CN207612115U - Prevention at radio-frequency port direct current tie line - Google Patents
Prevention at radio-frequency port direct current tie line Download PDFInfo
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- CN207612115U CN207612115U CN201721920111.XU CN201721920111U CN207612115U CN 207612115 U CN207612115 U CN 207612115U CN 201721920111 U CN201721920111 U CN 201721920111U CN 207612115 U CN207612115 U CN 207612115U
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Abstract
One end of a kind of prevention at radio-frequency port direct current tie line, including the first inductance, the first inductance is connect with one end of the input terminal of RF+DC and the first capacitance respectively, and the other end of the first capacitance is RF output ends；The other end of first inductance is connect with one end of one end of the second inductance, varistor respectively, and the other end of the second inductance is connect with one end of the anode of the first diode, the second capacitance respectively, and the other end of the second capacitance, the other end of varistor are grounded；The cathode of first diode is connect with one end of third inductance, one end of the 4th capacitance, one end of the 6th capacitance, the cathode of Transient Suppression Diode respectively, which is a DC output ends；The other end of third inductance is connect with one end of DC input terminals, one end of the 5th capacitance, third capacitance respectively, the other end, the other end of the 6th capacitance, the anode of Transient Suppression Diode of 4th capacitance are grounded after being connect with the other end of the 5th capacitance, the other end ground connection of third capacitance.
Description
Technical field
The utility model belongs to cable television technology field, and in particular to one kind being applied to cable TV network terminal light section
The prevention at radio-frequency port direct current tie line of point.
Background technology
Currently, with the development of cable TV two-way network, the RFoG light as one of fiber to the home networking industry standard
The communication technology is further applied.The RFoG optical nodes of user terminal are placed in user room in newly-built building, and electricity is taken not ask
Topic.If RFoG optical nodes are placed in user room in storage CHINA RFTCOM Co Ltd, through walls burrow is needed to introduce optical fiber, difficulty of construction
Greatly, subscriber household finishing is also destroyed, it is difficult to implement.So usually RFoG optical nodes are positioned over outside user room, borrow original
Coaxial cable is registered one's residence.Not ready-made power supply port takes electricity for RFoG optical nodes outside user room, if grid company bracing wire is allowed to power, also
Consider that the auxiliary facilities such as ammeter are installed, cost is too high, can not implement.So outdoor RFoG optical nodes take electric problem to become real
A great problem during the networking of border.
Invention content
The utility model proposes a kind of prevention at radio-frequency port direct current tie lines improving the adaptation of product and reliability.
The technical solution adopted in the utility model is：
A kind of prevention at radio-frequency port direct current tie line, the capacitance of including the first capacitance~the 6th, the first inductance~third inductance, pressure
Quick resistance, the first diode and Transient Suppression Diode, it is characterised in that：One end of first inductance is respectively with RF+DC's
One end of input terminal and the first capacitance connects, and the other end of the first capacitance is RF output ends；The other end of first inductance
It is connect respectively with one end of one end of the second inductance, varistor, the other end of the second inductance sun with the first diode respectively
One end connection of pole, the second capacitance, the other end of the second capacitance, the other end of varistor are grounded；First diode
Cathode respectively with one end of third inductance, one end of the 4th capacitance, one end of the 6th capacitance, Transient Suppression Diode cathode
Connection, which is a DC output ends；The other end of third inductance respectively with DC input terminals, one end of the 5th capacitance, third
One end of capacitance connects, the other end of the 4th capacitance, the other end of the 6th capacitance, Transient Suppression Diode anode with the 5th
It is grounded after the other end connection of capacitance, the other end ground connection of third capacitance；Wherein the first inductance, the second inductance and the first diode
Form Unidirectional direct-current feed circuit.The utility model can directly be powered when power supplied locally by DC input terminals, when local can not
It can be fed and be powered by RF+DC input terminals when power supply.The superposed signal of RF+DC input terminals borrows capacitance resistance direct current and leads to high frequency
Characteristic isolates the output of RF signals by the first capacitance；The characteristic that inductance leads to direct current resistance high frequency is borrowed, the first inductance and the are passed through
Two inductance isolate the power supply of DC direct current signals.The utility model can realize prevention at radio-frequency port DC feedback function, while realize surge
Defencive function improves the adaptation of product and reliability.
