| 摘要 |
PROBLEM TO BE SOLVED: To miniaturize a resonance converter while suppressing AM radio noise.SOLUTION: A switching power source has means 4 for setting a target value, means 3 for measuring a control target 2, means 5 for performing erroneous amplification on the deviation between the control target and the target value, means 6 for determining an operation amount from the amplified error, frequency variation determining means 7 for determining any one of frequency increasing, decreasing and maintaining operations according to the operation amount, frequency determining means 8 for determining the frequency upon the determination so that the frequency is a multiple of a predetermined frequency, and means 9 for generating a driving signal from the operation amount and the determined frequency, frequency modulation and other modulation methods are combined, and the frequency modulation is discretely executed.SELECTED DRAWING: Figure 1 |
