| 摘要 |
<p>A power switch circuit 10 includes a pulse width modulation (PWM) control circuit 11 having a first frequency control terminal DR1 and a second frequency control terminal DR2 for outputting predetermined frequency signals, a first switch circuit 12, a second switch circuit 13, a first resistor R1 connected between the first frequency control terminal and the first switch circuit, a second resistor R2 connected between the first frequency control terminal and the second switch circuit, a first filtering circuit 14 having a third resistor and a first capacitor, and a second filtering circuit 15 having a fourth resistor and a second capacitor. A first terminal of the first capacitor is connected to the first switch circuit and a second terminal of the first capacitor is grounded via the third resistor. A first terminal of the second capacitor is connected to the second switch circuit and a second terminal of the second capacitor is grounded via the fourth resistor.</p> |
