The software support for simulation of electrical circuits has been developed for more than sixty years. Currently, the standard tools for simulation of analogous circuits are the simulators based on the open source package Simulation Program with Integrated Circuit Emphasis generally known as SPICE (Biolek 2003). There are many different applications that provide graphical interface and extended functionalities on the basis of SPICE or, at least, using SPICE models of electronic devices. The author of this paper performed a simulation of a circuit that acts as an electronic diode in Multisim and provides a comparison of the simulation results with the results obtained from measurements on the real circuit.