| 摘要 |
PROBLEM TO BE SOLVED: To reduce ripple included in a booster voltage from a booster circuit 2 to be supplied to a regulator 3. SOLUTION: A resistance element 1 to be determined from a wiring resistance 5 to a smoothing capacitance C1 of a booster circuit 2 and a desired ripple value at the feeding point of a booster voltage is arranged between a booster circuit output (A point) and a booster voltage feeding point (B point), so that ripple components included in the booster voltage can be pressure-divided and attenuated. Thus, it is possible to finally satisfy the requested ripple specification of the output voltage of a regulator 3. COPYRIGHT: (C)2008,JPO&INPIT
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