CN202616765U - Gigabit Ethernet power supply overvoltage protector - Google Patents
Gigabit Ethernet power supply overvoltage protector Download PDFInfo
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- CN202616765U CN202616765U CN 201120559581 CN201120559581U CN202616765U CN 202616765 U CN202616765 U CN 202616765U CN 201120559581 CN201120559581 CN 201120559581 CN 201120559581 U CN201120559581 U CN 201120559581U CN 202616765 U CN202616765 U CN 202616765U
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Abstract
An embodiment of the utility model discloses a gigabit Ethernet power supply overvoltage protector. The protector comprises an input terminal and an output terminal which are connected through several lines that are used to transmit a power supply and a signal, and are used to input and output the power supply and the signal. The protector also comprises a main protection circuit and a rectification clamp circuit, wherein the main protection circuit is connected between a common line and the lines and is used to discharge lightning and an electromagnetic pulse; the rectification clamp circuit is connected between the two lines and is connected to the main protection circuit, and is formed by a rectifier bridge, a transient voltage suppressor diode and a fast recovery diode group and is used to ensure that a voltage difference between the lines is in a predetermined scope; the rectifier bridge and the transient voltage suppressor diode are mutually connected. According to the gigabit Ethernet power supply overvoltage protector of the embodiment of the utility model, through using the rectification clamp circuit formed by the rectifier bridge, the transient voltage suppressor diode and the fast recovery diode group, technology effects of simultaneous junction capacitance reduction, high reliability and less signal attenuation of the rectification clamp can be achieved, wherein the rectifier bridge and the transient voltage suppressor diode are mutually connected; and the fast recovery diode group possesses high-voltage resistant performance and the low junction capacitance.
Description
Technical field
The utility model relates to ethernet signal lightning protection field, relates in particular to a kind of gigabit Ethernet power supply overvoltage protector.
Background technology
Low pressure lightning protection industry is to follow the popularizing of modern electronic technology, information technology, development and the new industry of deriving out.Birth and development along with new electronic component; The high speed development of electric power and information industry; Electric power, railway, oil, communication, airport, national defence and finance etc. also present high speed development trend to the demand of meticulous lightning protection component; Especially in message transmitting procedure, siganl thunder-proof device also to be had higher requirement simultaneously, protective capability is strong, possess power delivery ability etc. possesses equal importance with signal transmission characteristics.
At present; Domestic employing be generally 10/100Mbps adaptive network siganl thunder-proof device, only protect 1/2,3/6 line, transient voltage restraining diode (Transient Voltage Suppressors is adopted in back level protection; TVS) because junction capacitance is excessive, very big to the decay of signal.
In addition, existing gigabit Ethernet overvoltage protector circuit is simple and crude, does not have due protective effect, has afterflow and heat to thread off on the circuit, and circuit is prone to short circuit to common wire.
The utility model content
The utility model embodiment technical problem to be solved is, provides a kind of and has high reliability, effectively prevents the gigabit Ethernet power supply overvoltage protector that is used for signal lighting protection of signal attenuation.
In order to solve the problems of the technologies described above; The utility model embodiment has proposed a kind of gigabit Ethernet power supply overvoltage protector; Comprise that said protector also comprises through circuit input, the output that be connected, that be respectively applied for input, out-put supply and signal of some transmission power supplys and signals: be connected between common wire and the said circuit, the main protection circuit of be used to release thunder and lightning and electromagnetic pulse; Be connected in twos between the circuit and be connected in main protection circuit, guarantee that voltage difference is at the rectification clamp circuit of preset range between each circuit by interconnective rectifier bridge, transient voltage restraining diode and fast recovery diode group being used to of constituting.
