CN205430254U - Transmission rate 32Kbps~80Mbps receives and dispatches integrative SFP optical module - Google Patents
Transmission rate 32Kbps~80Mbps receives and dispatches integrative SFP optical module Download PDFInfo
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- CN205430254U CN205430254U CN201620219109.9U CN201620219109U CN205430254U CN 205430254 U CN205430254 U CN 205430254U CN 201620219109 U CN201620219109 U CN 201620219109U CN 205430254 U CN205430254 U CN 205430254U
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- control circuit
- light source
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Abstract
The utility model discloses a transmission rate 32Kbps~80Mbps receives and dispatches integrative SFP optical module constitutes by being bare emission unit and light receiving unit, and light emission unit includes power control circuit, and light receiving unit includes gain control circuit, and wherein, light emission unit's input and light receiving unit's output adopt TTL level interface to, power control circuit and gain control circuit's low frequency cutoff frequency all is less than the transmission frequency of light signal. The utility model discloses transmit the special low rate signal of IEEE C37.94 and some effectively. And improve the reliability under the low transmission rate condition simultaneously, avoid appearing signal distortion.
Description
Technical field
This utility model relates to optical module field, particularly to a kind of transfer rate 32Kbps～80Mbps transceiver SFP optical module.
Background technology
In a lot of application of optic communication, message transmission rate improves constantly, to realize the transmission of more effective data.But in some special applications, data volume only has tens Kb/s to tens Mb/s, but reliability requirement is the highest.Such as power system is for the IEEEC37.94 standard of signal transmission, and definition speed is 2.048Mb/s, minimum can arrive 64kb/s.Such speed, conventional SFP cannot be carried out transmitting, may lose some low-frequency information.
At present, having some to use the backward compatible scheme to low rate of two-forty SFP optical module, the employing differential data that is accomplished by of these schemes inputs, exports, and AC couples, and the signal type of data is usually Pecl, CML；APC circuit is used to be controlled launching power；The TIA docking collection of letters number is used to carry out converting and gain control；The parameters of module is monitored and stores by Applied Digital diagnostic function chip and EEPROM.
But, there are some defects in this backward compatible SFP optical module.1) signal type of general low-rate signal is all single-ended TTL, and transmitting terminal chip cannot be operated in fast state, in fact it could happen that output optical signal Duty Cycle Distortion；2) receiving single output signal is difference PECL signal, need to add electrical level transferring chip at host end, to realize single-ended TTL signal, add cost and circuit complexity；3) using high-speed transceiver chip, power consumption is bigger and relatively costly；4) power controls to be completed by the APC circuit of integrated chip internal, and the shortest owing to being high-speed applications APC circuit data constant, low-frequency cut-off frequency is higher, there will be distorted signals when low rate；5), in receiving end circuit, generally by realizing the integration of AC signal, there is time constant in the los of LA, if this time constant is shorter, when by transmission low-rate signal, there will be los report by mistake, if there being Jam function also can close output-stage circuit, thus causing error code.
Therefore, in the applied environment that these are special, the SFP optical module that the support single-ended TTL signal of low rate can be completed of needs.
Utility model content
The purpose of this utility model is that solving conventional SFP optical module is compatible low rate, increases circuit complexity and cost, and reliability is the highest, problem distorted signals easily occur.
In order to realize above-mentioned utility model purpose, this utility model provides a kind of transfer rate 32Kbps～80Mbps transceiver SFP optical module, it is made up of Optical Transmit Unit and light receiving unit, described Optical Transmit Unit includes power control circuit, described light receiving unit includes gain control circuit, wherein, the input of described Optical Transmit Unit and the outfan of described light receiving unit all use Transistor-Transistor Logic level interface, further, the low-frequency cut-off frequency of described power control circuit and described gain control circuit is respectively less than the transmission frequency of optical signal.
According to a kind of specific embodiment, described SFP optical module also has a preliminary data input pin and a preliminary data output pin, is respectively used to the data input of described Optical Transmit Unit and the data output of described light receiving unit.
