The active filter acts as an infinite impedance to the external for the fundamental frequency and as a low resistor for harmonic frequencies.
对外电路而言，在基波频率下有源滤波器被控制为无限大阻抗，在谐波频率下被控制为小电阻。
Simulation results indicate that dual slope algorithm is of high stability during external faults and is very sensitive to high impedance internal faults.
仿真结果表明：双比率算法较单比率算法，具有外部故障高稳定性，而在内部高阻故障时，也有很高的灵敏度。
They have a simple construction with low power dissipation and low output impedance and can be used as interfacing circuits in VLSI designs to reduce the number of external connections on a chip.
它们有一个低功耗与低输出阻抗的简单结构，可以用作超大规模集成电路设计中的接口电路，以减少基片的外部引线数。
It USES the positive impedance in static stability and low-voltage impedance which can effectively prevent the mal-operation in external faults.
静稳阻抗和低电势阻抗采用正序阻抗，能有效地防止外部短路造成的误动作。
Based on the analytical solution of RSJ model with the existence of external radiation, a method for finding voltage response and RF impedance of superconducting weak links is proposed and discussed.
本文讨论用外辐射rsj模型的解析解求超导弱连接的电压响应和RF阻抗的一种方法。
The RF self-bias of the substrate in an RF inductively coupled plasma is controlled by changing the impedance of an external circuit inserted between the substrate and the ground.
采用调节射频电感性耦合等离子体中基片电极与地之间的外部电路阻抗的方法，控制基片电极的射频自偏压。
Methods An input circuit impedance tester with metal shells that could shield part of the external interference signal was made;
方法：自制输入阻抗测试仪，采用金属外壳可屏蔽部分外部的干扰信号；
Methods An input circuit impedance tester with metal shells that could shield part of the external interference signal was made;
方法：自制输入阻抗测试仪，采用金属外壳可屏蔽部分外部的干扰信号；
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