Realization of current-mode filters using single FTFN

A new configuration using single four-terminal floating nullor (FTFN) is presented to realize various kinds of current-mode filters. These current-mode filters have high output impedance, so they can be cascaded without additional buffers. The proposed filters in this paper require less passive components than the previous ones (Liu 1995). Moreover, the resultant current-mode filters will be insensitive to the current tracking error of an FTFN. Experimental results confirm that the theoretical analyses are obtained.