According to a kind of specific embodiment, described Optical Transmit Unit also includes light source drive, light source and transmitting terminal luminous power detection module, and described light receiving unit includes optical receiver, limiting amplifier and receiving terminal luminous power detection module, wherein；
The Transistor-Transistor Logic level signal that described light source drive inputs according to the input of described Optical Transmit Unit, drive described light source, and the op-tical power information of described light source is fed back to described power control circuit by described transmitting terminal luminous power detection module, described power control circuit is made to regulate the light source drive current of described light source drive；
Described optical receiver receives the optical signal of the input input of described light receiving unit, and described receiving terminal luminous power detection module, for detecting the op-tical power information of described optical signal；The optical signal that described optical receiver receives is converted to voltage signal by described trans-impedance amplifier, and by the gain of trans-impedance amplifier described in described gain control circuit controls, making it export stable voltage signal, last described voltage signal is by, after described limiting amplifier, being output as Transistor-Transistor Logic level signal.
According to a kind of specific embodiment, the described Transistor-Transistor Logic level signal inputting described Optical Transmit Unit coupled to described light source drive through DC.
According to a kind of specific embodiment, also include micro-control unit, for gathering the temperature of described SFP optical module, supply voltage, light source drive current, transmitting terminal luminous power and the information of receiving terminal luminous power, and described micro-control unit is by IC bus and external device communication.
Compared with prior art, the beneficial effects of the utility model:
Transceiver SFP optical module of the present utility model is by using Transistor-Transistor Logic level interface, effectively to transmit IEEEC37.94 and some special low-rate signals in the input of Optical Transmit Unit and the output of light receiving unit respectively.Further, simultaneously because the low-frequency cut-off frequency of power control circuit and gain control circuit is respectively less than the transmission frequency of optical signal, it is possible to increase reliability at low transmission rates, it is to avoid distorted signals occurs.And the low frequency of this utility model support is to the range intervals width of high frequency, the high frequency of support is Frequency high more than 2000 times.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model transceiver SFP optical module；
Fig. 2 is the pin schematic diagram of this utility model transceiver SFP optical module；
Fig. 3 is that a kind of of this utility model transceiver SFP optical module implements structural representation.
Detailed description of the invention
Below in conjunction with detailed description of the invention, this utility model is described in further detail.But this should not being interpreted as, the scope of the above-mentioned theme of this utility model is only limitted to below example, and all technology realized based on this utility model content belong to scope of the present utility model.
The structural representation of this utility model transceiver SFP optical module as shown in Figure 1；Wherein, this utility model transfer rate 32Kbps～80Mbps transceiver SFP optical module, it is made up of Optical Transmit Unit and light receiving unit, Optical Transmit Unit includes power control circuit, light receiving unit includes gain control circuit, it is characterised in that the input of Optical Transmit Unit and the outfan of light receiving unit all use Transistor-Transistor Logic level interface, further, the low-frequency cut-off frequency of power control circuit and gain control circuit is respectively less than the transmission frequency of optical signal.
Concrete, Optical Transmit Unit also includes light source drive, light source and transmitting terminal luminous power detection module, and light receiving unit includes optical receiver, limiting amplifier and receiving terminal luminous power detection module.
Wherein, the Transistor-Transistor Logic level signal that light source drive inputs according to the input of Optical Transmit Unit, drive light source, and the op-tical power information of light source is fed back to power control circuit by transmitting terminal luminous power detection module, make the light source drive current of power control circuit regulation light source drive.
When implementing, the TTL signal of input Optical Transmit Unit is coupled to light source drive through DC, and light source drive drives light source according to 0, and 1 signal goes out light, and this utility model is applicable to the light sources such as VCSEL, FP, DFB and LED.The light power of light source is monitored by transmitting terminal luminous power detection module, and the op-tical power information of light source feeds back to power control circuit, and then makes power control circuit control the light source drive current of light source drive.
Optical receiver receives the optical signal of the input input of light receiving unit, and receiving terminal luminous power detection module, for detecting the op-tical power information of optical signal；The optical signal that optical receiver receives is converted to voltage signal by trans-impedance amplifier, and by the gain of gain control circuit controls trans-impedance amplifier so that it is exporting stable voltage signal, last voltage signal is by, after limiting amplifier, being output as Transistor-Transistor Logic level signal.
