CN204290903U - The filter circuit that belt switch exports - Google Patents
The filter circuit that belt switch exports Download PDFInfo
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- CN204290903U CN204290903U CN201420704807.9U CN201420704807U CN204290903U CN 204290903 U CN204290903 U CN 204290903U CN 201420704807 U CN201420704807 U CN 201420704807U CN 204290903 U CN204290903 U CN 204290903U
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- Prior art keywords
- inductance
- electric capacity
- feedthrough capacitor
- capacity
- common mode
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- 239000003990 capacitor Substances 0.000 claims abstract description 32
- 239000000203 mixture Substances 0.000 claims abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000002159 nanocrystal Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model is the filter circuit that a kind of belt switch exports, comprise the first common mode inductance of inductance L 1-1 and inductance L 1-2 composition, second common mode inductance of inductance L 2-1 and inductance L 2-2 composition, access ae loop after described inductance L 1-1 and inductance L 2-1 serial connection, access bf loop after described inductance L 1-2 and inductance L 2-2 series connection, the input of described inductance L 1-1 and inductance L 1-2 is serially connected with feedthrough capacitor CY1-1 and feedthrough capacitor CY1-2 respectively, between the input of this inductance L 1-1 and inductance L 1-2, also cross-over connection has electric capacity CX1, electric capacity CX2 is connected at the output span of this inductance L 1-1 and inductance L 1-2, the two ends of this electric capacity CX2 are respectively through electric capacity CY2-1 and electric capacity CY2-2 ground connection, the output span of described inductance L 2-1 and inductance L 2-2 is connected to electric capacity CX3, the two ends of this electric capacity CX3 are respectively through electric capacity CY3-1 and electric capacity CY3-2 ground connection, the output of described inductance L 2-2 is also connected in series feedthrough capacitor CY5, switch cd and feedthrough capacitor CY4, forms fg loop.The utility model is to all effective filterings of energy of the high, medium and low frequency electromagnetic interference of input signal, and protected effect is good.
Description
Technical field
The utility model relates to technical field of filtering, is specifically related to the filter circuit that a kind of belt switch exports.
Background technology
Filter is as the equipment by the noise signal filtering in circuit, be widely used in electronic equipment of various, especially in the fields such as communication equipment, Aero-Space, on-board equipment, electromagnetic environment bandwidth, field intensity is large, higher to the requirement of filter circuit, will directly affect safety, the reliability service of relevant device.The common mode disturbances of the conventional many employings of filter circuit multistage common mode inductance filtering frequency electromagnetic waves, poor to the filtration result of differential mode interference, be suitable for frequency narrow, limit the application of filter circuit, at some special dimensions, need to carry out switch control rule to the output of filter circuit, conventional filter circuit just can be discontented with is enough to applied environment.
Utility model content
The utility model is for the deficiencies in the prior art, and propose a kind of structure simple, common mode, Differential Mode insertion loss are low, and frequency filtering is wide in range, the filter circuit that the belt switch that can carry out switch control rule to output signal exports.Concrete technical scheme is as follows:
The filter circuit that a kind of belt switch exports, comprise the first common mode inductance of inductance L 1-1 and inductance L 1-2 composition, second common mode inductance of inductance L 2-1 and inductance L 2-2 composition, access ae loop after described inductance L 1-1 and inductance L 2-1 serial connection, access bf loop after described inductance L 1-2 and inductance L 2-2 series connection, the input of described inductance L 1-1 and inductance L 1-2 is serially connected with feedthrough capacitor CY1-1 and feedthrough capacitor CY1-2 respectively, between the input of this inductance L 1-1 and inductance L 1-2, also cross-over connection has electric capacity CX1, electric capacity CX2 is connected at the output span of this inductance L 1-1 and inductance L 1-2, the two ends of this electric capacity CX2 are respectively through electric capacity CY2-1 and electric capacity CY2-2 ground connection, the output span of described inductance L 2-1 and inductance L 2-2 is connected to electric capacity CX3, the two ends of this electric capacity CX3 are respectively through electric capacity CY3-1 and electric capacity CY3-2 ground connection,
The output of described inductance L 2-2 is also connected in series feedthrough capacitor CY5, switch cd and feedthrough capacitor CY4, forms fg loop.
