CN109474350A - A kind of optical module - Google Patents
A kind of optical module Download PDFInfo
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- CN109474350A CN109474350A CN201811505397.4A CN201811505397A CN109474350A CN 109474350 A CN109474350 A CN 109474350A CN 201811505397 A CN201811505397 A CN 201811505397A CN 109474350 A CN109474350 A CN 109474350A
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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
- H04B10/60—Receivers
- H04B10/66—Non-coherent receivers, e.g. using direct detection
- H04B10/69—Electrical arrangements in the receiver
- H04B10/691—Arrangements for optimizing the photodetector in the receiver
- H04B10/6911—Photodiode bias control, e.g. for compensating temperature variations
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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
- H04B10/60—Receivers
- H04B10/66—Non-coherent receivers, e.g. using direct detection
- H04B10/69—Electrical arrangements in the receiver
- H04B10/693—Arrangements for optimizing the preamplifier in the receiver
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
- Amplifiers (AREA)
Abstract
The present invention relates to technical field of photo communication, in particular to a kind of optical module, to solve at low ambient temperatures, TIA is when handling Low-rate traffic, the problem of recovering by the interference signal that the concussion of optical signal generates, cause the erroneous judgement of receiver, lead to system packet loss.Optical module of the embodiment of the present invention, including the receiving unit with trans-impedance amplifier TIA, temperature detecting unit, processing unit, current control unit and the heating unit for being built in the receiving unit；Wherein, heat up one end of unit is connect with current control unit, other end ground connection；Processing unit detects the output signal of temperature detecting unit output, determines current environmental temperature according to output signal；And control signal is generated, control signal is exported to current control unit；Upon the reception of control signals, Xiang Shengwen unit exports electric current to current control unit；Heating unit generates heat under the action of electric current and passes to the TIA in receiving unit.
Description
Technical field
The present invention relates to technical field of photo communication, in particular to a kind of optical module.
Background technique
Growth with people to communication requirement, intelligent acess (Fiber To The x, FTTx) are developed rapidly.
Intelligent acess technology based on passive optical network (Passive Optical Network, PON) technology has obtained extensively in the whole world
General application.
The optical signal of receiving unit uplink compatible receiver 10Gbps and the 2.5Gbps bit rate of optical module, in order to guarantee just
Optical signal is often received, in the prior art configured with the TIA (trans-impedance for supporting 10G bandwidth in receiving unit
Amplifier, trans-impedance amplifier), TIA is for restoring optical signal.The uplink optical signal of 2.5Gbps uses the DFB directly modulated
Laser is sent, and due to device property, the transmitting eye figure of the uplink optical signal of 2.5Gbps can be deposited at rising edge
In the device that the concussion of optical signal, especially performance are poor, the concussion that optical signal generates is in 8~10GHZ frequency range.According to
The TIA of 2.5G bandwidth restores optical signal, and since bandwidth limits, the concussion that optical signal generates can be filtered out, and not will cause receiver
Erroneous judgement.At present to guarantee that 10G service feature is optimal, usual bandwidth accomplishes 7.5GHZ or so.It is low due to the characteristic of TIA itself
The lower bandwidth of temperature compares room temperature to high frequency offset, and with becoming larger for incident optical power, bandwidth is also to high frequency offset, therefore under low temperature
Bandwidth highest near overload point, part of devices may reach 8G or more.For example, overloading point bandwidth at low temperature to high frequency deviation
8.5G is moved on to, then the interference signal between 8~8.5G that light concussion generates can be recovered by the TIA under low temperature.Therefore, exist
Under low temperature environment, the interference signal that the concussion of optical signal generates can be recovered when handling Low-rate traffic, cause to connect by TIA
The erroneous judgement of receipts machine leads to system packet loss.
Summary of the invention
The present invention provides a kind of optical module, to solve it is existing in the prior art at low ambient temperatures, TIA handle it is low
When fast business, the interference signal that the concussion of optical signal generates can be recovered, cause the erroneous judgement of receiver, lead to system packet loss
The problem of.
