Floating Impedance Simulator Realization

This paper presents the floating impedance function simulator using flipped voltage follower-based differential voltage to current converter (DVTC) along with three passive elements. With the proper selection of the three passive components, the floating inductor, capacitor and frequency- dependent negative resistor (FDNR) can be realized. The realized equivalent impedance value of the proposed simulator can be controlled conveniently by changing the passive element values. A second-order bandstop filter and third-order lowpass filter are designed using the proposed simulators as application examples. To verify the workability of the proposed circuit, simulation results are confirmed through PSPICE program using 0.25-μm CMOS process parameters from TSMC (Taiwan Semiconductor Manufacturing Company).