CN109361467A - A kind of optical module - Google Patents
A kind of optical module Download PDFInfo
- Publication number
- CN109361467A CN109361467A CN201811474977.1A CN201811474977A CN109361467A CN 109361467 A CN109361467 A CN 109361467A CN 201811474977 A CN201811474977 A CN 201811474977A CN 109361467 A CN109361467 A CN 109361467A
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- CN
- China
- Prior art keywords
- optical module
- field
- wire pin
- effect tube
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/40—Transceivers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
- H04B10/806—Arrangements for feeding power
Abstract
This application discloses a kind of optical module and optical network systems, belong to technical field of optical fiber communication.The embodiment of the present application discloses a kind of optical module, including microprocessor, the first field-effect tube, the second field-effect tube, capacitor and golden finger, wherein, it is provided with the first communications pins and the second communications pins on the microprocessor, is provided with data wire pin and clock wire pin on the golden finger；The capacitor, the data wire pin and the clock wire pin are connect with the power supply of the optical module respectively；One end of first field-effect tube connects first communications pins, and the other end connects the data wire pin, grid and the capacitance connection；One end of second field-effect tube connects second communications pins, and the other end connects the clock wire pin, grid and the capacitance connection.
Description
Technical field
This application involves technical field of photo communication more particularly to a kind of optical modules.
Background technique
Fiber optic communication mode is a kind of communication mode using light wave as information carrier, using optical fiber as transmission medium, and
Optical module is very important optical signal interface device in fiber optic communication, and one end of optical module is connected as optical interface with optical fiber,
The other end is connected as electrical interface with external communication device, and optical module can convert optical signal and electric signal.
As the requirement to bandwidth is higher and higher, optical-fiber network is increasing to the demand of optical module, passes through on a host computer
Often occur ten, 20 optical modules, these optical module overwhelming majority are hot-pluggable optical module.In the prior art, upper
Machine is all with A2 to optical module, and the address A0 communicates, for having the case where multiple optical modules, host computer and multiple light on host computer
Module is connected by iic bus, for realizing the communications between host computer and multiple optical modules.Such as Fig. 1, hot-swappable light
One end of module is provided with golden finger, and optical module is inserted into host computer, the energization pins that host computer passes through golden finger by golden finger
It powers for the MCU of optical module, soft-start circuit is provided on the circuit board between MCU and golden finger, for slowly supplying MCU
Electricity guarantees the normal work of insertion optical module.
But host computer by energization pins be optical module power when, since iic bus is directly accessed the MCU of optical module
In, soft-start circuit power supply is slow, therefore energization pins directly pass through the MCU that iic bus is optical module and power, without by slow
Start-up circuit, and MCU-IIC line can regard RC circuit as, when energization pins are powered by iic bus for MCU, RC circuit can be filled
Electricity, the level that so will lead on iic bus reduce, and influence to communicate in the optical module of work on iic bus and host computer,
The case where be easy to causeing communication failure.
Summary of the invention
This application provides a kind of optical modules, to influence the level of iic bus when solving current optical module insertion host computer,
The technical issues of easily causing communication failure.
In order to solve the above-mentioned technical problem, the embodiment of the present application discloses following technical solution:
The embodiment of the present application discloses a kind of optical module, including microprocessor, the first field-effect tube, the second field-effect tube, capacitor
And golden finger, wherein be provided with the first communications pins and the second communications pins on the microprocessor, be arranged on the golden finger
There are data wire pin and clock wire pin；The capacitor, the data wire pin and the clock wire pin respectively with the light
The power supply of module connects；One end of first field-effect tube connects first communications pins, and the other end connects the data
Wire pin, grid and the capacitance connection；One end of second field-effect tube connects second communications pins, and the other end connects
Connect the clock wire pin, grid and the capacitance connection.
Compared with prior art, the application has the beneficial effect that
When optical module hot plug moment modular power source VCC is 0V, power supply drags down data wire pin and clock line pin voltage, this
When the first field-effect tube, the second field-effect tube voltage be 0V, at this time VGS be less than metal-oxide-semiconductor conducting voltage, at this time at metal-oxide-semiconductor
In off state, i.e. the data wire pin with clock wire pin of inside modules are isolated with exterior I IC bus, although mould at this time
Iic bus inside block is dragged down by VCC, but not influences the iic bus of external equipment, to play the purpose for eliminating interference；
As inside modules VCC is stepped up, VCC gradually rises to capacitor charging, the voltage (i.e. field-effect tube G pole tension) of capacitor,
Metal-oxide-semiconductor is connected when greater than metal-oxide-semiconductor conducting voltage；Since metal-oxide-semiconductor G pole tension is charged by VCC, G is extremely electric
Pressure can always be later than VCC, by capacitance, realize that metal-oxide-semiconductor is connected again after VCC stablizes, to evade in module swapping process
The unstable influence to iic bus of VCC.It should be understood that above general description and following detailed description is only example
Property and explanatory, can not limit the application.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without creative efforts, also
Other drawings may be obtained according to these drawings without any creative labor.