Based on the above issues, in a first aspect, the embodiment of the present invention provides a kind of optical module, including with trans-impedance amplifier
The receiving unit of TIA further includes temperature detecting unit, processing unit, current control unit and is built in the receiving unit
Heating unit；
Wherein, one end of the heating unit is connect with the current control unit, other end ground connection；
The processing unit, for detecting the output for being used to indicate current environmental temperature of the temperature detecting unit output
Signal determines current environmental temperature according to the output signal；And it is generated according to the current environmental temperature described for controlling
The control signal of the output electric current of current control unit, the control signal is exported to the current control unit；The electricity
Flow control unit, for exporting electric current to the heating unit after the control signal for receiving the processing unit output；Institute
Heating unit is stated, for generating heat under the action of electric current and passing to the TIA in the receiving unit.
Optionally, the processing unit is specifically used for:
According to the first corresponding relationship of output signal and environment temperature, the described defeated of the temperature detecting unit output is determined
The corresponding current environmental temperature of signal out.
Optionally, the temperature detecting unit is temperature sensor, and the output signal is sensor signal.
Optionally, the temperature detecting unit includes first resistor and second resistance；
The first end of the first resistor connects to power supply, and the other end of the first resistor and one end of second resistance connect
It connects, the other end ground connection of the second resistance；One end and the processing that the first resistor is connected with the second resistance are single
The input terminal electrical connection of member.
Optionally, the first resistor is low-temperature coefficient resistance, and the second resistance is thermistor.
Optionally, the processing unit is specifically used for:
When the current environmental temperature is not more than first threshold, generate defeated for controlling the current control unit unlatching
The control signal of electric current out；When the current environmental temperature is greater than the first threshold, generate for controlling the electric current control
Unit processed stops the control signal of output electric current.
Optionally, the current control unit is constant-current source circuit.
Optionally, the processing unit is specifically used for:
According to the second corresponding relationship of environment temperature and output current value, the corresponding output of the current environmental temperature is determined
Current value, and generate the control signal that the output current value is exported for controlling the current control unit.
Optionally, the heating unit is specifically used for:
After the control signal for receiving the processing unit output, and the output is exported to the heating unit
The electric current of current value.
Optionally, the heating unit is adding thermal resistance.
Due to being built-in with heating unit in the receiving unit of the optical module of the embodiment of the present invention, and the temperature in optical module
Detection unit can acquire current environmental temperature, the output signal for indicating current environmental temperature be sent to processing unit, by handling
Unit determines current environmental temperature according to the output signal received, and is generated according to the current environmental temperature determined for controlling
The control signal of the output electric current of current control unit processed, to control the determining current value of current control unit output, heating
Unit generates heat under the action of the electric current that current control unit exports and passes to the TIA in receiving unit, to improve
The environment temperature of TIA avoids TIA that from recovering the interference signal that the concussion of optical signal generates when handling Low-rate traffic,
Further avoid the system packet loss as caused by the erroneous judgement of receiver.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the first optical module of the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of temperature detecting unit of the embodiment of the present invention；
Fig. 3 is the structural schematic diagram of second of optical module of the embodiment of the present invention；
Fig. 4 is the structural schematic diagram of the third optical module of the embodiment of the present invention；
Fig. 5 is the structural schematic diagram of the 4th kind of optical module of the embodiment of the present invention；
Fig. 6 is the structural schematic diagram of the 5th kind of optical module of the embodiment of the present invention.
Specific embodiment
The optical module of the embodiment of the present invention further includes temperature detection list including the receiving unit with trans-impedance amplifier TIA
Member, processing unit, current control unit and the heating unit for being built in the receiving unit；
Wherein, one end of the heating unit is connect with the current control unit, other end ground connection；
The processing unit, for detecting the output for being used to indicate current environmental temperature of the temperature detecting unit output
Signal determines current environmental temperature according to the output signal；And it is generated according to the current environmental temperature described for controlling
The control signal of the output electric current of current control unit, the control signal is exported to the current control unit；The electricity
Flow control unit, for exporting electric current to the heating unit after the control signal for receiving the processing unit output；Institute
Heating unit is stated, for generating heat under the action of electric current and passing to the TIA in the receiving unit.
