CN107317632B - A kind of optical module - Google Patents
A kind of optical module Download PDFInfo
- Publication number
- CN107317632B CN107317632B CN201710560930.6A CN201710560930A CN107317632B CN 107317632 B CN107317632 B CN 107317632B CN 201710560930 A CN201710560930 A CN 201710560930A CN 107317632 B CN107317632 B CN 107317632B
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- Prior art keywords
- current
- control circuit
- optical module
- chip
- limiting control
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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
Abstract
The present invention relates to a kind of optical modules; including transmitting driving chip, the MCU chip for receiving driving chip and being all connected with transmitting driving chip and reception driving chip; it is characterized in that, further including the first current-limiting control circuit for current-limiting protection optical module and the second current-limiting control circuit for current-limiting protection MCU chip；The input terminal of first current-limiting control circuit connects external power supply power supply, and output end branch is connected to the power input of the power input of transmitting driving chip, the input terminal of the second current-limiting control circuit and reception driving chip；The output end of second current-limiting control circuit is connected to the power input of MCU chip.It effectively solves the problems, such as to burn out each chip in optical module because of overcurrent, improves optical module in application circumstances functional reliability and service lifes such as radiation.
Description
Technical field
The invention belongs to technical field of photo communication, and in particular to a kind of optical module.
Background technique
Optical module is commonly used in optical communication technique, and function is to complete the conversion of photosignal, inputs one in transmitting terminal
The electric signal of constant bit rate drives semiconductor laser or light emitting diode to launch accordingly after internal driving chip processing
The modulated optical signal of rate, it is internal to have optical power automatic control circuit, make the optical signal power of output keep stablizing, the light
Signal is transferred out by optical fiber, is converted to electricity by optical detection diode after the optical signal input module of one constant bit rate of receiving end
Signal.
With the Rapid Popularization of optic communication, optical module is widely applied.Conventional criteria optical module circuit design such as Fig. 1
Shown, power Vcc is directly to transmitting driving chip, reception driving chip, single-chip microprocessor MCU chip and transmitting light group in optical module
Part (TOSA, such as semiconductor laser or light emitting diode etc.) and reception optical assembly (ROSA, such as optical detection diode etc.)
It is powered, guarantees the normal photoelectric converting function of optical module, wherein TOSA connection emits driving chip, and ROSA connection, which receives, drives
Dynamic chip, and emit driving chip and receive driving chip and connect with MCU chip.But the optical module of standard meets not at present
Use under special occasions, such as under radiation environment, due to radiation can make to emit driving chip/reception driving chip and/
Or the operating current of single-chip microprocessor MCU chip increases, and causes chip overcurrent to burn out, optical module operational failure.Therefore, it is necessary to optical mode
Block designs a current-limiting protection circuit, guarantees that optical module is avoided that permanent damages in certain particular surroundings overcurrents.
Summary of the invention
The purpose that the present invention provides a kind of optical module is, effectively solves to burn out asking for each chip in optical module because of overcurrent
Topic improves functional reliability and service life of the optical module under the application circumstances such as radiation.
In order to solve the above-mentioned technical problem, following technical solution proposed by the invention is resolved:
A kind of optical module, including emit driving chip, receive driving chip and drive core with transmitting driving chip and reception
The MCU chip that piece is all connected with, which is characterized in that further include for optical module described in current-limiting protection the first current-limiting control circuit and
The second current-limiting control circuit for MCU chip described in current-limiting protection；The input terminal connection of first current-limiting control circuit is outer
Portion's power supply, and output end branch is connected to the power input of the transmitting driving chip, second Current limited Control electricity
The input terminal on road and the power input for receiving driving chip；The output end of second current-limiting control circuit is connected to institute
State the power input of MCU chip.
For the ease of making the optical module restore to work normally after optical module short supply interruption, the first Current limited Control electricity
Road includes the first autonomous restoring circuit, for restoring the conducting of first current-limiting control circuit, is realized to the optical module
Power supply.
