基于相似矩阵的OTA全集成有源滤波器的设计

Full-Integrated OTA Active Filter Design Based on Similar Matrix

研究了全集成连续时间有源滤波器的设计方法,给出了基于实对称相似矩阵理论的跨导运算放大器(OTA)有源滤波器设计方法.由于该方法基于双端接载的LC梯形原型和一般网络理论,所设计的电路主要由OTA和接地电容组成,不易受分布电容的影响,具有稳定性好、灵敏度低及集成度高等特点.给出的设计实例显示该方法可用于实现片上系统集成.

Full-integrated operational transconductance amplifier(OTA)active filter design method is studied and a practical procedure to derive the OTA active filter from the prototype of doubly terminated LC passive filter is presented. The design method is based on similar diagonal matrix and common network theory. The obtained active filter is composed of OTA and ground capacitances and it is convenient for integration. It also has high stability and low sensitivities. An example is given and the simulated results show that the proposed method is suitable for full-integrated monolithic filters realization.