CN102821540A - Printed circuit board capable of inhibiting electromagnetic interference - Google Patents
Printed circuit board capable of inhibiting electromagnetic interference Download PDFInfo
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- CN102821540A CN102821540A CN 201210261286 CN201210261286A CN102821540A CN 102821540 A CN102821540 A CN 102821540A CN 201210261286 CN201210261286 CN 201210261286 CN 201210261286 A CN201210261286 A CN 201210261286A CN 102821540 A CN102821540 A CN 102821540A
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- circuit board
- printed circuit
- signal
- electromagnetic interference
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Abstract
The invention aims to provide a printed circuit board capable of inhibiting electromagnetic interference. The printed circuit board comprises a substrate, wherein the substrate is provided with a plurality of signal areas with different signal frequencies, and a plurality of grounding areas of which the shapes correspond to the shape of each signal area; and the adjacent areas are electrically connected by inductance or magnetic beads. If the printed circuit board is provided with one grounding layer of which the shape conforms to the shape of the printed circuit board, interference signals of different frequencies are connected into the grounding layer in series to intensify the electromagnetic interference. According to the printed circuit board disclosed by the invention, a corresponding grounding area is independently arranged for signal areas of different frequencies, so that the phenomenon that interference signals of different frequencies appear in the single grounding area can be avoided. In addition, adjacent areas are electrically connected by inductance or the magnetic beads. While the potentials of all grounding areas are guaranteed to be the same, a high-frequency interference signal is prevented from being transmitted by the inductance or the magnetic beads by utilizing the characteristics of an inductance or the magnetic bead resistance alternating current signal.
Description
Technical field
The invention belongs to electronic technology field, specially refer to a kind of printed circuit board (PCB) that suppresses electromagnetic interference.
Background technology
Printed circuit board (PCB) is as the carrier of each electronic component and signal path, extensive use in various electronic products.Along with development of electronic technology, the frequency of signal is increasingly high, and this just makes that electromagnetic interference is also more and more serious.And electronic component and cabling are intensive in the printed circuit board (PCB), are the districts occurred frequently of electromagnetic interference, therefore how to limit the electromagnetic interference in the printed circuit board (PCB), have become Electronics Engineer's urgent problem.
Summary of the invention
The objective of the invention is to propose a kind of printed circuit board (PCB) that suppresses electromagnetic interference.
The printed circuit board (PCB) of inhibition electromagnetic interference of the present invention comprises substrate; Said substrate is provided with several different signaling zones of signal frequency; And with corresponding several access areas of each signaling zone shape, utilize inductance or magnetic bead to be electrically connected between the said adjacent area.
If printed circuit board (PCB) is provided with a ground plane with the printed circuit board (PCB) shape-consistent; Will cause the interference signal of each different frequency all to seal in the ground plane, make electromagnetic interference aggravation, and the present invention all is provided with corresponding access area separately for the signaling zone of each different frequency; The interference signal that so just can not cause occurring in the single access area different frequency; In addition, utilize inductance or magnetic bead to be electrically connected between the adjacent area, can be when the current potential that guarantees all access areas be identical; Can utilize the characteristics of inductance or magnetic bead resistance AC signal again, prevent that high-frequency interferencing signal is through inductance or magnetic bead propagation.
Further; Also utilize electric capacity to connect between the said adjacent area; Can select different capacitor's capacities according to concrete signal like this; Make some set specific frequency signal between the adjacent area to propagate in the contiguous access area, thereby absorb the energy of this set specific frequency signal, avoid the signal of the single-frequency of single access area to disturb too high by electric capacity.
The printed circuit board (PCB) of inhibition electromagnetic interference of the present invention can effectively suppress electromagnetic interference, has good practicability.
Description of drawings
Fig. 1 is the structural representation of the printed circuit board (PCB) of inhibition electromagnetic interference of the present invention.
Embodiment
Contrast accompanying drawing below; Through the description to embodiment, the effect of mutual alignment between the shape of specific embodiments of the invention such as related each member, structure, the each several part and annexation, each several part and operation principle etc. are done further to specify.
