CN105978622A - Optical module and RF signal output control circuit thereof - Google Patents
Optical module and RF signal output control circuit thereof Download PDFInfo
- Publication number
- CN105978622A CN105978622A CN201610305359.9A CN201610305359A CN105978622A CN 105978622 A CN105978622 A CN 105978622A CN 201610305359 A CN201610305359 A CN 201610305359A CN 105978622 A CN105978622 A CN 105978622A
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- Prior art keywords
- optical module
- door
- radio frequency
- outfan
- frequency signal
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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
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/073—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an out-of-service signal
- H04B10/0731—Testing or characterisation of optical devices, e.g. amplifiers
-
- 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)
- Amplifiers (AREA)
Abstract
The invention relates to an optical module and an RF signal output control circuit thereof, and belongs to the technical field of optical communication. The optical module comprises an RF signal amplifier, a field effect transistor (FET), an OR gate, a first voltage dividing resistor and a second voltage dividing resistor in serial connection with the first voltage dividing resistor; the grid electrode of the FET is electrically connected with the output end of the RF signal amplifier, the source electrode of the FET is electrically connected with the positive voltage input end, and the drain electrode of the FET is connected with the voltage dividing resistors successively electrically; one input end of the OR gate is grounded, the other input end of the OR gate is connected to the voltage dividing resistors, and high/low level output by the output end of the OR gate is used to detect whether the RF signal amplifier outputs signals. According to the scheme, the output state of low-amplitude RF signals in the optical module can be determined accurately, level output by the OR gate is stable, the problem frequent jumping of the output high/low level is avoided, and the detection precision for the low-amplitude RF signals in the optical module can be improved.
Description
[technical field]
The present invention relates to technical field of photo communication, concrete, relate to a kind of optical module.
[background technology]
Optical module is a kind of optical active devices realizing optical-electronic conversion and electrical-optical conversion, is optic communication
The critical function module of equipment.Along with constantly carrying of the technical specifications such as optical communication equipment bandwidth and transmission range
Rising, sensitivity and integrated level to optical module require more and more higher, and the power consumption of optical module also becomes more to come
The biggest, it is therefore desirable to improve the sensitivity of optical module as far as possible.
In the communication systems such as existing optical module, more and more it is integrated with radio frequency signal amplifiers and radio frequency
Signal output module.But owing in optical module, the amplitude of radiofrequency signal output is relatively low, the most only tens
DB microvolt, is therefore difficult to judge whether radiofrequency signal output amplitude is in normal operating conditions, and the most normal
Comparator judging means be difficult to accurately judge radiofrequency signal output state, and if radiofrequency signal output
Instability, uses what comparator can detect radiofrequency signal to have stateless frequent saltus step, reduces this optical mode
The accuracy of detection of block small amplitude radio frequency output signal.
[summary of the invention]
The purpose of the present invention aims to solve the problem that any one problem above-mentioned, it is provided that a kind of optical module, accordingly,
Additionally provide a kind of optical module radiofrequency signal output control circuit.
For realizing this purpose, the present invention adopts the following technical scheme that
The invention provides a kind of optical module, it includes radio frequency signal amplifiers, field effect transistor or door
And divider resistance；
Described field effect transistor, its grid electrical connection outfan of described radio frequency signal amplifiers, source electrode are electrically connected
Connect voltage positive input terminal, drain electrode is electrically connected with divider resistance, defeated for by described radio frequency signal amplifiers
Do well its on or off of driving；
Described or door, one input end ground connection, another input connect one end of described divider resistance, use
In the level height utilizing its outfan to export, detect whether described radio frequency signal amplifiers has signal to export.
Present invention also offers a kind of optical module radiofrequency signal output control circuit, it includes aforesaid light
Module and the switch being electrically connected to each other and power supply；
Described switch, electrical connection is described or the outfan of door, by the varying level of the outfan of described or door
Control it and be switched on or switched off state；
Described power supply, for powering for described radio frequency signal amplifiers, by its break-make of described on-off control.
