高阶OTA—C滤波器设计

Design of High-Order OTA-C Filters

本文提出了高阶OTA—C滤波器设计的新方法.该法是以无源LC梯型网络为原型,采用节点电压仿真技术设计高阶滤波器.这种方法不仅适用于低通梯型滤波器的有源仿真,而且也适用于高通和带通梯型滤波器设计,具有更广泛的适用性.利用这种方法,我们得到了包括全极点和有限零点的高通、带通和低通梯型滤波器.

New method for designing high-order OTA-C filters is presented. The technique is based on the nodal voltage simulations and uses passive LC ladder network as prototype. The method is suitable for not only the active simulation of lowpass ladder filter but also the design of highpass and bandpass filter. By using the method, we obtain highpass, bandpass and lowpass filters of all polar points and zeros of finite numbers.