| 摘要 |
PROBLEM TO BE SOLVED: To obtain high-frequency voltage from non-filtered DC voltage with a switching means and provide low distortion of input current while the peak value of the non-filtered DC voltage is high. SOLUTION: An output control circuit 23 consists of a filter 31, resistors R1, R2, a capacitor C1, an error amplifier 32, a DC constant voltage source 33, an oscillator 34, a comparator 35, and a driving circuit 36. The output control circuit 23 supplies respective oscillating signals a1, b1 into switching means 21, 22 on the charging side and discharging side to turn on and off alternately the switching means 21, 22 on the charging side and the discharging side, and control the on-duty ratio of the switching means 21, 22 on the charging side and the discharging side, so that peak value detected voltage from a peak value detection circuit 28 may approach a constant value. |