Due to being built-in with heating unit in the receiving unit of the optical module of the embodiment of the present invention, and the temperature in optical module
Detection unit can acquire current environmental temperature, the output signal for indicating current environmental temperature be sent to processing unit, by handling
Unit determines current environmental temperature according to the output signal received, and is generated according to the current environmental temperature determined for controlling
The control signal of the output electric current of current control unit processed, to control the determining current value of current control unit output, heating
Unit generates heat under the action of the electric current that current control unit exports and passes to the TIA in receiving unit, to improve
The environment temperature of TIA avoids TIA that from recovering the interference signal that the concussion of optical signal generates when handling Low-rate traffic,
Further avoid the system packet loss as caused by the erroneous judgement of receiver.
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into
It is described in detail to one step, it is clear that described embodiments are only a part of the embodiments of the present invention, rather than whole implementation
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
All other embodiment, shall fall within the protection scope of the present invention.
As shown in Figure 1, the optical module of the embodiment of the present invention, comprising: temperature detecting unit 10, processing unit 11, electric current control
Unit 12 processed, receiving unit 13, and it is built in the heating unit 14 of receiving unit 13；
Further, which further includes TIA 131.
Wherein, the output end of temperature detecting unit 10 is connect with the input terminal of processing unit 11, the output of processing unit 11
End is connect with the input terminal of current control unit 12, and the output end of current control unit 12 and the input terminal of heating unit 14 connect
It connects, the output end ground connection of heating unit 14.
Processing unit 11, for detecting the output letter for indicating current environmental temperature of the temperature detecting unit output
Number, current environmental temperature is determined according to the output signal；And it is generated according to the current environmental temperature for controlling the electricity
The control signal of the output electric current of flow control unit, the control signal is exported to the current control unit；
Current control unit 12, for after the control signal for receiving processing unit output, singly to the heating
Member output electric current；
Heat up unit 14, for generating heat under the action of electric current and passing to the TIA in the receiving unit.
Temperature detecting unit in the embodiment of the present invention can there are many forms, below for different temperature detecting units
It is illustrated respectively.
1, temperature detecting unit is temperature sensor.
When temperature detecting unit is temperature sensor, the output signal that processing unit detects is sensor signal.
Optionally, the sensor signal of processing unit detection temperature sensor, according to the biography of the temperature sensor detected
Sensor signal determines current environmental temperature；
Specifically, processing unit 11 determines current environmental temperature according to following manner:
First corresponding relationship of the processing unit according to sensor signal and environment temperature, the biography of temperature sensor output
The corresponding current environmental temperature of sensor signal.
A kind of optional embodiment is to be stored with the first of sensor signal and environment temperature in processing unit corresponding to close
System, processing unit is after the sensor signal for detecting temperature sensor output, according to the first corresponding relationship, determines that the temperature passes
The corresponding environment temperature of sensor signal of sensor output, processing unit are according to the environment temperature that the first corresponding relationship is determined
Current environmental temperature.
2, temperature detecting unit is bleeder circuit unit.
When temperature detecting unit is bleeder circuit unit, the output signal that processing unit detects is voltage signal.
Temperature detecting unit as shown in Figure 2, including first resistor 101 and second resistance 102；Wherein first resistor 101
It can be a resistance, or using forming after the series connection of multiple resistance and/or parallel connection, equally, second resistance 102 can be one
A resistance, or using the series connection of multiple resistance and/or composition later in parallel.
The input terminal of first resistor 101 connects to power supply；
Optionally, the supply voltage of the input terminal access of first resistor 101 is 3.3V；
The output end of first resistor 101 is connect with the input terminal of second resistance 102, the output end ground connection of second resistance 102；
First resistor 101 is electrically connected with one end that second resistance 102 is connected with the input terminal of processing unit 11.
Bleeder circuit according to Fig.2, the output signal of the temperature detecting unit 10 that processing unit 11 detects are the
The voltage at two resistance, 102 both ends.
Optionally, first resistor 101 is low-temperature coefficient resistance, and second resistance 102 is thermistor.
