... 俄罗斯水电站：Russia 二阶有源滤波：Second-Order Active Filter 二端口全校准：full 2-port calibration ...
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Second-order low-pass active filter 二阶低通用源滤波器
Combining these networks with these topologies, 62 types of rc active second-order filter can be composited, 54 types of these circuits have not yet been published.
将这些网络和拓扑相结合，能产生62个二阶滤波电路，其中的54个未见报导。
By signal flow graph, a new universal active current mode second-order filter was designed basis on establishing MOS transistor small-signal model. The filter is of three-input and one-output.
在建立了MOS场效应管小信号模型的基础上，采用信号流图的方法设计了一个三输入一输出的二阶通用有源电流模式滤波器。
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