Fig. 1 is the structural schematic diagram of general optical module；
Fig. 2 is the schematic diagram of upper electrical equivalent circuit (IIC is equivalent to RC circuit inside MCU) in general optical module；
Fig. 3 is the schematic diagram of general optical module powered on moment host computer iic bus timing；
Fig. 4 is a kind of structural representation of optical module provided by the embodiments of the present application；
Fig. 5 be optical module provided by the embodiments of the present application in optical module powered on moment host computer iic bus timing schematic diagram.
Specific embodiment
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality
The attached drawing in example is applied, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described implementation
Example is only some embodiments of the present application, rather than whole embodiments.Based on the embodiment in the application, the common skill in this field
The application protection all should belong in art personnel every other embodiment obtained without making creative work
Range.
Modern optical-fiber network, it is increasing to the demand of optical module as the requirement to bandwidth is higher and higher, on one piece
It marches into the arena on the machine of position and occurs ten, 20 optical modules, these module overwhelming majority are hot-pluggable optical module.According to optical module
Design requirement, host computer are with A2 to each optical module, and the address A0 communicates, therefore can be connected by common iic bus
Connect host computer and each optical module.As shown in Figure 1, for there is the case where multiple optical modules on host computer, optical module passes through golden hand
Refer to that insertion host computer, host computer are connect with multiple optical modules by iic bus, iic bus is by a serial data line SDA and one
Serial time clock line SCL composition, host computer make data also transmit clock by SCL while transmitting on SDA, realize host computer
Data transmission between optical module.Multiple optical modules are connected on iic bus, for realizing between host computer and multiple optical modules
Communication.
When hot-pluggable optical module is plugged on host computer by golden finger, the energization pins of golden finger are optical module
MCU power supply is provided with soft-start circuit to prevent MCU voltage to be mutated in powered on moment between MCU and energization pins, powers
Pin is that MCU slowly powers by soft-start circuit.But as shown in Fig. 2, since iic bus (data line and clock line) is straight
It accesses in the MCU of optical module, slowly, for energization pins when for MCU power supply, supply current selects resistance for soft-start circuit power supply
Lesser iic bus is MCU power supply, and the IIC circuit in MCU can be equivalent to RC circuit, and energization pins are by iic bus
When MCU powers, RC circuit can be electrically charged, and the level that will lead on iic bus reduces.As shown in figure 3, by a new optical module
When being inserted into host computer, new optical module causes host computer bus timing bust in powered on moment, influences on iic bus and host computer
The case where the optical module of work communicates, causes communication failure.
To solve the above-mentioned problems, the embodiment of the present application provides a kind of optical module, including microprocessor, the first field-effect
Pipe, the second field-effect tube, capacitor and golden finger, wherein the first communications pins and the second communication are provided on the microprocessor
Pin is provided with data wire pin and clock wire pin on the golden finger；The capacitor, the data wire pin and it is described when
Clock wire pin is connect with the power supply of the optical module respectively；One end connection of first field-effect tube first communication is drawn
Foot, the other end connect the data wire pin, grid and the capacitance connection；Described in one end connection of second field-effect tube
Second communications pins, the other end connect the clock wire pin, grid and the capacitance connection.
When optical module hot plug moment modular power source VCC is 0V, power supply draws data wire pin and clock line pin voltage
It is low, at this time the first field-effect tube, the second field-effect tube voltage be 0V, VGS is less than the conducting voltage of metal-oxide-semiconductor, at this time MOS at this time
Pipe is in off state, i.e. the data wire pin with clock wire pin of inside modules are isolated with exterior I IC bus, although this
When inside modules iic bus dragged down by VCC, but not influence external equipment iic bus, thus play eliminate interference mesh
's；As inside modules VCC is stepped up, VCC gradually rises to capacitor charging, the voltage (i.e. field-effect tube G pole tension) of capacitor
Height, metal-oxide-semiconductor is connected when being greater than metal-oxide-semiconductor conducting voltage；Since metal-oxide-semiconductor G pole tension is charged by VCC, the pole G
Voltage can always be later than VCC, by capacitance, realize that metal-oxide-semiconductor is connected again after VCC stablizes, to evade module swapping process
The unstable influence to iic bus of middle VCC.
It referring to fig. 4, is a kind of structural schematic diagram of optical module provided by the embodiments of the present application, the MCU in optical module has
Data wire pin SDA and clock wire pin SCL.This is common I2C communications pins, according to I2C communication protocol, passes through data line
Pin and clock wire pin can carry out information transmission between two equipment.Optical module and optical module are realized in the embodiment of the present application
Communication between external host computer.
