Semiconductor integrated circuit device serving as switch matrix circuit

Claim 1

A semiconductor integrated circuit device serving as a switch matrix circuit having 2m (m being an integer number) X-axis input lines and 2n (n being an integer number) Y-axis output lines with a semiconductor switch between every X-axis input line and Y-axis output line for electrically connecting selected X-axis input lines and Y-axis output lines through the selective control of said semiconductor switches, said circuit comprising: at least one fundamental unit consisting of four semiconductor switches each formed in each of the four blocks defined in a semiconductor substrate by crosswise division of rectangular sections of the substrate and insulated from one another; a pair of input common conductors each connecting two of said four input lines of said four semiconductor switches and a pair of output common conductors each connecting two of said four output lines of said four semiconductor switches; and cross-over wiring arrangements participated by a pair of control common conductors each connecting two of the control terminals of said four semiconductor switches and by one of said input or output common conductors, the choice of said one common conductor participating the cross-over wiring depending on which is at the lowest potential with respect to said control common conductors among the input and output common conductors.