Optionally, the output signal of processing unit detection temperature detecting unit, according to the temperature detecting unit detected, really
Determine current environmental temperature；
Specifically, processing unit 11 is specifically used for:
According to the first corresponding relationship of output signal and environment temperature, the described defeated of the temperature detecting unit output is determined
The corresponding current environmental temperature of signal out.
Processing unit 11 is generated according to current environmental temperature and is used after determining current environmental temperature according to output signal
In the control signal of the output current value of control current control unit；
When temperature detecting unit is bleeder circuit unit, the output signal of temperature detecting unit is the voltage at resistance both ends
Value；
A kind of optional embodiment is the first corresponding relationship that voltage value and environment temperature are stored in processing unit,
Processing unit is after the voltage value for detecting bleeder circuit unit, according to the first corresponding relationship, determines the corresponding ring of the voltage value
Border temperature, processing unit are current environmental temperature according to the environment temperature that the first corresponding relationship is determined.
Processing unit of the embodiment of the present invention is raw according to the current environmental temperature determined after determining current environmental temperature
At the control signal for controlling current control unit output electric current, and the control signal of generation is exported and gives current control list
Member.
In implementation, current control unit can there are many different types, in the type difference of current control unit, processing
The type for the control signal that unit generates is not also identical；
Specifically, the embodiment of the present invention can be the current control unit of output constant current, or being being capable of basis
Control signal exports the current control unit of different current values.A point situation is illustrated below.
1, current control unit exports constant current.
When current control unit exports constant current value, processing unit is generated according to current environmental temperature for controlling electricity
Flow control unit opens or closes the control signal of output electric current；
Specifically, the output signal of processing unit detection temperature detecting unit output, determines to work as according to the output signal
After preceding environment temperature, processing unit exports control signal according to following manner:
Processing unit judges whether the current environmental temperature is greater than first threshold；
When the current environmental temperature is not more than first threshold, generates and open output electricity for controlling current control unit
The control signal of stream；
When the current environmental temperature is greater than the first threshold, generates and close output for controlling current control unit
The control signal of electric current.
Wherein, the first threshold of the embodiment of the present invention is preset numerical value.
Optionally, the current control unit of the embodiment of the present invention is constant-current source circuit.
Correspondingly, current control unit after the control signal for receiving processing unit output, opens or closes output electricity
Stream.
For example, current control unit is receiving the control signal for opening output electric current for controlling current control unit
Afterwards, current control unit exports constant current to heating unit；Current control unit is being received for controlling current control list
After member closes the control signal of output electric current, current control unit closes the constant current exported to heating unit.
Optical module as shown in Figure 3, wherein current control unit is constant-current source circuit；
Optical module as shown in Figure 3 includes temperature detecting unit 10, processing unit 11, constant-current source circuit 12, receiving unit
13, and it is built in the heating unit 14 of receiving unit 13；
It wherein, further include TIA, APD in receiving unit 13.
Temperature detecting unit 10 includes first resistor 101 and second resistance 102；The input terminal and power supply of first resistor 101
Connection, the output end of first resistor 101 are connect with the input terminal of second resistance 102, the output end ground connection of second resistance 102, the
One resistance 101 is electrically connected with one end that second resistance 102 is connected with the input terminal of processing unit 11；The output end of processing unit 11
It is connect with the input terminal of constant-current source circuit 12, the output end of constant-current source circuit 12 is connect with the input terminal of heating unit 14, is heated up
The output end of unit 14 is grounded.
Processing unit 11 detects the voltage value at 102 both ends of second resistance, determines current environment according to the voltage value detected
Temperature.
Processing unit 11 judges whether current environmental temperature is greater than first threshold after determining current environmental temperature；
When determining current environmental temperature no more than first threshold, processing unit 11 is generated for controlling constant-current source circuit 12
The control signal of output electric current is opened, and the control signal of generation is exported to constant-current source circuit 12；Constant-current source circuit 12 is connecing
After receiving control signal, Xiang Shengwen unit 14 exports constant current；
Heating unit 14 generates heat under the action of the constant current, and by the heat transfer of generation to receiving unit 13
In TIA131, so as to improve the temperature of 131 place environment of TIA.