Further, as the alternative side of another kind for working normally the optical module after optical module short supply interruption
Case, or the control optical module power-off when optical module is transmitted without data, the optical module further include for described first
The external system of current-limiting control circuit connection controls chip, leads on-off to first current-limiting control circuit for controlling
It opens, realizes the power supply or power-off to the optical module.
For the ease of making the MCU chip restore to work normally after MCU chip short supply interruption, second Current limited Control
Circuit includes the second autonomous restoring circuit, for restoring the conducting of second current-limiting control circuit, is realized to the MCU chip
Power supply.
For the ease of after optical module short supply interruption can to the optical module issue restore work normally instruction or
Control optical module power-off when optical module is transmitted without data, the optical module further include for electric with first Current limited Control
The external system of road connection controls chip, is turned on or off for controlling to first current-limiting control circuit, realizes to institute
State the power supply or power-off of optical module.
Further, in order to improve the fault-detecting ability of the optical module, in the first current-limiting control circuit open circuit,
The external system control chip receives the fault message of the optical module power-off.
Compared with prior art, the advantages of optical module of the invention and beneficial effect is: under radiation effect, MCU chip
Increase with transmitting/reception driving chip operating current and the operating current of MCU chip is relative to transmitting/reception driving chip
Operating current it is sensitive, the first current-limiting control circuit and the second current-limiting control circuit are designed for optical-electric module, in MCU chip
When operating current increases, the second current-limiting control circuit detects the electric current and controls the second current-limiting control circuit and disconnects, so that MCU
Powering down chips realize the protection to MCU chip, when transmitting/reception driving chip operating current increases, the first Current limited Control
Circuit detects that the electric current increases and controls the disconnection of the first current-limiting control circuit, so that optical module integrally powers off, realizes to optical mode
The protection of block avoids the danger burnt due to by overcurrent in each chip, improves the functional reliability of optical module, and extend it to make
Use the service life.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, the present invention will be implemented below
Example or attached drawing needed to be used in the description of the prior art are made one and are briefly introduced, it should be apparent that, drawings discussed below is this
Some embodiments of invention without creative efforts, may be used also for those of ordinary skill in the art
With other accompanying drawings can also be obtained according to these attached drawings.
Fig. 1 is a kind of circuit diagram of embodiment of conventional criteria optical module；
Fig. 2 is a kind of circuit diagram of embodiment of optical module proposed by the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
As shown in Figure 1, in conventional criteria optical module, by external power supply power Vcc respectively to transmitting driving chip,
TOSA, MCU chip receive driving chip, ROSA and are powered, and MCU chip by I2C bus respectively with transmitting driving chip
It is connect with driving chip is received.When transmitting, electric signal drives after being input to transmitting driving chip and the processing of emitted driving chip
TOSA transmitting optical signal simultaneously exports；When reception, optical signal is received by ROSA and generates response current corresponding with the optical signal, it should
Response current is input to reception driving chip, exports electric signal after received driving chip processing, completes photoelectric conversion process.
In optical module, the operating current (such as 10mA) of MCU chip much smaller than transmitting/reception driving current (such as
100mA), when and under the particular surroundings such as radiation, MCU chip and transmitting/reception driving chip electric current be will increase, and MCU
Chip is more sensitive to radiation effect, therefore, as shown in Fig. 2, in the present embodiment, it is complete in order to be carried out to chip each in optical module
Face reliably protecting avoids the current-limiting protection control circuit being added at optical module feeder ear Vcc that from cannot correctly judging MCU chip
Electric current increases, and individually carries out current-limiting protection to MCU chip, specifically, current-limiting protection control circuit includes for transmitting/reception
The first current-limiting control circuit of power-off protection is carried out when driving chip overcurrent and for MCU chip overcurrent when carries out power-off protection
The second current-limiting control circuit, the input terminal of the first current-limiting control circuit connects external power supply power Vcc, and output end branch connects
It is connected to the power input of transmitting driving chip, the input terminal of the second current-limiting control circuit and the power input for receiving driving chip
End；And second the output end of current-limiting control circuit be connected to the power input of the MCU chip.