In general, the timely clock wire pin of the data wire pin of MCU is directly connected with pin corresponding on optical module golden finger, lead to
Cross the communication of golden finger insertion host computer realization and host computer.In this application, the first communications pins on light evil spirit karat gold finger
And second communications pins be pin corresponding with MCU pin.Data wire pin is finally connect with the first communications pins, clock line
Pin is finally connect with the second communications pins.In this application, it in order to realize goal of the invention, is communicated in data wire pin with first
The first field-effect tube Q6 is concatenated between pin, and the second field-effect tube Q7 is concatenated between clock wire pin and the second communications pins.
Field-effect tube has source electrode, grid and drain electrode, realizes conducting by the voltage relationship between source electrode and grid and closes
Close control.It specifically, is the metal-oxide-semiconductor conducting, when VGS is led less than it when VGS voltage is greater than its conducting voltage the characteristics of NMOS tube
When the pressure that is powered, metal-oxide-semiconductor cut-off is equivalent to inside modules iic bus and is isolated with the iic bus of equipment.
Specifically, the power supply of optical module can be the energization pins on optical module golden finger, and host computer is drawn by the power supply
Foot is all devices power supply in optical module.The power supply of optical module also can have power management chip, and energization pins draw electricity
Enter in power management chip, by power management chip to optical module in-line power.
Power supply vcc is connect by first resistor R32 with the first communications pins, is communicated and is drawn with second by second resistance R33
Foot connection, is connect by 3rd resistor R34 with capacitor C2, capacitor C2 is started to charge after powering on, and the voltage of capacitor gradually increases.
When optical module insertion host computer powers on, since VCC is 0, the voltage of two metal-oxide-semiconductors of Q6, Q7 is 0V at this time, at this time
VGS is less than the conducting voltage of metal-oxide-semiconductor, and metal-oxide-semiconductor is in off state, i.e. two electricity of the SDA and SCL(IIC of inside modules at this time
Road) it is isolated with exterior I IC bus, although the iic bus of inside modules is dragged down by VCC at this time, but not influence external set
Standby iic bus, to play the purpose for eliminating interference；As inside modules VCC is stepped up, VCC gives C2 capacitor by R34
Charging, the voltage (i.e. metal-oxide-semiconductor G pole tension) of C2 capacitor gradually rise, and metal-oxide-semiconductor is connected when being greater than metal-oxide-semiconductor conducting voltage；By
It is to be charged by VCC, therefore G pole tension can always be later than VCC in metal-oxide-semiconductor G pole tension, by the resistance value for adjusting R34, C2
And capacitance, it realizes after VCC stablizes, metal-oxide-semiconductor is connected again, so that it is unstable to iic bus to have evaded VCC in module swapping process
Influence.
As shown in figure 5, adding field-effect on the data line and clock line (iic bus) of connection MCU11 and golden finger 12
After pipe 14, MCU11 ensure that stabilization of level in iic bus in powered on moment host computer iic bus timing variations very little, protect
The normal communication between each optical module and host computer is hindered.
In the embodiment of the present application, the pin of field-effect tube is inserted on the circuit board of optical module 1, the component part packet of optical module
Optical device, shell and circuit board are included, the optical device of optical module is inserted on circuit board and is fixed, therefore by the pipe of field-effect tube 14
Foot is inserted on circuit boards, guarantees the stable connection of field-effect tube 14.
Field-effect tube can be electronics field-effect tube or mechanical field-effect tube, and electronics field-effect tube is to pass through electricity with electronic technology
Stream or voltage drive the unit of some element realization connecting and disconnecting of the circuit, i.e., after the high voltage signal of electronics field-effect tube reception MCU11,
Field-effect tube closure；After electronics field-effect tube receives the low voltage signal of MCU11, field-effect tube is disconnected.Mechanical field-effect tube
It is the element for making contact disconnecting circuit by mechanically actuated, connecting circuit, conversion circuit, i.e., mechanical field-effect tube receives
After the control signal of MCU11, field-effect tube is controlled by certain mechanically actuated (such as pull ring, button) and is opened or closed.Due to machine
Tool field-effect tube occupied space is larger, therefore electronics field-effect tube is generally used in optical module.
The optical module course of work provided by the embodiments of the present application are as follows: by new optical module (using the optical mode of application scheme
Block) insertion host computer on when, the first field-effect tube and the second field-effect tube are in an off state, and the energization pins of optical module pass through
Soft-start circuit is MCU power supply；When the detection voltage of MCU reaches preset threshold, the first field-effect tube and the second field-effect tube
It is in the conductive state；It is connected to MCU and golden finger, the IIC communicating requirement of normal response host computer.
