CN203800945U - Optical receiver with radio frequency automatic gain control circuit - Google Patents
Optical receiver with radio frequency automatic gain control circuit Download PDFInfo
- Publication number
- CN203800945U CN203800945U CN201420153134.2U CN201420153134U CN203800945U CN 203800945 U CN203800945 U CN 203800945U CN 201420153134 U CN201420153134 U CN 201420153134U CN 203800945 U CN203800945 U CN 203800945U
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- optical receiver
- control circuit
- gain control
- automatic gain
- signal
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Abstract
The utility model relates to an optical receiver, in particular, an optical receiver with a radio frequency automatic gain control circuit. The optical receiver includes an automatic gain control circuit, an radio frequency signal amplifying circuit and a photoelectric conversion circuit which are arranged in the optical receiver and are located on a circuit board; after being processed by the photoelectric conversion circuit, the radio frequency signal amplifying circuit and the automatic gain control circuit, optical signals are converted into electric signals, and the electric signals are outputted; and the automatic gain control circuit comprises a first gain unit, a second gain unit, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor and a fifth capacitor, wherein the first gain unit and the second gain unit are in parallel connection, and the fifth capacitor is connected with an output end. According to the optical receiver with the radio frequency automatic gain control circuit of the utility model, the optical receiver is provided with the automatic gain control circuit; total output level can be automatically adjusted and can be maintained constant through increasing level gain quantity or reducing level attenuation quantity, and therefore, the problem of inconstancy of the output level of the optical receiver can be effectively solved.
Description
Technical field
The utility model relates to a kind of optical receiver, relates in particular to a kind of optical receiver with radio frequency automatic gain control circuit.
Background technology
At present, optical fiber communication is widely applied in broadcast, TV, network, transportation and other fields.In Fiber-optic Communication Projects implementation process, mostly adopt optical receiver realize photosignal conversion and process.Existing optical receiver is generally without automatic gain control function, in optical receiver running, along with the large minor swing of input optical signal, the radio frequency level of output is also along with variation, the radio frequency level signal that causes being transferred to user is very unstable, affects user's normal use.
Summary of the invention
The utility model generally can not keep without automatic gain control function the shortcoming that total output level is constant for optical receiver in prior art, provides a kind of by increasing electric-level gain amount or reducing the optical receiver with radio frequency automatic gain control circuit of level attenuation automatically to regulate total output level and total output level is remained unchanged.
In order to solve the problems of the technologies described above, the utility model is solved by following technical proposals:
A kind of optical receiver with radio frequency automatic gain control circuit, be included in the automatic gain control circuit that the circuit board in optical receiver is provided with, the rf signal amplification circuit being connected with automatic gain control circuit and the photoelectric switching circuit being connected with rf signal amplification circuit, in light signal input optical receiver, after photoelectric switching circuit receiving optical signals, convert light signal to the signal of telecommunication and export to rf signal amplification circuit, after rf signal amplification circuit, the signal of telecommunication converts radiofrequency signal to and exports to automatic gain control circuit, automatic gain control circuit is controlled the voltage swing variable quantity of radiofrequency signal, output electrical signals after automatic gain control circuit is processed.After light signal input optical receiver, photoelectric switching circuit and rf signal amplification circuit convert light signal to rf signal, the size variable of input optical signal is directly reacted on the reverse bias voltage of photoelectric switching circuit, by sampling the size variation amount of this voltage, control the height of the channel gain in auto-gain circuit, thereby realize the automatic gain control function to whole optical receiver.
As preferably, automatic gain control circuit comprises the first gain, the second gain, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity and the 5th electric capacity, the first gain and the second gain are for being connected in parallel, and the first gain is connected input with the second gain, and the 5th electric capacity connects output.
As preferably, in optical receiver, be embedded with photoelectric conversion module, photoelectric conversion module comprises photoelectric switching circuit, is provided with light signal input interface and electrical signal output interface on photoelectric conversion module; Light signal is in light signal input interface input optical receiver, and the signal of telecommunication is exported from electrical signal output interface; From the luminous power of the light signal in light signal input interface input optical receiver, be-7～+ 2dB, reference optical power is divided into 10 power sections among a small circle, each among a small circle the maximum power value of power section be 1dB.
The utility model is owing to having adopted above technical scheme, there is significant technique effect: adopt automatic gain control circuit is set on optical receiver, by increasing electric-level gain amount or reducing level attenuation automatically to regulate total output level and total output level is remained unchanged, effectively solved the inconstant problem of output level of light receiver.
Accompanying drawing explanation
Fig. 1 is the structural representation that the utility model circuit board is placed in embodiment in optical receiver.
Fig. 2 is the control circuit functional block diagram of Fig. 1 circuit board.
Fig. 3 is the circuit theory diagrams of ten grades of operation amplifier circuit embodiment of photoelectric conversion module of Fig. 1.
The toponym that in accompanying drawing, each number designation refers to is as follows: wherein 1-optical receiver, 2-circuit board, 3-photoelectric conversion module, 31-light signal input interface, 32-electrical signal output interface, D1-the first gain, D2-the second gain, C33-the first electric capacity, C32-the second electric capacity, C34-three electric capacity, C41-four electric capacity, C17-five electric capacity.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail.
