CN207589067U - A kind of modified duplexer module - Google Patents
A kind of modified duplexer module Download PDFInfo
- Publication number
- CN207589067U CN207589067U CN201721811784.1U CN201721811784U CN207589067U CN 207589067 U CN207589067 U CN 207589067U CN 201721811784 U CN201721811784 U CN 201721811784U CN 207589067 U CN207589067 U CN 207589067U
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- Prior art keywords
- signal
- direct current
- absorption circuit
- current absorption
- modified
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Abstract
The utility model provides a kind of modified duplexer module, including duplex unit and tuning receiving unit；The duplex unit includes the isolation capacitance, signal distributor and the traffic filter that are sequentially connected；Described isolation capacitance one end is connected with signal distributor, and the other end is connected by direct current absorption circuit with rf inputs；The traffic filter includes TV signal wave filter and network signal wave filter, and input terminal is connected respectively with the output terminal of signal distributor；The output terminal of the TV signal wave filter is connected with tuning the tv signal input of receiving unit；A preposition direct current absorption circuit is increased inside traditional duplexing tuner, module is greatly improved to coming from the tolerance of the high-voltage dc signal of outer, coaxial cable signal core wire, it is allow to bear the voltge surge of remote super signal isolation capacitance pressure voltage, be greatly improved module and built-in module receiving device or set-top box it is safe to use.
Description
Technical field
The utility model is related to a kind of modified duplexer modules, are related to television signal transmission field.
Background technology
During the integration of three networks, for being difficult to carry out the old residential community of fiber reforming, to realize the function of online, broadcasting and TV
Operator, using frequency multiplexing technique, network signal and television broadcasting signal is loaded on not on the basis of original CHINA RFTCOM Co Ltd
Same frequency, is mounted on original cable network, by cable tv coax, is transferred to customer households, realizes in family
Net function.
In user terminal, that is, radio and television users family, input signal is needed first by a cable television duplexer, by network
Signal is separated into the output of two classes with broadcast television signal, and network signal enters network element and is changed into TCP/IP letters after processing
Number, the network equipments such as couple in router, interchanger, connect computer or mobile terminal realizes online；Broadcast television signal is accessed
Set-top box is demodulated decoding and is converted to standard television signal.
To meet different application requirements, the technology for realizing family online by cable tv coax usually uses
Two kinds of standards of EOC and DOCSIS.EOC is the abbreviation of Ethernet Over Coaxial, be it is a kind of use coaxial cable transmission with
The technical standard netted very much is issued by the country and is used widely at home；DOCSIS is also known as cable data System-Interface-Specification,
It is another technology by cable of cable TV high-speed transferring data, is proposed by Cable Labs, by International Telecommunication Union ITU
Adopt and be worldwide used widely.Two kinds of technologies all employ frequency division multiplexing, are required for double using cable television
Work device, meet EOC standards is known as EOC duplexers, and meet DOCSIS standards is known as DOCSIS duplexers, and two kinds of duplexers are only
It is the difference of wave filter caused by frequency partition, basic principle has no difference.This patent is referred to as cable television duplex
Device.
As shown in Figure 1, in duplexer block diagram, it can be seen that inside duplexer be by wave filter realize television carrier and
The separation of network signal, it should be noted that when actual circuit is realized, due to television carrier or the occupied frequency of network signal
Might not be continuous, there is intersection in frequency between the two, so the output of duplexer might not only have two-way, as network is believed
Number there may be 1-2 roads or may be more, so the output of block diagram description is two classes rather than two-way.
For using the digital television bidirectional receiving device of EOC or DOCSIS technical standards, built-in make is needed inside equipment
With duplexer module.Two-way receiving device is as shown in Figure 1 using the connection of duplexer module and realization principle.
Cable of cable TV of registering one's residence is plugged in the rf inputs of duplexer, passes through the realization pair of duplexer internal insulation capacitance
The DC voltage registered one's residence between cable of cable TV and receiving device is isolated, and by signal distribution and traffic filter, is separated into
Television carrier and network signal are simultaneously exported from duplexer module.
The network signal of duplexer module output exports to the network communication processing unit of receiving device, realizes TCP/IP
Unpacking, error correction and Communication processing, with RJ45 connectors from receiving device export, connect by external router, interchanger or directly
Enter computer terminal, complete family online.
Utility model content
The technical problem to be solved by the present invention is to provide a kind of more efficient modified duplexer modules, and having can
When exceeding the built-in isolation capacitance pressure voltage of duplexing module to the transient voltage value for coming from input signal end, low pressure resistance is protected
Isolation capacitance is not easy breakdown and damage, so that module and set-top box, television set are not damaged.
