Novel Floating General Element Simulators Using CBTA

In this study, a novel floating frequency depen- dent negative resistor (FDNR), floating inductor, floating ca- pacitor and floating resistor simulator circuit employing two CBTAs and three passive components is proposed. The pre- sented circuit can realize floating FDNR, inductor, capacitor or resistor depending on the passive component selection. Since the passive elements are all grounded, this circuit is suitable for fully integrated circuit design. The circuit does not require any component matching conditions, and it has a good sensitivity performance with respect to tracking er- rors. Moreover, the proposed FDNR, inductance, capacitor and resistor simulator can be tuned electronically by chang- ing the biasing current of the CBTA or can be controlled through the grounded resistor or capacitor. The high-order frequency dependent element simulator circuit is also pre- sented. Depending on the passive component selection, it realizes high-order floating circuit defining as V(s) = s n AI(s) or V(s) = s n BI(s). The proposed floating FDNR simulator circuit and floating high-order frequency dependent element simulator circuit are demonstrated by using SPICE simula- tion for 0.25 µm, level 7, TSMC CMOS technology parame- ters.

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