Compared with prior art, the present invention possesses following advantage:
1, a kind of optical module in this programme, includes field effect transistor and or door, wherein field effect transistor
Grid electrical connection needs the outfan of the radio frequency signal amplifiers of detection, is exported by radio frequency signal amplifiers
Radiofrequency signal drive conducting and the cut-off state of this field effect transistor, due to fet gate and source electrode
Between can change its channel width by faint change in voltage, thus control drain electrode and source electrode accordingly
Between electric current, improved in this programme radio frequency by a small margin by the highly sensitive feature of field effect transistor
The accuracy of detection of signal；And utilize or door the drain electrode sampling voltage of this field effect transistor is asked with earth signal
Or, the feature of the level equalization of utilization or door output judges whether radio frequency signal amplifiers is radiofrequency signal
Normal output, can accurately judge the output state of the radiofrequency signal of optical module small amplitude, and or door output
Level equalization, the problem not havinging the frequent saltus step of low and high level of output, improve medium and small to optical module
The accuracy of detection of the radiofrequency signal of amplitude；
2, a kind of optical module radiofrequency signal output control circuit in this programme, except including aforementioned detection
Outside the optical module that precision is high, also include switch and the power supply powered to this radio frequency ejecting end, utilize or door
The low and high level of outfan, drive with should or being switched on or switched off of the switch that electrically connects of the outfan of door
State, recycles described switch to control the break-make of power supply；Thus radiofrequency signal is put in described optical module
When big device is without normally exporting, or door output low level drives and switches off, thus controls power supply and be broken as penetrating
Frequently signal amplifier is powered, and closes radio frequency signal amplifiers, to reduce the power consumption of whole system.
Aspect and advantage that the present invention adds will part be given in the following description, and these are by from following
Description becomes obvious, or recognized by the embodiment of this programme.
[accompanying drawing explanation]
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, below will be to embodiment or existing
In technology description, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below
It is only some embodiments of the present invention, but the invention is not restricted to this.
Fig. 1 is the structural representation in an embodiment of a kind of optical module of the present invention；
Fig. 2 is the structure in an embodiment of the present invention a kind of optical module radiofrequency signal output control circuit
Schematic diagram；
Fig. 3 is the structure in an embodiment of the present invention a kind of optical module radiofrequency signal output control circuit
Schematic diagram；
Fig. 4 is an enforcement of control method in the present invention a kind of optical module radiofrequency signal output control circuit
The flow chart of example.
[detailed description of the invention]
With exemplary embodiment, the present invention is further described below in conjunction with the accompanying drawings, described embodiment
Example is shown in the drawings, and the most same or similar label represents same or similar element
Or there is the element of same or like function.The embodiment described below with reference to accompanying drawing is exemplary,
It is only used for explaining the present invention, and is not construed as limiting the claims.Additionally, if it is known that technology
Describe in detail and the invention is characterized in that unnecessary for illustrating, then omitted.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singulative used herein
" one ", " one ", " described " and " being somebody's turn to do " may also comprise plural form.Will be further understood that
, the wording used in the description of the present invention " includes " referring to there is described feature, integer, step
Suddenly, operation, element and/or assembly, but it is not excluded that existence or add other features one or more,
Integer, step, operation, element, assembly and/or their group.It should be understood that when we claim element quilt
" connecting " or during " coupled " to another element, it can be directly connected or coupled to other elements, or
Intermediary element can also be there is in person.Additionally, " connection " used herein or " coupling " can include nothing
Line connects or wireless couples.Wording "and/or" used herein includes one or more row being associated
Go out the whole of item or any cell and all combinations.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (bag
Include technical term and scientific terminology), have with the those of ordinary skill in art of the present invention is general
Understand identical meaning.Should also be understood that those terms defined in such as general dictionary, it should
It is understood to that there is the meaning consistent with the meaning in the context of prior art, and unless as here one
Sample, by specific definitions, otherwise will not be explained by idealization or the most formal implication.
The detailed description of the invention of this programme is detailed below.
Concrete, refer to accompanying drawing 1, for a kind of optical module described in this programme, this optical module includes
The photodetector being electrically connected to each other and radio frequency signal amplifiers, wherein photodetector is for the light that will receive
Signal is converted into the signal of telecommunication, then the input that this signal of telecommunication is input to radio frequency signal amplifiers is amplified
Process.In an embodiment of this programme, described photodetector can be PIN photodiode or snow
Avalanche photo diode APD.
