利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

43 条记录 (耗时 0.018 秒)

    APPARATUS AND METHODS FOR REMOVING A LARGE-SIGNAL VOLTAGE OFFSET FROM A BIOMEDICAL SIGNAL
    1.
    发明申请
    APPARATUS AND METHODS FOR REMOVING A LARGE-SIGNAL VOLTAGE OFFSET FROM A BIOMEDICAL SIGNAL 有权

    公开(公告)号：US20220240829A1

    公开(公告)日：2022-08-04

    申请号：US17584076

    申请日：2022-01-25

    申请人： BioSig Technologies, Inc.

    发明人： Budimir S. Drakulic ,  Sina Fakhar ,  Thomas G. Foxall ,  Branislav Vlajinic

    IPC分类号： A61B5/30 ,  A61B5/00 ,  A61B5/0245 ,  A61B5/318 ,  A61B5/308

    摘要： Apparatus and methods remove a voltage offset from an electrical signal, specifically a biomedical signal. A signal is received at a first operational amplifier and is amplified by a gain. An amplitude of the signal is monitored, by a first pair of diode stages coupled to an output of the first operational amplifier, for the voltage offset. The amplitude of the signal is then attenuated by the first pair of diode stages and a plurality of timing banks. The attenuating includes limiting charging, by the first pair of diode stages, of the plurality of timing banks and setting a time constant based on the charging. The attenuating removes the voltage offset persisting at a threshold for a duration of at least the time constant. Saturation of the signal is limited to a saturation recovery time while the saturated signal is gradually pulled into monitoring range over the saturation recovery time.

    Universal notch filter
    2.
    发明授权
    Universal notch filter 有权

    公开(公告)号：US11265031B2

    公开(公告)日：2022-03-01

    申请号：US17091357

    申请日：2020-11-06

    申请人： BIOSIG Technologies, Inc.

    发明人： Budimir S. Drakulic ,  Sina Fakhar ,  Thomas G. Foxall ,  Branislav Vlajinic

    IPC分类号： H04B1/10 ,  H04B1/04

    摘要： Systems, methods, and computer program product embodiments are disclosed for removing any fixed frequency interfering signal from an input signal without introducing artifacts that are not part of the original signal of interest. An embodiment operates by using a virtual buffer with a length that matches a length of one cycle of an interfering signal. The embodiment extracts the interfering signal into the virtual buffer. For a sample in the next cycle of the interfering signal that corresponds to a virtual memory location for the virtual buffer, the embodiment can update one or more physical memory locations of the virtual buffer that are in the vicinity of the virtual memory location. This use of virtual buffer can remove any interfering signal without creating the artifacts associated with conventional notch filters.