When determining that current environmental temperature is greater than first threshold, processing unit 11 is generated to close for controlling constant-current source circuit 12
The control signal of output electric current is closed, and the control signal of generation is exported to constant-current source circuit 12；Constant-current source circuit 12 is receiving
To after control signal, the constant current exported to heating unit 14 is closed.
As shown in figure 4, the heating unit 14 of the embodiment of the present invention is adding thermal resistance；The input terminal and constant-current source of adding thermal resistance
The output end of circuit 13 connects, the output end ground connection of adding thermal resistance；
Adding thermal resistance is used to generate heat under the constant current effect that constant-current source circuit exports.
2, current control unit exports the electric current of different current values.
When current control unit is to export the current control unit of different current values, processing unit is according to current environment temperature
Degree generates the control signal of the current value for controlling current control unit output；
Specifically, the output signal of processing unit detection temperature detecting unit output, determines to work as according to the output signal
After preceding environment temperature, processing unit exports control signal according to following manner:
Processing unit determines the current environmental temperature pair according to the second corresponding relationship of environment temperature and output current value
The output current value answered, and generate the control signal that the output current value is exported for controlling the current control unit.
A kind of optional embodiment is to be stored with the second of environment temperature and output current value in processing unit corresponding to close
System, processing unit is after determining current environmental temperature, according to the second corresponding relationship, determines that the current environmental temperature is corresponding defeated
Current value out, processing unit are the electricity for needing current control unit to export according to the output current value that the second corresponding relationship is determined
Flow valuve.
Processing unit exports table after determining the corresponding output current value of current environmental temperature, to current control unit
Show the control signal of the output current value of current control unit；
Correspondingly, heating unit is after the control signal for receiving processing unit output, and to the heating
Unit exports the electric current of the output current value.
Optionally, the current control unit of the embodiment of the present invention is to be switched by P-channel metal-oxide-semiconductor, amplifier and Fast simulation
The current source circuit of composition.
Optical module as shown in Figure 5 includes temperature detecting unit 10, processing unit 11, current source circuit 12, receiving unit
13, and it is built in the heating unit 14 of receiving unit 13；
It wherein, further include TIA, APD in receiving unit 13.
Temperature detecting unit 10 includes first resistor 101 and second resistance 102；The input terminal and power supply of first resistor 101
Connection, the output end of first resistor 101 are connect with the input terminal of second resistance 102, the output end ground connection of second resistance 102, the
One resistance 101 is electrically connected with one end that second resistance 102 is connected with the input terminal of processing unit 11；
The output end of processing unit 11 is connect with the input terminal of current source circuit 12, the output end and liter of current source circuit 12
The input terminal of warm unit 14 connects, the output end ground connection of heating unit 14.
Processing unit 11 detects the voltage value at 102 both ends of second resistance, determines current environment according to the voltage value detected
Temperature.
Processing unit 11 determines the current value of current source circuit output according to the current environmental temperature determined, and generates control
Signal processed；For current source circuit 12 after receiving the control signal, Xiang Shengwen unit exports the output electric current of the current value.
Heating unit 14 generates heat under the action of the constant current, and by the heat transfer of generation to receiving unit 13
In TIA 131, so as to improve the temperature of 131 place environment of TIA.
As shown in fig. 6, the heating unit 14 of the embodiment of the present invention is adding thermal resistance；The input terminal and constant-current source of adding thermal resistance
The output end of circuit 13 connects, the output end ground connection of adding thermal resistance；
Adding thermal resistance is used to generate heat under the constant current effect that constant-current source circuit exports.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of optical module, including the receiving unit with trans-impedance amplifier TIA, which is characterized in that further include temperature detection list
Member, processing unit, current control unit and the heating unit for being built in the receiving unit；
Wherein, one end of the heating unit is connect with the current control unit, other end ground connection；
The processing unit, for detecting the output letter for indicating current environmental temperature of the temperature detecting unit output
Number, current environmental temperature is determined according to the output signal；And it is generated according to the current environmental temperature for controlling the electricity
The control signal of the output electric current of flow control unit, the control signal is exported to the current control unit；
The current control unit, for after the control signal for receiving processing unit output, to the heating unit
Export electric current；
The heating unit, for generating heat under the action of electric current and passing to the TIA in the receiving unit.
