公开(公告)号：US20160188927A1

公开(公告)日：2016-06-30

申请号：US14256877

申请日：2014-04-18

申请人： Shahriar Rokhsaz ,  Brian David Young

发明人： Shahriar Rokhsaz ,  Brian David Young

IPC分类号： G06K7/10 ,  G06K19/07

CPC分类号： G06K7/10366 ,  G06K7/10316 ,  G06K7/10346 ,  G06K19/0716 ,  G06K19/0723 ,  H03J3/20 ,  H03J2200/10 ,  H04B5/0037

摘要： A method and apparatus for detecting RF field strength. A field strength reference generator develops a field strength reference current as a function of a field strength of a received RF signal; and a field strength quantizer develops a digital field-strength value indicative of the field strength reference current. In one embodiment, detected field strength is used to dynamically vary the impedance of a tank circuit whereby, over time, induced current is maximized. In another embodiment, the quantized field strength is used to sense changes to the environment to which the RFID tag is exposed. In yet another embodiment, dynamic variations of the quantized impedance of the tank circuit are used to sense changes in the environment. Several alternate antennas are specially adapted to facilitate sensing of environmental conditions using the RFID tag.

摘要翻译： 一种用于检测射频场强度的方法和装置。 场强参考发生器产生作为接收的RF信号的场强的函数的场强参考电流; 并且场强量化器产生指示场强参考电流的数字场强值。 在一个实施例中，使用检测的场强来动态地改变储能电路的阻抗，由此随着时间的推移，感应电流最大化。 在另一个实施例中，量化的场强用于检测对RFID标签所暴露的环境的改变。 在另一个实施例中，使用槽电路的量化阻抗的动态变化来感测环境中的变化。 多个替代天线特别适合于利用RFID标签来感测环境条件。

公开(公告)号：US20110025458A1

公开(公告)日：2011-02-03

申请号：US12845654

申请日：2010-07-28

申请人： Shahriar Rokhsaz ,  Edwin de Angel

发明人： Shahriar Rokhsaz ,  Edwin de Angel

IPC分类号： G05B19/00

CPC分类号： H04L63/0853 ,  G05B2219/31304 ,  G06Q20/382 ,  G06Q20/3827 ,  G06Q20/388 ,  H04L63/0492 ,  Y02P90/10

摘要： In an RFID system, a method and apparatus for linking an RFID tag to an associated object. The system includes a relatively simple tag, a reader, a linker, and a store. The reader interrogates the tag for an ID and selectively provides the ID to the linker. The linker, in turn, uses the ID to provide back to the reader an associated Uniform Resource Identifier (“URI”). The reader then forwards the URI to the store. In response, the store returns to the reader the object associated with the ID via the URI. The disclosed method and apparatus provide more efficient and secure tag authentication.

摘要翻译： 在RFID系统中，用于将RFID标签与相关对象相关联的方法和装置。 该系统包括相对简单的标签，读取器，链接器和商店。 读者询问ID的标签，并选择性地将ID提供给链接器。 链接器又使用ID向读者提供相关联的统一资源标识符（“URI”）。 然后，读者将URI转发到商店。 作为响应，商店通过URI向读写器返回与ID相关联的对象。 所公开的方法和装置提供更有效和安全的标签认证。

公开(公告)号：US06566950B1

公开(公告)日：2003-05-20

申请号：US10046214

申请日：2001-10-29

申请人： Shahriar Rokhsaz

发明人： Shahriar Rokhsaz

IPC分类号： H03F345

CPC分类号： H03F3/45659 ,  H03F3/45179 ,  H03F2203/45394 ,  H03F2203/45612 ,  H03F2203/45652

摘要： A high-speed, low distortion line driver that includes an amplifying circuit and a differential input amplifier. The differential input amplifier includes a 1st amplifying transistor, a 2nd amplifying transistor, a 1st controlled current source, and a 2nd controlled current source. The 1st amplifying transistor is coupled in series with the 1st controlled current source and the 2nd amplifying transistor is coupled in series with the 2nd controlled current source. The 1st and 2nd amplifying transistors are operably coupled to receive a differential input signal and provide a gained and level shifted representation of the differential input signal based on the controlled currents provided by the 1st and 2nd current sources. The amount of gain is based on the transconductance properties of the 1st and 2nd amplifying transistors and of the 1st and 2nd current sources.