Further; Said number of, lines is eight, fast recovery diode group and transient voltage restraining diode T1 that the rectification clamp circuit comprises the first rectifier bridge BR1, the second rectifier bridge BR2, the 3rd rectifier bridge BR3, the 4th rectifier bridge BR4, is made up of the first fast recovery diode D1, the second fast recovery diode D2, the 3rd fast recovery diode D3 and the 4th fast recovery diode D4;
Wherein, the pin one of the first rectifier bridge BR1 is connected in the circuit 1 of output; The pin two of the first rectifier bridge BR1 is connected in the negative pole of the first fast recovery diode D1, the pin two of the second rectifier bridge BR2, the pin two of the 3rd rectifier bridge BR3, the pin two of the 4th rectifier bridge BR4 and the K end of transient voltage restraining diode T1 simultaneously; The positive pole of the first fast recovery diode D1 is connected in common wire; The pin 3 of the first rectifier bridge BR1 is connected in the circuit 2 of output; The pin 4 of the first rectifier bridge BR1 is connected in the pin 4 of the second rectifier bridge BR2, the pin 4 of the 3rd rectifier bridge BR3, the pin 4 of the 4th rectifier bridge BR4, the positive pole of the second fast recovery diode D2, the positive pole of the 3rd fast recovery diode D3 and the negative pole of the 4th fast recovery diode D4 simultaneously; The positive pole of the negative pole of the 3rd fast recovery diode D3, the 4th fast recovery diode D4 is connected in the A end of transient voltage restraining diode T1 jointly; The negative pole of the second fast recovery diode D2 is connected in common wire;
The pin 3 that the pin one of the second rectifier bridge BR2 is connected in circuit 3, the second rectifier bridge BR2 of output is connected in the circuit 6 of output;
The pin 3 that the pin one of the 3rd rectifier bridge BR3 is connected in circuit 5, the three rectifier bridge BR3 of output is connected in the circuit 4 of output;
The pin 3 that the pin one of the 4th rectifier bridge BR4 is connected in circuit 8, the four rectifier bridge BR4 of output is connected in the circuit 7 of output.
Further, main protection circuit is provided with and is used to guarantee that circuit does not have afterflow, prevents to be connected in the protection module of each circuit of input to public short-circuit between conductors, and protection module comprises interconnective discharge tube and piezo-resistance.
Further, said number of, lines is eight, and protection module is four, and wherein, in first protection module, the pin one of the first discharge tube G1 is connected in the circuit 2 of input; The pin two of the first discharge tube G1 is connected to the pin one of the first piezo-resistance RV1 and the pin one of the second piezo-resistance RV2, and the pin two of the pin two of the first piezo-resistance RV1 and the second piezo-resistance RV2 is connected in common wire jointly; The pin 3 of the first discharge tube G1 is connected in the circuit 1 of input; In second protection module, the pin one of the second discharge tube G2 is connected in the circuit 6 of input; The pin two of the second discharge tube G2 is connected to the pin one of the 3rd piezo-resistance RV3, the pin one of the 4th piezo-resistance RV4 and the pin one of the 5th piezo-resistance RV5, and the pin two of the pin two of the 3rd piezo-resistance RV3, the 4th piezo-resistance RV4 and the pin two of the 5th piezo-resistance RV5 are connected in common wire jointly; The pin 3 of the second discharge tube G2 is connected in the circuit 3 of input; In the 3rd protection module, the pin one of the 3rd discharge tube G3 is connected in the circuit 5 of input; The pin two of the 3rd discharge tube G3 is connected to the pin one of the 6th piezo-resistance RV6, the pin one of the 7th piezo-resistance RV7 and the pin one of the 8th piezo-resistance RV8, and the pin two of the pin two of the 6th piezo-resistance RV6, the 7th piezo-resistance RV7 and the pin two of the 8th piezo-resistance RV8 are connected in common wire jointly; The pin 3 of the 3rd discharge tube G3 is connected in the circuit 4 of input; In the 4th protection module, the pin one of the 4th discharge tube G4 is connected in the circuit 7 of input; The pin two of the 4th discharge tube G4 is connected to the pin one of the 9th piezo-resistance RV9 and the pin one of the tenth piezo-resistance RV10, and the pin two of the pin two of the 9th piezo-resistance RV9 and the tenth piezo-resistance RV10 is connected in common wire jointly; The pin 3 of the 4th discharge tube G4 is connected in the circuit 8 of input.
Further, also be provided with the decoupling circuit that is used for decoupling on the circuit between main protection circuit and the rectification clamp circuit.
Further, said number of, lines is eight, and decoupling circuit comprises first resistance R 1, second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7 and the 8th resistance R 8; Wherein, the pin one of first resistance R 1 and 2 is connected to the circuit 3 of input and the circuit 3 of output; The pin one of second resistance R 2 and 2 is connected to the circuit 6 of input and the circuit 6 of output; The pin one of the 3rd resistance R 3 and 2 is connected to the circuit 2 of input and the circuit 2 of output; The pin one of the 4th resistance R 4 and 2 is connected to the circuit 1 of input and the circuit 1 of output; The pin one of the 5th resistance R 5 and 2 is connected to the circuit 5 of input and the circuit 5 of output; The pin one of the 6th resistance R 6 and 2 is connected to the circuit 4 of input and the circuit 4 of output; The pin one of the 7th resistance R 7 and 2 is connected to the circuit 8 of input and the circuit 8 of output; The pin one of the 8th resistance R 8 and 2 is connected to the circuit 7 of input and the circuit 7 of output.
