| 摘要 |
PURPOSE:To simplify a starting circuit by using a signal rectified from an AC power supply voltage as a start signal. CONSTITUTION:An AC power supply 1 is full-wave rectified by a rectifier circuit 3, converted to a smooth DC voltage by a smoothing circuit 4, this DC voltage is converted to a high frequency voltage by an inverter circuit 5, and applied to a load Z. The inverter circuit 5 has transistors Q1, Q2, the transistor Q1 is driven in a self-exciting manner, and the transistor Q2 is driven by a drive control circuit B. A rectified signal A from the power supply 1 is applied to the control circuit B, the transistor Q2 is turned ON after the power source is applied to start an oscillation. |
