Active R.C. synthesis with a differential amplifier.

An active R.C. structure using a fixed gain differential amplifier, two resistors and three one-ports, is presented for the realization of general voltage transfer functions including those having zeros on the positive real axis. The comparative merit of the scheme, with respect to the circuit presented recently by Natarajan (1970), is that, a smaller number of passive circuit elements is required for the synthesis of a general voltage transfer function. A few examples are included to illustrate the synthesis procedures.
In this paper, two active R.C. circuits based on a general structure using a fixed gain differential amplifier, two resistors and three R.C. one-ports for realizing general voltage transfer ratios have been proposed. The procedures for the synthesis of such transfer functions have also been presented with a few illustrative examples. The comparative merit of the circuits with respect to that of Natarajan (1970) is that the number of R.C. one-ports has been reduced from five to three, resulting in a smaller number of passive circuit elements. [ABSTRACT FROM AUTHOR]