Further, first resistance R 1, second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7 and the 8th resistance R 8 adopt thermistors.
Further, also be provided with on the circuit between rectification clamp circuit and the output and be connected in twos between the circuit, be used for further guaranteeing that voltage difference is at the back level protection circuit of preset range between each circuit.
Further, said number of, lines is eight, and back level protection circuit comprises the first chip U1 and the second chip U2; Wherein, for the first chip U1, pin one and 8 is connected in the circuit 6 of output jointly, and pin two and 7 is connected in the circuit 3 of output jointly; Pin 3 and 6 is connected in the circuit 2 of output jointly; Pin 4 and 5 is connected in the circuit 1 of output jointly; For the second chip U2, pin one and 8 is connected in the circuit 8 of output jointly, and pin two and 7 is connected in the circuit 7 of output jointly; Pin 3 and 6 is connected in the circuit 5 of output jointly; Pin 4 and 5 is connected in the circuit 4 of output jointly.
Further, the interface of said input and output is the RJ45 interface.
The beneficial effect of the gigabit Ethernet power supply overvoltage protector of the utility model embodiment is: through adopting by interconnective rectifier bridge, transient voltage restraining diode and having the rectification clamp circuit that high pressure resistant, as to hang down junction capacitance fast recovery diode group constitutes; Thereby reduce junction capacitance when having reached the rectification clamper, the technique effect that reliability is high, signal attenuation is few; Further; Adopt discharge tube and piezo-resistance to form protection module and guaranteed that circuit does not have afterflow; Prevent circuit to public short-circuit between conductors, have simple in structure, anti-thunderbolt and thunder and lightning electric pulse ability is strong, residual voltage is low, the characteristics of the sensitive reliable and low cost of manufacture of work.
Description of drawings
Fig. 1 is the structure principle chart of the gigabit Ethernet power supply overvoltage protector of the utility model embodiment.
Fig. 2 is the circuit diagram of the gigabit Ethernet power supply overvoltage protector of the utility model embodiment.
Embodiment
Please refer to Fig. 1 ~ Fig. 2; The gigabit Ethernet power supply overvoltage protector of the utility model embodiment is for satisfy the protective circuit of power supply and gigabit ethernet signal transmission simultaneously; Comprise input 100, output 200 and be located at input 100 and output 200 between the level Four protection circuit, first to fourth grade of protection circuit is respectively main protection circuit 10, decoupling circuit 20, rectification clamp circuit 30 and back level protection circuit 40.Wherein, the PE line of circuit must link to each other with earth mat.
Be connected through some the circuits that are used to transmit power supply and signal between input 100 and the output 200, be respectively applied for input, out-put supply and signal.In this execution mode, said number of, lines is eight, and promptly circuit 1 ~ circuit 8, and in other execution modes, circuit is four, 16 etc.The interface of said input 100 and output 200 is the RJ45 interface.Thereby the signal processing path of the gigabit Ethernet power supply overvoltage protector of the utility model embodiment is: power supply and signal transfer to output 200 from input 100 inputs behind first to fourth grade of protection circuit, again from output 200 outputs.
First order protection circuit is the main protection circuit 10 of signal/power channel, and be used to release thunder and lightning and electromagnetic pulse are connected between said circuit and the common wire.Main protection circuit 10 is provided with and is used to guarantee that circuit does not have afterflow and threads off, prevents to be connected in the protection module of each circuit of input 100 to public short-circuit between conductors with heat, and protection module comprises interconnective discharge tube and piezo-resistance.And then; Discharge tube and piezo-resistance are formed protection module and have been guaranteed that circuit does not have afterflow and heat is threaded off; Effectively prevent 8 pairs of public short-circuits between conductors of circuit 1 ~ circuit, the gigabit Ethernet power supply overvoltage protector of the utility model embodiment has simple in structure, anti-thunderbolt and thunder and lightning electric pulse ability is strong, residual voltage is low, the work sensitivity is reliable and the characteristics of low cost of manufacture.
