A semiconductor integrated circuit includes one or more neuron MOS transistors on a substrate. The MOS transistor comprises a semiconductor region of one conductivity type, source and drain regions of opposite conductivity type disposed in this region, floating gate disposed on an insulating film between the source and drain regions, and a plurality of input coupling electrodes making capacitive coupling with the floating gate through the insulating film, wherein the floating gate is connected to at least one switching device. <IMAGE>
SEMICONDUCTOR INTEGRATED CIRCUIT