| 摘要 |
PROBLEM TO BE SOLVED: To provide a filter circuit 10 for power supply capable of effectively filtering and eliminating various noise components included in a direct current supplied from a direct current power supply 11 and noise components generated from a load 12. SOLUTION: This filter circuit is provided with a first inductor 1 and a second inductor 2 serially connected between an input terminal 8 and an output terminal 9, a first capacitor 3 connected between the input terminal 8 and a reference potential point, a second capacitor 4 connected between the connection point of the first inductor 1 and the second inductor 2, and the reference potential point, a third capacitor 5 connected between the output terminal 9 and the reference potential point, and a first resistor 6 and a second resistor 7 of a small resistance respectively connected parallelly to the second inductor 2.
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