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    • 81. 发明授权
    • RIFD device with microstrip antennas
    • 带有微带天线的RIFD器件
    • US08004468B2
    • 2011-08-23
    • US12483090
    • 2009-06-11
    • Tareef Ibrahim Al-Mahdawi
    • Tareef Ibrahim Al-Mahdawi
    • H01Q1/38G08B13/14G06K19/06
    • H01Q1/2225H01Q25/005
    • A Radio Frequency Identification (RFID) device according to one embodiment of the present invention includes a first microstrip antenna comprising a microstrip positioned towards a first side of the device, and a Radio Frequency—(RF-)reflective back plane spaced from the microstrip of the first microstrip antenna; a second microstrip antenna comprising a microstrip positioned farther from the first side of the device than the microstrip of the first microstrip antenna, and an RF-reflective back plane spaced from the microstrip of the second microstrip antenna; and circuitry for receiving signals from the first and second microstrip antennas, wherein the first and second microstrip antennas are each independently coupled to the circuitry.
    • 根据本发明的一个实施例的射频识别(RFID)设备包括:第一微带天线,包括朝向设备的第一侧定位的微带;以及射频(RF)反射背板,与微带的微带 第一个微带天线; 第二微带天线,包括位于比第一微带天线的微带更远离器件的第一侧的微带,以及与第二微带天线的微带间隔开的RF反射背面; 以及用于从第一和第二微带天线接收信号的电路,其中第一和第二微带天线各自独立地耦合到电路。
    • 82. 发明授权
    • Fully differential amplifier with continuous-time offset reduction
    • 具有连续时间偏移量的全差分放大器
    • US07683717B2
    • 2010-03-23
    • US11303897
    • 2005-12-15
    • Ta-wei YangJyn-Bang ShyuRobert Olah
    • Ta-wei YangJyn-Bang ShyuRobert Olah
    • H03F3/45
    • H03F3/45183H03F3/45744H03F2203/45101H03F2203/45134H03F2203/45642H03F2203/45652H03F2203/45681
    • Fully differential amplifier circuits are described herein that set the common mode voltage as well as reduce the output offset voltage (offset cancellation). A circuit according to one embodiment includes a first section for generating first and second output signals on first and second outputs from first and second input signals, a first negative feedback loop coupled to the first section, and a second negative feedback loop coupled to the first section. A second section controls the first negative feedback loop for adjusting the first output signal towards a common mode voltage level, and for reducing an offset voltage of the first output signal in different loop bandwidths. A third section controls the second negative feedback loop for adjusting the second output signal towards the common mode voltage level, and for reducing an offset voltage of the second output signal in different loop bandwidths.
    • 这里描述的全差分放大器电路设置共模电压以及降低输出偏移电压(偏移消除)。 根据一个实施例的电路包括用于在第一和第二输入信号的第一和第二输出上产生第一和第二输出信号的第一部分,耦合到第一部分的第一负反馈环路和耦合到第一部分的第二负反馈回路 部分。 第二部分控制第一负反馈回路,用于将第一输出信号调整到共模电压电平,并用于减小不同环路带宽中的第一输出信号的偏移电压。 第三部分控制用于将第二输出信号调整到共模电压电平的第二负反馈回路,并且用于在不同的环路带宽中减小第二输出信号的偏移电压。
    • 84. 发明授权
    • Battery activation circuit
    • 电池启动电路
    • US07612652B2
    • 2009-11-03
    • US11007973
    • 2004-12-08
    • Roger Green StewartDaniel Noah Paley
    • Roger Green StewartDaniel Noah Paley
    • H04Q5/22
    • G06K19/0705G06K19/0707G06K19/0712G06K19/0723
    • A system and method for selectively activating a device based on an activate command. A circuit, in low power mode, listens for an activate command. The activate command includes a preamplifer centering sequence, an interrupt signal, and an activate code. The circuit receives a signal that may or may not be an activate command, self-biases the signal based on the preamplifer centering in the preamp/gain control, then determines whether the interrupt signal is of the proper length in the interrupt circuit. If the interrupt is not the proper length, the process stops. If it is the proper length, the command is recognized as an activate command, and a data slicer compares the activate code to a prestored value. If the activate code matches the prestored value, the device is powered up. If they do not match, the device is not initiated.