The utility model realizes like this, in filter circuit, ab end is signal input part, wherein feedthrough capacitor CY1-1 and feedthrough capacitor CY1-2 carries out filtering to the noise signal being greater than 10M hertz, again through the first common mode inductance and corresponding electric capacity CX1, electric capacity CX2, the circuit that electric capacity CY2-1 and electric capacity CY2-2 forms carries out filtering again to the noise signal of frequency between 2M-10M, eventually pass the second common mode inductance and corresponding electric capacity CX3, the circuit that electric capacity CY3-1 and electric capacity CY3-2 forms carries out secondary filter to frequency at the low frequency spur signal of 1K-2M, export eventually through output ef, wherein with Ausgang and the switch connect, after feedthrough capacitor CY5 and the further filtering of feedthrough capacitor CY4, as output g, can be according to demand to output switch that g connects, the output state of output is controlled, further filtering is carried out to output signal simultaneously, ensure the stability of output signal, expand range of application of the present utility model.
For better realizing the utility model, may further be:
The magnet ring of described first common mode inductance and the second common mode inductance adopts iron based nano crystal material to make, and volume is little, is suitable for frequency wide in range, has good common mode, Differential Mode insertion loss characteristic.
The capacity of described feedthrough capacitor CY1-2, feedthrough capacitor CY1-2, feedthrough capacitor CY4 and feedthrough capacitor CY5 is 0.1uF, the capacity of described electric capacity CX1 is 1uF, the capacity of described electric capacity CX2 is 0.47uf, the capacity of described electric capacity CY2-1 and electric capacity CY2-2 is 0.47uF, and the capacity of described electric capacity CX3, electric capacity CY3-1 and electric capacity CY3-2 is 0.22uF.
The beneficial effects of the utility model are: to high, medium and low frequency electromagnetic interference all effective filterings of energy of input signal, protected effect is good; Adopt two common mode inductances to carry out two stage filter to clutter, output signal more steady; Overall structure is simple, with low cost, is conducive to the realization that filter is integrated, miniaturized; At output serial connection switch, and further filtering process is carried out to switching signal, make the utility model can meet the user demand of special dimension, expand range of application of the present utility model.
Accompanying drawing explanation
Fig. 1 is electrical block diagram of the present utility model.
Embodiment
Below in conjunction with drawings and the specific embodiments, the utility model is described in further detail.
As shown in Figure 1: the filter circuit that a kind of belt switch exports, comprise the first common mode inductance of inductance L 1-1 and inductance L 1-2 composition, second common mode inductance of inductance L 2-1 and inductance L 2-2 composition, the iron core of this first common mode inductance and the second common mode inductance adopts iron based nano crystal material to make, whole volume is less, electromagnetic performance is better, access ae loop after described inductance L 1-1 and inductance L 2-1 serial connection, access bf loop after described inductance L 1-2 and inductance L 2-2 series connection, the input of described inductance L 1-1 and inductance L 1-2 is serially connected with feedthrough capacitor CY1-1 and feedthrough capacitor CY1-2 respectively, between the input of this inductance L 1-1 and inductance L 1-2, also cross-over connection has electric capacity CX1, electric capacity CX2 is connected at the output span of this inductance L 1-1 and inductance L 1-2, the two ends of this electric capacity CX2 are respectively through electric capacity CY2-1 and electric capacity CY2-2 ground connection, the output span of described inductance L 2-1 and inductance L 2-2 is connected to electric capacity CX3, the two ends of this electric capacity CX3 are respectively through electric capacity CY3-1 and electric capacity CY3-2 ground connection, the output of described inductance L 2-2 is also connected in series feedthrough capacitor CY5, switch cd and feedthrough capacitor CY4, forms fg loop.
