CN207283569U - Ethernet interface telecommunication circuit without network transformer - Google Patents
Ethernet interface telecommunication circuit without network transformer Download PDFInfo
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- CN207283569U CN207283569U CN201720945054.4U CN201720945054U CN207283569U CN 207283569 U CN207283569 U CN 207283569U CN 201720945054 U CN201720945054 U CN 201720945054U CN 207283569 U CN207283569 U CN 207283569U
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Abstract
Ethernet technology field is the utility model is related to, more particularly to a kind of Ethernet interface telecommunication circuit of no network transformer, including：Chip, signal processing module and the RJ45 connectors of the function containing PHY；The chip of the function containing PHY is connected by signal processing module with RJ45 connectors.The Ethernet interface telecommunication circuit of no network transformer provided by the utility model, since the chip of the function containing PHY is connected by signal processing module with RJ45 connectors, the telecommunication circuit does not contain network transformer, only signal processing module is provided with discrete electronic device, placement-and-routing is flexible, reduce cost and fabric swatch space, be conducive to product miniaturization, portable design and user experience, it can be used in the application scenarios of some limited spaces or modernization intelligent construction, be easy to implement the popularization and application of equipment.
Description
Technical field
It the utility model is related to ethernet technology field, the Ethernet interface communication electricity of more particularly to a kind of no network transformer
Road.
Background technology
Ethernet is as present most widely used LAN, it then follows IEEE802.3 protocol requirements, including standard ethernet
(10Mbit/s), Fast Ethernet (100Mbit/s), gigabit Ethernet (1000Mbit/s) and 10G (10Gbit/s) ether
Net.Gigabit Ethernet even 10G Ethernets constantly expand application range under just being promoted in world market at present, and quantity is all with day
Increase.But in traditional basic application circuit of Ethernet interface, in order to meet high_voltage isolation, prevent that electromagnetic interference and long range are logical
The requirement of letter, network transformer are connected between the chip of the function containing PHY and RJ45 connectors, have become indispensable one
Part, can bear differential mode 500V, common mode 1KV lightning surges, protect the chip of the function containing PHY, support the letter up to 100m cables
Signal communication.However, in the application scenarios of the limited spaces such as some corridors or modernization intelligent construction, operator is for setting
The demand of standby miniaturization is more and more stronger, and network transformer size is larger, occupies equipment larger space.
In traditional ethernet mouth application circuit, network transformer all employ bar none, it is small-sized for some needs
Change, the product of portability design, network transformer occupies larger space, the complexity of increase product layout wiring, product by
It is limited to the area that only remains and more functions can not be added, is unfavorable for the experience of user.Moreover, the use of network transformer
The cost of product is undoubtedly added, especially for the application scenarios of multiple network interface demands, cost factor will be unfavorable for the reality of equipment
Now and promote.
Utility model content
The utility model solves in the prior art by providing a kind of Ethernet interface telecommunication circuit of no network transformer
Ethernet interface is using technical problem of high cost caused by network transformer, occupied space is big, using no network transformer
Ethernet communication circuit, reduces cost and fabric swatch space, is easy to implement the popularization and application of equipment and other expanded functions.
The utility model provides a kind of Ethernet interface telecommunication circuit of no network transformer, including：The function containing PHY
Chip, signal processing module and RJ45 connectors；
The chip of the function containing PHY is connected by the signal processing module with the RJ45 connectors.
Further, the signal processing module includes：Termination power；
P line ends mouth and N line end mouths, the P line ends mouth and the N line ends mouth structure are set in the chip of the function containing PHY
Into data difference separated time pair；
The signal processing module is provided with the input of the first P lines and output port, the input of the first N lines and output port, the
Two P lines input and output port and the input of the 2nd N lines and output port；First P lines input and output port and described the
One N lines are inputted forms data difference separated time pair with output port, and the 2nd P lines input is defeated with output port and the 2nd N lines
Enter and form data difference separated time pair with output port；The RJ45 connectors are provided with the network port；
The P line ends mouth is inputted with the first P lines and is connected with output port, the first P lines input and output port
It is connected with the termination power；The termination power is inputted with the 2nd P lines and is connected with output port；The 2nd P lines are defeated
Enter and be connected with output port with the network port；
The N line ends mouth is inputted with the first N lines and is connected with output port, the first N lines input and output port
It is connected with the termination power；The termination power is inputted with the 2nd N lines and is connected with output port；The 2nd N lines are defeated
Enter and be connected with output port with another network port.
