WO2011021339A1 - 給電線構造及びそれを用いた回路基板、emiノイズ低減方法 - Google Patents
給電線構造及びそれを用いた回路基板、emiノイズ低減方法 Download PDFInfo
- Publication number
- WO2011021339A1 WO2011021339A1 PCT/JP2010/004038 JP2010004038W WO2011021339A1 WO 2011021339 A1 WO2011021339 A1 WO 2011021339A1 JP 2010004038 W JP2010004038 W JP 2010004038W WO 2011021339 A1 WO2011021339 A1 WO 2011021339A1
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- WIPO (PCT)
- Prior art keywords
- wiring
- power supply
- reference potential
- feed line
- floating
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0213—Electrical arrangements not otherwise provided for
- H05K1/0216—Reduction of cross-talk, noise or electromagnetic interference
- H05K1/0228—Compensation of cross-talk by a mutually correlated lay-out of printed circuit traces, e.g. for compensation of cross-talk in mounted connectors
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/16—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor
- H05K1/162—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor incorporating printed capacitors
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09209—Shape and layout details of conductors
- H05K2201/09218—Conductive traces
- H05K2201/09236—Parallel layout
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09209—Shape and layout details of conductors
- H05K2201/09218—Conductive traces
- H05K2201/09245—Crossing layout
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09209—Shape and layout details of conductors
- H05K2201/09654—Shape and layout details of conductors covering at least two types of conductors provided for in H05K2201/09218 - H05K2201/095
- H05K2201/09781—Dummy conductors, i.e. not used for normal transport of current; Dummy electrodes of components
Definitions
- the present invention relates to a feeder line structure, a circuit board using the same, and an EMI noise reduction method, and more particularly, to a feeder line structure capable of suppressing EMI (Electro-Magnetic Interference) noise, a circuit board using the same, and EMI noise reduction. It is about the method.
- EMI Electro-Magnetic Interference
- FIG. 8 shows a case of a communication apparatus such as an exchange, an IP (Internet Protocol) switch, and a router.
- a communication apparatus such as an exchange, an IP (Internet Protocol) switch, and a router.
- the station power supply or commercial power supply 1 is supplied with power to the product / device 3 which is a communication device via the external power supply cable 2.
- the feed power is supplied to the power supply circuit 6 through the filter circuit 5, and is further mounted on the electronic circuit board (printed board) 4 through the internal feed line 7 and the internal feed connector 8. Power is supplied to the electronic circuit board (printed circuit board) 4 as 12 operating power sources.
- a plurality of electronic circuits 12, an on-board power supply 11, and a filter circuit 9 are mounted on the electronic circuit board 4.
- the power supply voltage supplied from the station power supply or the commercial power supply 1 via the power supply circuit 6 is different from the voltage required by the electronic circuit 12, and is referred to as a primary power supply here.
- the primary power supply is supplied to the electronic circuit 12 by the on-board power supply 11 as a voltage necessary for the operation of the electronic circuit 12.
- the power supplied to the electronic circuit 12 is referred to as a secondary power supply.
- the primary power supply is supplied from the internal power supply connector 8 to the input part of the onboard power supply 11 via the primary power supply line 10, and the secondary power supply is supplied from the output part of the onboard power supply 11 to the secondary power supply line 13. It is supplied to each electronic circuit 12 via.
- the primary power source and the secondary power source are electrically separated from each other so that the high frequency noise 102a due to the operation of the electronic circuit supplied by the secondary power source is not transmitted to the primary power source.
- EMI noise (EMI radiation) 101 is generated via the internal feed line 7 and the external feed cable 2. Therefore, a filter circuit 9 such as a capacitor or a common mode choke coil is inserted in the middle of the primary power supply line 10 to suppress this high frequency noise.
- filter circuits using such impedance elements include Patent Documents 1 and 2.
- the technology for providing the filter circuit 9 shown in FIG. 8 and the technologies such as Patent Documents 1 and 2 require that filter components be mounted on a circuit board, which has difficulty in circuit mounting and reduces the size of the device. Not only is it a factor to prevent it, but it is not a good idea in terms of cost. Further, in the technique of Patent Document 3, since the area of each overlapping portion of the power supply wiring and the reference potential line is expanded, the occupied area on the circuit board is increased, and there is a difficulty in circuit mounting. .
