CN202772900U - Output level control circuit for digital optical receiver - Google Patents
Output level control circuit for digital optical receiver Download PDFInfo
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- CN202772900U CN202772900U CN 201220240698 CN201220240698U CN202772900U CN 202772900 U CN202772900 U CN 202772900U CN 201220240698 CN201220240698 CN 201220240698 CN 201220240698 U CN201220240698 U CN 201220240698U CN 202772900 U CN202772900 U CN 202772900U
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Abstract
The utility model is applicable to the technical field of optical fiber communication, and provides an output level control circuit for a digital optical receiver. In the utility model, the output level control circuit comprises an optical detector, a preamplifier, a main amplifier, a digital attenuator, a decision device, a set signal input device and a microprocessor, thus, in the case of only using one digital attenuator, the attenuation amount of the electric signal is adjusted according to the optical power or the attenuation amount set by the user, so as to realize the automatic gain control or output level adjustment, and reduce the power consumption and cost, so as to solve the problems of the prior art such as large power consumption and high cost.
Description
Technical field
The utility model belongs to fiber optic communication field, relates in particular to a kind of output level control circuit of digital optical receiver.
Background technology
In HFC (Hybrid Fiber-Coaxial) transmission network, the problem of amplitude fading and impulse waveform broadening can appear in the light signal that optical sender sends after the process transmission, and then luminous power is changed, and the optical receiver that is in network end-point is after receiving the light signal that power changes, its output level also can change thereupon, therefore, need to gain control to the output level of optical receiver to guarantee that it does not change with the variation of luminous power, and under certain specific debugging enironment, can also be according to user's needs regulation output level.
In the prior art, wherein a kind of scheme is to realize respectively automatic gain control function and output level regulatory function by two processors.Although both can realize like this control that gains of output level to optical receiver, can regulate output level according to user's actual demand again, strengthen the power consumption of whole optical receiver and increased the cost of optical receiver.Therefore, there is the problem that power consumption is large and cost is high in prior art.
The utility model content
The utility model provides a kind of output level control circuit of digital optical receiver, is intended to solve the problem that the existing power consumption of prior art is large and cost is high.
The utility model is achieved in that a kind of output level control circuit of digital optical receiver, and described output level control circuit comprises:
The input receiving optical signals, and described light signal is converted to the photodetector of the signal of telecommunication;
The output of the described photodetector of input termination, the preamplifier that the signal of telecommunication that described photodetector is exported amplifies;
The output of the described preamplifier of input termination is to the digital pad of control to realize gain control or the output level of digital optical receiver are regulated of decaying through the signal of telecommunication of described preamplifier amplification;
Input the output of the described digital pad of termination, amplify the main amplifier of the signal of telecommunication of described digital pad output;
The output of input termination described main amplifier carries out binary code to the signal of telecommunication of described main amplifier output and adjudicates to obtain digital electric signal, and exports the decision device of described digital electric signal from output;
Signalization loader according to user's operation output light wavelength signalization or attenuation signalization;
The output of the described signalization loader of termination is set, the test side of the described photodetector of voltage acquisition termination, the controlled end of the described digital pad of control signal output termination, the signal of telecommunication that described photodetector is generated carries out voltage detecting, and regulates the microprocessor of the decay span of control limit of control of described digital pad according to described optical wavelength signalization or attenuation signalization.
Another purpose of the present utility model also is to provide a kind of digital optical receiver that comprises described output level control circuit.
In the utility model, the output level control circuit that comprises the digital optical receiver of described photodetector, described preamplifier, described digital pad, described main amplifier, described decision device, described signalization loader and described microprocessor by employing, the luminous power that can set according to the user in the situation of only using a digital pad or attenuation adjustment are regulated to realize automatic gain control or output level the attenuation of the signal of telecommunication, reduce power consumption and cost, thereby solved the problem that the existing power consumption of prior art is large and cost is high.
Description of drawings
Fig. 1 is the modular structure figure of the output level control circuit of the digital optical receiver that provides of the utility model embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
In the utility model embodiment, comprise the output level control circuit of the digital optical receiver of photodetector, preamplifier, digital pad, main amplifier, decision device, signalization loader and microprocessor by employing, the luminous power that can set according to the user in the situation of only using a digital pad or attenuation adjustment are regulated to realize automatic gain control or output level the attenuation of the signal of telecommunication.
