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1.发明授权Method, system, and apparatus for remote data calibration of a RFID tag population 有权用于RFID标签群的远程数据校准的方法，系统和装置公开(公告)号：US06956509B2
公开(公告)日：2005-10-18
申请号：US10926269
申请日：2004-08-26
IPC分类号： G06K17/00 , G06K7/00 , G06K19/07 , G11C5/14 , H04B1/59 , H04B5/02 , H04L7/033 , H03M5/08 , G08B13/14 , H04Q5/22
CPC分类号： G06K19/07749 , G06K7/0008 , G06K7/10039 , G06K7/10069 , G06K7/10108 , G06K7/10356 , G06K17/00 , G06K19/0713 , G06K19/0723 , G06K19/07767 , G08B13/2485 , G11C5/142 , H04L7/0331
摘要： A method, system, and apparatus for remotely calibrating data symbols received by a radio frequency identification (RFID) tag population are described. Tags are interrogated by a reader, which may be located in a network of readers. The reader transmits data symbols to the tags. Tags respond to the interrogations with symbols that each represent one or more bits of data. To calibrate the tags, the reader transmits a plurality of pulses of different lengths to the tag population. The tags receive the plurality of pulses. A characteristic of each pulse, such as a pulse length, is stored by the tags. The stored pulse lengths are used to define different data symbols that are subsequently received by the tags from the reader.
摘要翻译： 描述用于远程校准由射频识别（RFID）标签群体接收的数据符号的方法，系统和装置。 标签被读者询问，读者可能位于读者网络中。 读卡器将数据符号发送到标签。 标签响应具有每个表示一个或多个数据位的符号的询问。 为了校准标签，读取器将多个不同长度的脉冲发送到标签群。 标签接收多个脉冲。 每个脉冲的特征，如脉冲长度，由标签存储。 存储的脉冲长度用于定义随后由读取器接收的标签的不同数据符号。
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公开(公告)号：US07965189B2
公开(公告)日：2011-06-21
申请号：US11785215
申请日：2007-04-16
IPC分类号： G08B13/14
CPC分类号： G06K19/07749 , G06K7/0008 , G06K7/10039 , G06K7/10069 , G06K7/10108 , G06K7/10356 , G06K17/00 , G06K19/0713 , G06K19/0723 , G06K19/07767 , G08B13/2485 , G11C5/142 , H04L7/0331
摘要： A radio frequency identification (RFID) architecture is described. RFID tags are interrogated by a reader, which may be located in a network of readers. The reader transmits symbols to the tags. Tags respond to the interrogations with symbols that each represent one or more bits of data. An RFID tag includes an antenna pad, a receiver, a state machine, and a modulator. The receiver is coupled to the antenna pad. The receiver receives a symbol from the antenna pad and outputs a received signal. The state machine is configured to determine a response symbol from the received signal and an operating state of the tag. The modulator is coupled to the antenna pad. The modulator is configured to backscatter modulate the received symbol with the response symbol. The modulator is configured to output the backscatter modulated symbol to the antenna pad.
摘要翻译： 描述射频识别（RFID）架构。 RFID标签被读取器询问，读取器可以位于读取器网络中。 读卡器将符号发送到标签。 标签响应具有每个表示一个或多个数据位的符号的询问。 RFID标签包括天线垫，接收器，状态机和调制器。 接收器耦合到天线焊盘。 接收机从天线焊盘接收符号并输出接收信号。 状态机被配置为从接收到的信号和标签的操作状态确定响应符号。 调制器耦合到天线垫。 调制器被配置为使用响应符号对所接收的符号进行后向散射调制。 调制器被配置为将后向散射调制符号输出到天线焊盘。
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公开(公告)号：US07145482B2
公开(公告)日：2006-12-05
申请号：US11222070
申请日：2005-09-09
CPC分类号： G06K19/07749 , G06K7/0008 , G06K7/10039 , G06K7/10069 , G06K7/10108 , G06K7/10356 , G06K17/00 , G06K19/0713 , G06K19/0723 , G06K19/07767 , G08B13/2485 , G11C5/142 , H04L7/0331
摘要： A method, system, and apparatus for remotely calibrating data symbols received by a radio frequency identification (RFID) tag population are described. Tags are interrogated by a reader, which may be located in a network of readers. The reader transmits data symbols to the tags. Tags respond to the interrogations with symbols that each represent one or more bits of data. To calibrate the tags, the reader transmits a plurality of pulses of different lengths to the tag population. The tags receive the plurality of pulses. A characteristic of each pulse, such as a pulse length, is stored by the tags. The stored pulse lengths are used to define different data symbols that are subsequently received by the tags from the reader.
