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    • 6. 发明授权
    • Signal conditioner for biological signals
    • 信号调理器用于生物信号
    • US4540000A
    • 1985-09-10
    • US561810
    • 1983-12-15
    • Richard F. DohertyAnthony Pierry
    • Richard F. DohertyAnthony Pierry
    • A61B5/0428A61B5/04G01R17/06H03G3/20
    • H03G3/20A61B5/04004G01R17/06
    • A signal conditioner for use with cardiographic data and other biological signals includes a baseline shift circuit and a variable gain amplifier. A feedback loop is provided for the output signal with a reference which designates the maximum value of the output signal. Within the baseline shifting circuit, there is provided circuitry which compares the amount of offset of the negative excursions of the waveform from a reference lead so as to introduce a feedback compensation signal which shifts the baseline and thereby compensates for drift in the baseline. Integration circuitry in the form of counters of clock pulses are provided in the control of both amplifier gain and baseline shift. Timing circuitry provides for the interleaving of set-up intervals with data aquisition intervals, the gain adjustment and baseline adjustment being accomplished only during the set-up intervals. Sensing of temporal data by waveform analysis is utilized for restarting the timing sequence whenever the format of the sensed biological signal falls outside of the predetermined limits.
    • 用于心脏数据和其他生物信号的信号调节器包括基线移位电路和可变增益放大器。 为输出信号提供了一个反馈回路,该参考指定了输出信号的最大值。 在基线移位电路内,提供电路,其比较来自参考引线的波形的负偏移的偏移量,以引入偏移基线的反馈补偿信号,从而补偿基线中的漂移。 在放大器增益和基线偏移两者的控制中提供了时钟脉冲计数器形式的积分电路。 定时电路提供了设置间隔与数据采集间隔的交错,增益调整和基线调整仅在设置间隔期间完成。 每当检测到的生物信号的格式超出预定限度时,通过波形分析来检测时间数据被用于重新启动定时序列。