任意阶OTA-C多功能滤波器的设计。

Design of Arbitrary Order OTA-C Multifunction Filters

提出了一种新的任意阶运算跨导放大器——电容(OTA-C)多功能滤波器的设计方法。通过将n阶传递函数分解为n+1个一阶传递函数,导出了任意阶传递函数OTA-C实现电路。适当选择各输入端电压,可实现低通、高通、带通、带阻、全通等滤波功能。文中给出了6阶滤波器设计实例,PSPICE仿真结果与理论分析相吻合,验证了设计方法的可行性。

This paper presents a new general design method for arbitrary order operational transconductance amplifiers and capacitors （OTA-C） multifunction filters. A OTA-C configuration that can be used to realize arbitrary order transfer function is obtained by the decomposition of a nth-order transfer function into n＋1 first-order transfer functions. The lowpass, highpass, bandpass, bandstop and allpass filters are realized by selecting input voltage reasonably. A 6^th-order filter is designed. PSPICE simulation results are obtained to verify the theoretical analysis and to demonstrate its effectiveness.