Universal Active Current Mode Filter

Two new universal active current mode filters are presented.One is with three inputs and one output by using two current conveyors(CCII),at which various filtering functions such as second order low pass,high pass,band pass,notch and all pass filtering are obtained by selecting different input signal combinations.The other is with single input and three outputs by using two current conveyors and multiple outputs Operational Transconductance Amplifier(OTA).The proposed circuits are with simple structure,seperately adjustable centre frequency ω 0 and the quality factor Q ,all grounded passive components and low passive sensitivities.Theoretical analysis and computer simulation indicate that the proposed circuits are effective.