Protection module is four, and wherein, in first protection module, the pin one of the first discharge tube G1 is connected in the circuit 2 of input 100; The pin two of the first discharge tube G1 is connected to the pin one of the first piezo-resistance RV1 and the pin one of the second piezo-resistance RV2, and the pin two of the pin two of the first piezo-resistance RV1 and the second piezo-resistance RV2 is connected in common wire jointly; The pin 3 of the first discharge tube G1 is connected in the circuit 1 of input 100;
In second protection module, the pin one of the second discharge tube G2 is connected in the circuit 6 of input 100; The pin two of the second discharge tube G2 is connected to the pin one of the 3rd piezo-resistance RV3, the pin one of the 4th piezo-resistance RV4 and the pin one of the 5th piezo-resistance RV5, and the pin two of the pin two of the 3rd piezo-resistance RV3, the 4th piezo-resistance RV4 and the pin two of the 5th piezo-resistance RV5 are connected in common wire jointly; The pin 3 of the second discharge tube G2 is connected in the circuit 3 of input 100;
In the 3rd protection module, the pin one of the 3rd discharge tube G3 is connected in the circuit 5 of input 100; The pin two of the 3rd discharge tube G3 is connected to the pin one of the 6th piezo-resistance RV6, the pin one of the 7th piezo-resistance RV7 and the pin one of the 8th piezo-resistance RV8, and the pin two of the pin two of the 6th piezo-resistance RV6, the 7th piezo-resistance RV7 and the pin two of the 8th piezo-resistance RV8 are connected in common wire jointly; The pin 3 of the 3rd discharge tube G3 is connected in the circuit 4 of input 100;
In the 4th protection module, the pin one of the 4th discharge tube G4 is connected in the circuit 7 of input 100; The pin two of the 4th discharge tube G4 is connected to the pin one of the 9th piezo-resistance RV9 and the pin one of the tenth piezo-resistance RV10, and the pin two of the pin two of the 9th piezo-resistance RV9 and the tenth piezo-resistance RV10 is connected in common wire jointly; The pin 3 of the 4th discharge tube G4 is connected in the circuit 8 of input 100.
Second level protection circuit is a decoupling circuit 20, is located on the circuit between main protection circuit 10 and the rectification clamp circuit 30, is used to carry out decoupling.Decoupling circuit 20 comprises first resistance R 1, second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7 and the 8th resistance R 8;
Wherein, the pin one of first resistance R 1 and 2 is connected to the circuit 3 of input 100 and the circuit 3 of output 200; The pin one of second resistance R 2 and 2 is connected to the circuit 6 of input 100 and the circuit 6 of output 200; The pin one of the 3rd resistance R 3 and 2 is connected to the circuit 2 of input 100 and the circuit 2 of output 200; The pin one of the 4th resistance R 4 and 2 is connected to the circuit 1 of input 100 and the circuit 1 of output 200; The pin one of the 5th resistance R 5 and 2 is connected to the circuit 5 of input 100 and the circuit 5 of output 200; The pin one of the 6th resistance R 6 and 2 is connected to the circuit 4 of input 100 and the circuit 4 of output 200; The pin one of the 7th resistance R 7 and 2 is connected to the circuit 8 of input 100 and the circuit 8 of output 200; The pin one of the 8th resistance R 8 and 2 is connected to the circuit 7 of input 100 and the circuit 7 of output 200.In this execution mode, said resistance is common power resistance, and in another execution mode, first resistance R 1, second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7 and the 8th resistance R 8 adopt thermistors.
Third level protection circuit is a rectification clamp circuit 30; Be connected in twos between the circuit; And be connected on the circuit between decoupling circuit 20 and the back level protection circuit 40; Constitute by interconnective rectifier bridge, transient voltage restraining diode T1 and fast recovery diode group, be used to guarantee that voltage difference is at preset range between each circuit.Thereby; The fast recovery diode group D1 ~ D4 and the transient voltage restraining diode T1 that have high pressure resistant, low junction capacitance through employing cooperate; Effectively remedy the big problem of the excessive signal attenuation that brings of transient voltage restraining diode T1 junction capacitance, improved the signal transmission reliability.