Further, the signal processing module further includes：Common mode filtering circuit；
The common mode filtering circuit be connected to the 2nd P lines input and output port and the 2nd N lines input with it is defeated
Between exit port.Further, the termination power is DC coupling circuit or ac-coupled circuit；
If the termination power is DC coupling circuit, the termination power includes：First capacitance and the second capacitance；It is described
One end of first capacitance inputs with the first P lines and is connected with output port, the other end of first capacitance and the 2nd P
Line input is connected with output port；One end of second capacitance and the first N lines are inputted to be connected with output port, and described the
The other end of two capacitances is inputted with the 2nd N lines and is connected with output port；
If the termination power is ac-coupled circuit, the termination power includes：6th resistance and the 7th resistance；It is described
One end of 6th resistance and the first P lines are inputted to be connected with output port, the other end of the 6th resistance and described the
The input of two P lines is connected with output port；One end of 7th resistance inputs with the first N lines and is connected with output port, institute
The other end for stating the 7th resistance is connected with the 2nd N lines input with output port.
Further, the signal processing module further includes：Lightning Protection circuit；
The termination power passes through the lightning Protection circuit and the 2nd P lines input and output port and the N lines
Input is connected with output port.
Further, the lightning Protection circuit is at least level-one.
Further, the lightning Protection circuit includes：First order lightning Protection circuit and second level lightning Protection circuit；
The first order lightning Protection circuit includes：First resistor, second resistance and the first transient voltage suppressor diode；Described second
Level lightning Protection circuit includes：3rd resistor, the 4th resistance and the second transient voltage suppressor diode；
One end of the first resistor and first capacitance connection, the other end of the first resistor pass through the described 3rd
Resistance is inputted with the 2nd P lines and is connected with output port；
One end of the second resistance and second capacitance connection, the other end of the second resistance pass through the described 4th
Resistance is inputted with the 2nd N lines and is connected with output port；
One end of first transient voltage suppressor diode is connected between the second resistance and the 4th resistance,
The other end of first transient voltage suppressor diode is connected between the first resistor and the 3rd resistor；
One end of second transient voltage suppression diode inputs with the 2nd P lines and is connected with output port, described
The other end of second transient voltage suppressor diode is inputted with the 2nd N lines and is connected with output port.
Further, the resistance value of the first resistor, second resistance, 3rd resistor and the 4th resistance is greater than or equal to
0。
Further, the common mode filtering circuit includes：First inductance, the second inductance, the 5th resistance, the 3rd capacitance and
Four capacitances；
One end of first inductance and the 2nd P lines are inputted to be connected with output port, first inductance it is another
End is inputted with the 2nd N lines by second inductance and is connected with output port；
One end of 5th resistance is connected between first inductance and second inductance, the 5th resistance
The other end passes through the 3rd capacity earth；4th capacitance is connected in parallel with the 3rd capacitance.
One or more technical solution provided by the utility model, at least possesses following beneficial effect or advantage：
The Ethernet interface telecommunication circuit of no network transformer provided by the utility model, since the chip of the function containing PHY leads to
Cross signal processing module to be connected with RJ45 connectors, which does not contain network transformer, and only signal processing module is set
Discrete electronic device is equipped with, placement-and-routing is flexible, reduces cost and fabric swatch space, is conducive to product miniaturization, portable sets
Meter and user experience, can use in the application scenarios of some limited spaces or modernization intelligent construction, be easy to implement
The popularization and application of equipment.
The Ethernet interface telecommunication circuit of no network transformer provided by the utility model, without network transformer, the communication
Circuit is docked with existing ethernet device, is only had one transformer of the service of connection devices in link, can be made full use of existing resource, real
Existing distance reaches at least data communication of 80m., also can be with the equipment interconnection containing the design for back-to-back short haul connection
Communication.
The Ethernet interface telecommunication circuit of no network transformer provided by the utility model, is provided with termination power, lightning stroke is prevented
Protection circuit and common mode filtering circuit, support at least differential mode 500V, common mode 1KV lightning surges, integrated communication quality is no less than tradition
Ethernet interface application circuit containing transformer.
Brief description of the drawings
Fig. 1 is the Ethernet interface telecommunication circuit structure diagram without network transformer that the utility model embodiment provides；
Fig. 2 is the circuit diagram for the Ethernet interface telecommunication circuit without network transformer that the utility model embodiment one provides.