Specifically, as shown in Fig. 2, when MCU chip causes electric current to increase because of radiation effect, the second current-limiting control circuit
It can detect that the electric current increases, and itself circuit is disconnected, the voltage vcc 2 that the second current-limiting control circuit exports cannot be sent out
It send to MCU chip, so that MCU chip powers off, prevents MCU chip from burning because of overcurrent, the safety of MCU chip is protected to realize
Shield.Due to being pre-configured with for MCU chip short supply interruption and optical module, optical module can still keep normal operating conditions.
For the ease of making the MCU chip restore to work normally after MCU chip short supply interruption, the second current-limiting control circuit
It can be extensive by the second autonomous restoring circuit in second current-limiting control circuit open circuit itself including the second autonomous restoring circuit
The conducting of multiple second current-limiting control circuit, so that the second current-limiting control circuit continues to provide MCU chip input electricity
Vcc2 is pressed, realizes the normal power supply to the MCU chip.
If when transmitting/reception driving chip caused electric current to increase because of radiation effect, the first current-limiting control circuit meeting
It detects that the electric current increases, and itself circuit is disconnected, the voltage vcc 1 that the first current-limiting control circuit exports cannot be sent
To transmitting/reception driving chip, so that transmitting/reception driving chip power-off, prevents transmitting/reception driving chip from burning because of overcurrent
It ruins, to realize to the safeguard protection of transmitting/reception driving chip.Due to the first current-limiting control circuit an output branch according to
It is secondary to be connected with the input terminal of the second current-limiting control circuit and MCU chip, and the input voltage of TOSA and ROSA is all from the first limit
The voltage vcc 1 of flow control circuit output, therefore, in the case where the open circuit of the first current-limiting control circuit, entire optical module will be broken
Electricity protects optical module not to be burned out.
For the ease of working normally the module recovery, the first current-limiting control circuit includes the
One autonomous restoring circuit can restore first by the first autonomous restoring circuit in first current-limiting control circuit open circuit itself
The conducting of current-limiting control circuit, so as to so that the first current-limiting control circuit continues to transmitting/reception driving chip, the second current limliting
Control circuit, TOSA and ROSA provide input voltage Vcc1, realize the normal power supply to optical module.Alternatively, by with first
The external system of current-limiting control circuit connection controls chip (such as FPGA, DSP etc.), sends and restores to the first current-limiting control circuit
Power supply instruction so that restore the first current-limiting control circuit conducting, so as to so that the first current-limiting control circuit continue to transmitting/
It receives driving chip, the second current-limiting control circuit, TOSA and ROSA and input voltage Vcc1 is provided, realize the normal confession to optical module
Electricity.Or when optical module is not used in data transmission, chip can be controlled by external system and be sent out to the first current limit control module
Power-off signal is sent, so that first current limit control module itself is breaking, transmitting/reception driving chip, the second current limliting cannot be provided to
The voltage vcc 1 of control circuit, TOSA and ROSA reduces system power dissipation, improves the work of entire optical module so that optical module powers off
Make the control and management of state.Also, when optical module is powered off because of overcurrent, the first current-limiting control circuit can be by optical module
Power supply trouble reports to external system control chip, subsequent to the power supply of the first current-limiting control circuit for external system control chip
Or continue to remain powered off, improve the fault-detecting ability of optical module.Furthermore, it is possible to the fault message is shown, such as
It is shown on a display screen by controlling the display module that chip is connect with external system, or is connected by controlling chip with external system
The voice playing module connect is by loudspeaker broadcasting etc..
