Realization of eighth order current mode Butterworth characteristics using Multioutput Operational Floating conveyors and grounded components

This paper presents an active realization of an eighth order current mode Butterworth filter function using Multioutput Operational Floating conveyors (MOOFCs) and grounded passive components. The proposed realization is based on cascading a new low component single input multi output (SIMO) current mode universal biquadratic filter (UBF). The UBF is constructed employing only two MOOFCs, four grounded components, that lead to simple structure, easy to design and suitable for IC fabrication. The proposed UBF can realize all standard biquadratic responses without any matching conditions and has current outputs at a high impedance terminal, which enable easy cascadablity. The proposed filter has the advantages of minimum requirement of active and passive component count, low sensitivity, and high performance. The performance of the filter is verified through PSPICE simulation using low supply voltage of 0.75 volts.