- An object of the present invention is to provide an EMI countermeasure by making it possible to suppress noise that circulates from an electronic circuit to a primary power supply without using a circuit component such as a choke coil or a capacitor and without increasing the occupied area on the circuit board. It is an object of the present invention to provide a feed line structure, a circuit board using the same, and an EMI noise reduction method.
- the power supply line structure according to the present invention is provided in an insulator, and forms a pair of power supply lines, a reference potential wiring, and both the power supply wiring and the reference potential wiring in the insulator. And three-dimensionally intersecting and having a potential floating wiring.
- a circuit board includes an electronic circuit, a power supply circuit that supplies power for the electronic circuit, a power supply wiring and a reference potential wiring that constitute a power supply line on the input side to the power supply circuit, and the power supply wiring. It includes a wiring that is three-dimensionally crossed with respect to both the reference potential wiring and a potential floating state.
- the EMI noise reduction method includes a three-dimensional crossing with respect to a power supply wiring, a reference potential wiring, and both the power supply wiring and the reference potential wiring forming a pair of power supply lines in an insulator. Thus, a wiring in a floating state is formed, and power is supplied to the electronic circuit provided on the insulator through the power supply wiring and the reference potential wiring.
- the present invention by providing the wiring so as to straddle the power supply wiring and the reference potential wiring in the primary-side power supply wiring, the characteristic impedance of the power supply wiring is partially reduced, and noise that propagates on the power supply wiring is reduced. Since negative reflection is generated, there is an effect that noise propagation can be suppressed without using circuit components.
- FIG. 1 is a perspective view of a first embodiment of the present invention. It is a top view, a front view, and a side view of the first embodiment of the present invention. It is a figure which shows the TDR (Time Domain Reflectometry) characteristic in the example of FIG.1 and FIG.2. In the example of FIG.1 and FIG.2, it is a figure which shows the insertion loss characteristic when the width
- TDR Time Domain Reflectometry
- FIG. 1 is a perspective view thereof
- FIG. 2 is a plan view, a front view, and a side view thereof.
- a part of an insulator (dielectric) 40 as a circuit board is cut out.
- the dielectric 40 is shown as a transparent body for convenience.
- a power wiring 41 and a reference potential (GND) wiring 42 are provided in parallel in a layer of a multilayer printed board (shown as a dielectric 40), that is, on the same plane.
- the power supply line 41 and the reference potential line 42 constitute the primary side feed line 10 described with reference to FIG. In FIGS. 1 and 2, some of them are enlarged.
- the power supply wiring 41 and the reference potential wiring 42 are parallel to each other, and need not be particularly parallel as long as the feed line can be configured.
- the “wiring 43” is provided so as to overlap the power supply line, that is, the power supply wiring 41 and the reference potential wiring 42. It is assumed that the wiring 43 is in a floating state in potential that is not connected to any of them. Therefore, the wiring 43 is referred to as a floating wiring 43.
- the floating wiring 43 is formed as an inner layer in a dielectric body on a plane different from the plane on which the power supply wiring 41 and the reference potential wiring 42 are formed, crossing these both three-dimensionally.
- FIG. 3 shows the TDR (Time Domain Reflectometry) characteristics of the power supply lines shown in FIGS.
- Reflection coefficient (Z2-Z1) / (Z2 + Z1) Holds.
- Z2 corresponds to a portion provided across the floating wiring 43, indicating that the reflection coefficient is negative.
- FIG. 4 shows the insertion loss (S21) characteristics when the width W of the floating wiring 43 is changed. It can be seen that the cutoff frequency of the feeder line can be controlled by controlling the wiring width W in this way.
- the radiated electric field intensity of EMI is 30 MHz or more. Judging from the insertion loss characteristics shown in FIG. 4, this band can be suppressed by further widening the width W from 20 mm.
- FIG. 5 is an analysis of the response by applying a Gaussian pulse, assuming noise propagating in the feed line according to the present invention. It shows that negative reflection occurs due to the low impedance of the floating wiring 43, and the passing waveform level of the applied Gaussian pulse can be suppressed.
- FIG. 6 is a perspective view thereof
- FIG. 7 is a plan view, a front view, and a side view thereof. 6 and 7, the same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals.
- FIGS. 6 and 7 also show a state in which a part of the dielectric 40 as a circuit board is cut off, as in FIGS. 1 and 2 showing the previous embodiment.
- the dielectric 40 is shown as a transparent body for convenience.
