A second-order bandpass IIR type digital filter, assuming that a sampling frequency is six times as large as a central frequency of a passing frequency band, a first-order input feedback coefficient b1 is set at 12n and a second-order input feedback coefficient b2 is set at 12. The transfer route storage section stores a transfer route having been set up at least on the basis of transfer destination information for the transferred object. During the second period after the first period, at least the NMOS transistor Qn1 is turned on, the storage node is connected to the ground line VSS via the program element 10, and the state of the storage node is detected by the detecting portion 11.