Embodiment
The utility model embodiment solves existing by providing a kind of Ethernet interface telecommunication circuit of no network transformer
Ethernet interface is become using technical problem of high cost caused by network transformer, occupied space is big using no network in technology
The ethernet communication circuit of depressor, reduces cost and fabric swatch space, is easy to implement the popularization and application of equipment and other extension work(
Energy.
The technical solution of the utility model embodiment is in order to solve the above technical problems, general thought is as follows：
Referring to Fig. 1, the utility model embodiment provides a kind of Ethernet interface telecommunication circuit of no network transformer, bag
Include：Chip 1, signal processing module 2 and the RJ45 connectors 3 of the function containing PHY；The chip 1 of the function containing PHY passes through signal processing
Module 2 is connected with RJ45 connectors 3.
In order to better understand the above technical scheme, in conjunction with appended figures and specific embodiments to upper
Technical solution is stated to be described in detail.
Embodiment one
A kind of Ethernet interface telecommunication circuit of no network transformer is present embodiments provided, referring to Fig. 1, this is without network transformation
The Ethernet interface telecommunication circuit of device includes：Chip 1, signal processing module 2 and the RJ45 connectors 3 of the function containing PHY.Wherein, contain
The chip 1 of PHY functions is provided with P line end mouth TRD_P and N line end mouth TRD_N, P line end mouth TRD_P and N line end mouth TRD_N structures
Into data difference separated time pair, access data difference demand pairs amount is selected according to the demand of connection speed, in the present embodiment, work(containing PHY
The chip 1 of energy is provided with four groups of differential data lines pair.Signal processing module 2 is provided with the input of the first P lines and output port SI0_
P, the input of the first N lines and output port SI0_N, the input of the 2nd P lines and output port SO0_P and the input of the 2nd N lines and output terminal
Mouth SO0_N, signal processing module 2 are provided with multipair input and output port, and access differential pair is selected according to connection speed demand
Quantity, in the present embodiment, signal processing module 2 is provided with four groups of inputs and output port；First P lines input and output port
SI0_P and the input of the first N lines form data difference separated time pair, the input of the 2nd P lines and output port SO0_ with output port SI0_N
P and the input of the 2nd N lines form data difference separated time pair with output port SO0_N.RJ45 connectors 3 are provided with four groups of network ports
LAN1~LAN8, is used only 2 pairs of data cables, i.e., for standard ethernet (10Mbit/s), Fast Ethernet (100Mbit/s)
LAN1, LAN2, LAN3 and LAN6,4 pairs of data cables are then used for gigabit Ethernet (1000Mbit/s).
In the present embodiment, one group of differential data line port corresponds to one group of input and output port and one group of network port.Under
Face is by taking one group of differential data line port, one group of input and output port and one group of network port as an example to this without network transformer
Ethernet interface telecommunication circuit illustrates：
Referring to Fig. 2, signal processing module 2 includes：Termination power, lightning Protection circuit and common mode filtering circuit.Wherein, coupling
Closing circuit includes：First capacitance C1 and the second capacitance C2, forms AC termination powers.The present embodiment is provided with two-stage lightning Protection electricity
Road, first order lightning Protection circuit include：First resistor R1, second resistance R2 and the first transient voltage suppressor diode TVS1；
Second level lightning Protection circuit includes：3rd resistor R3, the 4th resistance R4 and the second transient voltage suppressor diode TVS2.Common mode
Filter circuit includes：First inductance L1, the second inductance L2, the 5th resistance R5, the 3rd capacitance C3 and the 4th capacitance C4.P line end mouths
TRD_P is inputted with the first P lines and is connected with output port SI0_P, and one end of the first capacitance C1 is inputted with the first P lines and output terminal
Mouth SI0_P connections, the other end of the first capacitance C1 are connected by first resistor R1 with 3rd resistor R3,3rd resistor R3 and second
The input of P lines is connected with output port SO0_P, and the input of the 2nd P lines is connected with output port SO0_P with first network port LAN1.
