CN204517820U - Low power optical receiving enter house type optical receiver - Google Patents
Low power optical receiving enter house type optical receiver Download PDFInfo
- Publication number
- CN204517820U CN204517820U CN201520171336.4U CN201520171336U CN204517820U CN 204517820 U CN204517820 U CN 204517820U CN 201520171336 U CN201520171336 U CN 201520171336U CN 204517820 U CN204517820 U CN 204517820U
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- China
- Prior art keywords
- circuit
- output
- amplifying circuit
- house type
- gain adjusting
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- Expired - Fee Related
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- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Optical Communication System (AREA)
Abstract
What the utility model discloses a kind of low power optical receiving enters house type optical receiver, comprise photoelectric switching circuit, described photoelectric switching circuit respectively with input and the sampling of the first amplifying circuit, the input electrical connection of amplifying circuit, the output of described first amplifying circuit and the rf inputs of gain adjusting circuit are electrically connected, the radio-frequency (RF) output end of described gain adjusting circuit and the input of the second amplifying circuit are electrically connected, output and the signal output apparatus of described second amplifying circuit are electrically connected, described sampling, the output of amplifying circuit is electrically connected with the sampled voltage control end in gain adjusting circuit and luminous power display circuit respectively.The beneficial effects of the utility model, when being+2dBm to-16dBm into house type optical receiver input optical power, can normally work, practical.
Description
Technical field
The utility model relates to a kind of improvement of cable television network optical receiver, particularly a kind of low power optical receiving enter house type optical receiver.
Background technology
The design entering house type optical receiver of current use develops owing to adopting the design of conventional optical receivers, and it is higher that it designs input power, causes optical link power reduction after fiber to the home and optical receiver cannot work, affects the normal use of user.
Utility model content
The purpose of this utility model is to solve the problem, and what devise a kind of low power optical receiving enters house type optical receiver.
Realizing above-mentioned purpose the technical solution of the utility model is, low power optical receiving enter house type optical receiver, comprise photoelectric switching circuit, described photoelectric switching circuit respectively with input and the sampling of the first amplifying circuit, the input electrical connection of amplifying circuit, the output of described first amplifying circuit and the rf inputs of gain adjusting circuit are electrically connected, the radio-frequency (RF) output end of described gain adjusting circuit and the input of the second amplifying circuit are electrically connected, output and the signal output apparatus of described second amplifying circuit are electrically connected, described sampling, the output of amplifying circuit is electrically connected with the sampled voltage control end in gain adjusting circuit and luminous power display circuit respectively.
Described photoelectric switching circuit is made up of photo-detector D5, inductance L 9, L10, B1, electric capacity C1, C11.
Described first amplifying circuit is made up of the peripheral circuit of low noise integrated gallium arsenide amplifier U1 and U1.
Described gain adjusting circuit is made up of the peripheral circuit of PIN diode D1, D2 and D1, D2, and wherein D1, D2 can be made up of PIN diode, also can be made up of the integrated circuit of integrated PIN diode function; The sampled voltage control end of wherein said gain adjusting circuit forms ten sections of sampling control signal circuit by diode D8, D9, D10, D11, D12, D13, D14, D15, D16, D17 and resistance R24, R25, R26, R28, R29, R30, R31, R32, R33, R34.
Described second amplifying circuit is made up of the peripheral circuit of low noise integrated gallium arsenide amplifier U2 and U2.
Described signal output apparatus is that the house type optical receiver radiofrequency signal that enters of low power optical receiving exports the connecting circuit with external cable, for single channel output, two distribution outputs, a branch export three kinds and export type of attachment.
Described sampling, amplifying circuit are made up of the peripheral circuit of resistance R12, R13, R14, electric capacity C13, C14, operational amplifier IC2, IC3, IC4 and IC2, IC3, IC4.
Described luminous power display circuit is for the height of input optical power provides display.
Described power circuit is for complete machine provides DC power supply.
