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    • 5. 发明授权
    • Impedance line matching device using feedback
    • 阻抗线匹配装置使用反馈
    • US4633225A
    • 1986-12-30
    • US588179
    • 1984-03-12
    • Toshio HayashiYouichi Maeda
    • Toshio HayashiYouichi Maeda
    • H03H17/00H04L25/04H03K13/02
    • H03H17/00
    • A circuit for generating a desired two terminal impedance at the two terminals by coupling analog signals appearing at the two terminals into an analog to digital converter, supplying the output therefrom to a digital processing circuit, leading the outputs therefrom to a digital analog converter, and connecting the output therefrom to the two terminals to form a feedback loop. The digital processing circuit processes using a desired transfer function. An analog processing circuit is provided which receives the analog signals appearing at said two terminals as input, and which passes the component of the signal having frequencies higher than the frequencies processed in the digital processing circuit. The output from the analog processing circuit is connected to the two terminals to form another feedback loop, and the component of higher frequencies is coupled to pass the analog processing circuit instead of the digital processing circuit to lower the frequencies to be processed in the digital processing circuit, thus enabling to use a less costly digital processing circuit.
    • 一种用于通过将出现在两个端子处出现的模拟信号耦合到模数转换器,在两端产生期望的两端阻抗的电路,将其输出提供给数字处理电路,将其输出引到数模转换器,以及 将其输出连接到两个端子以形成反馈回路。 数字处理电路使用期望的传递函数进行处理。 提供了一种模拟处理电路,其接收出现在所述两个终端处的模拟信号作为输入,并且通过具有高于在数字处理电路中处理的频率的频率的信号的分量。 模拟处理电路的输出连接到两个端子以形成另一个反馈回路,并且耦合较高频率的分量以通过模拟处理电路而不是数字处理电路以降低数字处理中要处理的频率 电路,从而能够使用成本较低的数字处理电路。