N line end mouth TRD_N and the first N lines are inputted be connected with output port SI0_N, one end of the second capacitance C2 inputted with the first N lines and
Output port SI0_N connections, the other end of the second capacitance C2 are connected by second resistance R2 with the 4th resistance R4, the 4th resistance
R4 is inputted with the 2nd N lines and is connected with output port SO0_N, the input of the 2nd N lines and output port SO0_N and second network port
LAN2 connections.One end of first transient voltage suppressor diode TVS1 is connected between second resistance R2 and the 4th resistance R4, the
The other end that transient voltage suppresses diode TVS1 is connected between first resistor R1 and 3rd resistor R3；Second transient voltage
The one end for suppressing diode TVS2 is connected with the input of the 2nd P lines with output port SO0_P, the second transient voltage suppressor diode
The other end of TVS2 is inputted with the 2nd N lines and is connected with output port SO0_N.One end of first inductance L1 and the input of the 2nd P lines with
Output port SO0_P connections, the other end of the first inductance L1 pass through the second inductance L2 and the input of the 2nd N lines and output port
SO0_N connections.One end of 5th resistance R5 is connected to the centre of the first inductance L1 and the second inductance L2, and the 5th resistance R5's is another
End is grounded by the 3rd capacitance C3；4th capacitance C4 and the 3rd capacitance C3 is connected in parallel.
Signal processing module 2 is the circuit being made of discrete electronic device, using the one pair of which differential data in Fig. 2 as
Example, first P line input and output port SI0_P and first N line input and output port of the data from signal processing module 2
After SI0_N enters, AC couplings are carried out by the first capacitance C1 and the second capacitance C2, for optimizing output and input signal, are eliminated
Influence of the terminal device level differences to signal, filters out DM EMI, to realize that long range signals communicate, then from signal processing
The 2nd P lines input of module 2 is exported to the first of RJ45 connectors 3 with output port SO0_P and the 2nd N line output terminals SO0_N
Network port LAN1 and the second network port LAN2.In practical applications, situation is debugged according to actual, selects suitable first electricity
Hold the capacitance of C1 and the second capacitance C2, or the resistance value of first resistor R1 and second resistance R2.Data after signal processing
Directly exported by RJ45 connectors 3, docked by cable with common ethernet device, support the data communication up to 80m,
Whole communication link only has a network transformer on common ethernet device.Certainly, for back-to-back data transfer, contain
The equipment room for having the design can also dock communication.
In order to realize corresponding lightning protection grade at the same time, 3rd resistor R3, the 4th resistance R4 and the second transient voltage suppress two
Pole pipe TVS2 forms first order lightning Protection, after the big voltage that is struck by lightning is come in from RJ45 connectors 3, by the second transient state electricity
Constrain diode TVS2 processed and absorb instantaneous large-current, and both end voltage is clamped down on and is made a reservation in two transient voltage suppressor diode TVS2
Voltage on, then pass through 3rd resistor R3 and the 4th resistance R4 current limlitings, protect late-class circuit.First resistor R1, second resistance R2
Second level lightning Protection is formed with the first transient voltage suppressor diode TVS1, the residual voltage after first order lightning Protection is used
Transient voltage suppressor diode TVS1 is limited on the predetermined voltage of smaller, by first resistor R1, second resistance R2 current limlitings
Afterwards, the first capacitance C1, the second capacitance C2 isolated DC voltages that are coupled for AC, the last chip 1 to the function containing PHY are passed through.
2nd P lines input and output port SO0_P and the input of the 2nd N lines and the first inductance L1 and second that connects between output port SO0_N
Inductance L2, and in the junction of the first inductance L1 and the second inductance L2, the 5th resistance R5 of access, with the 3rd capacitance C3 of shunt capacitance
And the 4th ground connection GND of series connection after capacitance C4, for filtering common mode signal, solve RE (Radiated Emission, radiation) and CE
(Conduction Emission, conduction) problem.In the application, can additions and deletions multistage lightning Protection circuit according to the actual requirements,
Can also have some other protective device, for example, one kind in the protection device such as thermistor, varistor, gas-discharge tube or
The a variety of compositions of person, it is different according to practical application scene and equipment difference, for preventing differential mode, common mode lightning surge, avoid
Lightning stroke damages chip by PHY ports, can support at least differential mode 500V, common mode 1KV lightning surges.
Embodiment two
Embodiment two and the Ethernet interface telecommunication circuit without network transformer that embodiment one provides are essentially identical, it is different
Part is：Lightning Protection circuit is not contained, at this time, resistance R1 and resistance R2 can be still arranged as required in no network transformer
Ethernet interface telecommunication circuit in be used cooperatively.
