CN202931330U - Cable television optical receiver - Google Patents
Cable television optical receiver Download PDFInfo
- Publication number
- CN202931330U CN202931330U CN 201220701479 CN201220701479U CN202931330U CN 202931330 U CN202931330 U CN 202931330U CN 201220701479 CN201220701479 CN 201220701479 CN 201220701479 U CN201220701479 U CN 201220701479U CN 202931330 U CN202931330 U CN 202931330U
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- attenuator
- equalizer
- amplifier
- cable television
- light emission
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Abstract
The utility model relates to a cable television optical receiver which is characterized in that the cable television optical receiver comprises a single chip microcomputer control unit and comprises a photoelectric converter, a first stage amplifier, an automatic gain control circuit, a second stage amplifier, a first equalizer, a first attenuator, a third stage amplifier, a fourth stage amplifier, a first high and low pass filter, a second attenuator, a second high and low pass filter, a fifth amplifier, a third attenuator, a second equalizer and a reverse return light emission component which are connected in order. The single chip microcomputer control unit controls the photoelectric converter, the automatic gain control circuit, the first equalizer and the first attenuator. The single chip microcomputer is also connected with a display unit and a data communication interface circuit. A feedback terminal of the reverse return light emission component is connected with the single chip microcomputer control unit.
Description
Technical field
The utility model relates to the optical receiver technical field, particularly a kind of cable television photo-receiver.
Background technology
In existing optical-fiber network transmission, require optical receiver at input optical power to be-dynamic range of 7dBm-1dBm, the output signal level variation of optical receiver is not more than 2dB, therefore require optical receiver to have enough wide gain control range, distortion is large and carrier-to-noise ratio is poor yet existing optical receiver signal is processed.In addition, optical receiver does not possess the feedback self-regulating function.
The utility model content
In view of this, the purpose of this utility model is to provide a kind of cable television photo-receiver, and having signal, to process distortion little and possess the feedback self-regulating function.
The utility model adopts following scheme to realize: a kind of cable television photo-receiver is characterized in that: comprise Single-chip Controlling unit and the optical-electrical converter, first order amplifier, automatic gain control circuit, second level amplifier, the first equalizer, the first attenuator, third level amplifier, fourth stage amplifier, the first high-pass and low-pass filter, the second attenuator, the second high-pass and low-pass filter, the 5th amplifier, the 3rd attenuator, the second equalizer that connect successively and oppositely return light emission component; The described optical-electrical converter of described Single-chip Controlling unit controls, automatic gain control circuit, the first equalizer and the first attenuator; Described single-chip microcomputer also is connected with display unit and transfer of data communication interface circuit; The feedback end of described reverse passback light emission component is connected with described Single-chip Controlling unit.
In the utility model one embodiment, described display unit is a charactron display module.
In the utility model one embodiment, also comprise a Switching Power Supply, this Switching Power Supply is this receiver power supply.
The utility model link structure is simple, and feeds back Intelligent Single-Chip Based by output and control, and can realize Gain Automatic adjusting, has guaranteed greatly Systems balanth, has practical value preferably.
Description of drawings
Fig. 1 is the utility model system principle diagram.
Fig. 2 is the utility model one embodiment circuit connection diagram.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described further.
As shown in Figure 1, the present embodiment provides a kind of cable television photo-receiver, it is characterized in that: comprise Single-chip Controlling unit and the optical-electrical converter, first order amplifier, automatic gain control circuit, second level amplifier, the first equalizer, the first attenuator, third level amplifier, fourth stage amplifier, the first high-pass and low-pass filter, the second attenuator, the second high-pass and low-pass filter, the 5th amplifier, the 3rd attenuator, the second equalizer that connect successively and oppositely return light emission component; The described optical-electrical converter of described Single-chip Controlling unit controls, automatic gain control circuit, the first equalizer and the first attenuator; Described single-chip microcomputer also is connected with display unit and transfer of data communication interface circuit; The feedback end of described reverse passback light emission component is connected with described Single-chip Controlling unit.
Concrete, seeing also Fig. 2, in figure, described display unit is a charactron display module.This system also comprises a Switching Power Supply, and this Switching Power Supply is this receiver power supply.It is system power supply that this Switching Power Supply provides 8V and 24V two-way.light signal is input to optical-electrical converter, then successively through first order amplifier, automatic gain control circuit AGC, second level amplifier, the first equalizer EQ, the first attenuator ATT, third level amplifier, fourth stage amplifier, the first high-pass and low-pass filter, the second attenuator ATT1, the second high-pass and low-pass filter, the 5th amplifier, the 3rd attenuator ATT2, the second equalizer EQ and oppositely return light emission component, oppositely the state of passback light emission component feedback loop output signal is to described Single-chip Controlling unit, Single-chip Controlling unit and then control described optical-electrical converter, automatic gain control circuit, the first equalizer and the first attenuator work, to guarantee Systems balanth.
It is worth mentioning that, Single-chip Controlling described in the utility model unit also is connected with the transfer of data communication interface circuit, in order to the upgrading of system and with the transfer of data in the external world.
The above is only preferred embodiment of the present utility model, and all equalizations of doing according to the utility model claim change and modify, and all should belong to covering scope of the present utility model.
Claims (3)
1. a cable television photo-receiver, is characterized in that: comprise Single-chip Controlling unit and the optical-electrical converter, first order amplifier, automatic gain control circuit, second level amplifier, the first equalizer, the first attenuator, third level amplifier, fourth stage amplifier, the first high-pass and low-pass filter, the second attenuator, the second high-pass and low-pass filter, the 5th amplifier, the 3rd attenuator, the second equalizer that connect successively and oppositely return light emission component; The described optical-electrical converter of described Single-chip Controlling unit controls, automatic gain control circuit, the first equalizer and the first attenuator; Described single-chip microcomputer also is connected with display unit and transfer of data communication interface circuit; The feedback end of described reverse passback light emission component is connected with described Single-chip Controlling unit.
2. a kind of cable television photo-receiver according to claim 1, it is characterized in that: described display unit is a charactron display module.
3. a kind of cable television photo-receiver according to claim 1 is characterized in that: also comprise a Switching Power Supply, this Switching Power Supply is this receiver power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220701479 CN202931330U (en) | 2012-12-18 | 2012-12-18 | Cable television optical receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220701479 CN202931330U (en) | 2012-12-18 | 2012-12-18 | Cable television optical receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202931330U true CN202931330U (en) | 2013-05-08 |
Family
ID=48221238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220701479 Expired - Fee Related CN202931330U (en) | 2012-12-18 | 2012-12-18 | Cable television optical receiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202931330U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105245287A (en) * | 2015-09-24 | 2016-01-13 | 江苏阿尔特光电科技有限公司 | Indoor type optical receiver |
-
2012
- 2012-12-18 CN CN 201220701479 patent/CN202931330U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105245287A (en) * | 2015-09-24 | 2016-01-13 | 江苏阿尔特光电科技有限公司 | Indoor type optical receiver |
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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: 20130508 Termination date: 20151218 |
|
| EXPY | Termination of patent right or utility model |