CN206312185U - A kind of signal circuit for read write line - Google Patents
A kind of signal circuit for read write line Download PDFInfo
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- CN206312185U CN206312185U CN201621252470.8U CN201621252470U CN206312185U CN 206312185 U CN206312185 U CN 206312185U CN 201621252470 U CN201621252470 U CN 201621252470U CN 206312185 U CN206312185 U CN 206312185U
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Abstract
The utility model discloses a kind of signal circuit for read write line, connection radio-frequency module and antenna, including the first filter unit positioned at signal transmitting branch, the second filter unit positioned at signal receiving branch and signal transmitting branch and the shared boosting unit of signal receiving branch；, by giving antenna after the first filter unit and boosting unit, the reception signal of antenna after boosting unit and the second filter unit by giving radio-frequency module for the sending signal of radio-frequency module.The utility model is filtered by the first filter unit to sending signal, and docking the collection of letters number by the second filter unit is filtered, and has effectively filtered out interference signal.Additionally, the utility model carries out boosting treatment by boosting unit to sending signal and reception signal, signal intensity and signal quality are effectively increased.
Description
Technical field
The utility model is related to read write line, more particularly to a kind of signal circuit for read write line.
Background technology
In subway field, effective information is deducted fees and is write to Non-contact Intelligent IC Card using read write line.Read-write
Radio-frequency module, antenna and signal circuit therebetween are usually contained in device.However, because read write line working environment is multiple
Miscellaneous, surrounding is often surrounded by metal, can so there is very big interference to radiofrequency signal.Signal circuit of the prior art is past
Weaker toward the ability for eliminating interference, signal transmission quality is not high.
Utility model content
Utility model purpose：The purpose of this utility model is to provide a kind of elimination interference performance relatively strong, signal transmission quality
Signal circuit for read write line higher.
Technical scheme：Signal circuit for read write line described in the utility model, connects radio-frequency module and antenna,
Sent including the first filter unit positioned at signal transmitting branch, the second filter unit and signal positioned at signal receiving branch
The boosting unit that branch road is shared with signal receiving branch；The sending signal of radio-frequency module is by the first filter unit and boosting unit
After give antenna, the reception signal of antenna after boosting unit and the second filter unit by giving radio-frequency module.
Further, first filter unit includes inductance L2, inductance L3, electric capacity C28, electric capacity C29, electric capacity C31 and electricity
Hold C32；The sending signal of radio-frequency module is divided into first via sending signal and the second tunnel sending signal；Wherein, the first via sends letter
Number flowed into from one end of inductance L2, flowed out from the other end of inductance L2, the other end of inductance L2 is also respectively connected with the one of electric capacity C28
End and one end of electric capacity C29, the other end of electric capacity C28 and the other end of electric capacity C29 are grounded；Second tunnel sending signal is from inductance
One end of L3 flows into, and is flowed out from the other end of inductance L3, and the other end of inductance L3 is also respectively connected with one end and the electric capacity of electric capacity C31
One end of C32, the other end of electric capacity C31 and the other end of electric capacity C32 are grounded；The other end of inductance L2 and inductance L3's is another
End connects boost module respectively.
Further, the boost module includes transformer T1.
Further, the boost module also includes the 3rd filter unit；The sending signal of radio-frequency module is by the first filtering
Antenna is given after unit, the 3rd filter unit and transformer T1.
Further, the 3rd filter unit include in parallel resistance R49 and the electric capacity C27 and resistance R59 of parallel connection and
Electric capacity C33；The sending signal of radio-frequency module is divided into first via sending signal and the second tunnel sending signal；Wherein, the first via sends
Signal by the first filter unit, then by delivering to an input of transformer T1 after in parallel resistance R49 and electric capacity C27；
Second tunnel sending signal by the first filter unit, then by delivering to the another of transformer T1 after in parallel resistance R59 and electric capacity C33
One input.