Fast recovery diode group and transient voltage restraining diode T1 that rectification clamp circuit 30 comprises the first rectifier bridge BR1, the second rectifier bridge BR2, the 3rd rectifier bridge BR3, the 4th rectifier bridge BR4, is made up of the first fast recovery diode D1, the second fast recovery diode D2, the 3rd fast recovery diode D3 and the 4th fast recovery diode D4;
Wherein, the pin one of the first rectifier bridge BR1 is connected in the circuit 1 of output; The pin two of the first rectifier bridge BR1 is connected in the negative pole of the first fast recovery diode D1, the pin two of the second rectifier bridge BR2, the pin two of the 3rd rectifier bridge BR3, the pin two of the 4th rectifier bridge BR4 and the K end of transient voltage restraining diode T1 simultaneously; The positive pole of the first fast recovery diode D1 is connected in common wire; The pin 3 of the first rectifier bridge BR1 is connected in the circuit 2 of output; The pin 4 of the first rectifier bridge BR1 is connected in the pin 4 of the second rectifier bridge BR2, the pin 4 of the 3rd rectifier bridge BR3, the pin 4 of the 4th rectifier bridge BR4, the positive pole of the second fast recovery diode D2, the positive pole of the 3rd fast recovery diode D3 and the negative pole of the 4th fast recovery diode D4 simultaneously; The positive pole of the negative pole of the 3rd fast recovery diode D3, the 4th fast recovery diode D4 is connected in the A end of transient voltage restraining diode T1 jointly; The negative pole of the second fast recovery diode D2 is connected in common wire;
The pin 3 that the pin one of the second rectifier bridge BR2 is connected in circuit 3, the second rectifier bridge BR2 of output is connected in the circuit 6 of output;
The pin 3 that the pin one of the 3rd rectifier bridge BR3 is connected in circuit 5, the three rectifier bridge BR3 of output is connected in the circuit 4 of output;
The pin 3 that the pin one of the 4th rectifier bridge BR4 is connected in circuit 8, the four rectifier bridge BR4 of output is connected in the circuit 7 of output.
Fourth stage protection circuit is a back level protection circuit 40, is connected in twos between the circuit, and is located on the circuit between rectification clamp circuit 30 and the output 200, is used for further guaranteeing that voltage difference is at preset range between each circuit.
Back level protection circuit 40 comprises the first chip U1 and the second chip U2.Wherein, for the first chip U1, pin one and 8 is connected in the circuit 6 of output 200 jointly, and pin two and 7 is connected in the circuit 3 of output 200 jointly; Pin 3 and 6 is connected in the circuit 2 of output 200 jointly; Pin 4 and 5 is connected in the circuit 1 of output 200 jointly.
For the second chip U2, pin one and 8 is connected in the circuit 8 of output 200 jointly, and pin two and 7 is connected in the circuit 7 of output 200 jointly; Pin 3 and 6 is connected in the circuit 5 of output 200 jointly; Pin 4 and 5 is connected in the circuit 4 of output 200 jointly.
The above is the embodiment of the utility model; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; Can also make some improvement and retouching, these improvement and retouching also are regarded as the protection range of the utility model.
Claims (10)
1. a gigabit Ethernet power supply overvoltage protector comprises through circuit input, the output that be connected, that be respectively applied for input, out-put supply and signal of some transmission power supplys and signal, it is characterized in that said protector also comprises:
Be connected between common wire and the said circuit, the main protection circuit of be used to release thunder and lightning and electromagnetic pulse;
Be connected in twos between the circuit and be connected in main protection circuit, guarantee that voltage difference is at the rectification clamp circuit of preset range between each circuit by interconnective rectifier bridge, transient voltage restraining diode and fast recovery diode group being used to of constituting.
