Invention Application
- Patent Title: Low-pass filter capable of preventing unnecessary electromagnetic coupling
- Patent Title (中): 低通滤波器,能够防止不必要的电磁耦合
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Application No.: US11521756Application Date: 2006-09-15
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Publication No.: US20070103256A1Publication Date: 2007-05-10
- Inventor: Hiroyuki Ishiwata
- Applicant: Hiroyuki Ishiwata
- Assignee: ALPS ELECTRIC CO., LTD.
- Current Assignee: ALPS ELECTRIC CO., LTD.
- Priority: JP2005-321074 20051104
- Main IPC: H03H7/01
- IPC: H03H7/01

Abstract:
A plurality of conductive patterns constituting first, second, and third inductors are formed in a multi-layer wiring board. A fifth dielectric layer is disposed between second to fourth dielectric layers having the first inductor and a seventh dielectric layer having the second inductor. First and second electrode layers are disposed facing each other across the fifth dielectric layer so as to constitute a capacitor. The capacitor is disposed between the first and third inductors and the second inductor. The first electrode layer, i.e., one electrode of the capacitor, is a ground layer.
Public/Granted literature
- US07423500B2 Low-pass filter capable of preventing unnecessary electromagnetic coupling Public/Granted day:2008-09-09
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