New active gyrator circuit suitable for frequency-dependent negative resistor implementation

This gaper presents two active gyrator implementations employing only two p ositive-type current conveyors (CCII+) and an additional buffer, which are also realisable with two current feedback op-amps (CFOA). The circuits are constructed using four basic building blocks. One circuit is found to be id entical to a previously presented circuit, the other is new. An FDNR (frequ ency-dependent negative resistor) employing only grounded capacitors is rea lised with the proposed configuration. An application example and simulatio n results are included to verify the theory. (C) 1998 Elsevier Science Ltd. All rights reserved.