- the power supply wiring 41 and the reference potential wiring 42 are formed on the same plane in the dielectric 40. However, in this example, the power supply wiring 41 and the reference potential wiring 42 are provided. The case where it forms in a mutually different plane (layer) is shown. Also in this case, the floating wiring 43 is formed so as to straddle the power supply wiring 41 and the reference potential wiring 42 so as to cross three-dimensionally.
- the stacking order of each wiring layer is the power wiring 41, the floating wiring 43, and the reference potential wiring 42 in order from the upper layer, but is not limited thereto.
- the primary side power source (the input side of the on-board power source 11 in FIG. 8) assumed in the embodiment of the present invention is a high voltage such as ⁇ 48 volts that is generally used in communication devices and the like. Therefore, it is necessary to electrically separate from the electronic circuit 12 on the secondary side. From the viewpoints of safety and prevention of noise inflow, the signal power supply and GND (reference potential) of the electronic circuit cannot be used for the wiring 43, and therefore the potential is brought into a floating state.
- the wiring 43 is grounded to the frame GND of the apparatus housing instead of being in a floating state.
- the design becomes complicated and not a good idea, and the object of the present invention is to solve the simplicity of mounting. It will not be possible.
- a low-pass filter is configured by providing a floating wiring that realizes a low impedance in the middle of the primary side feed line.
- the high frequency noise which wraps around from the electronic circuit of a secondary side power supply can be suppressed, and the EMI radiation radiated
- a filter can be configured simply by providing a wiring pattern in a simple floating state on the electronic circuit board, and cost reduction in product development can be realized.
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Structure Of Printed Boards (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
Description
反射係数=(Z2-Z1)/(Z2+Z1)
が成り立つ。図1、2に示した給電線路においては、Z2がフローティング配線43を跨って設けた部分に相当し、この反射係数が負性であることを示している。
2 外部給電ケーブル
3 製品・装置
4 電子回路基板(プリント基板)
5、9 フィルタ回路
6 電源回路
7 内部給電線路
8 内部給電コネクタ
10 1次側(電源の入力側)給電線路
11 オンボート電源
12 電子回路
13 2次側(電源の出力側)給電線路
40 絶縁体(誘電体)
41 電源配線
42 基準電位(GND)配線
43 フローティング配線
Claims (7)
- 絶縁体中に設けられ、対になって給電線を形成する電源配線、基準電位配線と、
前記絶縁体中に前記電源配線と前記基準電位配線との両者に対して立体的に交差して設けられ、電位的にフローティング状態の配線と、
を備える給電線構造。 - 前記フローティング状態の配線は、前記電源配線と前記基準電位配線とを跨いで設けられていることを特徴とする請求項1記載の給電線構造。
- 前記電源配線と前記基準電位配線とは同一平面にて形成され、前記フローティング状態の配線は、前記同一平面とは異なる面に形成されていることを特徴とする請求項1または2記載の給電線構造。
- 前記電源配線と前記基準電位配線とは異なる平面に形成され、前記フローティング状態の配線は、前記平面の各々とは異なる平面に形成されていることを特徴とする請求項1または2記載の給電線構造。
- 前記給電線は、前記絶縁体上に設けられた電子回路用の電源回路の入力側の給電線として用いられることを特徴とする請求項1~4いずれか記載の給電線構造。
- 電子回路と、
前記電子回路のための電源を供給する電源回路と、
前記電源回路への入力側の給電線を構成する電源配線及び基準電位配線と、
前記電源配線と前記基準電位配線との両者に対して立体的に交差して設けられ、電位的にフローティング状態の配線とを含むことを特徴とする回路基板。 - 絶縁体中において、対になって給電線を形成する電源配線、基準電位配線、及び、前記電源配線と前記基準電位配線との両者に対して立体的に交差するように、電位的にフローティング状態の配線を形成し、
前記電源配線及び前記基準電位配線を介して、前記絶縁体上に設けられた電子回路に電源を供給するEMIノイズ低減方法。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/387,566 US9532442B2 (en) | 2009-08-19 | 2010-06-17 | Feed line structure, circuit board using same, and EMI noise reduction method |
JP2011527559A JP5472305B2 (ja) | 2009-08-19 | 2010-06-17 | 給電線構造及びそれを用いた回路基板、emiノイズ低減方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009-189633 | 2009-08-19 | ||
JP2009189633 | 2009-08-19 |
Publications (1)
Publication Number | Publication Date |
