  We discuss a new approach to describe mesoscopic systems, based on the ideas
of quantum electrical circuits with charge discreteness. This approach has
allowed us to propose a simple alternative descriptions of some mesoscopic
systems, with interesting results for some mesoscopic systems. In his work, we
show that the application of the Bohr-Sommerfeld quantization rules to the
Quantum $LC$ circuit with discrete charge allows us to easily reproduce
previous results.