Fig. 1 shows the modular structure of the output level control circuit of the digital optical receiver that the utility model embodiment provides, and for convenience of explanation, only shows the part relevant with the utility model embodiment, and details are as follows:
The output level control circuit of digital optical receiver comprises:
The input receiving optical signals, and this light signal is converted to the photodetector 100 of the signal of telecommunication;
The output of input termination photodetector 100, the preamplifier 200 that the signal of telecommunication that photodetector 100 is exported amplifies;
The output of input termination preamplifier 200 is to the digital pad 300 of control to realize gain control or the output level of digital optical receiver are regulated of decaying through the signal of telecommunication of preamplifier 200 amplifications;
The output of input termination digital pad 300, the main amplifier 400 of the signal of telecommunication of amplifier digital attenuator 300 outputs;
The output of input termination main amplifier 400 carries out binary code to the signal of telecommunication of main amplifier 400 outputs and adjudicates to obtain digital electric signal, and exports the decision device 500 of this digital electric signal from output;
The output of termination signalization loader 600 is set, the test side of voltage acquisition termination photodetector 100, the controlled end of control signal output termination digital pad 300, the signal of telecommunication that photodetector 100 is generated carries out voltage detecting, and regulates the microprocessor 700 of the decay span of control limit of control of digital pad 300 according to optical wavelength signalization or the attenuation signalization of 600 outputs of signalization loader.
The output level control circuit of digital optical receiver also comprises:
Input and output connect respectively the output of main amplifier 400 and the input of decision device 500, and the signal of telecommunication that main amplifier 500 is exported carries out the equalization filter 800 that equalization filtering is processed;
The input end of clock of output termination decision device 500, the clock signal that comprises in the signal of telecommunication that decision device 500 is received extracts, and the clock recovery electronic circuit 900 of judgement clock signal is provided for decision device 500;
The data output end of input termination microprocessor 700 shows the luminous power data corresponding with optical wavelength signalizations 600 outputs of signalization loader or attenuation signalization microprocessor 700 inner generations or the display 1000 of attenuation data.
Be described further below in conjunction with the output level control circuit of operation principle to digital optical receiver:
In addition, needs according to current environment for use, the user can control the output level of optical receiver, specifically can be by signalization loader 600 output attenuatoin amount signalizations to microprocessor 700, then generate corresponding attenuation by microprocessor 700, and after the attenuation data that generate during with this attenuation and above-mentioned realization gain control superpose, export the signal of telecommunication that corresponding attenuation control signal is exported to regulate preamplifier 200 to digital pad 300, then this signal of telecommunication amplifies by main amplifier 400, and carry out equalization filtering through equalization filter 800 and process, undertaken obtaining digital electric signal after the binary code judgement by decision device 500 at last, because the signal of telecommunication that preamplifier 200 is exported is regulated by digital pad 300 first, therefore the level of the digital electric signal exported of decision device 500 is also thereupon adjusted, and then realization realizes that to digital optical receiver gain is controlled and the purpose of output level adjusting thereby reach to the adjusting of digital output level of light receiver.
Further, photodetector 100 can be PIN photodiode or avalanche photodide, and according to different practical application request, the user can select one to both and select.
Further, signalization loader 600 can be the input units such as keyboard or touch-screen, and the user can be selected both according to the actual user demand of oneself.
Further, microprocessor 700 can be single-chip microcomputer or arm processor, and according to different data processing demands, the user can select single-chip microcomputer to carry out simple data processing, perhaps selects arm processor to realize more loaded down with trivial details data operation processing.
Further, display 1000 can be charactron display module, light-emitting diode display, LCD display or CRT monitor, and the user can show that demand is selected aforementioned four according to data equally.
The utility model embodiment also provides a kind of digital receiver that comprises above-mentioned output level control circuit.
