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    PROGRAMMABLE FILTER
    1.
    发明申请
    PROGRAMMABLE FILTER 有权
    可编程过滤器

    公开(公告)号：US20150097637A1

    公开(公告)日：2015-04-09

    申请号：US14050181

    申请日：2013-10-09

    Applicant: ANALOG DEVICES, INC.

    Inventor： Andrew Pye ,  Marc E. Goldfarb

    IPC: H03H7/01 ,  H03H11/04

    CPC classification number: H03H11/04 ,  H01F21/12 ,  H01F27/2804 ,  H01F2021/125 ,  H03H7/01 ,  H03H7/0115 ,  H03H7/0153 ,  H03H7/09

    Abstract: In one example embodiment, a programmable filter is provided, including a plurality of variable-inductance networks and a plurality of variable-capacitance networks. The programmable filter may be implemented in a classical filter topology, with variable-capacitance networks replacing discrete capacitors and variable-inductance networks replacing discrete inductors. An example variable-inductance network comprises a primary inductor with an intermediate tap, and secondary inductor connected at the intermediate tap, with switches for selecting an inductance.

    Abstract translation: 在一个示例性实施例中，提供了可编程滤波器，包括多个可变电感网络和多个可变电容网络。 可编程滤波器可以在经典滤波器拓扑中实现，其中可变电容网络代替分立电容器和替代离散电感器的可变电感网络。 示例性可变电感网络包括具有中间抽头的初级电感器和在中间抽头处连接的次级电感器，用于选择电感的开关。

    Programmable filter
    2.
    发明授权
    Programmable filter 有权
    可编程滤波器

    公开(公告)号：US09172353B2

    公开(公告)日：2015-10-27

    申请号：US14050181

    申请日：2013-10-09

    Applicant: ANALOG DEVICES, INC.

    Inventor： Andrew Pye ,  Marc E. Goldfarb

    IPC: H03H7/00 ,  H03B1/00 ,  H03K5/00 ,  H03H11/04 ,  H01F27/28 ,  H03H7/01 ,  H03H7/09

    CPC classification number: H03H11/04 ,  H01F21/12 ,  H01F27/2804 ,  H01F2021/125 ,  H03H7/01 ,  H03H7/0115 ,  H03H7/0153 ,  H03H7/09

    Abstract: In one example embodiment, a programmable filter is provided, including a plurality of variable-inductance networks and a plurality of variable-capacitance networks. The programmable filter may be implemented in a classical filter topology, with variable-capacitance networks replacing discrete capacitors and variable-inductance networks replacing discrete inductors. An example variable-inductance network comprises a primary inductor with an intermediate tap, and secondary inductor connected at the intermediate tap, with switches for selecting an inductance.

    Abstract translation: 在一个示例性实施例中，提供了可编程滤波器，包括多个可变电感网络和多个可变电容网络。 可编程滤波器可以在经典滤波器拓扑中实现，其中可变电容网络代替分立电容器和替代离散电感器的可变电感网络。 示例性可变电感网络包括具有中间抽头的初级电感器和在中间抽头处连接的次级电感器，用于选择电感的开关。

    COUPLED-LINE BALUN WITH COMMON-MODE NULLING
    3.
    发明申请
    COUPLED-LINE BALUN WITH COMMON-MODE NULLING 审中-公开

    公开(公告)号：US20180123551A1

    公开(公告)日：2018-05-03

    申请号：US15366966

    申请日：2016-12-01

    Applicant: ANALOG DEVICES, INC.

    Inventor： Andrew Pye

    IPC: H03H7/42

    CPC classification number: H03H7/422 ,  H01P5/10 ,  H03F1/565 ,  H03F3/189 ,  H03F3/45475 ,  H03F3/60 ,  H03F2200/06

    Abstract: Coupled-line baluns with common-mode compensation are provided herein. In certain configurations, a series resistor-inductor (RL) network is connected to ports of a coupled-line balun to null the common-mode transmission coefficient at a desired frequency. This extends performance at lower frequencies by improving the low frequency amplitude and phase balance of the device. The inductor and resistor can be connected in series between one of the differential terminals and a single-ended grounded terminal. This advantageously can null the common-mode transmission at a specific frequency near a minimum length-dominated frequency so as to enhance the common-mode rejection at lower frequencies.

    Coupled-line balun with common-mode nulling
    4.
    发明授权
    Coupled-line balun with common-mode nulling 有权

    公开(公告)号：US10122341B2

    公开(公告)日：2018-11-06

    申请号：US15366966

    申请日：2016-12-01

    Applicant: ANALOG DEVICES, INC.

    Inventor： Andrew Pye

    IPC: H03H7/42 ,  H01P5/10

    Abstract: Coupled-line baluns with common-mode compensation are provided herein. In certain configurations, a series resistor-inductor (RL) network is connected to ports of a coupled-line balun to null the common-mode transmission coefficient at a desired frequency. This extends performance at lower frequencies by improving the low frequency amplitude and phase balance of the device. The inductor and resistor can be connected in series between one of the differential terminals and a single-ended grounded terminal. This advantageously can null the common-mode transmission at a specific frequency near a minimum length-dominated frequency so as to enhance the common-mode rejection at lower frequencies.

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