Systematic Design of Multiple-loop Feedback Differential Current-mode Filters Based on CFBCCII

This paper presented a circuit named current controlled fully balanced second generation current conveyor(CFBCCⅡ).CFBCCⅡ has a pair of differential Y terminals,a pair of differential X terminals and two pairs of Z terminals.On the basis of CFBCCⅡ,this paper presentsed a systematic method of designing differential nth-order filters with multiple-loop feedback.Different feedbacks construct different low-pass filters in this method.All the filters have the property of current controllability and have no limitation of the orders.The produced nth-order filters are constructed by n CFBCCⅡs and 2n capacitances,and are easy to integrate because the passive capacitances are all grounded.