| 摘要 |
PROBLEM TO BE SOLVED: To provide a switching power circuit which is highly effective in noise reduction, without having to add new components. SOLUTION: A transformer 1 is provided with a primary winding 2 and a secondary winding 3. A center tap 4 of the primary winding 2 is connected with one end of a direct-current power supply 5. Both the ends of the primary winding 2 are connected with the drains of transistors Q1 and Q2, comprising switching elements, respectively. The sources of the transistors Q1 and Q2 are connected with the other end of the direct-current power supply 5. The gates of the transistors Q1 and Q2 are connected with one-side ends of gate resistors R2 and R2, respectively. The other-side ends of the gate resistor R1 and R2 are connected with a control circuit 6, and the resistance value of the gate resistor R2 is higher than the resistance value of the gate resistor R1. |