The technical solution adopted in the utility model is as follows：A kind of modified duplexer module, including with rf inputs phase
Duplexer Unit even；It is characterized in that：The Duplexer Unit includes the isolation capacitance, signal distributor and the letter that are sequentially connected
Number wave filter；Described isolation capacitance one end is connected with signal distributor, and the other end passes through direct current absorption circuit and rf inputs
It is connected；The traffic filter include TV signal wave filter and network signal wave filter, input terminal respectively with signal distributor
Output terminal be connected.
The direct current absorption circuit includes direct current absorption circuit component；The direct current absorption circuit component is hollow coil electricity
Sense, coiling core inductance or the component for having correlation function；It is defeated that described direct current absorption circuit component one end is connected to the radio frequency
Enter between end and isolation capacitance, other end ground connection.
A metallic shield, the built-in direct current absorption circuit and Duplexer Unit are further included, is installed on receiving device
It is internal.
The metallic shield is directly welded on mainboard.
Trepanning is provided on the metallic shield, for fixing coaxial input adapter, and the coaxial input adapter
Ground is electrically connected with metallic shield, and is electrically connected with the ground of PCBA circuit board assemblies.
The center signal line of the coaxial input adapter is fixed on PCBA circuit boards across metallic shield with welding manner
On component, it is connected with the signal input of direct current absorption circuit.
Compared with prior art, the beneficial effects of the utility model are：Increased inside conventional diplexer one it is preposition
Direct current absorption circuit, be greatly improved module to come from outer, coaxial cable signal core wire high-voltage dc signal it is resistance to
By ability so that it can bear the voltge surge of remote super signal isolation capacitance pressure voltage, it is greatly improved module and built-in mould
Group receiving device or set-top box it is safe to use.
Description of the drawings
Fig. 1 is the theory structure schematic diagram of prior art duplexer module.
Fig. 2 is the theory structure schematic diagram of duplexer module of the present invention.
Fig. 3 is the theory structure schematic diagram of the duplexer module of a wherein embodiment of the invention.
Fig. 4 is the application principle structure diagram of the duplexer module of a wherein embodiment of the invention.
Fig. 5 is the application principle structure diagram of the duplexer module of a wherein embodiment of the invention.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention is further described in detail.It should be appreciated that specific embodiment described herein is only explaining this
Utility model is not used to limit the utility model.
This specification（Including any abstract and attached drawing）Disclosed in any feature, unless specifically stated, can be by other
Equivalent or with similar purpose alternative features are replaced.That is, unless specifically stated, each feature is a series of equivalent
An or example in similar characteristics.
Specific embodiment 1
As shown in Fig. 2, a kind of modified duplexer module, including the Duplexer Unit being connected with rf inputs；It is described
Duplexer Unit includes the isolation capacitance, signal distributor and the traffic filter that are sequentially connected；Described isolation capacitance one end and letter
Number distributor is connected, and the other end is connected by direct current absorption circuit with rf inputs；The traffic filter is believed including TV
Number wave filter and network signal wave filter, input terminal are connected respectively with the output terminal of signal distributor.
This modified duplexer module increases a preposition direct current absorption circuit, greatly inside conventional diplexer
Improve module to come from outer, coaxial cable signal core wire high-voltage dc signal tolerance so that it can bear
The voltge surge of remote super signal isolation capacitance pressure voltage is greatly improved the receiving device or set-top box of module and built-in module
It is safe to use.Direct current absorbent assembly is designed in signal isolation capacitance forepart, ensure that duplexer built-in function does not change.
Preposition direct current absorbent assembly only needs minimum cloth member cabling space, it is ensured that original module is in the immovable situation of volume
Under, possess higher security performance.
In addition, effective radio-frequency input signals is EOC network signals and TV carrier signal, frequency of use ranging from 5-
1000MHz improves increased preposition direct current absorbent assembly and only the direct current and low frequency signal voltage that are less than 5MHz is absorbed, and
The transmission of the signal higher than 5MHz is not influenced, ensure that the receiving sensitivity of receipt of subsequent unit is unaffected.
As shown in Figure 4 and Figure 5, it is two kinds of applications of principle of the invention structure, a kind of receiving device can either be applied to, such as
The equipments for surfing the net such as set-top box or router and computer；It can also apply to a kind of digital television bidirectional set-top box.