Further, the output signal of the radio frequency signal amplifiers of this optical module only has tens under normal circumstances
DB microvolt, uses the judging means such as common comparator to be difficult to accurately judge the output state of radiofrequency signal,
And when the radiofrequency signal instability of output, will also result in signal has stateless frequent change, further
Increase the detection difficulty of radio frequency output signal in this optical module.In this programme, by radio frequency signal amplifiers
The radiofrequency signal by a small margin that outfan RFout is exported is after the first sampling resistor R1, and input is shown up
The grid of effect pipe Q1, and the positive input terminal of the source electrode electrical connection voltage VCC of this field effect transistor Q1,
Its drain electrode has been sequentially connected in series the first divider resistance R2 and the second divider resistance R3, and this second divider resistance
R3 ground connection, and the public connecting end concatenated at this first divider resistance R2 and the second divider resistance R3
Access or a wherein input A of door, be somebody's turn to do or another input B ground connection of door, i.e. this programme utilizes
Or the drain electrode sampling voltage of field effect transistor Q1 and earth signal are asked by door or, and then can by should or door
The level height that the height of output level of outfan C judges or an input A of door is inputted,
Then the on or off state of field effect transistor Q1 is judged；Further, this voltage VCC end connects has
Filter capacitor C1, C2 and C3 of ground connection, for filtering the noise in inputted voltage VCC, from
And reduce the noise interference to this testing circuit in this voltage VCC.
Concrete, when or time the outfan C of door is output as high level, should or a wherein input A of door
Also must be high level, i.e. show have electric current to flow through in the second divider resistance R3, field effect transistor Q1 turns on,
The outfan RFout of the radio frequency signal amplifiers necessarily connecting the grid of this field effect transistor Q1 has signal defeated
Go out；Otherwise, when the outfan RFout of radio frequency signal amplifiers does not has signal to export, field effect transistor Q1
Cut-off, its drain electrode does not has electric current, then should or the level of an input A of door be low, this or the output of door
The output level of end C is also low.Concrete, in one embodiment of the invention, described field effect transistor
Q1 is PMOS.
Further, whether photodetector detects light in this optical module of user's visual perception for convenience
Whether the outfan RFout of signal, i.e. this radio frequency signal amplifiers has signal to export, described or door
Outfan C can be accessed by indicating member.Concrete, in one exemplary embodiment of the present invention, described
Indicating member may refer to show lamp and/or speaker, be used for sending sound or light can perceptual signal, in time to
User sends appreciable indication signal.
Therefore, a kind of optical module in this programme, by the outfan RFout of radio frequency signal amplifiers
The radiofrequency signal of output drives conducting and the cut-off state of this field effect transistor Q1, due to field effect transistor grid
Its channel width can be changed by faint change in voltage between pole and source electrode, thus control leakage accordingly
Electric current between pole and source electrode, is improved in this programme little by the highly sensitive feature of field effect transistor
The accuracy of detection of amplitude radio frequency signal；And utilize or door to the drain electrode sampling voltage of this field effect transistor Q1 with
Earth signal carry out asking or, utilize or the feature of level equalization of door output judge radio frequency signal amplifiers
Whether outfan RFout is that radiofrequency signal normally exports, and can accurately judge the radio frequency of optical module small amplitude
The output state of signal, and or door output level equalization, the low and high level not havinging output is frequently jumped
The problem become, improves the accuracy of detection of the radiofrequency signal to optical module small amplitude.
Further, refer to accompanying drawing 2, present invention also offers a kind of optical module radiofrequency signal output control
Circuit processed, this circuit, in addition to the described optical module included in aforementioned schemes, also includes and is electrically connected to each other
Switch and power supply, wherein this power supply be described radio frequency signal amplifiers provide electric energy, this switch can control
The break-make of this power supply.Wherein this optical module includes the photodetector being electrically connected to each other and radiofrequency signal is amplified
Device, wherein photodetector for being converted into the signal of telecommunication by the optical signal received, then is inputted by this signal of telecommunication
Input to radio frequency signal amplifiers is amplified processing.In an embodiment of this programme, described
Photodetector can be PIN photodiode or avalanche photodide APD.
Concrete, when the outfan RFout of radio frequency signal amplifiers does not has signal to export, field effect transistor
Q1 ends, and its drain electrode does not has electric current, and the i.e. second divider resistance R3 two ends do not have voltage difference, then be somebody's turn to do or door
The level of an input A be low, should or the output level of outfan C of door also be low, low level is tactile
Switch off described in Faing, i.e. power supply is broken as described radio frequency signal amplifiers and powers, and saves whole system
Power consumption；Otherwise, when the outfan RFout of radio frequency signal amplifiers has signal to export, field effect transistor Q1
Conducting, its drain electrode has electric current to flow through, and the second divider resistance R3 two ends exist voltage difference, then be somebody's turn to do or door
The level of an input A be high, with or door other end B earth signal phase or after, should or door defeated
Going out to hold C to export high level, this high level triggers described switch connection, and power supply is that described radiofrequency signal is amplified
Device is powered.It can be appreciated that in one exemplary embodiment of the present invention, described switch can be numeral
Switch.
