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    Filter having frequency-dependent transmission properties for electric analog signals
    61.
    发明授权
    Filter having frequency-dependent transmission properties for electric analog signals 失效
    滤波器具有电模拟信号的频率依赖传输特性

    公开(公告)号：US3967099A

    公开(公告)日：1976-06-29

    申请号：US402348

    申请日：1973-10-01

    Applicant: Alfred Fettweis

    Inventor： Alfred Fettweis

    IPC: H03H17/02 ,  G06F15/34 ,  H03H7/10

    CPC classification number: H03H17/0201

    Abstract: In one illustrative embodiment, a basic filter circuit for discrete signals is provided corresponding in filter function to an analog ladder network containing inductive and capacitive components. The reactive components of the analog filter structure are realized in the basic filter circuit as one-port and two-port elements having time delay, while non-reactive components of the analog filter are realized as time-delay-free one-port and plural-port elements. Interface means connect the port elements together in a configuration corresponding to the configuration of the analog filter, with sets of adder and multiplier means of the interface circuitry which couple successive sets of the port elements to each other being correlated with the connective relationship (whether series, series-parallel or parallel) between the corresponding components or branches of the analog filter and with the parameters of the analog components, so that the basic filter circuit essentially simulates the analog filter structure in its filter characteristics.

    Abstract translation: 在一个说明性实施例中，用于离散信号的基本滤波器电路在滤波器功能中被提供给包含电感和电容分量的模拟梯形网络。 模拟滤波器结构的无功分量在基本滤波器电路中实现为具有时间延迟的单端口和双端口元件，而模拟滤波器的无功分量实现为无延时的单端口和复数 端口元素。 接口意味着以对应于模拟滤波器的配置的配置将端口元件连接在一起，使得将连续的端口元件组彼此耦合的接口电路的加法器和乘法器装置的集合与连接关系相关 串并联或并联）在模拟滤波器的相应组件或分支之间以及模拟组件的参数，使得基本滤波器电路基本上模拟其滤波器特性中的模拟滤波器结构。

    MODIFIED DIGITAL FILTERING WITH SAMPLE ZONING
    67.
    发明申请
    MODIFIED DIGITAL FILTERING WITH SAMPLE ZONING 审中-公开

    公开(公告)号：US20170194941A1

    公开(公告)日：2017-07-06

    申请号：US15301383

    申请日：2015-04-01

    Applicant: Lachlan Paul BARRATT

    Inventor： Lachlan Paul BARRATT

    IPC: H03H17/02 ,  H04R3/04

    CPC classification number: H03H17/0201 ,  H03H17/02 ,  H03H17/0213 ,  H03H17/0294 ,  H03H2017/0072 ,  H03H2218/14 ,  H04R3/04

    Abstract: The present invention relates broadly to a method of digitally filtering a signal, such as an audio signal, using a digital filter. The digital filter includes a plurality of neighbouring sample points broken into zones having different frequency content or frequency ranges. The zones adjacent one another may have neighbouring sample points in common. Generally each zone has at least same distinct frequencies compared with other zones. That is, the zones are roughly dependent on the frequency content. The invention in its preferred form involves combining values for two or more of the neighbouring sample points for select of the zones depending on its frequency content. The values are combined so as to provide a modified zone having substantially the same number of sample points as the select zone. The modified zones together provide a modified filter to be applied to the signal.

    Method and apparatus for signal filtering and for improving properties of electronic devices
    70.
    发明授权
    Method and apparatus for signal filtering and for improving properties of electronic devices 有权

    公开(公告)号：US09467113B2

    公开(公告)日：2016-10-11

    申请号：US14159033

    申请日：2014-01-20

    Applicant: Avatekh, Inc.

    Inventor： Alexei V. Nikitin

    IPC: G06G7/02 ,  H03H7/01 ,  H03H11/12 ,  H03H21/00 ,  H03H11/24

    CPC classification number: H03H17/0219 ,  H03H7/0153 ,  H03H11/1256 ,  H03H11/1291 ,  H03H11/24 ,  H03H17/0201 ,  H03H21/0001 ,  H03H21/0016 ,  H03H2210/043 ,  H03M1/1235

    Abstract: The present invention relates to nonlinear signal processing, and, in particular, to adaptive nonlinear filtering of real-, complex-, and vector-valued signals utilizing analog Nonlinear Differential Limiters (NDLs), and to adaptive real-time signal conditioning, processing, analysis, quantification, comparison, and control. More generally, this invention relates to methods, processes and apparatus for real-time measuring and analysis of variables, and to generic measurement systems and processes. This invention also relates to methods and corresponding apparatus for measuring which extend to different applications and provide results other than instantaneous values of variables. The invention further relates to post-processing analysis of measured variables and to statistical analysis. The NDL-based filtering method and apparatus enable improvements in the overall properties of electronic devices including, but not limited to, improvements in performance, reduction in size, weight, cost, and power consumption, and, in particular for wireless devices, NDLs enable improvements in spectrum usage efficiency.

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