Current Feedback Operational Amplifier Based Grounded Inductance Simulator Topologies

Inductance Simulators can be used to implement phase shifting circuits, active filters, oscillators, cancellation of parasitic elements. In this work, three inductor simulators employing only a single active circuit current feedback operational amplifier, and three passive components have been proposed. The aim of this work, is to show new inductance simulators working the low frequencies using minimum number of active and passive elements. The first topology designed for series lossy inductance consists of two resistors and inductors (R1+R2+L), the second topology consists of (-R-L) and the third topology is lossles negative inductance if the two resistors are equal (R2=R3). To demonstrate the performance of the proposed simulated inductors, passive RLC filter has been used with AD844 CFOA Spice model. The simulations performed with the LTSpice program agree with the theoratical analysis