The optical module provided based on the above embodiment, the embodiment of the present application also provides a kind of optical network system, the light nets
Network system includes optical module provided by the above embodiment, by connect optical module in MCU and golden finger data line and when
Field-effect tube is set on clock line (iic bus), so that the optical module being newly inserted into will not influence the level of iic bus, therefore is guaranteed
Iic bus and in the communication of the optical module of work, the case where avoiding communication failure generation.
Through the above description of the embodiments, person of ordinary skill in the field can be understood that the present invention
The mode of required common hardware can be added to realize by software, naturally it is also possible to which the former is by hardware, but in many cases
More preferably embodiment.
It should be noted that in the present specification, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the circuit structure, article or the equipment that include a series of elements not only include those elements,
It but also including other elements that are not explicitly listed, or further include solid by this circuit structure, article or equipment
Some elements.In the absence of more restrictions, the element for thering is sentence "including a ..." to limit, it is not excluded that including
There is also other identical elements in the circuit structure of the element, article or equipment.
Those skilled in the art will readily occur to its of the application after considering specification and practicing the disclosure invented here
His embodiment.This application is intended to cover any variations, uses, or adaptations of the invention, these modifications, purposes or
Person's adaptive change follows the general principle of the application and including the undocumented common knowledge in the art of the application
Or conventional techniques.The description and examples are only to be considered as illustrative, and the true scope and spirit of the application are wanted by right
The content asked is pointed out.
Above-described the application embodiment does not constitute the restriction to the application protection scope.
Claims (4)
1. a kind of optical module, which is characterized in that including microprocessor, the first field-effect tube, the second field-effect tube, capacitor and golden hand
Refer to, wherein
It is provided with the first communications pins and the second communications pins on the microprocessor, is provided with data line on the golden finger and draws
Foot and clock wire pin；
The capacitor, the data wire pin and the clock wire pin are connect with the power supply of the optical module respectively；
One end of first field-effect tube connects first communications pins, and the other end connects the data wire pin, grid
With the capacitance connection；
One end of second field-effect tube connects second communications pins, and the other end connects the clock wire pin, grid
With the capacitance connection.
2. optical module as described in claim 1, which is characterized in that concatenate first between the power supply and the data wire pin
Resistance concatenates second resistance between the power supply and the clock wire pin.
3. optical module as described in claim 1, which is characterized in that the power supply is the energization pins on the golden finger.
4. optical module as described in claim 1, which is characterized in that the power supply is the power management chip of the optical module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811474977.1A CN109361467B (en) | 2018-12-04 | 2018-12-04 | Optical module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811474977.1A CN109361467B (en) | 2018-12-04 | 2018-12-04 | Optical module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109361467A true CN109361467A (en) | 2019-02-19 |
| CN109361467B CN109361467B (en) | 2021-07-06 |
Family
ID=65331094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811474977.1A Active CN109361467B (en) | 2018-12-04 | 2018-12-04 | Optical module |
Country Status (1)
| Country | Link |
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| CN (1) | CN109361467B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110460381A (en) * | 2019-08-12 | 2019-11-15 | 青岛海信宽带多媒体技术有限公司 | A kind of optical module |
| CN114285477A (en) * | 2021-12-17 | 2022-04-05 | 青岛海信宽带多媒体技术有限公司 | Optical module |
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| CN206259950U (en) * | 2016-10-25 | 2017-06-16 | 深圳欧陆通电子有限公司 | A kind of communication bus isolation circuit |
| CN106936496A (en) * | 2017-04-20 | 2017-07-07 | 江苏奥雷光电有限公司 | Multiple IIC communication equipments hot plug devices |
| CN108365888A (en) * | 2018-02-01 | 2018-08-03 | 四川泰瑞创通讯技术股份有限公司 | The device of test light module performance |
| CN207819925U (en) * | 2018-02-08 | 2018-09-04 | 衡阳泰豪通信车辆有限公司 | A kind of modular communication networking platform based on fiber buss |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1567278A (en) * | 2003-07-06 | 2005-01-19 | 华为技术有限公司 | Assess controlling system for bus of internal integrated circuit |
| CN206259950U (en) * | 2016-10-25 | 2017-06-16 | 深圳欧陆通电子有限公司 | A kind of communication bus isolation circuit |
| CN106936496A (en) * | 2017-04-20 | 2017-07-07 | 江苏奥雷光电有限公司 | Multiple IIC communication equipments hot plug devices |
| CN108365888A (en) * | 2018-02-01 | 2018-08-03 | 四川泰瑞创通讯技术股份有限公司 | The device of test light module performance |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110460381A (en) * | 2019-08-12 | 2019-11-15 | 青岛海信宽带多媒体技术有限公司 | A kind of optical module |
| CN114285477A (en) * | 2021-12-17 | 2022-04-05 | 青岛海信宽带多媒体技术有限公司 | Optical module |
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| CN109361467B (en) | 2021-07-06 |
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