CN2847703Y

CN2847703Y - Light receiving and transmitting integrated module

Info

Publication number: CN2847703Y
Application number: CNU2005201263848U
Authority: CN
Inventors: 赵其圣; 任春年; 刘晓
Original assignee: HAISENSE PHOTOELECTRIC SCIENCE AND TECHNOLOGY Co Ltd QINGDAO; Hisense Group Co Ltd
Current assignee: HAISENSE PHOTOELECTRIC SCIENCE AND TECHNOLOGY Co Ltd QINGDAO; Hisense Group Co Ltd
Priority date: 2005-12-22
Filing date: 2005-12-22
Publication date: 2006-12-13
Anticipated expiration: 2015-12-22

Abstract

The utility model discloses a light receiving and transmitting integrated module which comprises a standard light module interface. In the light module interface, input ends of differential signals are correspondingly connected with a signal output end in the light module interface respectively through a resistor and a capacitor connected in series. An impedance matching resistor is connected between two input ends of differential signals. When a system communication apparatus carries out self-check, the light receiving and transmitting integrated module is inserted on a light opening which needs the self-check; then, an electric signal of the light opening is inputted into the light receiving and transmitting integrated module according to a conventional system self-check program; the electric signal returns to the system communication apparatus through loopback for completing the self-check of a system. The light receiving and transmitting integrated module of the utility model has advantages of simple structure and low cost. When the system apparatus carries out the self-check, auxiliary apparatuses such as fiber, attenuators, etc., do not need additionally installing for realization. The light receiving and transmitting integrated module which reduces operating difficulty effectively enhances product reliability, and is convenient for technical personnel to develop and use.

Description

The integrated module of optical transceiver

Technical field

The utility model belongs to the optical communication technique field, specifically, relates to a kind of loopback circuit of the integrated module of optical transceiver of the MSA-SFP of meeting standard.

Background technology

At present, the system communication equipment that occurs on the market is when carrying out the self check of light mouth, general all is to need to plug conventional optical module on the light mouth of self check in system, the transmitting-receiving port that connects optical module with optical patchcord, and need set up the self check that attenuator attenuation realizes communication equipment light mouth on optical patchcord, its concrete line connecting relation is referring to shown in Figure 1.Conventional optical transceiver module internal circuit configuration complexity, the cost height; And need to use optical patchcord and attenuator to assist the self check that realizes system equipment, so complicated operation, be not easy to promote the use of.

Summary of the invention

The utility model is in order to solve conventional optical transceiver module complex structure, cost height in the prior art, and in the process that communicates the self check of equipment light mouth, need to set up optical fiber and attenuator and assist realization, thereby cause complicated operation, awkward problem, a kind of novel integrated module of optical transceiver is provided, by adopting simple circuit configuration to realize the loopback of the signal of telecommunication, avoided the use of optical fiber and attenuator, not only reduced cost, reduced operation easier, and improved reliability of products, made things convenient for technical staff's use.

For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:

A kind of integrated module of optical transceiver, the optical module interface that comprises standard, in described optical module interface, its differential signal input is corresponding connection of signal output part in resistance and the electric capacity of series connection and described optical module interface respectively, is connected with an impedance matching resistance between described two differential signal inputs.

As the further qualification to technique scheme, in described optical module interface, its iic bus end is corresponding continuous with the bus end of a memory respectively.It is the eeprom chip realization of 24LC018 that described memory adopts a model, and its power end connects the power end of described optical module interface on the other hand on the one hand through capacity earth through inductance.

As to further the limiting again of technique scheme, between the connected node of the resistance of described two-way series connection and electric capacity, be connected with a resistance, described two electric capacity connect signal output part in the described optical module interface through an inductance respectively.

As further limiting again to technique scheme, in the described integrated module of optical transceiver, include a relay indicating light circuit, described indicator light circuit is formed by the series connection of resistance and light-emitting diode, and described series arm is connected between the power end and earth terminal in the optical module interface.

Compared with prior art, advantage of the present utility model and good effect are: the utility model is finished the loopback of the signal of telecommunication by adopting pure capacitance resistance ware, adopts eeprom chip to come the relevant information of memory module.During the system communication equipment self-inspection, needing to insert the described integrated module of optical transceiver on the light mouth of self check, be input in the integrated module of optical transceiver according to the System self-test program of routine the signal of telecommunication then, behind loopback, turn back in the system communication equipment, finish the self check of system the light mouth.Optical module structure integrated with sending and receiving of the present utility model is simple, and is with low cost, when carrying out the system equipment self check, not needing to set up auxiliary equipment such as optical fiber and attenuator can realize, greatly reduce operation easier, effectively improved reliability of products, be convenient to the technical staff and develop use.

Description of drawings

Fig. 1 is the circuit catenation principle figure when adopting the existing conventional optical module to carry out the system equipment self check;

Fig. 2 is the internal circuit theory diagram of the integrated module of optical transceiver in the utility model;

Fig. 3 is the circuit catenation principle figure between the integrated module of optical transceiver of the present utility model and the system equipment;

Fig. 4 is the concrete circuit connection diagram of the integrated module of optical transceiver of the present utility model inside.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is done explanation in further detail.

The integrated module of optical transceiver of the present utility model adopts pure capacitance resistance ware to finish the loopback of the signal of telecommunication, and eeprom chip is used for the relevant information of memory module.During the system communication equipment self-inspection, the described integrated module of optical transceiver is received the signal of telecommunication that system equipment sends from its TX+/TX-termination, through behind the loopback, returns the signal of telecommunication from its RX+/RX-end to system equipment, and figure is referring to shown in Figure 3 for its signal of telecommunication flow process.

