The main objective of this paper is to realize a Robust-Model Predictive Control (RMPC) to a dynamical inverse proportional system. Inverse proportional systems are presented in some systems involving electronic sensors, among others. However, in modern literature, an RMPC design could not be found for this type of system. Hence, we implement an inverse proportional system using the Van der Pol system and a low-pass filter stage. When designing the RMPC, an inverse proportional system can be viewed as a linear perturbed system with a negative gain on the canal input signal. This is because the RMPC is a statement on the discrete-time framework. Numerical experiments support our main contribution.