The optical module of the present embodiment, under the application circumstances such as radiation, when the operating current of MCU chip increases, second
Current-limiting control circuit detects the electric current and controls the second current-limiting control circuit and disconnects, so that MCU chip powers off, realizes to MCU
The protection of chip, when transmitting/reception driving chip operating current increases, the first current-limiting control circuit detects that the electric current increases
Big and the first current-limiting control circuit of control disconnects, so that optical module integrally powers off, realizes the protection to optical module, avoids in each core
The danger that piece is burnt due to by overcurrent, improves the functional reliability of optical module, and prolong its service life；It is powered off in optical module
When, disconnection fault can be uploaded to external system control chip, improve the fault-detecting ability of optical module；In optical module or MCU
When powering down chips, which can independently restore electricity, and improve the using flexible of optical module；It does not need to transmit in optical module
When, external system controls the power-off of chip controls optical module, and optical module power consumption is effectively reduced, prolongs its service life.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (7)
1. a kind of optical module, including transmitting driving chip, receive driving chip and with transmitting driving chip and receive driving chip
The MCU chip being all connected with, which is characterized in that further include in the transmitting driving chip and/or reception driving chip overcurrent
When the first current-limiting control circuit for disconnecting and the second current-limiting control circuit for being disconnected in the MCU chip overcurrent；It is described
The input terminal of first current-limiting control circuit connects external power supply power supply, and output end branch is connected to the transmitting driving chip
The input terminal and the power input for receiving driving chip of power input, second current-limiting control circuit；Described
The output end of two current-limiting control circuits is connected to the power input of the MCU chip.
2. optical module according to claim 1, which is characterized in that first current-limiting control circuit includes first autonomous extensive
Compound circuit realizes the power supply to the optical module for restoring the conducting of first current-limiting control circuit.
3. optical module according to claim 1 or 2, which is characterized in that second current-limiting control circuit include second from
Main restoring circuit realizes the power supply to the MCU chip for restoring the conducting of second current-limiting control circuit.
4. optical module according to claim 1 or 2, which is characterized in that further include for electric with first Current limited Control
The external system of road connection controls chip, is turned on or off for controlling to first current-limiting control circuit, realizes to institute
State the power supply or power-off of optical module.
5. optical module according to claim 3, which is characterized in that further include for connecting with first current-limiting control circuit
The external system control chip connect, is turned on or off to first current-limiting control circuit for controlling, realizes to the light
The power supply or power-off of module.
6. optical module according to claim 4, which is characterized in that described in the first current-limiting control circuit open circuit
External system control chip receives the fault message of the optical module power-off.
7. optical module according to claim 5, which is characterized in that described in the first current-limiting control circuit open circuit
External system control chip receives the fault message of the optical module power-off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710560930.6A CN107317632B (en) | 2017-07-11 | 2017-07-11 | A kind of optical module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710560930.6A CN107317632B (en) | 2017-07-11 | 2017-07-11 | A kind of optical module |
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| Publication Number | Publication Date |
|---|---|
| CN107317632A CN107317632A (en) | 2017-11-03 |
| CN107317632B true CN107317632B (en) | 2019-12-03 |
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| CN201710560930.6A Active CN107317632B (en) | 2017-07-11 | 2017-07-11 | A kind of optical module |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108390728B (en) * | 2018-02-24 | 2020-03-06 | 青岛海信宽带多媒体技术有限公司 | Optical module power-on control method and device |
| CN114019622A (en) * | 2021-11-09 | 2022-02-08 | 山东中和光电科技有限公司 | Military module packaged by Mini SFP |
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| CN101080118A (en) * | 2006-05-22 | 2007-11-28 | 陈建中 | Current control device of LED module |
| CN101394230A (en) * | 2008-10-30 | 2009-03-25 | 武汉电信器件有限公司 | Intelligent 10Gbps pluggable light transceiving module and main work flow thereof |
| CN202617126U (en) * | 2011-06-14 | 2012-12-19 | 苏州旭创科技有限公司 | 10G SFP+ (enhanced 8.5 and 10Gigabit small form factor pluggable module) LR optical module |
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| CN107317632A (en) | 2017-11-03 |
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Address after: 266100 Songling Road, Laoshan District, Qingdao, Shandong Province, No. 399 Patentee after: Qingdao Xinghang Photoelectric Technology Co.,Ltd. Address before: 266104 in the investment service center of Beizhai sub district office, beizhaike community, Laoshan District, Qingdao City, Shandong Province Patentee before: HISENSE & JONHON OPTICAL-ELECTRICAL TECHNOLOGIES Co.,Ltd. |
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