Further, accompanying drawing 3, in one embodiment of the invention, described optical module radio frequency are referred to
Signal output control circuit also includes the controller electrically connected with described switch, can control the logical of this switch
Disconnected, thus control the break-make of power supply, when the outfan RFout of radio frequency signal amplifiers does not has signal normal
During output, cutting off this power supply is that radio frequency signal amplifiers is powered.Optionally, in an example of the present invention
In property embodiment, described controller is MCU.
Concrete, described controller electrical connection described first divider resistance R2's and the second divider resistance R3
Public connecting end, i.e. this controller can detect the voltage at the second divider resistance R3 two ends.Work as radiofrequency signal
When the outfan RFout of amplifier does not has signal to export, field effect transistor Q1 is ended, and its drain electrode does not has electricity
Stream, therefore the voltage at the second divider resistance R3 two ends that this controller detects is close to zero, thus sends out
Go out control signal to control to switch off, i.e. cut off the electricity supply and power for radio frequency signal amplifiers, thus reduce system
The power consumption of system；Otherwise, when radio frequency signal amplifiers has signal to export, field effect transistor Q1 turns on, its
Drain electrode has electric current to flow through, and the now existence at the second divider resistance R3 two ends that controller detects is much larger than
The voltage of zero, thus send control signal controlling switch connection, i.e. power supply is described radio frequency signal amplifiers
Power supply, radio frequency signal amplifiers normally works.
Therefore, a kind of optical module radiofrequency signal output control circuit in this programme, except including aforementioned inspection
Survey outside the optical module that precision is high, also include switch and the power supply powered to this radio frequency ejecting end RFout,
Utilize or the low and high level of outfan of door, drive connecing of the switch that the outfan with this or door electrically connects
On-off open state, recycles described switch to control the break-make of power supply；Thus at radio frequency signal amplifiers
Outfan RFout without normally exporting time, or door output low level drives and switches off, thus controls electricity
Source is broken as radio frequency signal amplifiers and powers, and reduces the power consumption of whole system.
Further, refer to accompanying drawing 4, present invention also offers a kind of optical module radiofrequency signal output control
Method processed, it includes step:
S10, utilizes the output state of the radio frequency signal amplifiers of the grid electrically connecting described field effect transistor,
Drive the on or off of this field effect transistor；
S11, utilize or the drain electrode sampling voltage of this field effect transistor and earth signal are asked by door or, trigger
Or the outfan of door exports corresponding low and high level；
S12, utilizes or the low and high level of outfan of door, drives the outfan with this or door to electrically connect
Switch be switched on or switched off state；
S13, utilizes described switch to control the break-make of the power supply powered for described radio frequency signal amplifiers.
Concrete, when the outfan RFout of radio frequency signal amplifiers does not has signal to export, field effect transistor
Q1 ends, and its drain electrode does not has electric current, and the i.e. second divider resistance R3 two ends do not have voltage difference, then be somebody's turn to do or door
The level of an input A be low, and or the other end B ground signalling of door, then should or the outfan of door
The output level of C is also low, switches off described in low level triggering, i.e. power supply is broken as described radio frequency letter
Number amplifier is powered, and saves the power consumption of whole system；Otherwise, when the outfan of radio frequency signal amplifiers
When RFout has signal to export, field effect transistor Q1 turns on, and its drain electrode has electric current to flow through, and the second dividing potential drop electricity
There is voltage difference in resistance R3 two ends, then should or the level of an input A of door be height, with or another of door
End B earth signal phase or after, should or door outfan C export high level, this high level trigger described in open
Closing and connect, power supply is that described radio frequency signal amplifiers is powered, i.e. the present invention program can utilize radiofrequency signal to put
The output state of the outfan RFout of big device, drives switch to control as radiofrequency signal in described optical module
The break-make of the power supply that amplifier is powered.
In description mentioned herein, although illustrate substantial amounts of detail.But, it is possible to reason
Solving, embodiments of the invention can be put into practice in the case of not having these details.In some embodiments
In, it is not shown specifically known method, structure and technology, in order to do not obscure the understanding of this description.
