Nth-Order Current Transfer Function Synthesis Using a High-Performance Electronically Tunable Current Conveyor

In this paper a new current transfer function synthesis using CMOS high performance electronically tunable second-generation current conveyor (ECCII) is presented. All the coefficients of the transfer function can be independently tuned through the variable current gain of the ECCIIs. Based on the principles upon which the general transfer function structure was constructed, a universal current-mode filter is proposed which implements the lowpass, bandpass and highpass responses simultaneously in high output impedances. Thanks to the tunability of the ECCIIs, the parameters omega₀ and Q of the filter can be adjusted electronically. SPICE simulation results using MIETEC 0.5 mum CMOS process model are included to verify the theory