Specific embodiment 2
On the basis of specific embodiment 1, as shown in figure 3, the direct current absorption circuit includes direct current absorption circuit component；
The direct current absorption circuit component is hollow coil inductance, coiling core inductance or the component for having correlation function；The direct current
Absorption circuit component one end is connected between the rf inputs and isolation capacitance, other end ground connection.Inexpensive is preposition straight
Absorbent assembly design is flowed, reduces requirement of the signal isolation capacitance to tolerating high voltage built in module, is promoted in security performance
On the basis of reduce product cost.
Specific embodiment 3
On the basis of specific embodiment 1 or 2, further include a metallic shield, the built-in direct current absorption circuit and
Duplexer Unit is installed on inside receiving device, and input terminal can be directly connected to cable television drop cable.
Specific embodiment 4
On the basis of specific embodiment 3, the metallic shield is directly welded on mainboard.
Specific embodiment 5
On the basis of specific embodiment 3 or 4, trepanning is provided on the metallic shield, is inputted for fixing coaxial
Connector, and the ground of the coaxial input adapter is electrically connected, and electrically connect with the ground of PCBA circuit board assemblies with metallic shield
It connects.
Specific embodiment 6
On the basis of specific embodiment 5, the center signal line of the coaxial input adapter, across metallic shield to weld
The mode of connecing is fixed on PCBA circuit board assemblies, is connected with the signal input of direct current absorption circuit, by direct current absorption circuit group
Part, after being absorbed to the DC voltage for coming from external radio frequency input terminal, the radiofrequency signal for removing DC voltage passes through isolation
Enter signal distribution circuit after capacitance, realize follow-up signal transmission.
After this modified duplexer module built in receiving device, the coaxial drop cable of broadcasting and TV accesses first through rf inputs
Modified duplexer module through direct current absorption circuit component, absorbs the DC voltage in external radio-frequency signal, warp
Isolation capacitance is transferred to signal distribution circuit and traffic filter, is separated into television carrier and network signal.
The difference of frequency range according to residing for radio-frequency input signals, the direct current absorption circuit component built in duplexer module can be with
It is hollow coil inductance, coiling core inductance and the component for having correlation function.Due to this modified duplexer die set
It effectively receives signal to exist for 5-1000MH, so direct current absorption circuit is only to the direct current that is less than 5MHz in radio-frequency input signals and low
Frequency signal generates absorption.
Claims (6)
1. a kind of modified duplexer module, including the Duplexer Unit being connected with rf inputs；It is characterized in that：It is described double
Work device unit includes the isolation capacitance, signal distributor and the traffic filter that are sequentially connected；Described isolation capacitance one end and signal
Distributor is connected, and the other end is connected by direct current absorption circuit with rf inputs；The traffic filter includes TV signal
Wave filter and network signal wave filter, input terminal are connected respectively with the output terminal of signal distributor.
2. modified duplexer module according to claim 1, it is characterised in that：The direct current absorption circuit includes direct current
Absorption circuit component；The direct current absorption circuit component is hollow coil inductance, coiling core inductance or has correlation function
Component；Described direct current absorption circuit component one end is connected between the rf inputs and isolation capacitance, other end ground connection.
3. modified duplexer module according to claim 1 or 2, it is characterised in that：A metallic shield is further included,
The built-in direct current absorption circuit and Duplexer Unit, are installed on inside receiving device.
4. modified duplexer module according to claim 3, it is characterised in that：The metallic shield is directly welded at
On mainboard.
5. modified duplexer module according to claim 3, it is characterised in that：It is provided with out on the metallic shield
Hole, for fixing coaxial input adapter, and the ground of the coaxial input adapter is electrically connected with metallic shield, and electric with PCBA
The ground electrical connection of road plate component.
6. modified duplexer module according to claim 5, it is characterised in that：The center letter of the coaxial input adapter
Number line, is fixed on welding manner on PCBA circuit board assemblies across metallic shield, is inputted with the signal of direct current absorption circuit
It is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721811784.1U CN207589067U (en) | 2017-12-22 | 2017-12-22 | A kind of modified duplexer module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721811784.1U CN207589067U (en) | 2017-12-22 | 2017-12-22 | A kind of modified duplexer module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207589067U true CN207589067U (en) | 2018-07-06 |
Family
ID=62739379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721811784.1U Expired - Fee Related CN207589067U (en) | 2017-12-22 | 2017-12-22 | A kind of modified duplexer module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207589067U (en) |
-
2017
- 2017-12-22 CN CN201721811784.1U patent/CN207589067U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180706 Termination date: 20201222 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |