Synthetic Grounded Lossy Inductance Simulators Using Single VDIBA

This work describes two circuit realizations for actively variable simulated lossy inductors (series R-L type and parallel R-L type). Both of the described inductors are simple and resistor-less structures, since they contains only a single active device called voltage differencing inverting buffered amplifier (VDIBA), one grounded capacitor, and one NMOS transistor as a voltage-controlled resistor. The simulated equivalent resistances and inductances of the proposed synthetic lossy inductors can be tuned electronically. The non-ideal transfer gain and the parasitic impedances existing at the VDIBA terminals are taken into account. Simulations with TSMC 0.25-mu m CMOS technology are also provided, which demonstrate the utility as well as the workability of the proposed simulators.