Among Fig. 2, differential signal from system equipment is imported from the TX+/TX-end, after process resistance R 2 is carried out impedance matching, connects capacitance C2, C3 by damping resistance R6, R5 respectively, and then the end of the RX+/RX-by the integrated module of optical transceiver returns to system equipment, realizes the self check of system equipment.Regulate the resistance of resistance R 2, R5, R6, just can obtain different signal attenuation amplitudes.The concrete circuit connection diagram in the inside of the described integrated module of optical transceiver is referring to shown in Figure 4.

Among Fig. 4, P1 is the communication interface of the integrated module of optical transceiver, and is identical with existing conventional optical module interface, for 20 pin general-purpose interfaces of standard, corresponding with communication interface set on the external system devices.When system equipment needs self check, only on need the corresponding interface, can realize the loopback of the signal of telecommunication with the communication interface P1 insertion system equipment of the described integrated module of optical transceiver.System equipment provides DC power supply VCCT by 16 pin of interface P1 to the described integrated module of optical transceiver, and exports differential signal by its 18 pin and 19 pin to the integrated module of optical transceiver.Interconnect through impedance matching resistance R 2 between 18 pin of described interface P1 and 19 pin, and be connected with 12 pin are corresponding with electrical signal 13 pin of the integrated module of optical transceiver by damping resistance R6, capacitance C3 or damping resistance R5, the capacitance C2 that connects respectively, and then the signal of telecommunication turned back to the receiving terminal of system equipment, finish the self check of system equipment.Certainly, in described loopback circuit, also can between resistance R 5, R6, connect resistance R 3 according to the needs of system, between 13 pin of capacitor C 3 and interface P1, be connected inductance L 1, between 12 pin of capacitor C 2 and interface P1, be connected inductance L 2, to satisfy the processing requirements of loopback circuit to differential signal.

It is the storage chip realization of 24LC018 that eeprom memory U1 adopts a model, and its iic bus end SCL, SDA through 5 pin and 4 pin of resistance R 11, R12 connecting interface P1, will be stored in message transmission relevant with module among the memory U1 in system equipment respectively.The read-write control end WP of memory U1 can be set to high level or low level according to user's needs, when requiring memory U1 to be in read states, the WP end is connected DC power supply VCCT through resistance R CC; When requiring memory U1 to be in can to write state, with the WP end through resistance R EE ground connection.The filter network that DC power supply VCCT forms through inductance L 3 and capacitor C 1 is connected the power end VCC of described memory U1, for memory U1 provides stable working power.

The equal ground connection VEET of 1,6,9,10,11,14,17,20 pin of interface P1,2 pin are through resistance R 4 ground connection VEET, and 3 pin, 8 pin are through resistance R 1 ground connection VEET.In the described integrated module of optical transceiver, also include an indicator light control circuit, realize by resistance R 8 and light-emitting diode D1 series connection, described series arm is connected between the power end VCCT and earth terminal VEET among the interface P1, and the operating state of module is indicated.

The utility model has been realized the loopback control of the integrated module of optical transceiver to the signal of telecommunication by adopting above-mentioned simple circuit configuration, when the system equipment self check, plugs the loopback optical module at the light mouth that needs self check, and the System self-test program according to routine gets final product then.After System self-test is finished,, can be used as light mouth plug to the loopback optical module and be inserted on the light mouth if corresponding light mouth does not temporarily need work.Adopt the integrated module of optical transceiver described in the utility model not need to set up auxiliary equipment such as optical fiber and attenuator and can realize the self check of system equipment, thereby effectively reduce operation easier, improved reliability of products.

Certainly; above-mentioned explanation is not to be to restriction of the present utility model; the utility model also is not limited in above-mentioned giving an example, and variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present utility model also should belong to protection range of the present utility model.

Claims

1. integrated module of optical transceiver, the optical module interface (P1) that comprises standard, it is characterized in that: in described optical module interface (P1), its differential signal input (18 pin, 19 pin) is signal output part (13 pin, 12 pin) the corresponding connection in resistance (R6, R5) and the electric capacity (C3, C2) of series connection and described optical module interface (P1) respectively, is connected with an impedance matching resistance (R2) between described two differential signal inputs (18 pin, 19 pin).

2. the integrated module of optical transceiver according to claim 1 is characterized in that: in described optical module interface (P1), its iic bus end (4 pin, 5 pin) is corresponding continuous with the bus end (SCL, SDA) of a memory (U1) respectively.

3. the integrated module of optical transceiver according to claim 2, it is characterized in that: described memory (U1) adopts an eeprom chip to realize, its power end (VCC) connects the power end (16 pin) of described optical module interface (P1) on the other hand on the one hand through electric capacity (C1) ground connection through inductance (L3).

4. according to the claim 1 or the 3 described integrated modules of optical transceiver, it is characterized in that: be connected with a resistance (R3) between the connected node of the resistance (R6, R5) of described two-way series connection and electric capacity (C3, C2), described two electric capacity (C3, C2) are the signal output part (13 pin, 12 pin) in an inductance (L1, L2) the described optical module interface of connection (P1) respectively.

5. according to the claim 1 or the 3 described integrated modules of optical transceiver, it is characterized in that: in the described integrated module of optical transceiver, include a relay indicating light circuit, described indicator light circuit is in series by resistance (R8) and light-emitting diode (D1), and described series arm is connected between the power end (16 pin) and earth terminal (1 pin) in the optical module interface (P1).

6. the integrated module of optical transceiver according to claim 5 is characterized in that: the model of described eeprom chip is 24LC018.