The pin schematic diagram of this utility model transceiver SFP optical module as shown in Figure 2；Wherein, this utility model transceiver SFP optical module cancels the Tx_fault pin in original SFP optical module, it is defined as available transmitting terminal data in pin, the most also cancel the Rate_select pin in original SFP optical module, be defined as available receiving terminal data out pin.Therefore, this utility model transceiver SFP optical module also has a preliminary data input pin and a preliminary data output pin, is respectively used to the data input of Optical Transmit Unit and the data output of light receiving unit.
When implementing, especially in special applications, this utility model transceiver SFP optical module can cancel Pin2Tx_fault pin and the function of Pin7Rate_select pin, and be available transmitting terminal data in pin by Pin2Tx_fault pin definitions, it is available receiving terminal data out pin by Pin7Rate_select pin definitions.Table one is this utility model transceiver SFP optical module pin definitions table.
Table 1
| 1 | VeeT | Transmitting terminal ground |
| 2 | TD (optional) | Originating data input (optional) |
| 3 | Tx-disable | Transmitting terminal enables |
| 4 | MOD-DEF(2) | I2C bus data interface |
| 5 | MOD-DEF(1) | I2C bus clock interface |
| 6 | MOD-DEF(0) | Module indicates interface online |
| 7 | RD (optional) | Receiving end data output (optional) |
| 8 | LOS/SD | Reception data indicate, LOS or SD |
| 9 | VeeR | Receiving terminal ground |
| 10 | VeeR | Receiving terminal ground |
| 11 | VeeR | Receiving terminal ground |
| 12 | NC | |
| 13 | RD (optional) | Receiving end data input (optional) |
| 14 | VeeR | Receiving terminal ground |
| 15 | VccR | Receiving terminal power supply |
| 16 | VccT | Transmitting terminal power supply |
| 17 | VeeT | Transmitting terminal ground |
| 18 | TD (optional) | Originating data input (optional) |
| 19 | NC | |
| 20 | VeeT | Transmitting terminal ground |
A kind of in conjunction with this utility model transceiver SFP optical module shown in Fig. 3 implements structural representation；Wherein, also including micro-control unit, for gathering the temperature of SFP optical module, supply voltage, light source drive current, transmitting terminal luminous power and the information of receiving terminal luminous power, and micro-control unit is by IC bus and external device communication.
Concrete, micro-control unit is connected with light source drive, to gather light source drive current information, and micro-control unit is connected with transmitting terminal luminous power detection module and receiving terminal luminous power detection module respectively, to gather transmitting terminal luminous power and receiving terminal op-tical power information.Meanwhile, the voltage of module for power supply power supply is detected by micro-control unit.Further, this utility model transceiver SFP optical module is provided with temperature sensor, and micro-control unit is by the signal sampling to temperature sensor, to gather the temperature of SFP optical module.
Micro-control unit in this utility model transceiver SFP optical module is integrated microcontroller, and it passes through IC bus, and the information gathered output is to connected external equipment.
Above in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in detail, but this utility model is not restricted to above-mentioned embodiment, in the case of without departing from the spirit and scope of claims hereof, those skilled in the art may be made that various amendment or remodeling.
Claims (5)
1. transfer rate 32Kbps～80Mbps transceiver SFP optical module, it is made up of Optical Transmit Unit and light receiving unit, described Optical Transmit Unit includes power control circuit, described light receiving unit includes gain control circuit, it is characterized in that, the input of described Optical Transmit Unit and the outfan of described light receiving unit all use Transistor-Transistor Logic level interface, and, the low-frequency cut-off frequency of described power control circuit and described gain control circuit is respectively less than the transmission frequency of optical signal.
2. transfer rate 32Kbps as claimed in claim 1～80Mbps transceiver SFP optical module, it is characterized in that, described SFP optical module also has a preliminary data input pin and a preliminary data output pin, is respectively used to the data input of described Optical Transmit Unit and the data output of described light receiving unit.