Further, second filter unit include series connection resistance R21 and the electric capacity C25 and resistance R27 of series connection and
Electric capacity C35；The reception signal of antenna is divided into the first via and receives signal and the second tunnel reception signal；Wherein, the first via receives signal
By boost module, then by delivering to a receiving terminal of radio-frequency module after the resistance R21 and electric capacity C25 of series connection；Second tunnel connects
Collect mail number by boost module, then another receiving terminal of radio-frequency module is delivered to after resistance R27 and electric capacity C35 by connecting.
Further, the resistance of the resistance R21 and resistance R27 is equal, and the capacitance of electric capacity C25 and electric capacity C35 is equal.So
Two series arms are exactly symmetrical, and interference signal can just be cancelled out each other by the two symmetrical series arms, so that
Effectively eliminate interference signal.
Beneficial effect：It is single by the first filtering the utility model discloses a kind of signal circuit for read write line
Unit is filtered to sending signal, and docking the collection of letters number by the second filter unit is filtered, and effectively eliminates interference signal.This
Outward, the utility model carries out boosting treatment by boosting unit to sending signal and reception signal, effectively increases signal intensity
And signal quality.
Brief description of the drawings
Fig. 1 is the circuit diagram of the utility model specific embodiment.
Specific embodiment
With reference to the accompanying drawings and detailed description, the technical solution of the utility model is described further.
The utility model discloses a kind of signal circuit for read write line, as shown in figure 1, including positioned at signal hair
Send the first filter unit of branch road, the second filter unit and signal transmitting branch and the signal reception positioned at signal receiving branch
The shared boosting unit of branch road；The sending signal of radio-frequency module is by giving antenna, day after the first filter unit and boosting unit
The reception signal of line after boosting unit and the second filter unit by giving radio-frequency module.
Wherein, the first filter unit includes inductance L2, inductance L3, electric capacity C28, electric capacity C29, electric capacity C31 and electric capacity C32；
The sending signal of radio-frequency module is divided into first via sending signal and the second tunnel sending signal；Wherein, first via sending signal is from electricity
The one end for feeling L2 flows into, and is flowed out from the other end of inductance L2, and the other end of inductance L2 is also respectively connected with one end and the electricity of electric capacity C28
Hold one end of C29, the other end of electric capacity C28 and the other end of electric capacity C29 are grounded；Second tunnel sending signal is from the one of inductance L3
End flows into, and is flowed out from the other end of inductance L3, and the other end of inductance L3 is also respectively connected with one end and the electric capacity C32 of electric capacity C31
One end, the other end of electric capacity C31 and the other end of electric capacity C32 are grounded；The other end of inductance L2 and the other end of inductance L3 point
Boost module is not connected.
Boost module includes the 3rd filter unit and transformer T1；The sending signal of radio-frequency module is single by the first filtering
Antenna is given after unit, the 3rd filter unit and transformer T1.3rd filter unit include in parallel resistance R49 and electric capacity C27 with
And the resistance R59 and electric capacity C33 of parallel connection；The sending signal of radio-frequency module is divided into first via sending signal and the second tunnel sends letter
Number；Wherein, first via sending signal is by the first filter unit, then by delivering to transformation after resistance R49 and electric capacity C27 in parallel
One input of device T1；Second tunnel sending signal by the first filter unit, then by parallel resistance R59 and electric capacity C33
Another input of transformer T1 is delivered to afterwards.
Second filter unit includes the resistance R21 and electric capacity C25 and the resistance R27 and electric capacity C35 of series connection of series connection；Antenna
Reception signal be divided into the first via and receive signal and the second tunnel and receive signal；Wherein, the first via receives signal by boost module,
Again by delivering to a receiving terminal of radio-frequency module after the resistance R21 and electric capacity C25 that connect；Second tunnel receives signal by boosting
Module, then by delivering to another receiving terminal of radio-frequency module after the resistance R27 and electric capacity C35 of series connection.
The resistance of resistance R21 and resistance R27 is equal, and the capacitance of electric capacity C25 and electric capacity C35 is equal.Two such series connection branch
Road is exactly symmetrical, and interference signal can just be cancelled out each other by the two symmetrical series arms, so as to effectively eliminate
Interference signal.
