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提出了一种基于多输出电流控制传送器(CCCII±)的n阶低通滤波器设计方法。所设计的n阶低通滤波器由n个CCCII±、n个电容和电流加权网络组成,该电流加权网络对各个CCCII±单元的输出电流进行组合,得到所需的系统输出电流。只需通过对各电容和加权系数的适当调整和组合可得所需输出电流,实现了各种低通电流滤波器。这种设计方法简单,易于集成,有很大的实际意义。经过对3阶Butterworth、Chebyshev、椭圆低通滤波器的设计,结果与理论计算值吻合,验证了该种方法的正确性。
An n-th order low-pass filter design method based on multi-output current control transmitter (CCCII ±) is proposed. The designed n-th order low-pass filter consists of n CCCII ±, n capacitors and a current weighted network that combines the output currents of the individual CCCII ± cells to obtain the desired system output current. Just through the proper adjustment of the capacitance and weighting coefficients and combinations of the required output current, to achieve a variety of low-pass current filter. This design method is simple, easy to integrate, of great practical significance. After the third-order Butterworth, Chebyshev, elliptic low-pass filter design, the result is in good agreement with the theoretical calculation, which verifies the correctness of the method.