CN204316460U - Moca filter circuit - Google Patents
Moca filter circuit Download PDFInfo
- Publication number
- CN204316460U CN204316460U CN201520060499.5U CN201520060499U CN204316460U CN 204316460 U CN204316460 U CN 204316460U CN 201520060499 U CN201520060499 U CN 201520060499U CN 204316460 U CN204316460 U CN 204316460U
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- China
- Prior art keywords
- electric capacity
- inductance
- magnetic core
- coiling magnetic
- connects
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Abstract
The utility model discloses a kind of MoCA filter circuit, comprises input, output one and output two, and this circuit is made up of the first to the 7th electric capacity, resistance, the first coiling magnetic core, the second coiling magnetic core and first to fourth inductance.It is low that the utility model has loss, and Out-of-band rejection is high, the feature that transition band width is little.
Description
Technical field
The utility model relates to wired television signal system technical field, particularly a kind of MoCA filter circuit.
Background technology
The filter circuit of prior art is only realized by the connection in series-parallel of electric capacity and inductance, and this filter circuit loss is high, and therefore Out-of-band rejection ability is easily subject to the impact of external electromagnetic disturbance, causes signal to be propagated and is interfered.
Utility model content
(1) technical problem that will solve
The purpose of this utility model will overcome above-mentioned shortcoming exactly, aims to provide a kind of MoCA filter circuit.
(2) technical scheme
For achieving the above object, MoCA filter circuit of the present utility model, comprise input, output one and output two, this circuit is made up of the first to the 7th electric capacity, resistance, the first coiling magnetic core, the second coiling magnetic core and first to fourth inductance, described first electric capacity one termination input, described first inductance one termination input, one end of another termination first coiling magnetic core, described second electric capacity and described first inductance in parallel; The other end of the first inductance described in described 3rd electric capacity one termination, one end of the first coiling magnetic core described in another termination of described 3rd electric capacity; One end of described 3rd inductance connects one end of described second coiling magnetic core, and the other end of described 3rd inductance connects one end of described 4th inductance, and the other end of described 4th inductance connects described resistance; Described 5th electric capacity one end connects one end of described second coiling magnetic core, and the described 5th electric capacity other end connects described 6th electric capacity, and described 6th electric capacity also connects output one; Another termination output two of described second coiling magnetic core; Described 8th electric capacity one end connects described second inductance, and the other end is connected to the common port of described 5th electric capacity and described 6th electric capacity.
Further, described first coiling magnetic core and described second coiling magnetic core are electrically connected, and arrange described 4th electric capacity between the public connecting end of described first coiling magnetic core and described second coiling magnetic core and ground connection.
Further, between the public connecting end of described 3rd inductance and described 4th inductance and ground connection, described 7th electric capacity is set.
Further, the public connecting end ground connection of described first electric capacity and described 3rd electric capacity.
Further, described resistance other end ground connection.
(3) beneficial effect
Compared with prior art, the technical solution of the utility model has the following advantages: the resonant tank of inductance and electric capacity composition, have loss low, Out-of-band rejection is high, the feature that transition band width is little.
Accompanying drawing explanation
Fig. 1 is the circuit theory schematic diagram of MoCA filter circuit of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples for illustration of the utility model, but are not used for limiting scope of the present utility model.
As shown in Figure 1, MoCA filter circuit of the present utility model, comprise input, output one and output two, this circuit is made up of the first to the 8th electric capacity C8, resistance R, the first coiling magnetic core T1, the second coiling magnetic core T2 and first to fourth inductance L 4, described first electric capacity C1 mono-termination input, described first inductance L 1 one termination input, one end of another termination first coiling magnetic core T1, described second electric capacity C2 is in parallel with described first inductance L 1; The other end of the first inductance L 1 described in described 3rd electric capacity C3 mono-termination, one end of the first coiling magnetic core T1 described in another termination of described 3rd electric capacity C3; One end of described 3rd inductance L 3 connects one end of described second coiling magnetic core T2, and the other end of described 3rd inductance L 3 connects one end of described 4th inductance L 4, and the other end of described 4th inductance L 4 connects described resistance R; Described 5th electric capacity C5 one end connects one end of described second coiling magnetic core T2, and the described 5th electric capacity C5 other end connects described 6th electric capacity C6, and described 6th electric capacity C6 also connects output one; Another termination output two of described second coiling magnetic core T2; Described 8th electric capacity C8 one end connects described second inductance L 2, and the other end is connected to the common port of described 5th electric capacity C5 and described 6th electric capacity C6.
