174 , H03F2203/45121 , H03F2203/45341 , H03F2203/45474 , H03F2203/45661 , H03G1/007
摘要： Analog-valued floating-gate transistors are used as trimmable circuit components for modifying and/or controlling the gain, phase, offset, frequency response, current consumption, and/or transfer function of signal pathways in parallel and/or serial processing circuits in radio frequency, analog, or mixed-signal integrated circuits.
-
3.发明授权公开(公告)号：US07025893B2
公开(公告)日：2006-04-11
申请号：US10639813
申请日：2003-08-12
CPC分类号： H05B3/265 , H01C17/075 , H05B3/262 , H05B2203/013 , H05B2203/017 , Y10T29/49083
摘要： A thin film heater includes at least two open regions formed along each of two spaced-apart edges of the thin film material, which edges are parallel to two spaced-apart edges of the underlying substrate. The open regions expose areas of underlying substrate. When electrical power is coupled to the two spaced-apart edges of the thin film material, uniformity of the heat generated across the thin film material is enhanced. The substrate may be planar or curved, and the open regions in the thin film material may be removed from deposited thin film material, or may be formed by preventing deposition of thin film material in such regions.
摘要翻译： 薄膜加热器包括沿着薄膜材料的两个间隔开的边缘中的每一个形成的至少两个开放区域，该边缘平行于下面的基底的两个间隔开的边缘。 开放区域露出下方基板的区域。 当电功率耦合到薄膜材料的两个间隔开的边缘时，跨越薄膜材料产生的热的均匀性增强。 衬底可以是平面的或弯曲的，并且薄膜材料中的开放区域可以从沉积的薄膜材料中去除，或者可以通过防止薄膜材料在这些区域中的沉积来形成。
-
4.发明授权Efficient implementation of a decision directed phase locked loop (DD-PLL) for use with short block code in digital communication systems 有权在数字通信系统中有效实施用于短块码的决策定向锁相环（DD-PLL）公开(公告)号：US06956924B2
公开(公告)日：2005-10-18
申请号：US09929464
申请日：2001-08-14
CPC分类号： H04L27/22 , H04L2027/003 , H04L2027/0057
摘要： A decision directed phase locked loop (DD-PLL) is efficiently implemented in a communication receiver. The phase locked loop includes an enhanced block decoder inside a phase detector which takes in the baseband complex samples and the current channel phase estimate (or the tracked phase) and generates a feedback phase error term. A loop filter filters the phase error terms and a phase accumulator updates the tracked phase estimate on each iteration of the loop.
摘要翻译： 在通信接收机中有效地实现了决策定向锁相环（DD-PLL）。 锁相环包括相位检测器内的增强型块解码器，其接收基带复合采样和当前信道相位估计（或跟踪相位）并产生反馈相位误差项。 环路滤波器对相位误差项进行滤波，相位累加器在循环的每次迭代中更新跟踪的相位估计。
-
公开(公告)号：US4310584A
公开(公告)日：1982-01-12
申请号：US107351
申请日：1979-12-26
CPC分类号： G02B5/287 , B32B7/02 , Y10T428/24942 , Y10T428/2495 , Y10T428/31786 , Y10T428/31797
摘要： Improvements in multilayer light-reflecting film are effected by the use of thermoplastic polyester as the high refractive index component of a system in which two or more resinous materials form a plurality of layers.
摘要翻译： 通过使用热塑性聚酯作为其中两种或更多种树脂材料形成多层的系统的高折射率组分来实现多层光反射膜的改进。
-
公开(公告)号：US4162343A
公开(公告)日：1979-07-24
申请号：US863800
申请日：1977-12-23
申请人： Forrest S. Wilcox , Jules Pinsky , Scott A. Cooper
发明人： Forrest S. Wilcox , Jules Pinsky , Scott A. Cooper
CPC分类号： G02B5/0841 , Y10S428/913 , Y10T428/24942 , Y10T428/2495 , Y10T428/3192 , Y10T428/31928 , Y10T428/31938
摘要： A multilayer coextruded light-reflecting film is improved by utilizing a mixture of a polyolefin and ethylenevinyl acetate as one of the diverse resinous material which form the plurality of layers.
摘要翻译： 通过利用聚烯烃和乙烯 - 乙酸乙烯酯的混合物作为形成多个层的不同树脂材料之一，改进了多层共挤出的光反射膜。
-
公开(公告)号：US08941469B1
公开(公告)日：2015-01-27
申请号：US13155057
申请日：2011-06-07
CPC分类号： G06Q30/0185 , H04L9/3247 , H04L9/3271 , H04L2209/805 , H04W4/80
摘要： An authentication method includes RFID readers authenticating RFID tags using public-key cryptography. A tag manufacturer or other legitimate authority produces a tag private-public key pair and stores the tag private key in externally unreadable tag memory and the tag public key in externally readable tag memory. The authority produces a master private-public key pair and distributes the master public key to readers in the field. The authority generates a tag-specific electronic signature based on at least the tag public key and the master private key and stores this signature in externally readable tag memory. A reader authenticates the tag by retrieving the tag public key and electronic signature from the tag, verifying the authenticity of the tag public key using the master public key and the electronic signature, challenging the tag, receiving a response from the tag to the challenge, and verifying the response using the tag public key.
