| 摘要 |
PROBLEM TO BE SOLVED: To perform an appropriate frequency change.SOLUTION: A power supply circuit includes: a first and a second switching circuit 10a, 10b connected in parallel between an input terminal and an output terminal; a control signal generation unit 20 which controls to switch on and off the first and second switching circuits, respectively, to generate a first and a second control signal of mutually different phases; a frequency switching unit which switches the frequency of the first control signal after switching the frequency of the second control signal; and a phase change unit which changes the phase of the second control signal when there is a first interruption by which the first control signal is switched on after the frequency switching unit switches the frequency of the second control signal.SELECTED DRAWING: Figure 9 |