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公开(公告)号：US07928843B2
公开(公告)日：2011-04-19
申请号：US11272135
申请日：2005-11-14
CPC分类号： G06K19/07749 , G06K7/0008 , G06K7/10039 , G06K7/10069 , G06K7/10108 , G06K7/10356 , G06K17/00 , G06K19/0713 , G06K19/0723 , G06K19/07767 , G08B13/2485 , G11C5/142 , H04L7/0331
摘要： A method, system, and apparatus for interrogating a radio frequency identification (RFID) tag population are described. Tags are interrogated by a reader. The reader and tags engage in communication according to communications algorithms, where data symbols are exchanged between the reader and tags. Furthermore, a reader implicitly controls the operating state of every tag in the tag population by transmitting a single data symbol. Bit patterns may be collected from the tags by the reader, using a variety of interrogation techniques. In a general interrogation, the reader exchanges symbols with the tag population to interrogate the entire tag population. In a specific interrogation, a reader exchanges symbols with the tag population to target a particular tag identification number. Tags may also be placed in a superposition state by the reader, where they respond whenever a received data symbol matches the next bit of their identification number.
摘要翻译： 描述了用于询问射频识别（RFID）标签群的方法，系统和装置。 标签被读者询问。 读取器和标签根据通信算法进行通信，其中在读取器和标签之间交换数据符号。 此外，读取器通过传送单个数据符号来隐含地控制标签群中每个标签的操作状态。 读取器可以使用各种询问技术从标签中收集位模式。 在一般询问中，读者与标签群交换符号以询问整个标签群。 在特定的询问中，读者与标签群交换符号以针对特定的标签标识号。 标签也可以由读取器置于叠加状态，其中当接收的数据符号与其识别号码的下一位匹配时，它们响应。
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公开(公告)号：US07564358B2
公开(公告)日：2009-07-21
申请号：US11434894
申请日：2006-05-17
IPC分类号： G08B13/14
CPC分类号： G06K19/07749 , G06K7/0008 , G06K7/10039 , G06K7/10069 , G06K7/10108 , G06K7/10356 , G06K17/00 , G06K19/0713 , G06K19/0723 , G06K19/07767 , G08B13/2485 , G11C5/142 , H04L7/0331
摘要： An identification (ID) tag includes a substrate having an input capable of receiving a high frequency signal. A first charge pump is coupled to the input and is configured to convert the high frequency signal to a substantially direct current (DC) voltage. A state machine is disposed on the substrate and is responsive to a data recovered by the second charge pump, where the state machine is capable of generating the control signal for the back scatter switch in response to the data. The DC voltage from the first charge pump is capable of providing a voltage supply for at least one of the data recovery circuit, the back scatter switch, and the state machine. The data recovery circuit includes a second charge pump that is capable of operating on the high frequency signal simultaneously with the first charge pump. In other words, the first charge pump can generate the supply voltage for the ID tag from the high frequency signal, while the second charge pump simultaneously retrieves the data from the high frequency signal.
摘要翻译： 识别（ID）标签包括具有能够接收高频信号的输入的基板。 第一电荷泵耦合到输入端并被配置为将高频信号转换成基本上直流（DC）的电压。 状态机被布置在基板上并且响应于由第二电荷泵恢复的数据，其中状态机能够响应于数据而产生用于背散射开关的控制信号。 来自第一电荷泵的DC电压能够为数据恢复电路，后向散射开关和状态机中的至少一个提供电压源。 数据恢复电路包括能够与第一电荷泵同时对高频信号进行操作的第二电荷泵。 换句话说，第一电荷泵可以从高频信号产生ID标签的电源电压，而第二电荷泵同时从高频信号中检索数据。
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公开(公告)号：US07102523B2
公开(公告)日：2006-09-05
申请号：US11099473
申请日：2005-04-06
IPC分类号： G08B13/14
CPC分类号： G06K19/07749 , G06K7/0008 , G06K7/10039 , G06K7/10069 , G06K7/10108 , G06K7/10356 , G06K17/00 , G06K19/0713 , G06K19/0723 , G06K19/07767 , G08B13/2485 , G11C5/142 , H04L7/0331
摘要： A radio frequency identification (RFID) architecture is described. RFID tags are interrogated by a reader, which may be located in a network of readers. The reader transmits symbols to the tags. Tags respond to the interrogations with symbols that each represent one or more bits of data. An RFID tag includes an antenna pad, a receiver, a state machine, and a modulator. The receiver is coupled to the antenna pad. The receiver receives a symbol from the antenna pad and outputs a received signal. The state machine is configured to determine a response symbol from the received signal and an operating state of the tag. The modulator is coupled to the antenna pad. The modulator is configured to backscatter modulate the received symbol with the response symbol. The modulator is configured to output the backscatter modulated symbol to the antenna pad.
