And, S130 is an operation of determining whether this process is finished or not, and proceeding to the S110 when the process is not finished and proceeding to FINISH when the process is finished.FIG. 4 is a block view illustrating an oscillation controller as shown in FIG. 1.Referring to FIG. 4, the oscillation controller 220 includes a first comparator 221 including a reverting terminal for rece