Embodiment 1
A kind of optical receiver with radio frequency automatic gain control circuit, as Figure 1-3, be included in automatic gain control circuit, the rf signal amplification circuit being connected with automatic gain control circuit and the photoelectric switching circuit being connected with rf signal amplification circuit that the circuit board 2 in optical receiver 1 is provided with, in optical receiver 1, be embedded with photoelectric conversion module 3, photoelectric conversion module 3 comprises photoelectric switching circuit, is provided with light signal input interface 31 and electrical signal output interface 32 on photoelectric conversion module 3.
The luminous power of light signal is-7～+ 2dB, and reference optical power is divided into 10 power sections among a small circle, each among a small circle the maximum power value of power section be 1dB.When light signal is in light signal input interface 31 input optical receivers 1, after photoelectric switching circuit receiving optical signals on photoelectric conversion module 3, first convert light signal to the signal of telecommunication, the signal of telecommunication is from electrical signal output interface 32 outputs, after rf signal amplification circuit, convert the electrical signal to again rf signal, then through automatic gain control circuit, control the voltage swing variable quantity of rf signal, the size variable of input optical signal is directly reacted on the reverse bias voltage of photoelectric switching circuit, by sampling the size variation amount of this voltage, control the height of the channel gain in auto-gain circuit, thereby realize the automatic gain control function to whole optical receiver 1.
Embodiment 2
A kind of optical receiver with radio frequency automatic gain control circuit, as Figure 1-3, on the basis of embodiment 1, described automatic gain control circuit comprises the first gain D1, the second gain D2, the first capacitor C 33, the second capacitor C 32, the 3rd capacitor C 34, the 4th capacitor C 41 and the 5th capacitor C 17, the first gain D1 and the second gain D2 are for being connected in parallel, the first gain D1 is connected input with the second gain D2, and the 5th capacitor C 17 connects output.After radiofrequency signal input automatic gain control circuit, the first gain D1, the second gain D2, the first capacitor C 33, the second capacitor C 32, the 3rd capacitor C 34, the 4th capacitor C 41 and 17 pairs of radiofrequency signals of the 5th capacitor C are supplemented gain or are increased attenuation control and process, and make the signal of telecommunication of output remain stable state.
In a word, the foregoing is only preferred embodiment of the present utility model, all equalizations of doing according to the utility model claim change and modify, and all should belong to the covering scope of the utility model patent.
Claims (3)
1. the optical receiver with radio frequency automatic gain control circuit, be included in the automatic gain control circuit that the circuit board (2) in optical receiver (1) is provided with, the rf signal amplification circuit being connected with automatic gain control circuit and the photoelectric switching circuit being connected with rf signal amplification circuit, it is characterized in that: in light signal input optical receiver (1), after photoelectric switching circuit receiving optical signals, convert light signal to the signal of telecommunication and export to rf signal amplification circuit, after rf signal amplification circuit, the signal of telecommunication converts radiofrequency signal to and exports to automatic gain control circuit, automatic gain control circuit is controlled the voltage swing variable quantity of radiofrequency signal, output electrical signals after automatic gain control circuit is processed.
2. a kind of optical receiver with radio frequency automatic gain control circuit according to claim 1, it is characterized in that: automatic gain control circuit comprises the first gain (D1), the second gain (D2), the first electric capacity (C33), the second electric capacity (C32), the 3rd electric capacity (C34), the 4th electric capacity (C41) and the 5th electric capacity (C17), the first gain (D1) and the second gain (D2) are for being connected in parallel, the first gain (D1) is connected input with the second gain (D2), and the 5th electric capacity (C17) connects output.
3. a kind of optical receiver with radio frequency automatic gain control circuit according to claim 1 and 2, it is characterized in that: in optical receiver (1), be embedded with photoelectric conversion module (3), photoelectric conversion module (3) comprises photoelectric switching circuit, is provided with light signal input interface (31) and electrical signal output interface (32) on photoelectric conversion module (3); Light signal is in light signal input interface (31) input optical receiver, and the signal of telecommunication is exported from electrical signal output interface (32); From the luminous power of the light signal in light signal input interface (31) input optical receiver (1), be-7～+ 2dB, reference optical power is divided into 10 power sections among a small circle, each among a small circle the maximum power value of power section be 1dB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420153134.2U CN203800945U (en) | 2014-03-31 | 2014-03-31 | Optical receiver with radio frequency automatic gain control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420153134.2U CN203800945U (en) | 2014-03-31 | 2014-03-31 | Optical receiver with radio frequency automatic gain control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203800945U true CN203800945U (en) | 2014-08-27 |
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ID=51383129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420153134.2U Expired - Fee Related CN203800945U (en) | 2014-03-31 | 2014-03-31 | Optical receiver with radio frequency automatic gain control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203800945U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109474351A (en) * | 2018-12-20 | 2019-03-15 | 四川璧虹广播电视新技术有限公司 | A kind of AGC control method for satellite optical receiver circuit |
-
2014
- 2014-03-31 CN CN201420153134.2U patent/CN203800945U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109474351A (en) * | 2018-12-20 | 2019-03-15 | 四川璧虹广播电视新技术有限公司 | A kind of AGC control method for satellite optical receiver circuit |
| CN109474351B (en) * | 2018-12-20 | 2021-07-20 | 四川璧虹电子信息技术有限公司 | AGC control method for satellite optical receiver circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140827 Termination date: 20190331 |
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| CF01 | Termination of patent right due to non-payment of annual fee |