公开(公告)号：US20170302247A9

公开(公告)日：2017-10-19

申请号：US14150392

申请日：2014-01-08

申请人： Shahriar Rokhsaz ,  Edwin de Angel

发明人： Shahriar Rokhsaz ,  Edwin de Angel

IPC分类号： H03H7/40 ,  H03J3/20 ,  H04B5/00

CPC分类号： H03H7/40 ,  H03J3/20 ,  H03J2200/10 ,  H04B5/0037

摘要： A method and apparatus for detecting RF field strength. A field strength reference generator develops a field strength reference current as a function of a field strength of a received RF signal; and a field strength quantizer develops a digital field-strength value indicative of the field strength reference current. In one embodiment, detected field strength is used to dynamically vary the impedance of a tank circuit whereby, over time, induced current is maximized.

公开(公告)号：US20160267769A1

公开(公告)日：2016-09-15

申请号：US14879088

申请日：2015-10-08

申请人： Shahriar Rokhsaz ,  Brian David Young ,  Marwan Hassoun

发明人： Shahriar Rokhsaz ,  Brian David Young ,  Marwan Hassoun

IPC分类号： G08B21/20 ,  E04D13/00 ,  G06K19/077 ,  H04B5/00 ,  G06K19/07

CPC分类号： H01Q9/0442 ,  A61B5/6808 ,  A61B5/7495 ,  A61F13/42 ,  A61F2013/424 ,  G01N27/048 ,  G01N27/225 ,  G06K19/0717 ,  G06K19/0775 ,  G08B21/20

摘要： Embodiments of the present invention provide a passive radio frequency identification (RFID) moisture sensor. This moisture sensor includes one or more antenna structures having a tail. The tail is operable to transport a disturbance such as, but not limited to fluid or moisture from a monitored location wherein the antenna has an impedance and varies with proximity to the disturbance. An integrated circuit couples to the antenna structure. This IC includes a power harvesting module operable to energize the integrated circuit, an impedance-matching engine coupled to the antenna, a memory module, and a wireless communication module. The impedance-matching engine may vary a reactive component to reduce a mismatch between the antenna impedance and the IC and produce an impedance value (sensor code) representative of the reactive component impedance. The memory module stores the impedance value (sensor code) until the wireless communication module communicates with an RFID reader and sends the impedance value/sensor code to the RFID reader. The RFID reader may then determine an environmental condition such as the presence of moisture or fluids at the tail of the RFID sensor. This sensor may deploy several antenna and/or tails sensitive to unique disturbances. These tails may be used to monitor different locations as well as different types of fluids. In one particular embodiment, the disturbance is a fluid or moisture within the gutter of a vehicle body.

摘要翻译： 本发明的实施例提供一种无源射频识别（RFID）水分传感器。 该湿度传感器包括具有尾部的一个或多个天线结构。 尾部可操作地传输干扰，例如但不限于来自监测位置的流体或湿气，其中天线具有阻抗并随着扰动的接近而变化。 集成电路耦合到天线结构。 该IC包括可操作以对集成电路通电的功率收集模块，耦合到天线的阻抗匹配引擎，存储器模块和无线通信模块。 阻抗匹配引擎可以改变电抗分量以减少天线阻抗和IC之间的失配，并产生代表无功分量阻抗的阻抗值（传感器代码）。 存储器模块存储阻抗值（传感器代码），直到无线通信模块与RFID读取器通信，并将阻抗值/传感器代码发送到RFID读取器。 然后，RFID读取器可以确定环境条件，例如在RFID传感器的尾部存在湿气或流体。 该传感器可以部署几个对独特干扰敏感的天线和/或尾部。 这些尾巴可用于监测不同位置以及不同类型的流体。 在一个具体实施例中，扰动是车体的沟槽内的流体或水分。

