| 摘要 |
PROBLEM TO BE SOLVED: To carry out the full-wave rectification smoothing of an AC voltage with a low loss. SOLUTION: A rectification element of a full-wave rectification smoothing circuit 102 comprises four n-channel MOSFETs 181, 183, 231, and 233. The MOSFET 181 is switched by a drive voltage obtained by dividing a voltage across a capacitor 141, the MOSFET 231 is switched by a drive voltage obtained by dividing a voltage across a capacitor 191, the MOSFET 183 is switched by a drive voltage obtained by dividing a voltage between joints A2 and A4, and the MOSFET 233 is switched by a drive voltage obtained by dividing a voltage between joints A1 and A4. The invention is applicable to a constant voltage DC power supply. COPYRIGHT: (C)2006,JPO&NCIPI
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