CN201733320U - Network equipment - Google Patents
Network equipment Download PDFInfo
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- CN201733320U CN201733320U CN2010202599166U CN201020259916U CN201733320U CN 201733320 U CN201733320 U CN 201733320U CN 2010202599166 U CN2010202599166 U CN 2010202599166U CN 201020259916 U CN201020259916 U CN 201020259916U CN 201733320 U CN201733320 U CN 201733320U
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- power supply
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Abstract
Network equipment comprises a power conversion circuit, a first capacitor, a power failure sensing circuit and a digital signal processor. The first capacitor stores electric power and discharges power when a power source is interrupted. The power failure sensing circuit senses whether the power source is interrupted or not, generates a notification signal when the power source is interrupted and comprises a diode, a first resistor, a second capacitor and a comparator. An anode of the diode is connected with the power source. One end of the first resistor is connected with a cathode of the diode while the other end is grounded. The second capacitor is parallelly connected with the first resistor. The comparator comprises a first input end, a second input end and an output end, the first input end is connected with the cathode of the diode, the second input end is connected with the power source, and the output end outputs the notification signal. The digital signal processor receives the notification signal, is powered via the first capacitor by aid of discharge of the power conversion circuit and generates a power-off signal. The network equipment can accurately and fast detect the power failure condition and adopt the smaller first capacitor to supply power, thereby reducing cost and saving space.
Description
Technical field
The utility model relates to the network equipment, particularly a kind of network equipment that produces the outage signal.
Background technology
To the sharp increase of internet (Internet) information requirement, promote the further popularization of wideband switch-in business to reach universal.Digital Subscriber Line (DSL) technology having suitable advantage aspect the deployment convenience and the ratio of performance to price, has become main broadband access method through constantly development at present in the world.
ADSL (Asymmetric Digital Subscriber Line) (ADSL) is the most general a kind of in the current DSL technology, and the ADSL ustomer premises access equipment need be configured according to the situation of local side apparatus, monitor, safeguards and upgrade.G.992.1, ADSL international standard ITU (International Telecommunications Union) stipulates, when the ADSL ustomer premises access equipment is under power-off or other dead electricity situation, the ADSL ustomer premises access equipment must produce a power-off signal (Dying GASP), and via the online Embedded Operations Channel of ADSL (Embedded OperationChannel, EOC) transmit power-off signal to the ADSL local side apparatus, so that the webmaster personnel judge the foundation that goes up as the ADSL network failure.
Yet the ADSL ustomer premises access equipment is not having under the situation of electric power, can't operate and send this power-off signal.Thereby only in outage moment, the detecting outage condition is also utilized energy storage component on the ADSL ustomer premises access equipment, as electric capacity, provides the electric power that produces power-off signal.Usually, the outage circuit for detecting utilizes bleeder circuit detecting power supply and compares the judgement of whether cutting off the power supply with fixed reference potential.And because the existence of error makes the outage circuit for detecting can not in time detect the generation of outage condition.
The utility model content
In view of this, need provide a kind of network equipment, be used in time detecting outage condition and producing power-off signal.
A kind of network equipment by the power supply power supply, comprises power-switching circuit, first electric capacity, outage sensing circuit and digital signal processor.Power-switching circuit is used to change the power supply signal of described power supply.First electric capacity links to each other with described power supply, is used to store electric weight, and discharges when described power cut-off.Whether the outage sensing circuit is used for the described power supply of sensing and cuts off the power supply, and when described power cut-off, produces notification signal, comprises diode, first resistance, second electric capacity and comparator.The anode of diode links to each other with described power supply.First resistance, one end connects the negative electrode of described diode, other end ground connection.Second electric capacity is in parallel with described first resistance.Comparator comprises first input end, second input and output, and described first input end connects the negative electrode of described diode, and described second input connects described power supply, and described output is exported described notification signal.Digital signal processor links to each other with described power-switching circuit and described outage sensing circuit, be used for when described power cut-off, receive described notification signal, and power via the discharge of described power-switching circuit, and produce power-off signal by described first electric capacity.
Preferably, the described second capacitance discharges time is greater than the described first capacitance discharges time.
Preferably, described outage sensing circuit also comprises second resistance, be series between the negative electrode and described first input end of described diode, and between described first resistance and described second electric capacity.
Preferably, the network equipment also comprises peripheral cell, links to each other with described power-switching circuit and digital signal processor, and described digital signal processor also is used for when receiving described notification signal, makes described peripheral cell enter battery saving mode.
Preferably, the network equipment also comprises transceiver module, is used to send described power-off signal to local side apparatus.