    • 一种用于基于激活命令选择性地激活设备的系统和方法。 在低功率模式下的电路监听激活命令。 激活命令包括前置放大器对中序列,中断信号和激活码。 该电路接收可能激活命令或不是激活命令的信号,根据前置放大器/增益控制中的前置放大器定心自身偏置信号,然后确定中断信号在中断电路中是否具有合适的长度。 如果中断不正确的长度,程序停止。 如果它是适当的长度,则该命令被识别为激活命令,并且数据限幅器将激活代码与预存值进行比较。 如果激活码与预先存储的值相匹配,则设备通电。 如果它们不匹配,则不启动该设备。
    • 85. 发明授权
    • Differential input circuit with process variation and temperature compensation
    • 差分输入电路,具有过程变化和温度补偿
    • US07611066B2
    • 2009-11-03
    • US11143019
    • 2005-06-01
    • Jyn-Bang Shyu
    • Jyn-Bang Shyu
    • G06K19/06G08B13/14
    • H03D1/10
    • Systems with semiconductor devices that are DC-biased at either their weak inversion (i.e., sub-threshold) region or their strong inversion region. In a preferred embodiment using semiconductor devices (e.g., NMOS, PMOS, etc.), a gate to source voltage (Vgs) is slightly below the threshold voltage (Vtn) of the device. These weakly turned-on semiconductor devices increase the receiving AC sensitivity of an AM-Detector compared to that of a conventional AM-Detector without any DC-biasing. Further, the compensating bias voltage (Vbias) compensates for one or both of the ambient temperature change and the foundry's process variation of the various semiconductor devices.
    • 具有在其弱反转(即子阈值)区域或其强反转区域中被直流偏置的半导体器件的系统。 在使用半导体器件(例如,NMOS,PMOS等)的优选实施例中,栅极 - 源极电压(Vgs)略低于器件的阈值电压(Vtn)。 这些弱导通的半导体器件与没有任何DC偏置的常规AM检测器相比,增加了AM检测器的接收AC灵敏度。 此外,补偿偏置电压(Vbias)补偿了各种半导体器件的环境温度变化和铸造工艺变化中的一个或两个。
    • 90. 发明申请
    • SYSTEM, METHOD AND COMPUTER PROGRAM PRODUCT FOR CALIBRATING INTERROGATOR SIGNAL STRENGTH AND/OR TAG RESPONSE RANGE SETTING
    • 用于校准干涉仪信号强度和/或标签响应范围的系统,方法和计算机程序产品
    • US20070290802A1
    • 2007-12-20
    • US11423414
    • 2006-06-09
    • Naresh BatraHeena Nandu
    • Naresh BatraHeena Nandu
    • H04Q5/22
    • G06K7/0008G06K7/10039H04B5/0062H04B17/21
    • A system, method and computer program product according to one embodiment are provided for calibrating an RFID interrogator. A signal is sent from an interrogator to a calibration device. A backscatter signal is received from the calibration device. The backscatter from the calibration device is analyzed. An outgoing signal strength of the interrogator is adjusted based on the analysis. In a system, method and computer program product according to another embodiment, the interrogator is set to selectively respond to tags returning a backscatter signal strength selected based on the analysis. In a system, method and computer program product according to another embodiment, comparison criteria is selected based on the analysis of the backscatter signal. An RF device is instructed to store the comparison criteria, which is then used by the RF device to selectively respond to an interrogator signal having at least a desired strength.
    • 提供根据一个实施例的系统,方法和计算机程序产品,用于校准RFID询问器。 信号从询问器发送到校准装置。 从校准装置接收反向散射信号。 分析来自校准装置的反向散射。 基于分析调整询问器的输出信号强度。 在根据另一实施例的系统,方法和计算机程序产品中,询问器被设置为选择性地响应返回基于分析选择的反向散射信号强度的标签。 在根据另一实施例的系统,方法和计算机程序产品中,基于后向散射信号的分析来选择比较标准。 指示RF设备存储比较标准,然后由RF设备使用该标准来选择性地响应具有至少所需强度的询问器信号。