公开(公告)号：US08749319B2

公开(公告)日：2014-06-10

申请号：US13209420

申请日：2011-08-14

申请人： Shahriar Rokhsaz ,  Edwin de Angel

发明人： Shahriar Rokhsaz ,  Edwin de Angel

IPC分类号： H03H7/40

CPC分类号： H03H7/40 ,  H03J3/20 ,  H03J2200/10 ,  H04B5/0037

摘要： A method and apparatus for detecting RF field strength. A field strength reference generator develops a field strength reference current as a function of a field strength of a received RF signal; and a field strength quantizer develops a digital field-strength value indicative of the field strength reference current. In one embodiment, detected field strength is used to dynamically vary the impedance of a tank circuit whereby, over time, induced current is maximized.

摘要翻译： 一种用于检测射频场强度的方法和装置。 场强参考发生器产生作为接收的RF信号的场强的函数的场强参考电流; 并且场强量化器产生指示场强参考电流的数字场强值。 在一个实施例中，使用检测的场强来动态地改变储能电路的阻抗，由此随着时间的推移，感应电流最大化。

公开(公告)号：US20110300808A1

公开(公告)日：2011-12-08

申请号：US13209420

申请日：2011-08-14

申请人： Shahriar Rokhsaz ,  Edwin de Angel

发明人： Shahriar Rokhsaz ,  Edwin de Angel

IPC分类号： H04W24/00 ,  H03J3/20

CPC分类号： H03H7/40 ,  H03J3/20 ,  H03J2200/10 ,  H04B5/0037

摘要： A method and apparatus for detecting RF field strength. A field strength reference generator develops a field strength reference current as a function of a field strength of a received RF signal; and a field strength quantizer develops a digital field-strength value indicative of the field strength reference current. In one embodiment, detected field strength is used to dynamically vary the impedance of a tank circuit whereby, over time, induced current is maximized.

摘要翻译： 一种用于检测射频场强度的方法和装置。 场强参考发生器产生作为接收的RF信号的场强的函数的场强参考电流; 并且场强量化器产生指示场强参考电流的数字场强值。 在一个实施例中，使用检测的场强来动态地改变储能电路的阻抗，由此随着时间的推移，感应电流最大化。

公开(公告)号：US07254140B1

公开(公告)日：2007-08-07

申请号：US10047368

申请日：2002-01-14

申请人： Shahriar Rokhsaz ,  Jinghui Lu ,  Moises E. Robinson

发明人： Shahriar Rokhsaz ,  Jinghui Lu ,  Moises E. Robinson

IPC分类号： H04J3/16

CPC分类号： H04L67/2823 ,  H04L12/5692 ,  H04L67/28 ,  H04L67/2895

摘要： A method and apparatus for transceiving data in a micro-area network includes processing that begins by obtaining a data unit for transmission by a first data transceiving entity of a micro area network. The processing then continues when the first data transceiving entity formats the payload data using a first transmission format convention. The first data transceiving entity also formats the overhead data using a second transmission formatting convention to produce formatted overhead data. The formatting of the overhead data and/or payload data may include encoding and/or modulating the data. The processing continues when the first data transceiving entity transmits the formatted payload data and the formatted overhead data to at least one target entity within the micro-area network. The process continues when a target entity receives the formatted payload data and the formatted overhead data. The target entity then deformats the formatted payload data using the first transmission format convention to recapture the payload data and deformats the formatted overhead data using the second transmission format convention to retrieve the overhead data. The target entity then reconstructs the data unit from the retrieved payload data and the retrieved overhead data.