摘要翻译： 描述射频识别（RFID）架构。 RFID标签被读取器询问，读取器可以位于读取器网络中。 读卡器将符号发送到标签。 标签响应具有每个表示一个或多个数据位的符号的询问。 RFID标签包括天线垫，接收器，状态机和调制器。 接收器耦合到天线焊盘。 接收机从天线焊盘接收符号并输出接收信号。 状态机被配置为从接收到的信号和标签的操作状态确定响应符号。 调制器耦合到天线垫。 调制器被配置为使用响应符号对所接收的符号进行后向散射调制。 调制器被配置为将后向散射调制符号输出到天线焊盘。
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7.发明授权Method, system, and apparatus for communicating with a RFID tag population 有权用于与RFID标签群进行通信的方法，系统和装置公开(公告)号：US07057511B2
公开(公告)日：2006-06-06
申请号：US10073000
申请日：2002-02-12
IPC分类号： G08B13/14
CPC分类号： G06K19/07749 , G06K7/0008 , G06K7/10039 , G06K7/10069 , G06K7/10108 , G06K7/10356 , G06K17/00 , G06K19/0713 , G06K19/0723 , G06K19/07767 , G08B13/2485 , G11C5/142 , H04L7/0331
摘要： A method, system, and apparatus for communicating with a radio frequency identification (RFID) tag population that includes one or more tags are described. The tags are interrogated by a reader which may be located in a network of readers. The reader interrogates the tags by transmitting data symbols to the tags. Tags respond to the reader with backscatter symbols. Bit patterns, such as identification numbers stored in the tags, are collected from the plurality of tags without collisions. Collisions are avoided because the backscatter symbols transmitted by the tags use different characteristics to represent different data bits. For example, a first backscatter symbol frequency is used by the tag to represent a “0” bit, and a second backscatter symbol frequency is used by the tag to represent a “1” bit.
摘要翻译： 描述了与包括一个或多个标签的射频识别（RFID）标签群进行通信的方法，系统和装置。 这些标签由可能位于读取器网络中的读取器询问。 读者通过向标签发送数据符号来询问标签。 标签用反向散射符号回应读者。 诸如标签中存储的识别号码的位模式从多个标签中收集而不发生冲突。 避免了碰撞，因为标签发送的反向散射符号使用不同的特性来表示不同的数据位。 例如，标签使用第一反向散射符号频率来表示“0”比特，并且标签使用第二反向散射符号频率来表示“1”比特。
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公开(公告)号：US06989750B2
公开(公告)日：2006-01-24
申请号：US10072984
申请日：2002-02-12
IPC分类号： G08B13/14
CPC分类号： G06K19/07749 , G06K7/0008 , G06K7/10039 , G06K7/10069 , G06K7/10108 , G06K7/10356 , G06K17/00 , G06K19/0713 , G06K19/0723 , G06K19/07767 , G08B13/2485 , G11C5/142 , H04L7/0331
摘要： A radio frequency identification (RFID) architecture is described. RFID tags are interrogated by a reader, which may be located in a network of readers. The reader transmits symbols to the tags. Tags respond to the interrogations with symbols that each represent one or more bits of data. An RFID tag includes an antenna pad, a receiver, a state machine, and a modulator. The receiver is coupled to the antenna pad. The receiver receives a symbol from the antenna pad and outputs a received signal. The state machine is configured to determine a response symbol from the received signal and an operating state of the tag. The modulator is coupled to the antenna pad. The modulator is configured to backscatter modulate the received symbol with the response symbol. The modulator is configured to output the backscatter modulated symbol to the antenna pad.
