| 摘要 |
PURPOSE:To reduce power loss and to improve efficiency, by providing a power source circuit, which flows a base current to transistors constituting the inverter so that the transistors become the intermediate state between a satureted state and unsaturated state. CONSTITUTION:The base current to the transistor TR1 flows from an auxiliary power source E2 through a switch SW1. At this time, when a switch SW2 is turned ON, the base current flows from the auxiliary power siurce E2 through the switch SW2, a resistor R1, and a primary winding NP. However, when the switch SW2 is OFF, the current does not flow the resistor R2. That is, the base current to the transistors TR1 and TR2 does not flow through a secondary winding NB. Therefore, the base current is not changed by the voltage of the feedback winding NB, and the transistors TR1 and TR2 can be turned ON and OFF in the ideal state. |
