CN109873616A - A kind of low-frequency filter circuit and circuit board - Google Patents
A kind of low-frequency filter circuit and circuit board Download PDFInfo
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- CN109873616A CN109873616A CN201910032830.5A CN201910032830A CN109873616A CN 109873616 A CN109873616 A CN 109873616A CN 201910032830 A CN201910032830 A CN 201910032830A CN 109873616 A CN109873616 A CN 109873616A
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- electrode
- low
- frequency filter
- circuit board
- filter circuit
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Abstract
The embodiment of the present invention provides a kind of low-frequency filter circuit and circuit board, including the full-wave bridge being made of four diodes and a filter condenser, wherein, filter condenser is made of first electrode, second electrode and a filter membrane, the first electrode, second electrode and the filter membrane are packaged into the thin-film device of a sandwich structure, wherein, the first electrode and the second electrode include the composite construction of metal alkene and carbon nanotube.The volume of low-frequency filter circuit can be reduced compared with prior art using the embodiment of the present invention.
Description
Technical field
The present embodiments relate to micro Process and electrochemical technology field more particularly to a kind of low-frequency filter circuits and circuit
Plate.
Background technique
Universal with Internet of Things and wearable device, electronic device is continued to develop towards miniaturization and flexibility.
As the most crucial component in electronic device, circuit is also required to have similar property.The flexible circuit of form of film is main
What is relied on is that there is patch type electronic component and the flexible circuit board of small size to constitute.In many electronic components,
The volume of active logic transistor is reduced along with Moore's Law with exponential form, but other some passive components, such as
Resistance, inductance and capacitor etc. do not obtain apparent improvement but in volume.Currently, passive component, especially electrolytic capacitor,
Have become and occupies the maximum electronic component of volume among circuit.
In low-frequency range, filter circuit is mainly used among power management, and major function is removal from higher level's power grid
In ripple.Since the fundamental frequency of ripple is at 100 hertz (AC signals in twice power grid), so such low-pass filtering is electric
The capacitor that hundreds of microfarads or even millifarad are up to using capacity must be obtained among road, to obtain sufficiently low cutoff frequency.It is logical
Normal resolution policy has been realized since being the pillar electrolytic capacitor using large volume.
Summary of the invention
For the technical problems in the prior art, the embodiment of the present invention provides a kind of low-frequency filter circuit and circuit
Plate.
In a first aspect, the embodiment of the present invention provides a kind of low-frequency filter circuit, comprising: the all-wave being made of four diodes
Rectifier bridge and a filter condenser, wherein filter condenser is made of first electrode, second electrode and a filter membrane, described
First electrode, second electrode and the filter membrane are packaged into the thin-film device of a sandwich structure, wherein the first electrode and
The second electrode includes the composite construction of metal alkene and carbon nanotube.
Second aspect, the embodiment of the present invention provide a kind of circuit board, comprising: flexible circuit board, it is described above for carrying
Low-frequency filter circuit.
Low-frequency filter circuit and circuit board provided in an embodiment of the present invention, including the full-wave rectification being made of four diodes
Electric bridge and a filter condenser, wherein filter condenser is made of first electrode, second electrode and a filter membrane, and described first
Electrode, second electrode and the filter membrane are packaged into the thin-film device of a sandwich structure, wherein the first electrode and described
Second electrode includes the composite construction of metal alkene and carbon nanotube.Low frequency can be reduced compared with prior art using the embodiment of the present invention
The volume of filter circuit.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the structural schematic diagram of electrode for capacitors provided in an embodiment of the present invention；
Fig. 2 is the thin film circuit schematic diagram of filter condenser provided in an embodiment of the present invention；
Fig. 3 is the voltage output schematic diagram of the film filter circuit provided in an embodiment of the present invention for giving filter condenser；
Fig. 4 a is the domain schematic diagram of flexible circuit board provided in an embodiment of the present invention；
Fig. 4 b is the domain schematic diagram for the flexible circuit board that further embodiment of this invention provides
Fig. 5 is the display figure of the practical application of flexible circuit board provided in an embodiment of the present invention.
Appended drawing reference:
1: sine input；2: full-wave rectification output；3: commercial supercapacitor；
4: electrolytic capacitor；5: micro super capacitor.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Fig. 1 is the structural schematic diagram of low-frequency filter circuit provided in an embodiment of the present invention, as shown in Figure 1, including by four
Diode composition full-wave bridge and a filter condenser, wherein filter condenser by first electrode, second electrode and
One filter membrane composition, the first electrode, second electrode and the filter membrane are packaged into the thin-film device of a sandwich structure,
In, the first electrode and the second electrode include the composite construction of metal alkene and carbon nanotube.