Concrete: the capacity of described feedthrough capacitor CY1-2, feedthrough capacitor CY1-2, feedthrough capacitor CY4 and feedthrough capacitor CY5 is 0.1uF, the capacity of described electric capacity CX1 is 1uF, the capacity of described electric capacity CX2 is 0.47uf, the capacity of described electric capacity CY2-1 and electric capacity CY2-2 is 0.47uF, the capacity of described electric capacity CX3, electric capacity CY3-1 and electric capacity CY3-2 is 0.22uF, meets to frequency the filtering of the noise signal being 1K to 10M.
Claims (3)
1. the filter circuit of a belt switch output, it is characterized in that: the first common mode inductance comprising inductance L 1-1 and inductance L 1-2 composition, second common mode inductance of inductance L 2-1 and inductance L 2-2 composition, access ae loop after described inductance L 1-1 and inductance L 2-1 serial connection, access bf loop after described inductance L 1-2 and inductance L 2-2 series connection, the input of described inductance L 1-1 and inductance L 1-2 is serially connected with feedthrough capacitor CY1-1 and feedthrough capacitor CY1-2 respectively, between the input of this inductance L 1-1 and inductance L 1-2, also cross-over connection has electric capacity CX1, electric capacity CX2 is connected at the output span of this inductance L 1-1 and inductance L 1-2, the two ends of this electric capacity CX2 are respectively through electric capacity CY2-1 and electric capacity CY2-2 ground connection, the output span of described inductance L 2-1 and inductance L 2-2 is connected to electric capacity CX3, the two ends of this electric capacity CX3 are respectively through electric capacity CY3-1 and electric capacity CY3-2 ground connection,
The output of described inductance L 2-2 is also connected in series feedthrough capacitor CY5, switch cd and feedthrough capacitor CY4, forms fg loop.
2. the filter circuit of belt switch output according to claim 1, is characterized in that: the magnet ring of described first common mode inductance and the second common mode inductance adopts iron based nano crystal material to make.
3. the filter circuit of belt switch output according to claim 1, it is characterized in that: the capacity of described feedthrough capacitor CY1-2, feedthrough capacitor CY1-2, feedthrough capacitor CY4 and feedthrough capacitor CY5 is 0.1uF, the capacity of described electric capacity CX1 is 1uF, the capacity of described electric capacity CX2 is 0.47uf, the capacity of described electric capacity CY2-1 and electric capacity CY2-2 is 0.47uF, and the capacity of described electric capacity CX3, electric capacity CY3-1 and electric capacity CY3-2 is 0.22uF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420704807.9U CN204290903U (en) | 2014-11-20 | 2014-11-20 | The filter circuit that belt switch exports |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420704807.9U CN204290903U (en) | 2014-11-20 | 2014-11-20 | The filter circuit that belt switch exports |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204290903U true CN204290903U (en) | 2015-04-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420704807.9U Expired - Fee Related CN204290903U (en) | 2014-11-20 | 2014-11-20 | The filter circuit that belt switch exports |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204290903U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108270353A (en) * | 2018-03-21 | 2018-07-10 | 成都必控科技有限责任公司 | For the multistage planar EMI filter circuit in Switching Power Supply front end and wave filter |
| CN110350532A (en) * | 2019-07-04 | 2019-10-18 | 深圳振华富电子有限公司 | Three-phase four-wire power filter |
-
2014
- 2014-11-20 CN CN201420704807.9U patent/CN204290903U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108270353A (en) * | 2018-03-21 | 2018-07-10 | 成都必控科技有限责任公司 | For the multistage planar EMI filter circuit in Switching Power Supply front end and wave filter |
| CN110350532A (en) * | 2019-07-04 | 2019-10-18 | 深圳振华富电子有限公司 | Three-phase four-wire power filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150422 |