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9.发明授权Method, system, and apparatus for remote data calibration of a RFID tag population 有权用于RFID标签群的远程数据校准的方法，系统和装置公开(公告)号：US06784813B2
公开(公告)日：2004-08-31
申请号：US10072870
申请日：2002-02-12
IPC分类号： H03M508
CPC分类号： G06K19/07749 , G06K7/0008 , G06K7/10039 , G06K7/10069 , G06K7/10108 , G06K7/10356 , G06K17/00 , G06K19/0713 , G06K19/0723 , G06K19/07767 , G08B13/2485 , G11C5/142 , H04L7/0331
摘要： A method, system, and apparatus for remotely calibrating data symbols received by a radio frequency identification (RFID) tag population are described. Tags are interrogated by a reader, which may be located in a network of readers. The reader transmits data symbols to the tags. Tags respond to the interrogations with symbols that each represent one or more bits of data. To calibrate the tags, the reader transmits a plurality of pulses of different lengths to the tag population. The tags receive the plurality of pulses. A characteristic of each pulse, such as a pulse length, is stored by the tags. The stored pulse lengths are used to define different data symbols that are subsequently received by the tags from the reader.
摘要翻译： 描述用于远程校准由射频识别（RFID）标签群体接收的数据符号的方法，系统和装置。 标签被读者询问，读者可能位于读者网络中。 读卡器将数据符号发送到标签。 标签响应具有每个表示一个或多个数据位的符号的询问。 为了校准标签，读取器将多个不同长度的脉冲发送到标签群。 标签接收多个脉冲。 每个脉冲的特征，如脉冲长度，由标签存储。 存储的脉冲长度用于定义随后由读取器接收的标签的不同数据符号。
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10.发明授权Identification tag utilizing charge pumps for voltage supply generation and data recovery 有权识别标签利用电荷泵进行电压发生和数据恢复公开(公告)号：US06734797B2
公开(公告)日：2004-05-11
申请号：US10072985
申请日：2002-02-12
IPC分类号： G08B1314
CPC分类号： G06K19/07749 , G06K7/0008 , G06K7/10039 , G06K7/10069 , G06K7/10108 , G06K7/10356 , G06K17/00 , G06K19/0713 , G06K19/0723 , G06K19/07767 , G08B13/2485 , G11C5/142 , H04L7/0331
摘要： An identification (ID) tag includes a substrate having an input capable of receiving a high frequency signal. For instance, the high frequency signal can be a radio frequency (RF) signal that is generated as part of a radio frequency (RF) ID system. A first charge pump is coupled to the input and is configured to convert the high frequency signal to a substantially direct current (DC) voltage. A data recovery circuit is coupled to the input and is capable of recovering data from the high frequency signal. A back scatter switch is coupled to the input and is capable of modifying an impedance of the input, responsive to a control signal. A state machine is disposed on the substrate and is responsive to the data recovered by the second charge pump, where the state machine is capable of generating the control signal for the back scatter switch in response to the data. The DC voltage from the first charge pump is capable of providing a voltage supply for at least one of the data recovery circuit, the back scatter switch, and the state machine. The data recovery circuit includes a second charge pump that is capable of operating on the high frequency signal simultaneously with the first charge pump. In other words, the first charge pump can generate the supply voltage for the ID tag from the high frequency signal, while the second charge pump simultaneously retrieves the data from the high frequency signal. The first charge pump also includes a means for limiting the amplitude of the DC voltage by reducing the charge pump efficiency, once a threshold voltage is reached.
摘要翻译： 识别（ID）标签包括具有能够接收高频信号的输入的基板。 例如，高频信号可以是作为射频（RF）ID系统的一部分而生成的射频（RF）信号。 第一电荷泵耦合到输入端并被配置为将高频信号转换成基本上直流（DC）的电压。 数据恢复电路耦合到输入端并且能够从高频信号中恢复数据。 背散射开关耦合到输入端，并且能够响应于控制信号来修改输入的阻抗。 状态机设置在基板上并且响应于由第二电荷泵恢复的数据，其中状态机能够响应于数据而产生用于背散射开关的控制信号。 来自第一电荷泵的DC电压能够为数据恢复电路，后向散射开关和状态机中的至少一个提供电压源。 数据恢复电路包括能够与第一电荷泵同时对高频信号进行操作的第二电荷泵。 换句话说，第一电荷泵可以从高频信号产生ID标签的电源电压，而第二电荷泵同时从高频信号中检索数据。 第一电荷泵还包括一旦达到阈值电压，则通过降低电荷泵效率来限制直流电压的振幅的装置。
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