Embodiment three
Example IV and the Ethernet interface telecommunication circuit without network transformer that embodiment one provides are essentially identical, it is different
Part is：The first capacitance C1 in termination power is replaced with the 6th resistance R6, and the second capacitance C2 is replaced with the 7th resistance R7, structure
Into DC termination powers.
One or more technical solutions that the utility model embodiment provides, at least possess following beneficial effect or advantage：
The Ethernet interface telecommunication circuit without network transformer that the utility model embodiment provides, due to the function containing PHY
Chip 1 is connected by signal processing module 2 with RJ45 connectors 3, which does not contain network transformer, only at signal
Reason module 2 be provided with discrete electronic device, placement-and-routing is flexible, reduces cost and fabric swatch space, be conducive to product miniaturization,
Portable design and user experience, can use in the application scenarios of some limited spaces or modernization intelligent construction,
It is easy to implement the popularization and application of equipment.
The Ethernet interface telecommunication circuit without network transformer that the utility model embodiment provides, without network transformer,
The telecommunication circuit is docked with existing ethernet device, is only had one transformer of the service of connection devices in link, can be made full use of existing
Resource, realizes distance up at least data communication of 80m.Application for no long range demand, can also contain communication electricity
The ethernet device docking on road.
The utility model embodiment provide the Ethernet interface telecommunication circuit without network transformer, be provided with termination power,
Lightning Protection circuit and common mode filtering circuit, support at least differential mode 500V, common mode 1KV lightning surges, integrated communication quality is insolently
In Ethernet interface application circuit of the tradition containing transformer.
It should be noted last that above embodiment is only illustrating the technical solution of the utility model rather than limit
System, although the utility model is described in detail with reference to example, it will be understood by those of ordinary skill in the art that, can be right
The technical solution of the utility model technical scheme is modified or replaced equivalently, without departing from the spirit and model of technical solutions of the utility model
Enclose, it should all cover among the right of the utility model.
Claims (8)
- A kind of 1. Ethernet interface telecommunication circuit of no network transformer, it is characterised in that including：Chip, the signal of the function containing PHY Processing module and RJ45 connectors；The chip of the function containing PHY is connected by the signal processing module with the RJ45 connectors；The signal processing module includes：Termination power；P line ends mouth and N line end mouths are set in the chip of the function containing PHY, and the P line ends mouth and the N line ends mouth form number According to differential pair；The signal processing module is provided with the input of the first P lines and output port, the input of the first N lines and output port, the 2nd P lines Input and output port and the input of the 2nd N lines and output port；The first P lines input and output port and the first N lines Input and output port form data difference separated time pair, the 2nd P lines input and output port and the 2nd N lines input with it is defeated Exit port forms data difference separated time pair；The RJ45 connectors are provided with the network port；The P line ends mouth is inputted with the first P lines and is connected with output port, the first P lines input and output port and institute State termination power connection；The termination power is inputted with the 2nd P lines and is connected with output port；2nd P lines input with Output port is connected with the network port；The N line ends mouth is inputted with the first N lines and is connected with output port, the first N lines input and output port and institute State termination power connection；The termination power is inputted with the 2nd N lines and is connected with output port；2nd N lines input with Output port is connected with another network port.
- 2. the Ethernet interface telecommunication circuit without network transformer as claimed in claim 1, it is characterised in that the signal processing Module further includes：Common mode filtering circuit；The common mode filtering circuit is connected to the 2nd P lines input and output port and the 2nd N lines input and output terminal Between mouthful.
- 3. the Ethernet interface telecommunication circuit without network transformer as claimed in claim 2, it is characterised in that the termination power For DC coupling circuit or ac-coupled circuit；If the termination power is ac-coupled circuit, the termination power includes：First capacitance and the second capacitance；Described first One end of capacitance inputs with the first P lines and is connected with output port, and the other end of first capacitance and the 2nd P lines are defeated Enter and be connected with output port；One end of second capacitance inputs with the first N lines and is connected with output port, second electricity The other end of appearance is inputted with the 2nd N lines and is connected with output port；If the termination power is DC coupling circuit, the termination power includes：6th resistance and the 7th resistance；Described 6th One end of resistance inputs with the first P lines and is connected with output port, the other end and the 2nd P lines of the 6th resistance Input is connected with output port；One end of 7th resistance inputs with the first N lines and is connected with output port, and the described 7th The other end of resistance is inputted with the 2nd N lines and is connected with output port.
