| 摘要 |
PURPOSE:To provide a power source filter circuit in which danger of an electric shock can be avoided, a circuit can be reduced in size, weight and cost. CONSTITUTION:A power source filter circuit 20 connected between a plug socket 10 and a load 12 has a switch SW for electrically disconnecting a capacitor C2 for constituting the filter 20 from the socket 10 when supply of power from the socket 10 is interrupted. Thus, even when the socket 20 is removed while a power switch 16 remains ON, charge of the capacitor C2 is not present at the socket 10, and a fear of an electric shock does not occur. Accordingly, the capacity of the capacitor C2 of the filter can be increased. As a result, even if inductances L1, L2 are decreased, a desired filter effect is obtained. |