2. gigabit Ethernet power supply overvoltage protector as claimed in claim 1; It is characterized in that; Said number of, lines is eight, fast recovery diode group and transient voltage restraining diode T1 that the rectification clamp circuit comprises the first rectifier bridge BR1, the second rectifier bridge BR2, the 3rd rectifier bridge BR3, the 4th rectifier bridge BR4, is made up of the first fast recovery diode D1, the second fast recovery diode D2, the 3rd fast recovery diode D3 and the 4th fast recovery diode D4;
Wherein, the pin one of the first rectifier bridge BR1 is connected in the circuit 1 of output; The pin two of the first rectifier bridge BR1 is connected in the negative pole of the first fast recovery diode D1, the pin two of the second rectifier bridge BR2, the pin two of the 3rd rectifier bridge BR3, the pin two of the 4th rectifier bridge BR4 and the K end of transient voltage restraining diode T1 simultaneously; The positive pole of the first fast recovery diode D1 is connected in common wire; The pin 3 of the first rectifier bridge BR1 is connected in the circuit 2 of output; The pin 4 of the first rectifier bridge BR1 is connected in the pin 4 of the second rectifier bridge BR2, the pin 4 of the 3rd rectifier bridge BR3, the pin 4 of the 4th rectifier bridge BR4, the positive pole of the second fast recovery diode D2, the positive pole of the 3rd fast recovery diode D3 and the negative pole of the 4th fast recovery diode D4 simultaneously; The positive pole of the negative pole of the 3rd fast recovery diode D3, the 4th fast recovery diode D4 is connected in the A end of transient voltage restraining diode T1 jointly; The negative pole of the second fast recovery diode D2 is connected in common wire;
The pin 3 that the pin one of the second rectifier bridge BR2 is connected in circuit 3, the second rectifier bridge BR2 of output is connected in the circuit 6 of output;
The pin 3 that the pin one of the 3rd rectifier bridge BR3 is connected in circuit 5, the three rectifier bridge BR3 of output is connected in the circuit 4 of output;
The pin 3 that the pin one of the 4th rectifier bridge BR4 is connected in circuit 8, the four rectifier bridge BR4 of output is connected in the circuit 7 of output.
3. gigabit Ethernet power supply overvoltage protector as claimed in claim 1; It is characterized in that; Main protection circuit is provided with and is used to guarantee that circuit does not have afterflow, prevents to be connected in the protection module of each circuit of input to public short-circuit between conductors, and protection module comprises interconnective discharge tube and piezo-resistance.
4. gigabit Ethernet power supply overvoltage protector as claimed in claim 3 is characterized in that said number of, lines is eight, and protection module is four, and wherein, in first protection module, the pin one of the first discharge tube G1 is connected in the circuit 2 of input; The pin two of the first discharge tube G1 is connected to the pin one of the first piezo-resistance RV1 and the pin one of the second piezo-resistance RV2; The pin two of the pin two of the first piezo-resistance RV1 and the second piezo-resistance RV2 is connected in common wire jointly; The pin 3 of the first discharge tube G1 is connected in the circuit 1 of input;
In second protection module, the pin one of the second discharge tube G2 is connected in the circuit 6 of input; The pin two of the second discharge tube G2 is connected to the pin one of the 3rd piezo-resistance RV3, the pin one of the 4th piezo-resistance RV4 and the pin one of the 5th piezo-resistance RV5, and the pin two of the pin two of the 3rd piezo-resistance RV3, the 4th piezo-resistance RV4 and the pin two of the 5th piezo-resistance RV5 are connected in common wire jointly; The pin 3 of the second discharge tube G2 is connected in the circuit 3 of input;
In the 3rd protection module, the pin one of the 3rd discharge tube G3 is connected in the circuit 5 of input; The pin two of the 3rd discharge tube G3 is connected to the pin one of the 6th piezo-resistance RV6, the pin one of the 7th piezo-resistance RV7 and the pin one of the 8th piezo-resistance RV8, and the pin two of the pin two of the 6th piezo-resistance RV6, the 7th piezo-resistance RV7 and the pin two of the 8th piezo-resistance RV8 are connected in common wire jointly; The pin 3 of the 3rd discharge tube G3 is connected in the circuit 4 of input;
In the 4th protection module, the pin one of the 4th discharge tube G4 is connected in the circuit 7 of input; The pin two of the 4th discharge tube G4 is connected to the pin one of the 9th piezo-resistance RV9 and the pin one of the tenth piezo-resistance RV10, and the pin two of the pin two of the 9th piezo-resistance RV9 and the tenth piezo-resistance RV10 is connected in common wire jointly; The pin 3 of the 4th discharge tube G4 is connected in the circuit 8 of input.
5. gigabit Ethernet power supply overvoltage protector as claimed in claim 1 is characterized in that, also is provided with the decoupling circuit that is used for decoupling on the circuit between main protection circuit and the rectification clamp circuit.
