Synthesis of a Complex Prototype Ladder Filter Excluding Inductors with Finite Transmission Zeros Suitable for Fully Differential Gm-C Realization

Abstract

In this letter, an active complex filter with finite transmission zeros is proposed. In order to obtain a complex prototype ladder filter including no inductors, a new circuit transformation is proposed. This circuit is classified into the RⁱCR filter. It is shown that it includes no negative capacitors when it is obtained through a frequency transformation. The validity of the proposed method is confirmed through computer simulation.