这种新型的有源滤波器，只用一个电容器、一个运算放大器和两个电阻器。
A new active filter with one capacitor, one operational amplifier and two resistors is presented.
介绍了利用一个运算放大器和两个驱动器设计的方案，具有电路结构简单，使用元器件数量少，通用性强，得到的波形足够精确。
A scheme with an amplifier and three drivers is introduced. The scheme has advantages such as simple circuit structure, few components, more versatile, and enough exact waveform.
本文提出了一个运算放大器复频域非线性模型的建立方法，并且将该方法所建立的运算放大器模型与实验测量的传递函数特性作了比较。
A nonlinear model of op amp based on Volterra series theory in complex frequency domain is proposed. The comparison of theory and experiment is given.
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