Since the volume that low-frequency filter circuit in the prior art occupies is larger, the embodiment of the present invention provide a kind of volume compared with
Small low-frequency filter circuit, including the full-wave bridge being made of four diodes and a filter condenser, wherein filtering
Capacitor is made of first electrode, second electrode and a filter membrane, and the first electrode, second electrode and the filter membrane are packaged into one
The thin-film device of a sandwich structure, wherein the first electrode and the second electrode include metal alkene and carbon nanotube
Composite construction.
Fig. 2 is the thin film circuit schematic diagram of filter condenser provided in an embodiment of the present invention, as shown in Fig. 2, the filtering
The preparation method of the thin film circuit of capacitor, as follows:
It, will using PI glue band (other adhesive tapes or glue stick can also be used) on fiber multihole filter membrane of the aperture greater than 0.2 micron
Metallic mask with interdigital structure hollow out closely attaches.Then, one layer of nanogold is deposited using the method for sputtering or vapor deposition
(or platinum, the inert metals such as chromium) particle, thickness is optional between 30~200 nanometers, forms the conductive structure (tool of an interdigitated
Volume graphic and size are determined that there is no limit by mask).
Since the size of gold particle is distributed in 30~50nm, so the nano-pore of filter membrane is not plugged up, so that should
Filter membrane still can be used for filtering technique while with good electric conductivity.Vacuum is then used on conductive porous substrate
Suction filtration device deposits the composite construction of one layer of metal alkene and carbon nanotube using the electrode layer as supercapacitor.Wherein metal alkene
Material can be to provide big fake capacitance, and the compound frequency response for making this supercapacitor of carbon nanotube can be improved
To hundred hertz of magnitude.Then, electrolyte (KOH solution of 1mol/L) in the drop coating of interdigital electrode region, then uses PVC
Film carries out device encapsulation.
On the basis of the above embodiments, it is preferable that the thickness of sharp filter condenser obtained with the aforedescribed process is less than
500um。
Preferably, the first electrode and the second electrode include the composite construction of metal alkene and carbon nanotube, specifically
Are as follows:
Including at least double layer of metal alkene and an at least carbon nanotube, wherein there is one layer of carbon between every two metal layers
Nanotube.
Electrode provided in an embodiment of the present invention uses intercalation configuration, and interlamellar spacing (effective aperture) and carbon nanotube contain
Amount is positively correlated.
Optionally, the first electrode, second electrode and the filter membrane are packaged into one using PVC film by the embodiment of the present invention
The thin-film device of a sandwich structure.
Optionally, on the basis of the above embodiments, through test it is found that the filter condenser 120Hz Frequency point
Locate capacitance density up to 6mF/cm2。
Preferably, the diode is 0603 encapsulation.
The embodiment of the present invention also provides a kind of circuit board characterized by comprising flexible circuit board, it is above-mentioned for carrying
The low-frequency filter circuit.
The embodiment of the present invention provides a kind of circuit board, using flexible circuit board, for carrying low frequency filtering described above
Circuit, i.e., the full-wave bridge and a filter condenser formed by one by four diodes form.
In order to realize the flexibility of circuit entirety, embodiment preferably uses FPC flexible circuit board as base in the present invention
Ground, the ultra-small volume that diode uses 0603 formula encapsulate.Above-mentioned filter condenser is linked into FPC plate by conductive silver paste again
On to constitute low-frequency filter circuit, and device performance will not be lost under the conditions of curved.
Fig. 3 is the voltage output schematic diagram of the film filter circuit provided in an embodiment of the present invention for giving filter condenser,
As shown in figure 3, can be obtained using circuit provided in an embodiment of the present invention highly stable in the case where sinusoidal signal input
Direct current output, such as the line 5 in Fig. 3.
Preferably, the thickness of the flexible circuit board is less than 1 millimeter, and complete flexibility may be implemented.In addition, in 60Hz
Sinusoidal input under, the ripple factor of this filter circuit output signal is less than 1.6%.
Fig. 4 a is the domain schematic diagram of flexible circuit board provided in an embodiment of the present invention, as seen from the figure, circuit board of the present invention
The layout size of offer is significantly less than the layout size of the prior art.
Fig. 4 b is the domain schematic diagram for the flexible circuit board that further embodiment of this invention provides, and Fig. 5 is the embodiment of the present invention
The display figure of the practical application of the flexible circuit board of offer, the lower low-frequency filter circuit that passes through of exchange input is to support LED array
The domain of flexible circuit board reduces the size of prior art.
The apparatus embodiments described above are merely exemplary, wherein described, unit can as illustrated by the separation member
It is physically separated with being or may not be, component shown as a unit may or may not be physics list
Member, it can it is in one place, or may be distributed over multiple network units.It can be selected according to the actual needs
In some or all of the modules achieve the purpose of the solution of this embodiment.Those of ordinary skill in the art are not paying creativeness
Labour in the case where, it can understand and implement.
