Abstract
Some new current feedback amplifier (CFA)-based active Resistance–Capacitance (RC) circuits are presented for the realization of an ideal grounded supercapacitor (Y(s) = s 2 D) type Frequency Dependent Negative Resistance (FDNR). The D-element is then resonated with additional RC sections to derive multifilter function circuits. The filter function have been tested for continuous resonant frequency (f 0) tunability in a range of 30 KHz ≤ f 0 ≤ 300 KHz with high quality (1 < Q < 10) response. Analysis assuming non-ideal CFA devices with finite port errors indicate that the circuits are practically active-insensitive. Experimental verification of the circuit characteristics had been carried out with both hardware implementation using Analog Devices (AD) 844 CFA-chip and by PSPICE macromodel simulation.
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