CN201584766U - Protector for ADSL modem - Google Patents
Protector for ADSL modem Download PDFInfo
- Publication number
- CN201584766U CN201584766U CN2009201811681U CN200920181168U CN201584766U CN 201584766 U CN201584766 U CN 201584766U CN 2009201811681 U CN2009201811681 U CN 2009201811681U CN 200920181168 U CN200920181168 U CN 200920181168U CN 201584766 U CN201584766 U CN 201584766U
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- CN
- China
- Prior art keywords
- zinc
- oxide piezoresistor
- adsl modem
- signal input
- line
- Prior art date
- 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 - Fee Related
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Abstract
The utility model relates to a protector for an ADSL modem, which realizes that interfering signals are detected by grounding a filtering inductor, a filtering capacitor and capacitors connected in series. A first zinc oxide varistor, a second zinc oxide varistor, a third varistor and a fourth varistor are grounded so as to release surging over voltage; and a fifth zinc oxide varistor and a sixth zinc oxide varistor are adopted to release the strong over voltage of an external power grid. The protector has simple structure, is easy to be manufactured in large scale, can effectively avoid that the ADSL modem is interfered by the strong electromagnetic signals, and can effectively avoid that the ADSL modem and subsequent equipment are damaged by lightning and strong over voltage in the power grid.
Description
Technical field
The utility model relates to field of electronic devices, especially a kind of ADSL Modem protector.
Background technology
Along with the raising of people's living standard, computer has entered common people house.Domestic consumer's online all is the ADSL access way that provides by telecom operators generally.Because the complexity of circuit, the influence as external factor such as electric power bar circuit overlap joint, cable TV, radio wave and thunders and lightnings can be incorporated into host computer by user outline with various electromagnetic interference.The former disturbs network signal can cause online to occur lost line easily, causes speed of download slow; The latter's lightning wave then can smash ADSL modulator (being commonly called as " cat ") and follow-up equipment, as computer.
The utility model content
The purpose of this utility model provides a kind of ADSL Modem protector, because outside electromagnetic interference easily causes network speed slack-off, reaches the problem that thunder and lightning can smash the ADSL Modem protector to solve.
In order to achieve the above object, the technical scheme that the utility model adopted is:
The ADSL Modem protector, include shell, it is characterized in that: be provided with protective circuit in the shell, described protective circuit includes two signal input lines that are connected with network detach device signal output part, with two output lines that are connected with the ADSL Modem signal input part, described signal input line and output line are connected electrically in the two ends of filter inductance respectively, be electrically connected with filter capacitor between the described signal input line, be connected to first respectively on described two output lines, second Zinc-oxide piezoresistor, also be connected to mutual series connection between the described output line and distinguish the electric capacity of ground connection, described first again, second Zinc-oxide piezoresistor also respectively correspondence be serially connected with the 3rd, ground connection after the 4th piezo-resistance; The electric capacity of described mutual series connection cooperates the deletion interference signal with filter inductance, filter capacitor, the described first and the 3rd Zinc-oxide piezoresistor, the second and the 4th Zinc-oxide piezoresistor difference corresponding matching separately discharge overvoltage surge; Also include positive and negative power line, described power line one end is connected to external electrical network, the other end is connected with the power end of ADSL Modem, also be connected to mutual series connection on the described positive and negative power line respectively and distinguish the 5th, the 6th Zinc-oxide piezoresistor of ground connection again, described the 5th, the 6th Zinc-oxide piezoresistor discharges the strong overvoltage of external electrical network.
Described ADSL Modem protector, it is: described signal input line is connected with the network detach device by the port on the shell, and described power line is introduced voltage by the AC12V port on the shell from external electrical network.
By protector, normal signal is passed through filter inductance, first Zinc-oxide piezoresistor, second Zinc-oxide piezoresistor to ADSL Modem to the ADSL signal from port.When being subjected to strong electromagnetic, the at first filtered capacitive bypass of signal, filter electric capacity by series connection mutually to greatly through filter inductance, interference signal all to be deleted, normal signal is transported to the back level.Thunder and lightning comes interim, lightning wave will pass through first Zinc-oxide piezoresistor, second Zinc-oxide piezoresistor to the, three Zinc-oxide piezoresistors, the 4th Zinc-oxide piezoresistor respectively, Zinc-oxide piezoresistor, the rapid short circuit of the 4th Zinc-oxide piezoresistor are low-resistance in moment the 3rd, overvoltage surge is released by earth connection, first Zinc-oxide piezoresistor, second Zinc-oxide piezoresistor end fast and are high resistant, thereby forceful electric power is kept outside of the door.Thunder and lightning the 3rd Zinc-oxide piezoresistor, the 4th Zinc-oxide piezoresistor later is high resistant, and first Zinc-oxide piezoresistor, second Zinc-oxide piezoresistor are low-resistance, recovers the passage operate as normal.Because thunder and lightning may be from electrical network; so design ADSL Modem power supply is also passed through by protector; power supply enters by the AC12V port; enter ADSL Modem from outlet; when lightning wave enters; the 5th Zinc-oxide piezoresistor, the pressure-sensitive device conducting of the 6th Zinc-oxide piezoresistor release strong overvoltage to greatly, thus the protection device security.