Further, first inductance and the second inductance use the ZBL5- of Guangdian Science ＆ Technology Co., Ltd., Zhejiang
757-148 type inductance, or the close enameled wire thick around 20 circle 0.5mm is made by oneself on the bar magnets of ZY3 × 12.
Further, first diode uses the 1N4007 series of diode of FAIRCHILD companies of the U.S..
Further, the varistor and Transient Suppression Diode form surge protection circuit.
Further, the varistor uses the MYG20G07 series of oxidation zinc varistors of Shaanxi Hua Xing.
Further, the Transient Suppression Diode uses the P6KE18A series of diode of FAIRCHILD companies of the U.S..
Further, the capacitance of second capacitance~the 6th and third inductance are electric source filter circuit.
Further, the capacitance of second capacitance~the 4th is the larger electrolytic capacitor of capacitance.
The beneficial effects of the utility model：Prevention at radio-frequency port DC feedback function can be achieved, while realizing surge protection function,
Improve the adaptation of product and reliability.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model.
Specific implementation mode
The utility model is further described with reference to specific embodiment, but the utility model is not limited to
In these specific implementation modes.One skilled in the art would recognize that the utility model covers in Claims scope
All alternatives, improvement project and the equivalent scheme that may include.
Referring to Fig.1, a kind of prevention at radio-frequency port direct current tie line, including the first capacitance C6 of capacitance C1~the 6th, the first inductance
L1~third inductance L3, varistor R1, the first diode V1 and Transient Suppression Diode V2, one end of the first inductance L1
It is connect respectively with one end of the input terminal of RF+DC and the first capacitance C1, the other end of the first capacitance C1 is RF output ends；It is described
The other end of first inductance L1 is connect with one end of one end of the second inductance L2, varistor R1 respectively, and the second inductance L2's is another
One end is connect with one end of the anode of the first diode V1, the second capacitance C2 respectively, the other end, the varistor of the second capacitance C2
The other end of R1 is grounded；The cathode of the first diode V1 respectively with one end of third inductance L3, the 4th capacitance C4 one
The cathode connection at end, one end of the 6th capacitance C6, Transient Suppression Diode V2, which is a DC output ends；Third inductance
The other end of L3 is connect with one end of DC input terminals, one end of the 5th capacitance C5, third capacitance C3 respectively, and the 4th capacitance C4's is another
One end, the other end of the 6th capacitance C6, Transient Suppression Diode V2 anode connect and be followed by with the other end of the 5th capacitance C5
Ground, the other end ground connection of third capacitance C3.The utility model can realize prevention at radio-frequency port DC feedback function, while realize that surge is protected
Protective function improves the adaptation of product and reliability.
The first inductance of the present embodiment L1, the second inductance L2 and the first diode V1 composition Unidirectional direct-current feed circuits can be realized
The feeding capability of 1 ampere of current-carrying capacity.The one-way conduction for borrowing the first diode V1 can prevent the power supply of DC input ports from falling to present
Enter RF+DC input ports.The first inductance L1 and the second inductance L2 is using Guangdian Science ＆ Technology Co., Ltd., Zhejiang
ZBL5-757-148 type inductance, or the close enameled wire thick around 20 circle 0.5mm is made by oneself on the bar magnets of ZY3 × 12.Described
One diode L1 uses the 1N4007 series of diode of FAIRCHILD companies of the U.S..
Varistor R1 described in the present embodiment and Transient Suppression Diode V2 form surge protection circuit, anti-using the circuit
Surge grade is up to 4kV or more.The MYG20G07 series of oxidation zinc varistors of Shaanxi Hua Xing can be used in the varistor R1,
The P6KE18A series of diode of FAIRCHILD companies of the U.S., right+12V power supply systems can be used in the Transient Suppression Diode V2
Play the role of surge protection.If supply voltage changes, the specification of varistor R1 and Transient Suppression Diode V2 also need
Respective change.
The second capacitance C6 of capacitance C2~the 6th and third inductance L3 described in the present embodiment are electric source filter circuit, wherein second
The capacitance C4 of capacitance C2~the 4th are the larger electrolytic capacitor of capacitance.
