CN101360408B - Electric power laminated board - Google Patents
Electric power laminated board Download PDFInfo
- Publication number
- CN101360408B CN101360408B CN2007101358521A CN200710135852A CN101360408B CN 101360408 B CN101360408 B CN 101360408B CN 2007101358521 A CN2007101358521 A CN 2007101358521A CN 200710135852 A CN200710135852 A CN 200710135852A CN 101360408 B CN101360408 B CN 101360408B
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- circuit
- circuit block
- electric power
- circuit blocks
- laminated board
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- Production Of Multi-Layered Print Wiring Board (AREA)
- Structure Of Printed Boards (AREA)
Abstract
The invention discloses a power supply layer plate, which provides a DC potential and filter noise on the power supply layer plate. The power supply layer plate includes a first circuit block and a second circuit block. The length of the first and second circuit blocks is related to frequency of the noise to be filtered. The second circuit block is coupled with the first circuit block, and the width of the second circuit block is bigger or smaller than that of the first circuit block.
Description
Technical field
The present invention relates to a kind of electric power laminated board and manufacture method thereof, and relate in particular to a kind of electric power laminated board and manufacture method thereof that can suppress high-frequency noise.
Background technology
In high-speed digital circuit, during via unfavorable transmission paths such as signal communication post (Via) or discontinuous signal reference planes, can cause noise between electric power laminated board/ground plane because of high speed signal.Noise between electric power laminated board/ground plane also may be transmitted to other position of digital circuit with the form of parallel-plate waveguide.
For fear of the noise between electric power laminated board/ground plane the electronic component on the digital circuit is impacted, be the cutting power supply laminate traditionally, cutting just provides the circuit board of power supply, is connected between the circuit board that has cut with conductor or coupling capacitance then, comes filtering noise.
Yet the cutting power supply laminate only can suppress low-frequency noise, but can't isolate the high-frequency resonance noise.The signal that the high-frequency resonance noise that is not eliminated can cause circuit board to transmit is imperfect, or produces problem such as electromagnetic interference.
Therefore need a kind of new electric power laminated board and manufacture method thereof, can suppress high-frequency noise effectively.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of electric power laminated board, can transmit current potential, and filter away high frequency noise effectively.
According to one embodiment of the invention, the invention provides a kind of electric power laminated board, comprise one first circuit blocks and second circuit block.First circuit blocks is relevant with the noise frequency of desire filtering with the length of second circuit block.The second circuit block couples first circuit blocks, and the width of this first circuit blocks then is greater than or less than the width of second circuit block, and wherein the length of this first circuit blocks and this second circuit block and the pass of this noise frequency are:
L represents the length of this first circuit blocks or this second circuit block, V
pRepresent a phase velocity constant 3 * 10
8M/s, f are this noise frequency, ε
EffIt then is the effective dielectric constant of this first circuit blocks or this second circuit block.
The electric power laminated board of the foregoing description can transmit DC potential, and filter away high frequency noise effectively.
Description of drawings
For above and other objects of the present invention, feature, advantage and embodiment can be become apparent, being described in detail as follows of appended accompanying drawing:
Fig. 1 is the electric power laminated board of one embodiment of the invention;
Fig. 2 is the electric power laminated board manufacture method flow chart of one embodiment of the invention;
Fig. 3 is the frequency response of noise on the electric power laminated board of one embodiment of the invention.
Wherein, Reference numeral:
100: 101: the first circuit blocks length of electric power laminated board
103: the first circuit blocks width 105: second circuit block length
107: 109: the first circuit blocks of second circuit block width
111: second circuit block 113: input (noise end)
115: receiving terminal (disturbed end) 301: band resistance width
201,203,205,207,209: the electric power laminated board step of manufacturing
Embodiment
The electric power laminated board of following examples can transmit DC potential, and filter away high frequency noise effectively.
Please refer to Fig. 1, it is the electric power laminated board of one embodiment of the invention.Electric power laminated board 100 comprises first circuit blocks 109 and the second circuit block 111 that couples.Each circuit blocks all can be printed circuit board (PCB).When electric potential signal was passed to receiving terminal (disturbed end) 115 by input (noise end) 113, noise can be by filtering.
The length 101 of first circuit blocks 109 and the length 105 of second circuit block 111, relevant with the noise frequency of desire filtering.Length 101 and length 105 with the pass of noise frequency are:
L is the length 101 of representative first circuit blocks,
V
pFor representing the constant 3 * 10 of phase velocity (Phase Velocity)
8M/s.
F is the frequency of noise,
ε
EffIt then is the effective dielectric constant of first circuit blocks 109 or second circuit block 111.
Because in the present embodiment, first circuit blocks 109 and second circuit block 111 are printed circuit board (PCB), so ε
EffEffective dielectric constant for printed circuit board (PCB).
The length 105 of second circuit block 111 can equate with the length 101 of first circuit blocks 109, or look the actual needs adjustment.The width 107 of second circuit block 111 can less than or greater than the width 103 of first circuit blocks 109.The gap of the first circuit blocks width 103 and second circuit block width 107 is relevant with a band resistance width (bandstop width).For instance, if desire increases the band resistance width of filtering noise, then can increase the stand out distance of two circuit blocks.
