Actively Floating Lossy Inductance Simulators Using Voltage Differencing Buffered Amplifiers

Two simple topologies for the simulation of floating lossy inductances are presented, which realize series and parallel RL impedances employing two voltage differencing buffered amplifiers (VDBAs) as active components. Each of the proposed circuit topologies consists of one resistor and one capacitor, which employs canonical passive components. The equivalent values of the simulated resistance and inductance can be tuned electronically by means of the external biasing currents of the VDBAs. Non-ideal gain effects of the VDBA on the proposed circuits are carried out. The performance of the proposed floating inductors is demonstrated on both a standard second-order RLC low-pass filter and a parallel resonant circuit. Laboratory experiments using commercially available ICs are included to verify the workability of the circuits. Several computer simulations with PSPICE program are also drawn together with theoretical ones for circuit performance verification.