There is a general method to simulate LC ladder filters, using equivalent inductances by GIC's. But, when an LPF is realized by this approach, the problems arise, such as DC bias instability and the influence of induced noise.
First, a prototype LC ladder filter, which is obtained by connecting inductors in parallel with the input and output resistors of a conventional doubly terminated LC filter, is proposed, and the active simulation of this LC filter by GIC's, is presented. Second, a fifth-order elliptic LPF is designed. The measured transfer response shows a good agreement with the theoretical value. Finally, it is shown that the sensitivity of the proposed circuit is lower than that of the conventional circuits using GIC's.