| 摘要 |
PROBLEM TO BE SOLVED: To provide an output noise reduction device capable of effectively reducing noise included in an output signal by using magnetic flux generated in a magnet core caused by a noise current.SOLUTION: A noise filter module 1 comprises a lead frame 21 to connect a conductive bar 11 to the ground potential. The conductive bar 11 is inserted in the front-back direction in a magnet core 19 provided with slits 19B, 19C. When a noise current 41 flows through the conductive bar 11, magnetic flux 43 is generated in the magnet core 19. A magnetic flux leakage 45, which occurs from the portions where the slits 19B, 19C are formed, of the magnetic flux 43 interlinks with the lead frame 21, thereby causing an induction current 47 in the lead frame 21. Thereby, a noise current 51 flowing from the conductive bar 11 to the lead frame 21 is canceled by the induction current 47.SELECTED DRAWING: Figure 3 |