The above-mentioned network equipment judges via the voltage on the relatively power source voltage and second electric capacity whether power supply cuts off the power supply, and has reduced error, can be accurately and comparatively fast detect the generation of outage condition.Thereby, can utilize the first less capacitances to supply power to give digital signal processor, produce power-off signal, reduce cost and save the space.
Description of drawings
Fig. 1 is the schematic diagram of the network equipment in the utility model first execution mode;
Fig. 2 is the circuit diagram of the network equipment of the utility model first execution mode;
Fig. 3 is the circuit diagram of the network equipment of the utility model second execution mode; And
Fig. 4 is the schematic diagram of the network equipment in the utility model second execution mode.
The main element symbol description
The network equipment 20,30,40
Power-switching circuit 200
First capacitor C 1
Outage sensing circuit 220,320
Diode D
First resistance R 1
Second capacitor C 2
Second resistance R 2
Peripheral cell 430
Transceiver module 440
Power supply signal Vin
Embodiment
Fig. 1 is the schematic diagram of the network equipment 20 first execution modes that the utility model proposes.In the present embodiment, the network equipment 20 is an ADSL (Asymmetric Digital Subscriber Line) (ADSL) ustomer premises access equipment, by power supply 10 power supplies, is used for producing outage (dying gasp) signal.The network equipment 20 comprises power-switching circuit 200, digital signal processor 210, outage sensing circuit 220 and first capacitor C 1.Power-switching circuit 200 is used for the power supply signal Vin of power supply 10 inputs is converted to suitable power supply signal, is digital signal processor 210 power supplies.In the present embodiment, power-switching circuit 200 is a DC-DC converter, be used for the dc power signal of power supply 10 inputs is converted to the dc power signal of appropriate drive digital signal processor 210, for example, the dc power signal of 12V be converted to the dc power signal of 3.3V or 5V.First capacitor C 1 links to each other with power supply 10, is used to store electric weight, and discharge when power supply 10 outages, via power-switching circuit 200 to be digital signal processor 210 power supplies.
Whether outage sensing circuit 220 is used for sensing power supply 10 and cuts off the power supply, and when power supply 10 outages, produces notification signal.In the present embodiment, notification signal is the logic high low level signal.Digital signal processor 210 and power-switching circuit 200 and outage sensing circuit 220 link to each other, be used for when power supply 10 outages, and the reception notification signal, and power via the discharge of power-switching circuit 200 by first electric capacity 10, and the generation power-off signal.In the present embodiment, digital signal processor 210 is a central processing unit.
Figure 2 shows that the circuit diagram of the network equipment 20 in the utility model first execution mode.In the present embodiment, outage sensing circuit 220 comprises diode D, first resistance R 1, second capacitor C 2 and comparator 2200.Comparator 2200 comprises first input end, second input and output.First input end connects power supply 10, the second inputs via diode D and directly connects power supply 10, and output output notice signal is to digital signal processor 210.First resistance R 1 and second capacitor C 2 are parallel between the first input end of the negative electrode of diode D and comparator 2200, and the homogeneous end is connected between the negative electrode and described first input end of described diode D other end ground connection.In the present embodiment, the discharge time of second capacitor C 2 is greater than the discharge time of first capacitor C 1.
When power supply 10 just often, the charging of first capacitor C 1, the voltage of second input equals the voltage of the power supply signal Vin of power supply 10.At this moment, diode D conducting, second capacitor C 2 is also charged.Because the pressure drop of diode D, for example, 0.6V, the voltage of first input end be less than the voltage of the power supply signal Vin of power supply 10, promptly less than the voltage of second input.
When power supply 10 outages, diode D ends, and first capacitor C 1 is via power-switching circuit 200 discharges, and second capacitor C 2 is via 1 discharge of first resistance R.Because the discharge time of second capacitor C 2 is greater than the discharge time of first capacitor C 1, thereby, after a bit of time, for example, 0.5ms, the discharge voltage of second capacitor C 2 begins the discharge voltage greater than first capacitor C 1, promptly the voltage of second input is less than first input end voltage, be different from power supply 10 situation just often, comparator 2200 detects the outage of power supply 10, produces notification signal and is sent to digital signal processor 210.Digital signal processor 210 utilizes the discharge of first capacitor C 1 via power-switching circuit 200, produces power-off signal.
The network equipment 20 in the present embodiment judges via voltage that compares power supply 10 and the voltage on second capacitor C 2 whether power supply 10 cuts off the power supply, and has avoided the error that adopts bleeder circuit and fixed reference potential to bring.Thereby, after power supply 10 outage, can be accurately and comparatively fast detect the generation of outage condition, so, can utilize less first capacitor C, 1 power supply to give digital signal processor 210, produce power-off signal, reduce cost and save the space.