Described first coiling magnetic core T1 and described second coiling magnetic core T2 is electrically connected, and arranges described 4th electric capacity C4 between the public connecting end of described first coiling magnetic core T1 and described second coiling magnetic core T2 and ground connection.
Between the public connecting end of described 3rd inductance L 3 and described 4th inductance L 4 and ground connection, described 7th electric capacity C7 is set.
The public connecting end ground connection of described first electric capacity C1 and described 3rd electric capacity C3.Described resistance R other end ground connection.Ground connection expression in the present embodiment connects 0 current potential.
The object of ground connection is the low-frequency interference signal consumed in circuit, improves Out-of-band rejection ability.
The resonant tank of the inductance of this circuit and electric capacity composition has LC series loop and LC shunt circuit, in the ideal situation, it is externally 0 impedance during LC series loop resonance, infinitely great to external impedance during the resonance of LC shunt circuit, after the TV signal input of high frequency, utilize the feature of the logical high frequency resistance low frequency of electric capacity, and coordinate the resonance effect of coiling magnetic core and inductance, reduce and the loss of signal in transmitting procedure, the object of ground connection is the low-frequency interference signal consumed in circuit, improve Out-of-band rejection ability, therefore to have loss low for the utility model, Out-of-band rejection is high, the feature that excess bandwidth is little.
In sum, above-mentioned execution mode is not restricted execution mode of the present utility model, and the modification that all those skilled in the art carry out on the basis of flesh and blood of the present utility model or equivalent deformation, all at technology category of the present utility model.
Claims (5)
1. a MoCA filter circuit, comprise input, output one and output two, it is characterized in that: this circuit is made up of the first to the 7th electric capacity, resistance, the first coiling magnetic core, the second coiling magnetic core and first to fourth inductance, described first electric capacity one termination input, described first inductance one termination input, one end of another termination first coiling magnetic core, described second electric capacity and described first inductance in parallel; The other end of the first inductance described in described 3rd electric capacity one termination, one end of the first coiling magnetic core described in another termination of described 3rd electric capacity; One end of described 3rd inductance connects one end of described second coiling magnetic core, and the other end of described 3rd inductance connects one end of described 4th inductance, and the other end of described 4th inductance connects described resistance; Described 5th electric capacity one end connects one end of described second coiling magnetic core, and the described 5th electric capacity other end connects described 6th electric capacity, and described 6th electric capacity also connects output one; Another termination output two of described second coiling magnetic core; Described 8th electric capacity one end connects described second inductance, and the other end is connected to the common port of described 5th electric capacity and described 6th electric capacity.
2. MoCA filter circuit as claimed in claim 1, it is characterized in that: described first coiling magnetic core and described second coiling magnetic core are electrically connected, and arrange described 4th electric capacity between the public connecting end of described first coiling magnetic core and described second coiling magnetic core and ground connection.
3. MoCA filter circuit as claimed in claim 2, is characterized in that: arrange described 7th electric capacity between the public connecting end of described 3rd inductance and described 4th inductance and ground connection.
4. MoCA filter circuit as claimed in claim 3, is characterized in that: the public connecting end ground connection of described first electric capacity and described 3rd electric capacity.
5. MoCA filter circuit as claimed in claim 4, is characterized in that: described resistance other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520060499.5U CN204316460U (en) | 2015-01-28 | 2015-01-28 | Moca filter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520060499.5U CN204316460U (en) | 2015-01-28 | 2015-01-28 | Moca filter circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204316460U true CN204316460U (en) | 2015-05-06 |
Family
ID=53138754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520060499.5U Expired - Fee Related CN204316460U (en) | 2015-01-28 | 2015-01-28 | Moca filter circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204316460U (en) |
-
2015
- 2015-01-28 CN CN201520060499.5U patent/CN204316460U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150506 Termination date: 20210128 |