Because first circuit blocks 109 and second circuit block 111 transmit high-frequency signal; therefore in high frequency response; first circuit blocks, 109 resistance values can have suitable difference with the resistance value of second circuit block 111 usually, and make first circuit blocks 109 have capacitive impedance and inductive impedance respectively with second circuit block 111.According to the microwave filter theory, when capacitive impedance is connected with this step pattern with inductive impedance, can present the low-pass filtering effect, therefore can filter away high frequency noise.Adjust the number of first circuit blocks 109 and second circuit block 111, then can promote the filtration result of high-frequency noise.
Please refer to Fig. 2, it is the electric power laminated board manufacture method flow chart of one embodiment of the invention.At first measure or simulate the resonance frequency (step 201) of original electric power laminated board, this resonance frequency can be along with the material of original electric power laminated board and size and different.Then, estimating a predetermined length (step 203) according to resonance frequency, wherein is according to formula:
V
pBe 3 * 10
8M/s,
F is the frequency of noise,
ε
EffIt then is the effective dielectric constant of circuit board.
Try to achieve the predetermined length of first circuit blocks and second circuit block according to this formula.First circuit blocks and second circuit block with this predetermined length can filtering have the noise of resonance frequency.For example, if desire filtering resonance frequency be 5GHz, and dielectric constant is 4.4, the length that then can make first circuit blocks and second circuit block is the noise that 7.15mm comes filtering 5GHz.
Then, form first circuit blocks and second circuit block (step 205) with predetermined length.Then, make the width of first circuit blocks be greater than or less than the width (step 207) of second circuit block, have the specific resonance noise of filter frequently with filtering.Make circuit blocks the time (step 205 and 207), a monoblock circuit board can be cut into first circuit blocks and second circuit block with pre-sizing.Or connect the circuit board of two kinds of pre-sizings, form first circuit blocks and second circuit block.Then, can adjust the number (step 209) of first circuit blocks and second circuit block, promote the filtration result of noise.Can repeat to be connected in series first circuit blocks and second circuit block to width or the length of improving preceding electric power laminated board originally.In addition, if increase the number of first circuit blocks and second circuit block, then can promote the filtration result of noise.
Please refer to Fig. 3, it is the frequency response of noise on the electric power laminated board of one embodiment of the invention.By the measurement of noise as can be known, electric power laminated board is cut into the circuit blocks of the specific length and width of tool after, electric power laminated board is the noise of the about 5GHz of blanketing frequency effectively really.The band resistance width 301 that suppresses noise, then first circuit blocks with above-mentioned is relevant with the stand out distance of second circuit block.Adjust stand out apart from then changing band resistance width 301.
By the foregoing description as can be known, electric power laminated board is cut into the circuit blocks of specific length and width, really filter away high frequency noise effectively.In addition, also can adjust the band resistance width of filtering noise by adjusting the gap of circuit blocks width.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; being familiar with those of ordinary skill in the art ought can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (6)
1. electric power laminated board so as to a direct current current potential and the filtering noise on it is provided, is characterized in that this electric power laminated board comprises:
One first circuit blocks, the length of this first circuit blocks is relevant with a noise frequency of desire filtering; And
One second circuit block, couple this first circuit blocks, the length of this second circuit block is relevant with this noise frequency of desire filtering, the width of this second circuit block then is not equal to the width of this first circuit blocks, and wherein the length of this first circuit blocks and this second circuit block and the pass of this noise frequency are:
L represents the length of this first circuit blocks or this second circuit block,
V
pRepresent a phase velocity constant 3 * 10
8M/s,
F is this noise frequency,
ε
EffIt then is the effective dielectric constant of this first circuit blocks or this second circuit block.
2. electric power laminated board according to claim 1 is characterized in that the length of this second circuit block equals the length of this first circuit blocks.
3. electric power laminated board according to claim 1 is characterized in that the resistance value of this first circuit blocks is less than the resistance value of this second circuit block.
4. electric power laminated board according to claim 1 is characterized in that the resistance value of this first circuit blocks is greater than the resistance value of this second circuit block.
5. electric power laminated board according to claim 1 is characterized in that, this first circuit blocks has a capacitive impedance, and this second circuit block then has an inductive impedance.
6. electric power laminated board according to claim 1 is characterized in that, this first circuit blocks and this second circuit block are a printed circuit board (PCB).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101358521A CN101360408B (en) | 2007-07-30 | 2007-07-30 | Electric power laminated board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101358521A CN101360408B (en) | 2007-07-30 | 2007-07-30 | Electric power laminated board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101360408A CN101360408A (en) | 2009-02-04 |
| CN101360408B true CN101360408B (en) | 2010-06-09 |
Family
ID=40332718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101358521A Expired - Fee Related CN101360408B (en) | 2007-07-30 | 2007-07-30 | Electric power laminated board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101360408B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1308487A (en) * | 2000-12-20 | 2001-08-15 | 周宝星 | Wiring technique for multiplayer printed circuit board |
| CN1747620A (en) * | 2004-09-08 | 2006-03-15 | 华为技术有限公司 | Laminated structure of printing circuit board and multi-laminate laminated structure |
-
2007
- 2007-07-30 CN CN2007101358521A patent/CN101360408B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1308487A (en) * | 2000-12-20 | 2001-08-15 | 周宝星 | Wiring technique for multiplayer printed circuit board |
| CN1747620A (en) * | 2004-09-08 | 2006-03-15 | 华为技术有限公司 | Laminated structure of printing circuit board and multi-laminate laminated structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101360408A (en) | 2009-02-04 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100609 Termination date: 20210730 |
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| CF01 | Termination of patent right due to non-payment of annual fee |