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1. 发明申请

WO2003063076A1 PASSIVE RFID TAG THAT RETAINS STATE AFTER TEMPORARY LOSS OF POWER 审中-公开
标题翻译：无源RFID标签，在暂时的功率损耗后保留状态
公开(公告)号：WO2003063076A1
公开(公告)日：2003-07-31
申请号：PCT/US2003/000755
申请日：2003-01-10
申请人： INTERMEC IP CORP. , HEINRICH, Harley, Kent , PILLAI, Vijay , DIESKA, David, E.
发明人： HEINRICH, Harley, Kent , PILLAI, Vijay , DIESKA, David, E.
IPC分类号： G06K19/07
CPC分类号： G06K19/0701 , G06K19/0723 , G06K19/073
摘要： The present invention provides an RFID transponder that includes a state holding cell (24) that maintains the present state of the RFID transponder during temporary losses of power. After power is restored to the RFID transponder, the state holding cell restores the present state to the RFID transponder so that transactions with an RFID interrogator can continue without having re-transmit redundant commands. The RFID transponder further comprises an RF front end (14) adapted to receive an interrogating RF signal. An analog circuit (18) is coupled to the RF front end and is adapted to recover analog signals from the received interrogating RF signal. The analog circuit provides state information defining a desired state of the RFID transponder corresponding to the analog signals. A digital state machine (20) is coupled to the analog circuit and adapted to execute at least one command in accordance with the state information. A memory (22) is coupled to the digital state machine and is adapted to store and retrieve digital data responsive to the at least one command executed by the digital state machine. A power capacitor (16) is coupled to the RF front end and derives a voltage rectified from the interrogating RF signal to charge the power capacitor. The power capacitor thereby provides electrical power for the analog circuit, the digital state machine and the memory. The state holding cell (24) is coupled to the analog circuit and the digital state machine and is adapted to maintain the state information during a loss in power provided by the power capacitor due to lapse in receipt of the interrogating RF signal by the RF front end.
摘要翻译：本发明提供一种RFID应答器，其包括状态保持单元（24），其在暂时的功率损耗期间保持RFID应答器的当前状态。在将电力恢复到RFID应答器之后，状态保持单元将当前状态恢复到RFID应答器，使得与RFID询问器的交易可以在不重新传输冗余命令的情况下继续进行。 RFID应答器还包括适于接收询问RF信号的RF前端（14）。模拟电路（18）耦合到RF前端，并且适于从所接收的询问RF信号中恢复模拟信号。模拟电路提供定义对应于模拟信号的RFID应答器的期望状态的状态信息。数字状态机（20）耦合到模拟电路，并且适于根据状态信息执行至少一个命令。存储器（22）耦合到数字状态机，并且适于响应于由数字状态机执行的至少一个命令来存储和检索数字数据。功率电容器（16）耦合到RF前端，并导出从询问RF信号整流的电压，以对功率电容器充电。因此，电力电容器为模拟电路，数字状态机和存储器提供电力。状态保持单元（24）耦合到模拟电路和数字状态机，并且适于在由RF正面接收到询问RF信号的过程中由功率电容器提供的功率损耗期间维持状态信息结束。

2. 发明申请

WO2006132732A2 SYSTEM AND METHOD OF READING FROM AND/OR WRITING TO AN RF TRANSPONDER 审中-公开
标题翻译：从RF读写器读取和/或写入RF传输器的系统和方法
公开(公告)号：WO2006132732A2
公开(公告)日：2006-12-14
申请号：PCT/US2006/016806
申请日：2006-05-02
申请人： INTERMEC IP CORP. , PILLAI, Vijay , HEINRICH, Harley , MARTINEZ, Rene
发明人： PILLAI, Vijay , HEINRICH, Harley , MARTINEZ, Rene
IPC分类号： H04Q5/22
CPC分类号： G06K7/0008
摘要： At least one identification (ID) number is used to effectuate communication between a radio frequency (RF) number and a radio frequency identification (RFID) base station. In accordance with a first embodiment of the present invention, at least a first ID number and a second ID number are stored on an RF transponder. Upon receipt of a write request, the RF transponder compares an ID number portion of the write request with the second ID number stored on the RF transponder. If the numbers matched, then a data portion of the write request is stored on the RF transponder. If the ID numbers do not match, then the write request is ignored. In accordance with a second embodiment of the present invention, the RF transponder is adapted to determine the second ID number using at least a portion of the first ID number. For example, the second ID number could be a subset of the first ID number, determined using an algorithm that is based (at least in part) on a portion of the first ID number, etc. In accordance with a third embodiment of the present invention, the second ID number is independent of the first ID number. For example, the second ID number could be a constant that is unrelated to the first ID number. In accordance with a fourth embodiment of the present invention, the data portion of the write request is stored on the RF transponder before the ID number portion of the write request is compared to the ID number stored on the RF transponder. If the ID number portion of the write request matches the ID number stored on the RF transponder, then the stored data is left undisturbed. If, however, the ID numbers do not match, then the stored data is erased (e.g., replaced with a null set, the original data, etc.).
摘要翻译：使用至少一个标识（ID）号来实现射频（RF）号码和射频识别（RFID）基站之间的通信。根据本发明的第一实施例，至少第一ID号和第二ID号被存储在RF转发器上。在接收到写请求时，RF转发器将写请求的ID号部分与存储在RF转发器上的第二ID号进行比较。如果数字匹配，则写请求的数据部分被存储在RF转发器上。如果ID号不匹配，则写请求将被忽略。根据本发明的第二实施例，RF应答器适于使用第一ID号码的至少一部分来确定第二ID号码。例如，第二ID号可以是使用基于（至少部分地）第一ID号码的一部分上的算法等确定的第一ID号码的子集。根据本发明的第三实施例发明，第二ID号与第一ID号无关。例如，第二ID号可以是与第一ID号无关的常数。根据本发明的第四实施例，在将写入请求的ID号部分与存储在RF转发器中的ID号进行比较之前，将写请求的数据部分存储在RF转发器上。如果写入请求的ID号部分与存储在RF发送应答器上的ID号码相匹配，则保存的数据不受干扰。然而，如果ID号不匹配，则存储的数据被擦除（例如，被替换为空集合，原始数据等）。

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