The utility model can directly be powered when power supplied locally by DC input terminals, can pass through RF when can not locally power
The feed power supply of+DC input terminals.The superposed signal of RF+DC input terminals borrows the characteristic that capacitance resistance direct current leads to high frequency, passes through the first electricity
Hold C1 and isolates the output of RF signals；The characteristic that inductance leads to direct current resistance high frequency is borrowed, L2 points of the first inductance L1 and the second inductance are passed through
Separate out the power supply of DC direct current signals.By this circuit, it can be achieved that prevention at radio-frequency port DC feedback function, while realizing surge protection work(
Can, improve the adaptation of product and reliability.
Claims (8)
- It is the capacitance of including the first capacitance~the 6th, the first inductance~third inductance, pressure-sensitive 1. a kind of prevention at radio-frequency port direct current tie line Resistance, the first diode and Transient Suppression Diode, it is characterised in that：One end of first inductance is defeated with RF+DC respectively Enter one end connection of end and the first capacitance, the other end of the first capacitance is RF output ends；The other end of first inductance point Do not connect with one end of one end of the second inductance, varistor, the other end of the second inductance respectively with the anode of the first diode, One end of second capacitance connects, and the other end of the second capacitance, the other end of varistor are grounded；The moon of first diode Pole connects with the cathode of one end of third inductance, one end of the 4th capacitance, one end of the 6th capacitance, Transient Suppression Diode respectively It connects, which is a DC output ends；The other end of third inductance is electric with DC input terminals, one end of the 5th capacitance, third respectively One end of appearance connects, and the other end of the 4th capacitance, the other end of the 6th capacitance, the anode of Transient Suppression Diode are electric with the 5th It is grounded after the other end connection of appearance, the other end ground connection of third capacitance；Wherein the first inductance, the second inductance and the first diode group At Unidirectional direct-current feed circuit.
- 2. a kind of prevention at radio-frequency port direct current tie line according to claim 1, it is characterised in that：First inductance and Two inductance use the ZBL5-757-148 type inductance of Guangdian Science ＆ Technology Co., Ltd., Zhejiang, or on the bar magnets of ZY3 × 12 The close enameled wire thick around 20 circle 0.5mm is made by oneself.
- 3. a kind of prevention at radio-frequency port direct current tie line according to claim 1, it is characterised in that：First diode is adopted With the 1N4007 series of diode of FAIRCHILD companies of the U.S..
- 4. a kind of prevention at radio-frequency port direct current tie line according to one of claims 1 to 3, it is characterised in that：It is described pressure-sensitive Resistance and Transient Suppression Diode form surge protection circuit.
- 5. a kind of prevention at radio-frequency port direct current tie line according to claim 4, it is characterised in that：The varistor uses The MYG20G07 series of oxidation zinc varistors of Shaanxi Hua Xing.
- 6. a kind of prevention at radio-frequency port direct current tie line according to claim 5, it is characterised in that：The transient state inhibits two poles Pipe uses the P6KE18A series of diode of FAIRCHILD companies of the U.S..
- 7. a kind of prevention at radio-frequency port direct current tie line according to claim 6, it is characterised in that：Second capacitance~the Six capacitances and third inductance are electric source filter circuit.
- 8. a kind of prevention at radio-frequency port direct current tie line according to claim 7, it is characterised in that：Second capacitance~the Four capacitances are the larger electrolytic capacitor of capacitance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721920111.XU CN207612115U (en) | 2017-12-29 | 2017-12-29 | Prevention at radio-frequency port direct current tie line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721920111.XU CN207612115U (en) | 2017-12-29 | 2017-12-29 | Prevention at radio-frequency port direct current tie line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207612115U true CN207612115U (en) | 2018-07-13 |
Family
ID=62799970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721920111.XU Expired - Fee Related CN207612115U (en) | 2017-12-29 | 2017-12-29 | Prevention at radio-frequency port direct current tie line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207612115U (en) |
-
2017
- 2017-12-29 CN CN201721920111.XU patent/CN207612115U/en not_active Expired - Fee Related
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| 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: 20180713 Termination date: 20201229 |
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| CF01 | Termination of patent right due to non-payment of annual fee |