The utility model is simple in structure, is easy to large-scale production, can avoid ADSL Modem to be subjected to the interference of forceful electric power magnetic signal effectively, and can effectively avoid ADSL Modem and follow-up equipment to be smashed by the strong overvoltage in thunder and lightning and the electrical network.
Description of drawings
Fig. 1 is the utility model circuit diagram.
Embodiment
The ADSL Modem protector, include shell, be provided with protective circuit in the shell, protective circuit includes two signal input lines that are connected with network detach device signal output part, with two output lines that are connected with the ADSL Modem signal input part, signal input line and output line are connected electrically in the two ends of filter inductance B1 respectively, be electrically connected with filter capacitor C1 between the signal input line, be connected to first respectively on two output lines, the second Zinc-oxide piezoresistor R1, R2, also be connected to mutual series connection between the output line and distinguish the capacitor C 2 of ground connection again, C3, first, the second Zinc-oxide piezoresistor R1, R2 also respectively correspondence be serially connected with the 3rd, the 4th piezo-resistance R3, ground connection behind the R4; Capacitor C 2, the C3 of series connection cooperate the deletion interference signal with filter inductance B1, filter capacitor C1 mutually, and the first Zinc-oxide piezoresistor R1 and the 3rd Zinc-oxide piezoresistor R3, the second Zinc-oxide piezoresistor R2 and the 4th Zinc-oxide piezoresistor R4 difference corresponding matching separately discharge overvoltage surge; Also include positive and negative power line, power line one end is connected to external electrical network, the other end is connected with the power end of ADSL Modem, also be connected to mutual series connection on the positive and negative power line respectively and distinguish the 5th, the 6th Zinc-oxide piezoresistor R5, the R6 of ground connection again, the 5th, the 6th Zinc-oxide piezoresistor R5, R6 discharge the strong overvoltage of external electrical network.
Signal input line is connected with the network detach device by the port on the shell, and power line is introduced voltage by the AC12V port on the shell from external electrical network.
Claims (2)
1.ADSL modulator-demodulator protector, include shell, it is characterized in that: be provided with protective circuit in the shell, described protective circuit includes two signal input lines that are connected with network detach device signal output part, with two output lines that are connected with the ADSL Modem signal input part, described signal input line and output line are connected electrically in the two ends of filter inductance respectively, be electrically connected with filter capacitor between the described signal input line, be connected to first respectively on described two output lines, second Zinc-oxide piezoresistor, also be connected to mutual series connection between the described output line and distinguish the electric capacity of ground connection, described first again, second Zinc-oxide piezoresistor also respectively correspondence be serially connected with the 3rd, ground connection after the 4th piezo-resistance; The electric capacity of described mutual series connection cooperates the deletion interference signal with filter inductance, filter capacitor, the described first and the 3rd Zinc-oxide piezoresistor, the second and the 4th Zinc-oxide piezoresistor difference corresponding matching separately discharge overvoltage surge; Also include positive and negative power line, described power line one end is connected to external electrical network, the other end is connected with the power end of ADSL Modem, also be connected to mutual series connection on the described positive and negative power line respectively and distinguish the 5th, the 6th Zinc-oxide piezoresistor of ground connection again, described the 5th, the 6th Zinc-oxide piezoresistor discharges the strong overvoltage of external electrical network.
2. ADSL Modem protector according to claim 1, it is: described signal input line is connected with the network detach device by the port on the shell, and described power line is introduced voltage by the AC12V port on the shell from external electrical network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201811681U CN201584766U (en) | 2009-12-11 | 2009-12-11 | Protector for ADSL modem |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201811681U CN201584766U (en) | 2009-12-11 | 2009-12-11 | Protector for ADSL modem |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201584766U true CN201584766U (en) | 2010-09-15 |
Family
ID=42726779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201811681U Expired - Fee Related CN201584766U (en) | 2009-12-11 | 2009-12-11 | Protector for ADSL modem |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201584766U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018107568A1 (en) * | 2016-12-16 | 2018-06-21 | 宇龙计算机通信科技(深圳)有限公司 | Protection device, power supply device and terminal |
| CN111163992A (en) * | 2017-09-29 | 2020-05-15 | 西门子交通有限公司 | Design for monitoring network traffic arriving at signal towers |
-
2009
- 2009-12-11 CN CN2009201811681U patent/CN201584766U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018107568A1 (en) * | 2016-12-16 | 2018-06-21 | 宇龙计算机通信科技(深圳)有限公司 | Protection device, power supply device and terminal |
| CN111163992A (en) * | 2017-09-29 | 2020-05-15 | 西门子交通有限公司 | Design for monitoring network traffic arriving at signal towers |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100915 Termination date: 20121211 |