CN201528202U - RF DC isolation high-voltage protection converter - Google Patents
RF DC isolation high-voltage protection converter Download PDFInfo
- Publication number
- CN201528202U CN201528202U CN2009202108439U CN200920210843U CN201528202U CN 201528202 U CN201528202 U CN 201528202U CN 2009202108439 U CN2009202108439 U CN 2009202108439U CN 200920210843 U CN200920210843 U CN 200920210843U CN 201528202 U CN201528202 U CN 201528202U
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- China
- Prior art keywords
- capacitor
- internal circuit
- signal
- output
- inductance
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
Abstract
The utility model relates to an RF (Radio Frequency) DC (direct current) isolation high-voltage protection converter, and aims to remove the DC component during the signal transmission of power-down cables, compensate for the impedance loss of transmission lines, and simultaneously prevent the transmission lines from being damaged by large signals, high-voltage thunder and lightning and the like. The converter is used for cable signal transmission, and comprises a converter main body, a signal input device and a signal output device, wherein a circuit board is arranged in the converter main body; an internal circuit is arranged on the circuit board; the signal input device is connected with the input terminal of the internal circuit; the signal output device is connected with the output terminal of the internal circuit; the internal circuit comprises a capacitor C1, a capacitor C2, a capacitor C3 and an inductor L; an input terminal of the capacitor C2 is connected with the input terminal of the internal circuit; the output terminal of the capacitor C2 is connected with the output terminal of the internal circuit; one end of the inductor L is connected with the output terminal of the capacitor C2, and the other end thereof is grounded; and one end of the capacitor C1 is connected between the inductor L and the ground, the other end thereof is grounded, and the capacitor C3 is connected in the manner corresponding to that of the capacitor C1.
Description
Technical field
The utility model relates to radio frequency cable line signal transmission switching technique field, relates to a kind of radio frequency DC-isolation high voltage protection transducer specifically.
Background technology
Can transmission signals by the radio frequency cable line, but come with some shortcomings in the existing technology, thereby can influence signal transmission quality: the one, reach the existence that receiver has flip-flop in the cable transmission signals, therefore can cause certain injury to signal transmitter and receiver, thereby influence signal transfer quality; The 2nd, particularly the transfer lead-in wire length of transmission line of transmission line can reduce the impedance of transmission line, thereby and not matching of impedance has increased the quality that the loss of transmission line influence receives.In addition, power induction, high pressure and thunderbolt can injure receiver, and serious situation can cause the damage of receiver.
The utility model content
The purpose of this utility model provides a kind of radio frequency DC-isolation high voltage protection transducer, and the flip-flop when this transducer can be got rid of the transmission of cable signal also compensates the transmission line impedance consume, can avoid suffering simultaneously the injury of large-signal and high pressure thunder and lightning etc.
The purpose of this utility model is achieved in that
A kind of radio frequency DC-isolation high voltage protection transducer, be used for the transmission of cable signal, comprise: switch main body, signal input apparatus and signal output apparatus, the inside of described switch main body is provided with wiring board, described wiring board is provided with internal circuit, described signal input apparatus is connected with the input of described internal circuit, and described signal output apparatus is connected with the output of described internal circuit; Described internal circuit comprises capacitor C 1, capacitor C 2, capacitor C 3 and inductance L, the input of described capacitor C 2 links to each other with the input of described internal circuit, the output of described capacitor C 2 links to each other with the output of described internal circuit, one end of described inductance L is connected with the output of capacitor C 2, the other end ground connection of described inductance L, described capacitor C 1 one ends connect between inductance L and the ground connection, other end ground connection, symmetry characteristic for the balance coaxial transmission line, corresponding with capacitor C 1, one end of described capacitor C 3 connects between inductance L and the ground connection, other end ground connection.
Further, be provided with insulation crust in described switch main body outside.
Preferably, described signal input apparatus is the standard input socket; Described signal output apparatus is the standard output plug.
The utility model is owing to adopted technique scheme, make it compared with prior art, have the following advantages and good effect: after having used the utility model radio frequency DC-isolation high voltage protection transducer, can get rid of the flip-flop in transmission of cable signal or the receiver; The impedance that simultaneously can the compensating cable line in the signal transmission, be reduced; And meet with large-signal or high pressure thunderstorm hour, the utility model radio frequency DC-isolation high voltage protection transducer can play protective action, prevents large-signal or the high pressure thunder and lightning is transferred on the receiver, causes the damage of receiver.
Description of drawings
To embodiment of the present utility model and in conjunction with the description of its accompanying drawing, can further understand the purpose of this utility model, specific structural features and advantage by following.Wherein, accompanying drawing is:
Fig. 1 is the structural representation of embodiment of the present utility model;
Fig. 2 is the electrical block diagram of embodiment of the present utility model.
