Simultaneous realization of two admittance functions using one operational amplifier

Using a two-port active network containing one ideal differential input and output operational amplifier, realization procedures are developed for simultaneous realization of any pair of the four short-circuit admittance parameters. The only stipulation on the parameters is that they must be real rational functions in the complex frequency variable. Experimental verification of one of the procedures is presented. The procedures are generalized to the port case in order to show that one amplifier and an network are sufficient for the simultaneous realization of any N admittance parameters provided one parameter is prescribed from each column (row) of the admittance matrix of the active port network, but proof appears in (10).