2. optical module as described in claim 1, which is characterized in that the processing unit is specifically used for:
According to the first corresponding relationship of output signal and environment temperature, the output letter of the temperature detecting unit output is determined
Number corresponding current environmental temperature.
3. optical module as claimed in claim 2, which is characterized in that the temperature detecting unit is temperature sensor, described defeated
Signal is sensor signal out.
4. optical module as claimed in claim 2, which is characterized in that the temperature detecting unit includes first resistor and the second electricity
Resistance；
The first end of the first resistor connects to power supply, and the other end of the first resistor and one end of second resistance connect,
The other end of the second resistance is grounded；One end that the first resistor is connected with the second resistance and the processing unit
Input terminal electrical connection.
5. optical module as claimed in claim 4, which is characterized in that the first resistor is low-temperature coefficient resistance, described the
Two resistance are thermistor.
6. optical module as described in claim 1, which is characterized in that the processing unit is specifically used for:
When the current environmental temperature is not more than first threshold, generates and open output electricity for controlling the current control unit
The control signal of stream；When the current environmental temperature is greater than the first threshold, generate for controlling the current control list
Member closes the control signal of output electric current.
7. optical module as claimed in claim 6, which is characterized in that the current control unit is constant-current source circuit.
8. optical module as described in claim 1, which is characterized in that the processing unit is specifically used for:
According to the second corresponding relationship of environment temperature and output current value, the corresponding output electric current of the current environmental temperature is determined
Value, and generate the control signal that the output current value is exported for controlling the current control unit.
9. optical module as claimed in claim 8, which is characterized in that the heating unit is specifically used for:
After the control signal for receiving the processing unit output, and the output electric current is exported to the heating unit
The electric current of value.
10. optical module as described in any one of claims 1 to 9, which is characterized in that the heating unit is adding thermal resistance.
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|---|---|---|---|
| CN201811505397.4A CN109474350B (en) | 2018-12-10 | 2018-12-10 | Optical module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811505397.4A CN109474350B (en) | 2018-12-10 | 2018-12-10 | Optical module |
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| CN109474350B CN109474350B (en) | 2022-04-12 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102412240A (en) * | 2011-10-13 | 2012-04-11 | 武汉华工正源光子技术有限公司 | APD-TIA (Avalanche Photodiode-Transfer-Impedance Amplifier) coaxial photoelectric module with temperature control function and fabrication method thereof |
| CN102426823A (en) * | 2011-09-21 | 2012-04-25 | 友达光电股份有限公司 | Active protection circuit for controlling temperature of light-emitting diode (LED) backlight driver |
| US20120301151A1 (en) * | 2011-05-24 | 2012-11-29 | Zhaoyang Hu | Low Power Consumption, Long Range, Pluggable Transceiver, Circuits and Devices Therefor, and Method(s) of Using the Same |
| CN106253988A (en) * | 2013-05-24 | 2016-12-21 | 青岛海信宽带多媒体技术有限公司 | Optical module and operating temperature control method thereof |
-
2018
- 2018-12-10 CN CN201811505397.4A patent/CN109474350B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120301151A1 (en) * | 2011-05-24 | 2012-11-29 | Zhaoyang Hu | Low Power Consumption, Long Range, Pluggable Transceiver, Circuits and Devices Therefor, and Method(s) of Using the Same |
| CN102426823A (en) * | 2011-09-21 | 2012-04-25 | 友达光电股份有限公司 | Active protection circuit for controlling temperature of light-emitting diode (LED) backlight driver |
| CN102412240A (en) * | 2011-10-13 | 2012-04-11 | 武汉华工正源光子技术有限公司 | APD-TIA (Avalanche Photodiode-Transfer-Impedance Amplifier) coaxial photoelectric module with temperature control function and fabrication method thereof |
| CN106253988A (en) * | 2013-05-24 | 2016-12-21 | 青岛海信宽带多媒体技术有限公司 | Optical module and operating temperature control method thereof |
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| CN109474350B (en) | 2022-04-12 |
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