3. transfer rate 32Kbps as claimed in claim 1～80Mbps transceiver SFP optical module, it is characterized in that, described Optical Transmit Unit also includes light source drive, light source and transmitting terminal luminous power detection module, described light receiving unit includes optical receiver, trans-impedance amplifier, limiting amplifier and receiving terminal luminous power detection module, wherein；
The Transistor-Transistor Logic level signal that described light source drive inputs according to the input of described Optical Transmit Unit, drive described light source, and the op-tical power information of described light source is fed back to described power control circuit by described transmitting terminal luminous power detection module, described power control circuit is made to regulate the light source drive current of described light source drive；
Described optical receiver receives the optical signal of the input input of described light receiving unit, and described receiving terminal luminous power detection module, for detecting the op-tical power information of described optical signal；The optical signal that described optical receiver receives is converted to voltage signal by described trans-impedance amplifier, and by the gain of trans-impedance amplifier described in described gain control circuit controls, making it export stable voltage signal, last described voltage signal is by, after described limiting amplifier, being output as Transistor-Transistor Logic level signal.
4. transfer rate 32Kbps as claimed in claim 3～80Mbps transceiver SFP optical module, it is characterised in that the described Transistor-Transistor Logic level signal inputting described Optical Transmit Unit coupled to described light source drive through DC.
5. transfer rate 32Kbps as claimed in claim 3～80Mbps transceiver SFP optical module, it is characterized in that, also include micro-control unit, for gathering the temperature of described SFP optical module, supply voltage, light source drive current, transmitting terminal luminous power and the information of receiving terminal luminous power, and described micro-control unit is by IC bus and external device communication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620219109.9U CN205430254U (en) | 2016-03-21 | 2016-03-21 | Transmission rate 32Kbps~80Mbps receives and dispatches integrative SFP optical module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620219109.9U CN205430254U (en) | 2016-03-21 | 2016-03-21 | Transmission rate 32Kbps~80Mbps receives and dispatches integrative SFP optical module |
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| CN205430254U true CN205430254U (en) | 2016-08-03 |
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| CN201620219109.9U Withdrawn - After Issue CN205430254U (en) | 2016-03-21 | 2016-03-21 | Transmission rate 32Kbps~80Mbps receives and dispatches integrative SFP optical module |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105610511A (en) * | 2016-03-21 | 2016-05-25 | 成都新易盛通信技术股份有限公司 | Transmitting-receiving SFP optical module with transmission rate between 32Kbps-80Mbps |
| CN107846253A (en) * | 2017-11-27 | 2018-03-27 | 国网浙江省电力有限公司 | A kind of data acquisition and Transmission system based on FPGA and OTN |
| CN108847897A (en) * | 2018-08-03 | 2018-11-20 | 青岛海信宽带多媒体技术有限公司 | A kind of optical module |
| CN109067471A (en) * | 2018-08-31 | 2018-12-21 | 湖南率为控制科技有限公司 | Light-receiving integrating device |
-
2016
- 2016-03-21 CN CN201620219109.9U patent/CN205430254U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105610511A (en) * | 2016-03-21 | 2016-05-25 | 成都新易盛通信技术股份有限公司 | Transmitting-receiving SFP optical module with transmission rate between 32Kbps-80Mbps |
| CN105610511B (en) * | 2016-03-21 | 2019-02-19 | 成都新易盛通信技术股份有限公司 | A kind of transmission rate 32Kbps~80Mbps transceiver SFP optical module |
| CN107846253A (en) * | 2017-11-27 | 2018-03-27 | 国网浙江省电力有限公司 | A kind of data acquisition and Transmission system based on FPGA and OTN |
| CN108847897A (en) * | 2018-08-03 | 2018-11-20 | 青岛海信宽带多媒体技术有限公司 | A kind of optical module |
| CN108847897B (en) * | 2018-08-03 | 2021-05-28 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| CN109067471A (en) * | 2018-08-31 | 2018-12-21 | 湖南率为控制科技有限公司 | Light-receiving integrating device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160803 Effective date of abandoning: 20190219 |
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| AV01 | Patent right actively abandoned |