Through the above description of the embodiments, those skilled in the art can be understood that each embodiment can
It realizes by means of software and necessary general hardware platform, naturally it is also possible to pass through hardware.Based on this understanding, on
Stating technical solution, substantially the part that contributes to existing technology can be embodied in the form of software products in other words, should
Computer software product may be stored in a computer readable storage medium, such as ROM/RAM, magnetic disk, CD, including several fingers
It enables and using so that a computer equipment (can be personal computer, server or the network equipment etc.) executes each implementation
Method described in certain parts of example or embodiment.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (9)
1. a kind of low-frequency filter circuit, which is characterized in that filtered including the full-wave bridge being made of four diodes and one
Wave capacitor, wherein filter condenser is made of first electrode, second electrode and a filter membrane, the first electrode, second electrode
The thin-film device of a sandwich structure is packaged into the filter membrane, wherein the first electrode and the second electrode include
The composite construction of metal alkene and carbon nanotube.
2. low-frequency filter circuit according to claim 1, which is characterized in that the thickness of the filter condenser is less than
500um。
3. low-frequency filter circuit according to claim 1, which is characterized in that the first electrode and the second electrode packet
The composite construction of metal alkene and carbon nanotube is included, specifically:
Including at least double layer of metal alkene and an at least carbon nanotube, wherein there is one layer of carbon nanometer between every two metal layers
Pipe.
4. low-frequency filter circuit according to claim 1, which is characterized in that the first electrode, second electrode and described
Filter membrane is packaged into the thin-film device of a sandwich structure, specifically:
The first electrode, second electrode and the filter membrane are packaged into the thin-film device of a sandwich structure using PVC film.
5. low-frequency filter circuit according to claim 1, which is characterized in that frequency of the filter condenser in 120Hz
Capacitance density at point is 6mF/cm2。
6. low-frequency filter circuit according to claim 1, which is characterized in that the diode is 0603 encapsulation.
7. a kind of circuit board characterized by comprising flexible circuit board is described in any one of claims 1-6 low for carrying
Frequency filter circuit.
8. low-frequency filter circuit according to claim 7, which is characterized in that the flexible circuit board is FPC circuit board.
9. low-frequency filter circuit according to claim 8, which is characterized in that the thickness of the flexible circuit board is less than 1 milli
Rice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910032830.5A CN109873616A (en) | 2019-01-14 | 2019-01-14 | A kind of low-frequency filter circuit and circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910032830.5A CN109873616A (en) | 2019-01-14 | 2019-01-14 | A kind of low-frequency filter circuit and circuit board |
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| Publication Number | Publication Date |
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| CN109873616A true CN109873616A (en) | 2019-06-11 |
Family
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| CN201910032830.5A Pending CN109873616A (en) | 2019-01-14 | 2019-01-14 | A kind of low-frequency filter circuit and circuit board |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110323327A (en) * | 2019-06-28 | 2019-10-11 | 西安交通大学 | A kind of manufacturing method of the curved surface circuit of power/be thermally integrated perception |
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| US20130222975A1 (en) * | 2012-02-29 | 2013-08-29 | Yongan Yan | Method of purifying carbon nanotubes and applications thereof |
| CN103500665A (en) * | 2013-08-29 | 2014-01-08 | 逢甲大学 | Super capacitor with core-shell type electrodes |
| CN104272408A (en) * | 2012-03-18 | 2015-01-07 | 埃尔比特***C4l有限公司 | Aqueous-based electric double-layer capacitor |
| CN107742702A (en) * | 2017-09-21 | 2018-02-27 | 天津大学 | The CNT and tin ash of three-dimensional " upper thread face " structure are modified titanium carbide lithium ion battery negative material and preparation method |
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Patent Citations (4)
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| US20130222975A1 (en) * | 2012-02-29 | 2013-08-29 | Yongan Yan | Method of purifying carbon nanotubes and applications thereof |
| CN104272408A (en) * | 2012-03-18 | 2015-01-07 | 埃尔比特***C4l有限公司 | Aqueous-based electric double-layer capacitor |
| CN103500665A (en) * | 2013-08-29 | 2014-01-08 | 逢甲大学 | Super capacitor with core-shell type electrodes |
| CN107742702A (en) * | 2017-09-21 | 2018-02-27 | 天津大学 | The CNT and tin ash of three-dimensional " upper thread face " structure are modified titanium carbide lithium ion battery negative material and preparation method |
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| QISHAN FU: "Self-assembled Ti3C2Tx/SCNT composite electrode with improved electrochemical performance for supercapacitor", 《JOURNAL OF COLLOID AND INTERFACE SCIENCE》 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110323327A (en) * | 2019-06-28 | 2019-10-11 | 西安交通大学 | A kind of manufacturing method of the curved surface circuit of power/be thermally integrated perception |
| CN110323327B (en) * | 2019-06-28 | 2020-10-27 | 西安交通大学 | Manufacturing method of force/heat integrated sensing curved circuit |
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Application publication date: 20190611 |