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    • 5. 发明公开
    • Dual-channel passband filtering system using acoustic resonators in lattice topology
    • Zweikanaliges带通滤波器系统在Gittertopologie中的akustischen Resonatoren
    • EP1298798A2
    • 2003-04-02
    • EP02018959.3
    • 2002-08-26
    • Nokia Corporation
    • Tikka, PasiEllä, Juha
    • H03H9/70
    • H03H9/009H03H9/70
    • A dual-channel passband filtering system having a first, second and third balanced ports for connecting, respectively, to a first transceiver, an antenna and a second transceiver. A first lattice-type passband filter is connected between the first and the second port, and a second lattice-type passband filter is connected between the second and the third port. A phase shifter is used to match the first and second transceiver and the second port. A balun can be used for each port to convert the balanced port to a single-ended port. In each passband filter, two series resonators are use to provide two balanced ends, and two shunt resonators are connected to the series resonators in a crisscross fashion to form a differential or balanced topology. The first and second passband filters have different frequencies.
    • 一种双通道通带滤波系统,具有第一,第二和第三平衡端口,用于分别连接到第一收发器,天线和第二收发器。 第一格式通带滤波器连接在第一和第二端口之间,第二格式通带滤波器连接在第二和第三端口之间。 移相器用于匹配第一和第二收发器和第二端口。 每个端口可以使用平衡 - 不平衡变换器,将平衡端口转换为单端口。 在每个通带滤波器中,使用两个串联谐振器来提供两个平衡端,并且两个并联谐振器以十字形方式连接到串联谐振器,以形成差分或平衡拓扑。 第一和第二通带滤波器具有不同的频率。
    • 7. 发明公开
    • A FILTER SUBSYSTEM
    • FILTER子系统
    • EP3093991A1
    • 2016-11-16
    • EP15167352.2
    • 2015-05-12
    • Services Pétroliers SchlumbergerSCHLUMBERGER TECHNOLOGY B.V.Schlumberger Holdings Limited
    • Arun Kumar, SwapnaBarakat, Simon
    • H03H9/70
    • H03H9/70
    • A filter subsystem (1) having an analog signal input (2) and a filtered analog signal output (4), one or more input-side components connected in electrical communication with the analog signal input (2) and configured to output an analog electric signal for filtering and one or more output-side components connected in electrical communication with the filtered analog signal output (4) and configured to perform one or more further operations on a filtered analog electric signal. The filter subsystem (1) includes a piezoelectric transformer (3) as a filtering device having a primary side configured to receive the analog electric signal to be filtered and a secondary side configured to output the filtered analog electric signal, and the piezoelectric transformer is configured to filter the analog electric signal to form the filtered analog electric signal, where a filter operation of the piezoelectric transformer is determined by a resonant frequency of a primary vibration mode of the piezoelectric transformer.
    • 一个具有模拟信号输入(2)和滤波的模拟信号输出(4)的滤波器子系统(1),与模拟信号输入(2)电连接的一个或多个输入侧分量,并被配置为输出模拟电 与滤波后的模拟信号输出(4)电连接的一个或多个输出侧组件,并被配置为对滤波的模拟电信号执行一个或多个进一步的操作。 滤波器子系统(1)包括作为滤波装置的压电变压器(3),其具有被配置为接收待滤波的模拟电信号的初级侧和被配置为输出滤波的模拟电信号的次级侧,并且配置压电变压器 滤波模拟电信号以形成滤波的模拟电信号,其中压电变压器的滤波器操作由压电变压器的主振动模式的谐振频率确定。