PATH DETECTION CIRCUIT

PROBLEM TO BE SOLVED: To provide a path detection circuit that can select signals by a prescribed number, in the order of starting from greater signal strength. SOLUTION: The path detection circuit 200, for selecting a prescribed path among a plurality of paths, is provided with an acquisition section 210 that acquires the intensity of the signal from the path, a storage section 252 that stores the strength of the signal, a comparison section 254 that compares the intensity of the signal stored in the storage section 252 with the intensity of the signal newly acquired by the acquisition section 210, and a signal replacement section 256 that replaces a signal in the storage section 252 with a signal newly acquired by the acquisition section 210, when the intensity of the signal newly acquired by the acquisition section 210 is higher than the intensity of the signal stored in the storage section 252.