| 摘要 |
PROBLEM TO BE SOLVED: To provide a power supply device which can improve the stabilization of an output voltage. SOLUTION: This device is provided with a DC power supply circuit 26, which is formed on a printed circuit board 22 mounted on a metal chassis 21, a switching regulator circuit 27 which is connected to the output of the DC power supply circuit 26, and an output terminal 33 which is connected to the output of the switching regulator circuit 27. The ground of the switching regulator circuit 27 can be stabilized by forming a claw 35 at the chassis 21, and connecting the claw 35 electrically and mechanically to a ground pattern 37 between the DC power supply circuit 26 and the switching regulator circuit 27. As a result, the effects of high-frequency noise generated from a switching regulator element 30 are reduced, thus stabilization of output voltage can be improved. |
