Abstract
This research article proposes a novel floating resistor simulation circuit with electronic control facility. Proposed simulator employs two voltage differencing transconductance amplifiers (VDTAs) only. The circuit structure of presented simulator is very simple and enjoys the following beneficial properties: (i) employment of only two active elements (VDTAs), (ii) no requirement of any external resistance so a purely active implementation, (iii) electronic control of realized resistance, (iv) no need to meet any active/passive element matching condition, (v) excellent behavior under non-ideal conditions, (vi) low values of sensitivity indexes, and (vii) full utilization of used active elements. The influence of VDTA terminal parasitics on high-frequency behavior of proposed circuit is also investigated. The working of presented circuit has been confirmed by designing a low-pass filter. To validate the behavior of realized circuits, simulations in PSPICE have been performed.
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