- 4. the Ethernet interface telecommunication circuit without network transformer as claimed in claim 3, it is characterised in that the signal processing Module further includes：Lightning Protection circuit；The termination power is inputted by the lightning Protection circuit and the 2nd P lines input with output port and the N lines It is connected with output port.
- 5. as claimed in claim 4 without network transformer Ethernet interface telecommunication circuit, it is characterised in that the lightning Protection electricity Road is at least level-one.
- 6. as claimed in claim 5 without network transformer Ethernet interface telecommunication circuit, it is characterised in that the lightning Protection electricity Road includes：First order lightning Protection circuit and second level lightning Protection circuit；The first order lightning Protection circuit includes：First Resistance, second resistance and the first transient voltage suppressor diode；The second level lightning Protection circuit includes：3rd resistor, Four resistance and the second transient voltage suppressor diode；One end of the first resistor and first capacitance connection, the other end of the first resistor pass through the 3rd resistor Input with the 2nd P lines and be connected with output port；One end of the second resistance and second capacitance connection, the other end of the second resistance pass through the 4th resistance Input with the 2nd N lines and be connected with output port；One end of first transient voltage suppressor diode is connected between the second resistance and the 4th resistance, described The other end of first transient voltage suppressor diode is connected between the first resistor and the 3rd resistor；One end of second transient voltage suppression diode inputs with the 2nd P lines and is connected with output port, and described second The other end of transient voltage suppressor diode is inputted with the 2nd N lines and is connected with output port.
- 7. the Ethernet interface telecommunication circuit without network transformer as claimed in claim 6, it is characterised in that first electricity Resistance, second resistance, the resistance value of 3rd resistor and the 4th resistance are greater than or equal to 0.
- 8. such as Ethernet interface telecommunication circuit of the claim 3-7 any one of them without network transformer, it is characterised in that described Common mode filtering circuit includes：First inductance, the second inductance, the 5th resistance, the 3rd capacitance and the 4th capacitance；One end of first inductance inputs with the 2nd P lines and is connected with output port, and the other end of first inductance leads to Second inductance is crossed to be connected with the 2nd N lines input with output port；One end of 5th resistance is connected between first inductance and second inductance, the 5th resistance it is another End passes through the 3rd capacity earth；4th capacitance is connected in parallel with the 3rd capacitance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720945054.4U CN207283569U (en) | 2017-07-31 | 2017-07-31 | Ethernet interface telecommunication circuit without network transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720945054.4U CN207283569U (en) | 2017-07-31 | 2017-07-31 | Ethernet interface telecommunication circuit without network transformer |
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| Publication Number | Publication Date |
|---|---|
| CN207283569U true CN207283569U (en) | 2018-04-27 |
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ID=61986584
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| CN201720945054.4U Active CN207283569U (en) | 2017-07-31 | 2017-07-31 | Ethernet interface telecommunication circuit without network transformer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107579832A (en) * | 2017-07-31 | 2018-01-12 | 博为科技有限公司 | Ethernet interface telecommunication circuit without network transformer |
| CN113746643A (en) * | 2021-09-08 | 2021-12-03 | 中国航空工业集团公司西安航空计算技术研究所 | Ethernet circuit without network transformer |
-
2017
- 2017-07-31 CN CN201720945054.4U patent/CN207283569U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107579832A (en) * | 2017-07-31 | 2018-01-12 | 博为科技有限公司 | Ethernet interface telecommunication circuit without network transformer |
| CN107579832B (en) * | 2017-07-31 | 2023-11-28 | 博为科技有限公司 | Ethernet port communication circuit without network transformer |
| CN113746643A (en) * | 2021-09-08 | 2021-12-03 | 中国航空工业集团公司西安航空计算技术研究所 | Ethernet circuit without network transformer |
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Address after: 314400 Room 201, building 2, No. 306, Gushui Road, Haining Economic Development Zone, Haining City, Jiaxing City, Zhejiang Province Patentee after: BIRTRONIX TECHNOLOGY CORPORATION Address before: 307, room 2, building 522, 314006 Asia Pacific Road, Nanhu District, Zhejiang, Jiaxing Patentee before: BIRTRONIX TECHNOLOGY CORPORATION |
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