Figure 3 shows that the circuit diagram of the utility model second execution mode network equipment 30.The network equipment 30 in the present embodiment is with the difference of the network equipment among Fig. 2 20 be the to cut off the power supply physical circuit difference of sensing circuit 320, and all the other frameworks and annexation are identical, repeat no more herein.Outage sensing circuit 320 is also to comprise second resistance R 2 with the difference of outage sensing circuit 220, second resistance R 2 is series between the first input end of the negative electrode of diode D and comparator 2200, and second resistance R 2 is between first resistance R 1 and second capacitor C 2.Second resistance R 2 and second capacitor C 2 are formed low pass filters, are used for the pulse voltage of filtering sudden change, thereby avoid the false judgment that pulse voltage caused of suddenling change.
Figure 4 shows that the schematic diagram of the utility model second execution mode network equipment 40.The difference of the network equipment 20 is that the network equipment 40 also comprises peripheral cell 430 and transceiver module 440 among the network equipment 40 in the present embodiment and Fig. 1.Peripheral cell 430 and transceiver module 440 all link to each other with power-switching circuit 200 and digital signal processor 210.Transceiver module 440 is used to send the power-off signal of digital signal processor 210 generations to local side apparatus.Digital signal processor 210 also is used for when receiving notification signal, make peripheral cell 430 enter battery saving mode, make 1 of the capacitor C of winning need discharge to supply with digital signal processor 210 and transceiver module 440, thereby reduce the overall power consumption of the network equipment 40, further reduce the appearance value of first capacitor C 1.Wherein, the physical circuit of the outage sensing circuit 220 of the network equipment 40 also comprises Fig. 2 and two kinds of execution modes shown in Figure 3.
Claims (5)
1. a network equipment by the power supply power supply, comprises power-switching circuit, is used to change the power supply signal of described power supply, it is characterized in that the described network equipment also comprises:
First electric capacity links to each other with described power supply, is used to store electric weight, and discharges when described power cut-off;
Whether the outage sensing circuit is used for the described power supply of sensing and cuts off the power supply, and when described power cut-off, produces notification signal, comprising:
Diode, anode links to each other with described power supply;
First resistance, an end connects the negative electrode of described diode, other end ground connection;
Second electric capacity, in parallel with described first resistance; And
Comparator comprises first input end, second input and output, and described first input end connects the negative electrode of described diode, and described second input connects described power supply, and described output is exported described notification signal; And
Digital signal processor, link to each other with described power-switching circuit and described outage sensing circuit, be used for when described power cut-off, receiving described notification signal, and power via the discharge of described power-switching circuit, and produce power-off signal by described first electric capacity.
2. the network equipment as claimed in claim 1 is characterized in that, the described second capacitance discharges time is greater than the described first capacitance discharges time.
3. the network equipment as claimed in claim 1 is characterized in that, described outage sensing circuit also comprises second resistance, be series between the negative electrode and described first input end of described diode, and between described first resistance and described second electric capacity.
4. the network equipment as claimed in claim 1, it is characterized in that, also comprise peripheral cell, link to each other with described power-switching circuit and digital signal processor, described digital signal processor also is used for when receiving described notification signal, makes described peripheral cell enter battery saving mode.
5. the network equipment as claimed in claim 1 is characterized in that, also comprises transceiver module, is used to send described power-off signal to local side apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202599166U CN201733320U (en) | 2010-07-15 | 2010-07-15 | Network equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202599166U CN201733320U (en) | 2010-07-15 | 2010-07-15 | Network equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201733320U true CN201733320U (en) | 2011-02-02 |
Family
ID=43524475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202599166U Expired - Fee Related CN201733320U (en) | 2010-07-15 | 2010-07-15 | Network equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201733320U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801536A (en) * | 2011-05-27 | 2012-11-28 | 国基电子（上海）有限公司 | Network communication equipment |
| CN113890151A (en) * | 2021-10-08 | 2022-01-04 | 茂硕电源科技股份有限公司 | Energy-saving circuit, device and equipment |
-
2010
- 2010-07-15 CN CN2010202599166U patent/CN201733320U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801536A (en) * | 2011-05-27 | 2012-11-28 | 国基电子（上海）有限公司 | Network communication equipment |
| CN102801536B (en) * | 2011-05-27 | 2014-12-10 | 国基电子（上海）有限公司 | Network communication equipment |
| CN113890151A (en) * | 2021-10-08 | 2022-01-04 | 茂硕电源科技股份有限公司 | Energy-saving circuit, device and equipment |
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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: 20110202 Termination date: 20110715 |