摘要翻译： 用于在微区域网络中收发数据的方法和装置包括通过获得数据单元开始的处理，以便由微区域网络的第一数据收发实体进行传输。 然后，当第一数据收发实体使用第一传输格式约定格式化有效载荷数据时，处理继续。 第一数据收发实体还使用第二传输格式化规则对开销数据进行格式化以产生格式化的开销数据。 开销数据和/或有效载荷数据的格式化可以包括编码和/或调制数据。 当第一数据收发实体将格式化的有效载荷数据和格式化的开销数据发送到微区域网络内的至少一个目标实体时，处理继续。 当目标实体接收格式化的有效载荷数据和格式化的开销数据时，该过程继续。 目标实体然后使用第一传输格式惯例对格式化的有效载荷数据进行格式化，以重新捕获有效载荷数据，并使用第二传输格式惯例对格式化的开销数据进行格式化以检索开销数据。 目标实体然后从检索到的有效载荷数据和检索的开销数据中重构数据单元。

公开(公告)号：US06956923B1

公开(公告)日：2005-10-18

申请号：US10421247

申请日：2003-04-22

申请人： Ahmed Younis ,  Shahriar Rokhsaz

发明人： Ahmed Younis ,  Shahriar Rokhsaz

IPC分类号： H03D13/00 ,  H03L7/087 ,  H03L7/089 ,  H03L7/091 ,  H03L7/10 ,  H04L7/033 ,  H03D3/24 ,  H03L7/06

CPC分类号： H03L7/10 ,  H03D13/003 ,  H03L7/087 ,  H03L7/0896 ,  H03L7/091 ,  H04L7/033

摘要： A high speed phase detector circuit operating at a clock speed equal to one-half an input data rate (i.e. a half-rate clock) provides phase information and transition information from incoming serial data. The high speed phase detector circuit samples the incoming serial data on both the rising edge and falling edge of the half-rate clock to provide equivalent full high speed data rate sampling. The high speed phase detector circuit generates a delay between the phase information and the transition information. The phase information is produced in a first bit period and the transition information is produced in a second bit period relative to the first bit period.

摘要翻译： 以等于输入数据速率的二分之一（即半速率时钟）的时钟速度工作的高速相位检测器电路从输入串行数据提供相位信息和转换信息。 高速相位检测器电路在半速率时钟的上升沿和下降沿都对输入的串行数据进行采样，以提供等效的全高速数据速率采样。 高速相位检测器电路在相位信息和转换信息之间产生延迟。 在第一比特周期中产生相位信息，并且以相对于第一比特周期的第二比特周期生成转换信息。

公开(公告)号：US5892800A

公开(公告)日：1999-04-06

申请号：US822338

申请日：1997-03-20

申请人： Mathew A. Rybicki ,  H. Spence Jackson ,  Shahriar Rokhsaz

发明人： Mathew A. Rybicki ,  H. Spence Jackson ,  Shahriar Rokhsaz

IPC分类号： H04L25/06 ,  H04L25/49 ,  H04L27/08

CPC分类号： H04L25/063 ,  H04L25/4902

摘要： A pre-amplifier circuit, which may be used in a variety of data recovery circuits to accurately recover data transmissions, includes an input regulatory circuit, a feedback circuit, and an amplifier. The input regulatory circuit regulates the magnitude of the data signal provided to the amplifier based on feedback signals from a feedback circuit. For low level data signals, the input regulatory circuit provides a full, or almost full, representation of the data signal to the amplifier for amplification. But, when the data signal levels increase, the input regulatory circuit attenuates, based on the feedback signals, the data signals more and more before providing them to the amplifier, such that the output of the amplifier stays within a certain range.

摘要翻译： 可以用于各种数据恢复电路以准确地恢复数据传输的前置放大器电路包括输入调节电路，反馈电路和放大器。 输入调节电路基于来自反馈电路的反馈信号来调节提供给放大器的数据信号的幅度。 对于低电平数据信号，输入调节电路向放大器提供数据信号的完整或几乎全部的表示，用于放大。 但是，当数据信号电平增加时，输入调节电路在将它们提供给放大器之前，越来越多地基于反馈信号衰减数据信号，使得放大器的输出保持在一定范围内。