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WO2011021339A1 true WO2011021339A1 (ja) | 2011-02-24 |
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PCT/JP2010/004038 WO2011021339A1 (ja) | 2009-08-19 | 2010-06-17 | 給電線構造及びそれを用いた回路基板、emiノイズ低減方法 |
Country Status (3)
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US (1) | US9532442B2 (ja) |
JP (1) | JP5472305B2 (ja) |
WO (1) | WO2011021339A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019096857A (ja) * | 2017-11-24 | 2019-06-20 | 廣達電脳股▲ふん▼有限公司 | 戻り経路における低減された放射を有する高速差動トレース |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20180184516A1 (en) * | 2015-07-08 | 2018-06-28 | Nec Corporation | Printed wiring board |
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JP2001339169A (ja) * | 2000-05-29 | 2001-12-07 | Kyocera Corp | 多層配線基板 |
JP2003204044A (ja) * | 2001-10-25 | 2003-07-18 | Mitsubishi Electric Corp | 薄膜磁性体記憶装置 |
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JPS6150183A (ja) * | 1984-08-20 | 1986-03-12 | 富士通株式会社 | 表示装置 |
JP2551837B2 (ja) * | 1989-03-10 | 1996-11-06 | 松下電子工業株式会社 | 半導体装置 |
JPH0430531A (ja) * | 1990-05-28 | 1992-02-03 | Sanyo Electric Co Ltd | 半導体集積回路 |
JP3226331B2 (ja) | 1992-06-23 | 2001-11-05 | 松下電工株式会社 | 無電極放電灯点灯装置 |
US5838582A (en) * | 1996-10-07 | 1998-11-17 | International Business Machines Corporation | Method and system for performing parasitic capacitance estimations on interconnect data within an integrated circuit |
JP3626354B2 (ja) * | 1998-09-21 | 2005-03-09 | 株式会社東芝 | 配線基板 |
US6483714B1 (en) * | 1999-02-24 | 2002-11-19 | Kyocera Corporation | Multilayered wiring board |
US6438735B1 (en) * | 1999-05-17 | 2002-08-20 | Synplicity, Inc. | Methods and apparatuses for designing integrated circuits |
US6305000B1 (en) * | 1999-06-15 | 2001-10-16 | International Business Machines Corporation | Placement of conductive stripes in electronic circuits to satisfy metal density requirements |
JP4141322B2 (ja) * | 2003-06-13 | 2008-08-27 | Necエレクトロニクス株式会社 | 半導体集積回路の自動配線方法及び半導体集積回路の設計のプログラム |
JP4606776B2 (ja) * | 2004-05-28 | 2011-01-05 | ルネサスエレクトロニクス株式会社 | 半導体装置 |
US7240314B1 (en) * | 2004-06-04 | 2007-07-03 | Magma Design Automation, Inc. | Redundantly tied metal fill for IR-drop and layout density optimization |
JP2006253498A (ja) * | 2005-03-11 | 2006-09-21 | Matsushita Electric Ind Co Ltd | 半導体集積回路装置 |
TWI513989B (zh) * | 2005-09-13 | 2015-12-21 | Ebara Corp | 半導體裝置 |
JP2008198761A (ja) | 2007-02-13 | 2008-08-28 | Renesas Technology Corp | 半導体装置 |
US8050044B2 (en) * | 2007-08-31 | 2011-11-01 | Inventec Corporation | Power plane and a manufacturing method thereof |
US8350375B2 (en) * | 2008-05-15 | 2013-01-08 | Lsi Logic Corporation | Flipchip bump patterns for efficient I-mesh power distribution schemes |
-
2010
- 2010-06-17 US US13/387,566 patent/US9532442B2/en not_active Expired - Fee Related
- 2010-06-17 WO PCT/JP2010/004038 patent/WO2011021339A1/ja active Application Filing
- 2010-06-17 JP JP2011527559A patent/JP5472305B2/ja active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2001339169A (ja) * | 2000-05-29 | 2001-12-07 | Kyocera Corp | 多層配線基板 |
JP2003204044A (ja) * | 2001-10-25 | 2003-07-18 | Mitsubishi Electric Corp | 薄膜磁性体記憶装置 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2019096857A (ja) * | 2017-11-24 | 2019-06-20 | 廣達電脳股▲ふん▼有限公司 | 戻り経路における低減された放射を有する高速差動トレース |
Also Published As
Publication number | Publication date |
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US9532442B2 (en) | 2016-12-27 |
JP5472305B2 (ja) | 2014-04-16 |
JPWO2011021339A1 (ja) | 2013-01-17 |
US20120120617A1 (en) | 2012-05-17 |
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