Embodiment
Present embodiment radio frequency DC-isolation high voltage protection transducer as shown in Figure 1 and Figure 2, comprise: switch main body 2, signal input apparatus and signal output apparatus, the outside of switch main body 2 is provided with insulation crust 1, in the present embodiment, signal input apparatus is a standard input socket 3, and signal output apparatus is a standard output plug 4.The inside of switch main body 2 is provided with wiring board 5, and wiring board 5 is provided with internal circuit, and signal input apparatus 2 is connected with the input of internal circuit, and signal output apparatus 3 is connected with the output of internal circuit.Wherein, internal circuit comprises capacitor C 1 (withstand voltage 2KV), capacitor C 2 (withstand voltage 2KV), capacitor C 3 (withstand voltage 2KV) and inductance L, the input of capacitor C 2 links to each other with the input of internal circuit, the output of capacitor C 2 links to each other with the output of internal circuit, one end of inductance L is connected with the output of capacitor C 2, the other end ground connection of inductance L, capacitor C 1 one ends connect between inductance L and the ground connection, other end ground connection, symmetry characteristic for the balance coaxial transmission line, corresponding with capacitor C 1, an end of capacitor C 3 connects between inductance L and the ground connection, other end ground connection.
Inductance L and capacitor C 2 constitute a L type single-stage high pass filter, reach the effect of impedance matching simultaneously, are used for the loss of compensating signal transmission middle impedance.Requirement according to transmission line:
A. impedance 75 Ω
B. transmission frequency: 40MHz～860MHz
C. cut-off frequency: 12000MHZ
Calculate:
Inductance L (￠ 0.25* ￠ 2.5*18T ≈ 5.28nH)
Capacitor C 2 (940～965Pf)
Z0＝(L/C)
-2≈75Ω
When large-signal or when suffering the high pressure thunderbolt, capacitor C 2 and inductance L have been formed a loop that isolates and release.Big voltage between the input of the isolated signals transmission of capacitor C 2 and the output, the very little part voltage that capacitor C 2 is leaked by inductance L over the ground conducting release, while capacitor C 1, capacitor C 3 have been isolated the induced voltage between the earth connection.
Claims (4)
1. a radio frequency DC-isolation high voltage protection transducer is used for the transmission of cable signal, it is characterized in that, comprising:
Switch main body, signal input apparatus and signal output apparatus, the inside of described switch main body is provided with wiring board, described wiring board is provided with internal circuit, described signal input apparatus is connected with the input of described internal circuit, and described signal output apparatus is connected with the output of described internal circuit;
Described internal circuit comprises capacitor C 1, capacitor C 2, capacitor C 3 and inductance L, the input of described capacitor C 2 links to each other with the input of described internal circuit, the output of described capacitor C 2 links to each other with the output of described internal circuit, one end of described inductance L is connected with the output of capacitor C 2, the other end ground connection of described inductance L, described capacitor C 1 one ends connect between inductance L and the ground connection, other end ground connection, corresponding with capacitor C 1, one end of described capacitor C 3 connects between inductance L and the ground connection, other end ground connection.
2. radio frequency DC-isolation high voltage protection transducer as claimed in claim 1, it is characterized in that: described switch main body outside is provided with insulation crust.
3. radio frequency DC-isolation high voltage protection transducer as claimed in claim 1, it is characterized in that: described signal input apparatus is the standard input socket.
4. radio frequency DC-isolation high voltage protection transducer as claimed in claim 1, it is characterized in that: described signal output apparatus is the standard output plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202108439U CN201528202U (en) | 2009-10-16 | 2009-10-16 | RF DC isolation high-voltage protection converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202108439U CN201528202U (en) | 2009-10-16 | 2009-10-16 | RF DC isolation high-voltage protection converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201528202U true CN201528202U (en) | 2010-07-14 |
Family
ID=42519484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202108439U Expired - Lifetime CN201528202U (en) | 2009-10-16 | 2009-10-16 | RF DC isolation high-voltage protection converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201528202U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9136701B2 (en) | 2013-05-28 | 2015-09-15 | Chit Shun Catv Equipment Limited | High voltage discharge protection device and radio frequency transmission apparatus using the same |
-
2009
- 2009-10-16 CN CN2009202108439U patent/CN201528202U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9136701B2 (en) | 2013-05-28 | 2015-09-15 | Chit Shun Catv Equipment Limited | High voltage discharge protection device and radio frequency transmission apparatus using the same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100714 |
|
| CX01 | Expiry of patent term |