Embodiment 1:
As shown in Figure 1; The printed circuit board (PCB) of the inhibition electromagnetic interference of present embodiment comprises substrate 1; Substrate 1 is provided with several different signaling zones of signal frequency; And with corresponding several access areas of each signaling zone shape; For example second access area 3 in 3K～1MHz scope of first access area 2 of respective signal frequency in 0～1KHz scope, respective signal frequency, respective signal frequency are greater than all utilizing magnetic bead 5 to be electrically connected between 4, the first access areas 2, the 3rd access area of 5MHz, second access area 3, the 3rd access area 4.
If printed circuit board (PCB) is provided with a ground plane with the printed circuit board (PCB) shape-consistent; Will cause the interference signal of each different frequency all to seal in the ground plane, make electromagnetic interference aggravation, and the present invention all is provided with corresponding access area separately for the signaling zone of each different frequency; The interference signal that so just can not cause occurring in the single access area different frequency; In addition, utilize magnetic bead to be electrically connected between the adjacent area, can be when the current potential that guarantees all access areas be identical; Can utilize the characteristics of inductance or magnetic bead resistance AC signal again, prevent that high-frequency interferencing signal is through inductance or magnetic bead propagation.
In addition; Also utilize electric capacity 6 to be connected between first access area 2 and the 3rd access area 4; Can select different capacitor's capacities according to concrete signal like this; Make some CF (for example 10MHZ) signal between the adjacent area to propagate in the first contiguous access area 2 from the 3rd access area 4, thereby absorb the energy of this set specific frequency signal, avoid the signal of the 10MHZ frequency of the 3rd access area 4 to disturb too high by electric capacity.
Claims (2)
1. printed circuit board (PCB) that suppresses electromagnetic interference; Comprise substrate; It is characterized in that said substrate is provided with several different signaling zones of signal frequency, and with corresponding several access areas of each signaling zone shape, utilize inductance or magnetic bead to be electrically connected between the said adjacent area.
2. the printed circuit board (PCB) of inhibition electromagnetic interference according to claim 1 is characterized in that also utilizing between the said adjacent area electric capacity to connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210261286 CN102821540A (en) | 2012-07-26 | 2012-07-26 | Printed circuit board capable of inhibiting electromagnetic interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210261286 CN102821540A (en) | 2012-07-26 | 2012-07-26 | Printed circuit board capable of inhibiting electromagnetic interference |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102821540A true CN102821540A (en) | 2012-12-12 |
Family
ID=47305302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210261286 Pending CN102821540A (en) | 2012-07-26 | 2012-07-26 | Printed circuit board capable of inhibiting electromagnetic interference |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102821540A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105744729A (en) * | 2016-04-22 | 2016-07-06 | 上海天马微电子有限公司 | Flexible circuit board, electronic equipment and electromagnetic interference filtering method for flexible circuit board |
| CN105939570A (en) * | 2016-06-28 | 2016-09-14 | 广东欧珀移动通信有限公司 | Printed circuit board (PCB) and terminal |
| CN107660063A (en) * | 2016-07-26 | 2018-02-02 | Zf 腓德烈斯哈芬股份公司 | Electronic component |
-
2012
- 2012-07-26 CN CN 201210261286 patent/CN102821540A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105744729A (en) * | 2016-04-22 | 2016-07-06 | 上海天马微电子有限公司 | Flexible circuit board, electronic equipment and electromagnetic interference filtering method for flexible circuit board |
| CN105939570A (en) * | 2016-06-28 | 2016-09-14 | 广东欧珀移动通信有限公司 | Printed circuit board (PCB) and terminal |
| CN105939570B (en) * | 2016-06-28 | 2018-09-18 | 广东欧珀移动通信有限公司 | Printing board PCB and terminal |
| CN107660063A (en) * | 2016-07-26 | 2018-02-02 | Zf 腓德烈斯哈芬股份公司 | Electronic component |
| CN107660063B (en) * | 2016-07-26 | 2022-05-03 | Zf 腓德烈斯哈芬股份公司 | Electronic component |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121212 |