Generalization of a theorem for replacing CCIIs by CFOAs in current-mode circuits

A current feedback op-amp (CFOA) has the advantage that feedback structures in current-mode circuits are more easily devised because the voltage buffe r at the output of the CFOA does not load the output of the integral positi ve, second-generation current conveyor (CCII+) that constitutes part of the CFOA. In this paper, the changes on the current mode transfer function of a linear circuit composed of a subnetwork N connected to a CCII+ are determ ined when the CCII+ is replaced by a CFOA and a feedback component is conne cted from the output of the CFOA to an independent node of N. Two applicati ons of the results are provided. A new theorem is then presented which gene ralizes the results. This theorem should be useful for the comparison, synt hesis, and improvement of linear current-mode signal processing circuits.