Claims (7)
1. a kind of signal circuit for read write line, connects radio-frequency module and antenna, it is characterised in that：Including positioned at signal
First filter unit of transmitting branch, the second filter unit and signal transmitting branch and signal positioned at signal receiving branch connect
The shared boosting unit in revenue and expenditure road；The sending signal of radio-frequency module by giving antenna after the first filter unit and boosting unit,
The reception signal of antenna after boosting unit and the second filter unit by giving radio-frequency module.
2. the signal circuit for read write line according to claim 1, it is characterised in that：First filter unit
Including inductance L2, inductance L3, electric capacity C28, electric capacity C29, electric capacity C31 and electric capacity C32；The sending signal of radio-frequency module is divided into first
Road sending signal and the second tunnel sending signal；Wherein, first via sending signal is flowed into from one end of inductance L2, from the another of inductance L2
One end is flowed out, and the other end of inductance L2 is also respectively connected with one end of electric capacity C28 and one end of electric capacity C29, the other end of electric capacity C28
The other end with electric capacity C29 is grounded；Second tunnel sending signal is flowed into from one end of inductance L3, from the other end stream of inductance L3
Go out, the other end of inductance L3 is also respectively connected with one end of electric capacity C31 and one end of electric capacity C32, the other end and electric capacity of electric capacity C31
The other end of C32 is grounded；The other end of inductance L2 and the other end of inductance L3 connect boost module respectively.
3. the signal circuit for read write line according to claim 1, it is characterised in that：The boost module includes
Transformer T1.
4. the signal circuit for read write line according to claim 3, it is characterised in that：The boost module is also wrapped
Include the 3rd filter unit；The sending signal of radio-frequency module is sent by after the first filter unit, the 3rd filter unit and transformer T1
To antenna.
5. the signal circuit for read write line according to claim 4, it is characterised in that：3rd filter unit
Including resistance R49 and electric capacity C27 and the resistance R59 and electric capacity C33 of parallel connection in parallel；The sending signal of radio-frequency module is divided into
Sending signal and the second tunnel sending signal all the way；Wherein, first via sending signal is by the first filter unit, then by parallel
An input of transformer T1 is delivered to after resistance R49 and electric capacity C27；Second tunnel sending signal by the first filter unit, then
Another input by delivering to transformer T1 after resistance R59 and electric capacity C33 in parallel.
6. the signal circuit for read write line according to claim 1, it is characterised in that：Second filter unit
Including the resistance R21 and electric capacity C25 and the resistance R27 and electric capacity C35 of series connection that connect；The reception signal of antenna is divided into the first via
Receive signal and the second tunnel receives signal；Wherein, the first via receives signal by boost module, then by the resistance R21 of series connection
With the receiving terminal that radio-frequency module is delivered to after electric capacity C25；Second tunnel receives signal by boost module, then by the electricity of series connection
Another receiving terminal of radio-frequency module is delivered to after resistance R27 and electric capacity C35.
7. the signal circuit for read write line according to claim 6, it is characterised in that：The resistance R21 and electricity
The resistance for hindering R27 is equal, and the capacitance of electric capacity C25 and electric capacity C35 is equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621252470.8U CN206312185U (en) | 2016-11-17 | 2016-11-17 | A kind of signal circuit for read write line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621252470.8U CN206312185U (en) | 2016-11-17 | 2016-11-17 | A kind of signal circuit for read write line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206312185U true CN206312185U (en) | 2017-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621252470.8U Active CN206312185U (en) | 2016-11-17 | 2016-11-17 | A kind of signal circuit for read write line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206312185U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110855304A (en) * | 2018-07-27 | 2020-02-28 | 珠海格力电器股份有限公司 | Signal transmission circuit and device |
-
2016
- 2016-11-17 CN CN201621252470.8U patent/CN206312185U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110855304A (en) * | 2018-07-27 | 2020-02-28 | 珠海格力电器股份有限公司 | Signal transmission circuit and device |
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