N阶导抗函数的OTA-C电路的实现

Implementation of N Stair Immittance Function in OTA-C Circuit

提出了一种N阶导抗元件的OTA-C模拟电路综合法，分别对接地元件和浮地元件两种情况进行讨论。将实现上述元件特性的电路进行串、并联组合，可以实现任意阶的导抗函数；所有的电容元件均接地，因而提高了电路工作稳定性；仅使用一种有源器件，因而便于集成化。同时给出了电路在滤波器设计方面的应用例。

A kind of OTA-C dummy load synthesis method with N stairs immittance element is proposed. Two circuits with ground element and floating element are discussed separately. Random stairs immittance function can be implemented by series-parallel integrating of the abovementioned two circuits, with all capacitance grounded. Thus, the stability of running circuit is elevated. This system is easy to integrate because only one active element is used. Some examples are given on filter design with these circuits.