Although have been illustrated with some exemplary embodiments of the present invention above, but those skilled in the art
Member, can be to these exemplary enforcement it will be appreciated that in the case of without departing from the principle of the present invention or spirit
Example makes a change, and the scope of the present invention is limited by claim and equivalent thereof.
Claims (10)
1. an optical module, it is characterised in that: include radio frequency signal amplifiers, field effect transistor or door
And divider resistance；
Described field effect transistor, its grid electrical connection outfan of described radio frequency signal amplifiers, source electrode are electrically connected
Connect voltage positive input terminal, drain electrode is electrically connected with divider resistance, defeated for by described radio frequency signal amplifiers
Do well its on or off of driving；
Described or door, one input end ground connection, another input connect one end of described divider resistance, use
In the level height utilizing its outfan to export, detect whether described radio frequency signal amplifiers has signal to export.
Optical module the most according to claim 1, it is characterised in that: also include photodetector, institute
State photodetector and electrically connect the input of described radio frequency signal amplifiers.
Optical module the most according to claim 2, it is characterised in that: described photodetector is PIN
Photodiode or avalanche photodide.
Optical module the most according to claim 1, it is characterised in that: described divider resistance is mutually to go here and there
First divider resistance of connection and the second divider resistance, another input of wherein said or door connects described the
One divider resistance and the public connecting end of the second divider resistance.
Optical module the most according to claim 1, it is characterised in that: described field effect transistor is PMOS
Pipe.
Optical module the most according to claim 1, it is characterised in that: when described or door outfan is defeated
When going out high level, characterizing described radio frequency signal amplifiers has signal to export；Otherwise, or the outfan of door is defeated
When going out low level, characterize the output of described radio frequency signal amplifiers no signal.
Optical module the most according to claim 1, it is characterised in that: also include indicating member, institute
Stating described in indicating member electrical connection or the outfan of door, the level state for basis or the outfan of door is sent out
Go out indication signal.
Optical module the most according to claim 7, it is characterised in that: described indicating member is display lamp
And/or speaker.
9. an optical module radiofrequency signal output control circuit, it is characterised in that: include just like claim
Arbitrary described optical module and the switch being electrically connected to each other and power supply in 1 to 8；
Described switch, electrical connection is described or the outfan of door, by the varying level of the outfan of described or door
Control it and be switched on or switched off state；
Described power supply, for powering for described radio frequency signal amplifiers, by its break-make of described on-off control.
Circuit the most according to claim 9, it is characterised in that: also include and described switch electricity
The controller connected,
Described controller, electrically connects described divider resistance, for detecting the conducting of described field effect transistor and cutting
Only state, is switched on or switched off state with control described switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610305359.9A CN105978622B (en) | 2016-05-09 | 2016-05-09 | Optical module and its radiofrequency signal output control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610305359.9A CN105978622B (en) | 2016-05-09 | 2016-05-09 | Optical module and its radiofrequency signal output control circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105978622A true CN105978622A (en) | 2016-09-28 |
| CN105978622B CN105978622B (en) | 2019-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610305359.9A Active CN105978622B (en) | 2016-05-09 | 2016-05-09 | Optical module and its radiofrequency signal output control circuit |
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| CN (1) | CN105978622B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4548669B2 (en) * | 2005-11-07 | 2010-09-22 | 日本電信電話株式会社 | Optical burst cell signal receiving circuit |
| CN102761372A (en) * | 2012-07-30 | 2012-10-31 | 青岛海信宽带多媒体技术有限公司 | Optical module and light-emitting indication signal output circuit thereof |
| CN203590233U (en) * | 2013-12-04 | 2014-05-07 | 青岛海信宽带多媒体技术有限公司 | Optical module |
-
2016
- 2016-05-09 CN CN201610305359.9A patent/CN105978622B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4548669B2 (en) * | 2005-11-07 | 2010-09-22 | 日本電信電話株式会社 | Optical burst cell signal receiving circuit |
| CN102761372A (en) * | 2012-07-30 | 2012-10-31 | 青岛海信宽带多媒体技术有限公司 | Optical module and light-emitting indication signal output circuit thereof |
| CN102761372B (en) * | 2012-07-30 | 2015-10-21 | 青岛海信宽带多媒体技术有限公司 | Optical module and light emission instruction signal output circuit thereof |
| CN203590233U (en) * | 2013-12-04 | 2014-05-07 | 青岛海信宽带多媒体技术有限公司 | Optical module |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105978622B (en) | 2019-04-16 |
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