The objective of this work is to propose a reliable solution allowing restoring deficient functions of the nervous system. This solution passes by an artificial control of certain nervous information in the human body. The objective of the works presented in this paper is to propose a circuit of electric stimulation allowing the contraction of the muscle to restore its function by the generation of an electric signal. Its basic principle rests on the generation of more or less wide impulses and very specific frequency. This solution avoids a habituation of the muscle, an unwanted coetaneous ionization or a polarization of the metal prostheses.