6. gigabit Ethernet power supply overvoltage protector as claimed in claim 5; It is characterized in that; Said number of, lines is eight, and decoupling circuit comprises first resistance R 1, second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7 and the 8th resistance R 8;
Wherein, the pin one of first resistance R 1 and 2 is connected to the circuit 3 of input and the circuit 3 of output; The pin one of second resistance R 2 and 2 is connected to the circuit 6 of input and the circuit 6 of output; The pin one of the 3rd resistance R 3 and 2 is connected to the circuit 2 of input and the circuit 2 of output; The pin one of the 4th resistance R 4 and 2 is connected to the circuit 1 of input and the circuit 1 of output; The pin one of the 5th resistance R 5 and 2 is connected to the circuit 5 of input and the circuit 5 of output; The pin one of the 6th resistance R 6 and 2 is connected to the circuit 4 of input and the circuit 4 of output; The pin one of the 7th resistance R 7 and 2 is connected to the circuit 8 of input and the circuit 8 of output; The pin one of the 8th resistance R 8 and 2 is connected to the circuit 7 of input and the circuit 7 of output.
7. gigabit Ethernet power supply overvoltage protector as claimed in claim 6; It is characterized in that first resistance R 1, second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7 and the 8th resistance R 8 adopt thermistors.
8. gigabit Ethernet power supply overvoltage protector as claimed in claim 1; It is characterized in that, also be provided with on the circuit between rectification clamp circuit and the output and be connected in twos between the circuit, be used for further guaranteeing that voltage difference is at the back level protection circuit of preset range between each circuit.
9. gigabit Ethernet power supply overvoltage protector as claimed in claim 8 is characterized in that said number of, lines is eight, and back level protection circuit comprises the first chip U1 and the second chip U2;
Wherein, for the first chip U1, pin one and 8 is connected in the circuit 6 of output jointly, and pin two and 7 is connected in the circuit 3 of output jointly; Pin 3 and 6 is connected in the circuit 2 of output jointly; Pin 4 and 5 is connected in the circuit 1 of output jointly;
For the second chip U2, pin one and 8 is connected in the circuit 8 of output jointly, and pin two and 7 is connected in the circuit 7 of output jointly; Pin 3 and 6 is connected in the circuit 5 of output jointly; Pin 4 and 5 is connected in the circuit 4 of output jointly.
10. gigabit Ethernet power supply overvoltage protector as claimed in claim 1 is characterized in that the interface of said input and output is the RJ45 interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120559581 CN202616765U (en) | 2011-12-28 | 2011-12-28 | Gigabit Ethernet power supply overvoltage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120559581 CN202616765U (en) | 2011-12-28 | 2011-12-28 | Gigabit Ethernet power supply overvoltage protector |
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| CN202616765U true CN202616765U (en) | 2012-12-19 |
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| CN 201120559581 Expired - Lifetime CN202616765U (en) | 2011-12-28 | 2011-12-28 | Gigabit Ethernet power supply overvoltage protector |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104377677A (en) * | 2014-11-07 | 2015-02-25 | 南京信息工程大学 | Surge protection device of end-span method active Ethernet |
| CN104753048A (en) * | 2013-12-27 | 2015-07-01 | 中兴通讯股份有限公司 | POE power supply protection system and POE power supply protection method |
| CN110138189A (en) * | 2018-02-02 | 2019-08-16 | 安雷科技股份有限公司 | For the protection circuit of Ethernet and with the power supply end equipment for protecting circuit |
-
2011
- 2011-12-28 CN CN 201120559581 patent/CN202616765U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104753048A (en) * | 2013-12-27 | 2015-07-01 | 中兴通讯股份有限公司 | POE power supply protection system and POE power supply protection method |
| CN104377677A (en) * | 2014-11-07 | 2015-02-25 | 南京信息工程大学 | Surge protection device of end-span method active Ethernet |
| CN104377677B (en) * | 2014-11-07 | 2017-02-15 | 南京信息工程大学 | Surge protection device of end-span method active Ethernet |
| CN110138189A (en) * | 2018-02-02 | 2019-08-16 | 安雷科技股份有限公司 | For the protection circuit of Ethernet and with the power supply end equipment for protecting circuit |
| CN110138189B (en) * | 2018-02-02 | 2021-09-03 | 安雷科技股份有限公司 | Protection circuit for Ethernet and power supply end equipment with protection circuit |
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Address after: 518000 Guangdong city of Shenzhen province Pingshan large science and Technology Industrial Zone Road No. 3 building D401 Patentee after: Zhao Fujiang Address before: 518000 Guangdong, Shenzhen, Shahe West Road, tea light industrial park, building 3, building A, 2, Patentee before: Zhao Fujiang |
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