Systematic design of multiple-loop feedback voltage-mode filters based on CCII

The paper presents a systematic method of designing nth-order CCII (second generation current conveyor) filter with multiple-loop feedback. Various kinds of structures of lowpass filters can be obtained by this method. At same time, the synthesized filters have high impedance. With RC elements grounded, the filters are integrated conveniently. Design example of 3th-order Butterworth filter and its computer PSPICE simulation results is also given.