This gaper presents two active gyrator implementations employing only two positive-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 identical to a previously presented circuit, the other is new. An FDNR (frequency-dependent negative resistor) employing only grounded capacitors is realised with the proposed configuration. An application example and simulation results are included to verify the theory. (C) 1998 Elsevier Science Ltd. All rights reserved.