In the utility model embodiment, the output level control circuit that comprises the digital optical receiver of photodetector, preamplifier, digital pad, main amplifier, decision device, signalization loader and microprocessor by employing, the luminous power that can set according to the user in the situation of only using a digital pad or attenuation adjustment are regulated to realize automatic gain control or output level the attenuation of the signal of telecommunication, reduce power consumption and cost, thereby solved the problem that the existing power consumption of prior art is large and cost is high.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (6)
1. the output level control circuit of a digital optical receiver is characterized in that, described output level control circuit comprises:
The input receiving optical signals, and described light signal is converted to the photodetector of the signal of telecommunication;
The output of the described photodetector of input termination, the preamplifier that the signal of telecommunication that described photodetector is exported amplifies;
The output of the described preamplifier of input termination is to the digital pad of control to realize gain control or the output level of digital optical receiver are regulated of decaying through the signal of telecommunication of described preamplifier amplification;
Input the output of the described digital pad of termination, amplify the main amplifier of the signal of telecommunication of described digital pad output;
The output of input termination described main amplifier carries out binary code to the signal of telecommunication of described main amplifier output and adjudicates to obtain digital electric signal, and exports the decision device of described digital electric signal from output;
Signalization loader according to user's operation output light wavelength signalization or attenuation signalization;
The output of the described signalization loader of termination is set, the test side of the described photodetector of voltage acquisition termination, the controlled end of the described digital pad of control signal output termination, the signal of telecommunication that described photodetector is generated carries out voltage detecting, and regulates the microprocessor of the decay span of control limit of control of described digital pad according to described optical wavelength signalization or attenuation signalization.
2. output level control circuit as claimed in claim 1 is characterized in that, described output level control circuit also comprises:
Input and output connect respectively the output of described main amplifier and the input of described decision device, and the signal of telecommunication that described main amplifier is exported carries out the equalization filter that equalization filtering is processed;
The input end of clock of output termination described decision device, the clock signal that comprises in the signal of telecommunication that described decision device is received extracts, and the clock recovery electronic circuit of judgement clock signal is provided for described decision device;
The data output end of the described microprocessor of input termination shows the luminous power data corresponding with described optical wavelength signalization or attenuation signalization of described microprocessor internal generation or the display of attenuation data.
3. output level control circuit as claimed in claim 1 is characterized in that, described photodetector is PIN photodiode or avalanche photodide.
4. output level control circuit as claimed in claim 1 is characterized in that, described signalization loader is keyboard or touch-screen.
5. output level control circuit as claimed in claim 1 is characterized in that, described microprocessor is single-chip microcomputer or arm processor.
6. output level control circuit as claimed in claim 2 is characterized in that, described display is charactron display module, light-emitting diode display, LCD display or CRT monitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220240698 CN202772900U (en) | 2012-05-25 | 2012-05-25 | Output level control circuit for digital optical receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220240698 CN202772900U (en) | 2012-05-25 | 2012-05-25 | Output level control circuit for digital optical receiver |
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| Publication Number | Publication Date |
|---|---|
| CN202772900U true CN202772900U (en) | 2013-03-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220240698 Expired - Fee Related CN202772900U (en) | 2012-05-25 | 2012-05-25 | Output level control circuit for digital optical receiver |
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| CN (1) | CN202772900U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104506244A (en) * | 2014-12-25 | 2015-04-08 | 四川璧虹广播电视新技术有限公司 | AGC (automatic gain control) control circuit for management type household optical receiving machine |
| CN104811249A (en) * | 2014-01-24 | 2015-07-29 | 上海新纳通信技术有限公司 | Low-loss network type optical receiver and control method |
| CN105306147A (en) * | 2015-10-30 | 2016-02-03 | 苏州优康通信设备有限公司 | Digital optical receiver |
-
2012
- 2012-05-25 CN CN 201220240698 patent/CN202772900U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104811249A (en) * | 2014-01-24 | 2015-07-29 | 上海新纳通信技术有限公司 | Low-loss network type optical receiver and control method |
| CN104506244A (en) * | 2014-12-25 | 2015-04-08 | 四川璧虹广播电视新技术有限公司 | AGC (automatic gain control) control circuit for management type household optical receiving machine |
| CN104506244B (en) * | 2014-12-25 | 2018-04-03 | 四川璧虹广播电视新技术有限公司 | A kind of AGC control circuits of management type family expenses photoreceiver |
| CN105306147A (en) * | 2015-10-30 | 2016-02-03 | 苏州优康通信设备有限公司 | Digital optical receiver |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130306 Termination date: 20140525 |