本論文提出可用PSpice模擬FTFN ±（正負型四端點浮接式nullors）的八種等效電路。而此新的負型FTFN等效電路，較先前已發表之等效電路為簡單、不佔記憶體空間且不費時。同時也會提出正型FTFN等效電路。並提出一個由FTFN ±所組成的網路，將其模擬結果與理論分析做比較。

　　　　　In this paper, eight new equivalent circuits for the FTFN ± in PSPICE simulator are proposed. The new equivalent circuits for FTFN- are simpler and occupy fewer memories as well as take less time than the previous published equivalent circuit. The equivalent circuits for FTFN + are also proposed in this paper. The simulation results of FTFN ± networks using the equivalent circuits are compared with the theoretical analyses.