DESIGNING METHOD FOR SIGNAL PROPAGATION CIRCUIT

PROBLEM TO BE SOLVED: To provide a designing method for a signal propagation circuit which facilitates optimum designing minimizing a delay time. SOLUTION: This designing method for the signal propagation circuit is a designing method which inserts buffers into plural stages in a signal wire having plural branches. The buffers which are substantially equal in buffer size and fan-out number are inserted between the input position of an input-stage buffer and the final position of the output-side wire of the final-stage buffer so that the wiring distances between the respective buffers and the output-side wiring distance of the output-stage buffer are substantially equal to one another; and the buffer size and the number of buffer stages which minimize the signal propagation delay time at the final position are independently selected according to specific calculation expressions.