| 摘要 |
PROBLEM TO BE SOLVED: To perform exact fixing temperature control by exactly acquiring the zero cross point even when periodic noise goes into a commercial power source.SOLUTION: A CPU 3 determines whether the signal level of a zero cross signal output by a zero cross signal generating circuit 2 matches with the signal level held by an RAM 9 (S312) within a predetermined time after a hardware zero cross signal acquisition section 7 acquires a hardware zero cross signal 4 (S303 Y) (S306). |
