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    • 2. 发明授权
    • Tag reading method and apparatus
    • 标签阅读方法和设备
    • US07159775B2
    • 2007-01-09
    • US10854584
    • 2004-05-26
    • Nobuhisa AokiToru ManiwaTakeshi Takano
    • Nobuhisa AokiToru ManiwaTakeshi Takano
    • G06K7/08
    • G06K7/10336G06K7/10346H01Q1/22H01Q1/2216
    • Disclosed in a reading apparatus for supplying power to at least one of a plurality of superimposed RF tags and reading information from the tag while power is being supplied thereto. The apparatus includes means for generating high-frequency signals; electromagnetic wave generating means to which the high-frequency signals are input for generating electromagnetic waves from a plurality of locations, e.g., from both sides of the superimposed tags, by the high-frequency signals and causing the electromagnetic waves to interfere with each other on the tags; means for controlling the phase difference between the high-frequency signals, which are supplied to the electromagnetic wave generating means provided on both sides of the tags, in accordance with the position of a tag from which information is read; and phase shifting means for controlling the phase of at least one high-frequency signal so to produce the phase difference.
    • 公开在用于向多个叠加RF标签中的至少一个提供电力并且在向其提供电力时从标签读取信息的读取装置中。 该装置包括用于产生高频信号的装置; 输入高频信号的电磁波产生装置,用于通过高频信号从多个位置(例如,从叠加的标签的两侧)产生电磁波,并使电磁波相互干扰 标签; 用于根据读取信息的标签的位置来控制提供给设置在标签两侧的电磁波产生装置的高频信号之间的相位差的装置; 以及用于控制至少一个高频信号的相位以产生相位差的相移装置。
    • 3. 发明授权
    • Power amplifier with distortion compensation circuit
    • 具有失真补偿电路的功率放大器
    • US07663436B2
    • 2010-02-16
    • US12000616
    • 2007-12-14
    • Takeshi TakanoYasuyuki OishiToru Maniwa
    • Takeshi TakanoYasuyuki OishiToru Maniwa
    • H03F1/26
    • H03F1/3247H03F1/30H03F1/3282H03F2201/3209H03F2201/3212H03F2201/3224H03F2201/3233
    • A power amplifier negates a memory effect and is applied a linearizer using a digital predistortion system even in an inexpensive device. The power amplifier compares an input signal power against a sampled component of an output power, and provides predistortion to the input signal power so as to minimize a difference as a result of the comparison. The power amplifier comprises a gain lookup table storing a gain coefficient value corresponding to a temperature address determined for an input power; a phase lookup table storing a phase coefficient value corresponding to the temperature address determined for the input power; a transversal filter, which is input with the input power, and which outputs the temperature address; and a coefficient multiplier modulating the input signal using a gain coefficient value and a phase coefficient value, which correspond to the temperature address and which are read out from the gain coefficient lookup table and the phase lookup table.
    • 功率放大器消除了记忆效应,并且即使在廉价的设备中也使用数字预失真系统应用线性化。 功率放大器将输入信号功率与输出功率的采样分量进行比较,并且为输入信号功率提供预失真,以便作为比较的结果使差异最小化。 功率放大器包括:增益查找表,其存储对应于为输入功率确定的温度地址的增益系数值; 相位查找表,存储与为输入功率确定的温度地址对应的相位系数值; 横向滤波器,其输入有输入功率,并输出温度地址; 以及系数乘法器,其使用与所述温度地址对应并且从所述增益系数查找表和所述相位查找表读出的增益系数值和相位系数值来调制所述输入信号。
    • 9. 发明申请
    • Power amplifier with distortion compensation circuit
    • 具有失真补偿电路的功率放大器
    • US20080094139A1
    • 2008-04-24
    • US12000616
    • 2007-12-14
    • Takeshi TakanoYasuyuki OishiToru Maniwa
    • Takeshi TakanoYasuyuki OishiToru Maniwa
    • H03F1/26
    • H03F1/3247H03F1/30H03F1/3282H03F2201/3209H03F2201/3212H03F2201/3224H03F2201/3233
    • A power amplifier negates a memory effect and is applied a linearizer using a digital predistortion system even in an inexpensive device. The power amplifier compares an input signal power against a sampled component of an output power, and provides predistortion to the input signal power so as to minimize a difference as a result of the comparison. The power amplifier comprises a gain lookup table storing a gain coefficient value corresponding to a temperature address determined for an input power; a phase lookup table storing a phase coefficient value corresponding to the temperature address determined for the input power; a transversal filter, which is input with the input power, and which outputs the temperature address; and a coefficient multiplier modulating the input signal using a gain coefficient value and a phase coefficient value, which correspond to the temperature address and which are read out from the gain coefficient lookup table and the phase lookup table.
    • 功率放大器消除了记忆效应,并且即使在廉价的设备中也使用数字预失真系统应用线性化。 功率放大器将输入信号功率与输出功率的采样分量进行比较,并且为输入信号功率提供预失真,以便作为比较的结果使差异最小化。 功率放大器包括:增益查找表,其存储对应于为输入功率确定的温度地址的增益系数值; 相位查找表,存储与为输入功率确定的温度地址对应的相位系数值; 横向滤波器,其输入有输入功率,并输出温度地址; 以及系数乘法器,其使用与所述温度地址对应并且从所述增益系数查找表和所述相位查找表读出的增益系数值和相位系数值来调制所述输入信号。