為了得到負阻值性質的電路元件，采用正電阻與運算放大器進行搭建的方法。對搭建構成的負電阻和負電阻的串并聯連接以及負電阻和正電阻的串并聯連接進行了理論推導和Multisim仿真實驗，兩種方法的結果一致且證明搭建構成的電路元件具有負電阻的特性。給出了一個負電阻的應用實例。得出了在存在負電阻的電阻串并聯等效變換中，負電阻的處理方法與正電阻一致的結論。

　　Abstract:

　　In order to get the circuit elements with negative resistance properties， combined with positive resistance and operational amplifiers. To do the theoretical derivation and multisim simulation experiments for the series and parallel connection between negative resistors and the connection between negative resistance and positive resistance. Results of the two methods are consistent. And proof of the device has negative resistance properties. The conclusion that the equivalence transformation of circuits with negative resistors is the same as that of the circuits with only positive resistors is drawn. The instance of application of negative resistor is offered.