摘要翻译： 认证方法包括使用公开密钥密码技术的RFID读取器来认证RFID标签。 标签制造商或其他合法权限产生标签私钥对，并将标签私钥存储在外部不可读标签存储器中，并将标签公钥存储在外部可读标签存储器中。 该权限生成一个主私钥公钥，并将主公钥分发给该领域的读者。 该权限至少基于标签公钥和主私钥生成特定于标签的电子签名，并将该签名存储在外部可读标签存储器中。 读者通过从标签检索标签公钥和电子签名来认证标签，使用主公钥和电子签名验证标签公钥的真实性，挑战标签，从标签接收到对挑战的响应， 并使用标签公钥验证响应。
-
公开(公告)号：US08154385B2
公开(公告)日：2012-04-10
申请号：US11472179
申请日：2006-06-20
IPC分类号： H04Q5/22
CPC分类号： G06K17/0022 , G06K7/10108 , G06K2017/0045
摘要： Radio frequency identification (RFID) tags selected for inventorying using combination of preselect and/or post select criteria. The selection commands can be for selecting according to a tag memory content, by invoking the mask address or by comparing other tag characteristics. Selection criteria can be determined locally at a modem block of a reader or provided to the modem block by higher layers of the reader. Tags meeting the selection criteria are reported to the higher layers for further actions. Some tags may be held while waiting for instructions from the higher layer block(s).
摘要翻译： 使用预选和/或后选择标准的组合选择进行库存的射频识别（RFID）标签。 选择命令可以根据标签存储器内容，通过调用掩码地址或通过比较其他标签特征来进行选择。 选择标准可以在读取器的调制解调器块本地确定，或者由阅读器的较高层提供给调制解调器块。 满足选择标准的标签被报告给较高层以进行进一步的操作。 在等待来自较高层块的指令的同时可以保持一些标签。
-
9.发明授权RFID readers system and methods for early hopping out of a frequency channel in the presence of RF interference 有权RFID读写器系统和方法，用于在存在RF干扰的情况下从频道中跳出公开(公告)号：US07592897B2
公开(公告)日：2009-09-22
申请号：US11849737
申请日：2007-09-04
CPC分类号： G06K7/0008 , G06K7/10069 , G06K7/10198
摘要： RFID readers, systems, and methods are provided for overcoming the effects of RF interference. While a system is communicating in a channel, RF interference is monitored. If it is low, then hopping to another channel is performed according to an ordinary decision. But if interference is high, then hopping out to another channel can be earlier than would be dictated by the ordinary decision under the same circumstances. The earlier hopping out can result in diminishing communication in channels with a lot of RF interference.
摘要翻译： 提供RFID读取器，系统和方法来克服RF干扰的影响。 当系统正在通道中进行通信时，会监视射频干扰。 如果为低，则根据普通决定执行到另一信道的跳频。 但是，如果干扰较大，那么跳出另一个频道可能会比同样情况下的普通决策所规定的更早。 较早的跳出可能导致频道中的通信频繁减少，具有大量的射频干扰。
-
10.发明授权公开(公告)号：US06954159B1
公开(公告)日：2005-10-11
申请号：US10612829
申请日：2003-07-01
摘要： A low-distortion band-pass delta-sigma analog-to-digital converter (ADC), including an odd-phase sample and hold circuit coupled to a even-phase resonator, improves tolerance to mismatches between analog circuit components. The low-distortion ADC includes a feed-forward signal path that reduces, or eliminates, the input signal beyond the first summation point. In this way, the dynamic range and matching accuracy required of the resonator is reduced. An odd-phase sample and hold circuit shifts S/H spurious signals out-of-band. A two-phase resonator reduces in-band noise degradation caused by any mismatches between the resonator components.
摘要翻译： 低失真带通delta-sigma模数转换器（ADC），包括耦合到偶相谐振器的奇数相位采样和保持电路，提高了模拟电路组件之间的失配容限。 低失真ADC包括前馈信号路径，其减少或消除超出第一求和点的输入信号。 以这种方式，减小了谐振器所需的动态范围和匹配精度。 奇数相位采样和保持电路将S / H杂散信号移出带外。 两相谐振器减少由谐振器部件之间的任何失配引起的带内噪声劣化。
-
-
-
-
-
-
-
-
-
搜索结果
38 条记录 (耗时 0.02 秒)
