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。
The active filter acts as an infinite impedance to the external for the fundamental frequency and as a low resistor for harmonic frequencies.
方法：基于C8051F 020和AD 9832的核心控制电路通过动态阻抗匹配法使系统输出最大超声波功率。
Through dynamic impedance matching by kernal control circuit based on C8051F020 and AD9832, the maximum output of ultrasound power is produced.
本文对四电极系统中恒电位器、恒电流器、阻抗测量系统和计算机控制的测量系统的电路原理作了介绍。
The principles of the electronic circuits of pontentiostat, galvanostat, impedance measuring system and the computer-controlled measuring system arc introduced.
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。
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.
其中，上述一触控板上特别设计有一阻抗电路，及一处理信号的控制芯片，并与该触控板有电性连接；
The touch-sensitive panel is specially provided with an impedance circuit and a control chipset for signal processing, which are electrically connected with the touch-sensitive panel.
还介绍了变阻抗电流控制的电路原理和应用范围。
The circuitous philosophy and the application range of rheostatic current control are also introduced.
采用DSP构建合成阻抗电路替代传统的压电分流阻尼电路进行振动控制。
The DSP circuit of synthetic impedance is adopted instead of piezoelectric shunting damping circuit.
本文设计了一个阻抗可变的输出驱动器，并配套地设计了自适应的阻抗控制电路，能在电路工作中实时调节输出阻抗。
This paper describes the design of a variable impedance output buffer, and its adaptive control circuit. It can automatically adjust the impedance of output buffer in real-time.
本文设计了一个阻抗可变的输出驱动器，并配套地设计了自适应的阻抗控制电路，能在电路工作中实时调节输出阻抗。
This paper describes the design of a variable impedance output buffer, and its adaptive control circuit. It can automatically adjust the impedance of output buffer in real-time.
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