The beneficial effects of the utility model, when being+2dBm to-16dBm into house type optical receiver input optical power, can normally work, practical.
Accompanying drawing explanation
Fig. 1 is the structural representation entering house type optical receiver of low power optical receiving described in the utility model;
Fig. 2 is the circuit theory diagrams entering house type optical receiver of low power optical receiving described in the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is specifically described, as the structural representation entering house type optical receiver that Fig. 1 is low power optical receiving described in the utility model, Fig. 2 is the circuit theory diagrams entering house type optical receiver of low power optical receiving described in the utility model, low power optical receiving enter house type optical receiver, light signal is via the radiofrequency signal changing greater efficiency after photo-detector D5 into, again via L9, C1, the impedance matching circuit of B1 composition, photo-detector equivalent output impedance coupling is become the normal impedance of 75 Ohm radio frequency signals, carry out signal by the first amplifying circuit again and amplify process, then gain adjusting circuit rf inputs is electrically connected to, in gain adjusting circuit, the attenuation constant of PIN diode is controlled by the sampled voltage of ten sections of sampling control signal circuit, radio-frequency input signals in continuous 10dBm when making input optical power be+2dBm to-16dBm controls the height of its attenuation value according to the height of sampled voltage, the radio frequency output signal maintenance through PIN diode is made to stablize constant, radio frequency output signal beyond above-mentioned continuous 10dBm during luminous power input does not control by gain adjusting circuit, gain adjusting circuit radio-frequency (RF) output end is electrically connected the second amplifying circuit, second amplifying circuit again radio frequency signal is connected to external delivery outlet by signal output apparatus after carrying out amplification process, and signal output apparatus is that single channel exports, two distribution export, a branch exports three kinds and exports types of attachment.
Described first amplifying circuit forms first order low noise amplifier by the peripheral circuit of low noise integrated gallium arsenide amplifier U1 and U1, described second amplifying circuit forms second level low noise amplifier by the peripheral circuit of low noise integrated gallium arsenide amplifier U2 and U2, when input optical power is+2dBm to-16dBm, realize exporting higher signal gain, reach the object of low power optical receiving.
Technique scheme only embodies the optimal technical scheme of technical solutions of the utility model; those skilled in the art all embody principle of the present utility model to some variations that wherein some part may be made, and belong within protection range of the present utility model.
Claims (4)
1. low power optical receiving enter house type optical receiver, comprise photoelectric switching circuit, it is characterized in that, described photoelectric switching circuit respectively with input and the sampling of the first amplifying circuit, the input electrical connection of amplifying circuit, the output of described first amplifying circuit and the rf inputs of gain adjusting circuit are electrically connected, the radio-frequency (RF) output end of described gain adjusting circuit and the input of the second amplifying circuit are electrically connected, output and the signal output apparatus of described second amplifying circuit are electrically connected, described sampling, the output of amplifying circuit is electrically connected with the sampled voltage control end in gain adjusting circuit and luminous power display circuit respectively.
2. low power optical receiving according to claim 1 enter house type optical receiver, it is characterized in that described photoelectric switching circuit is made up of photo-detector D5, inductance L 9, L10, B1, electric capacity C1, C11; Described first amplifying circuit is made up of the peripheral circuit of low noise integrated gallium arsenide amplifier U1 and U1; Described second amplifying circuit is made up of the peripheral circuit of low noise integrated gallium arsenide amplifier U2 and U2.
3. low power optical receiving according to claim 1 enter house type optical receiver, it is characterized in that described gain adjusting circuit is made up of the peripheral circuit of PIN diode D1, D2 and D1, D2, wherein D1, D2 can be made up of PIN diode, also can be made up of the integrated circuit of integrated PIN diode function, the sampled voltage control end of wherein said gain adjusting circuit is by diode D8, D9, D10, D11, D12, D13, D14, D15, D16, D17 and resistance R24, R25, R26, R28, R29, R30, R31, R32, R33, R34 forms ten sections of sampling control signal circuit, the attenuation constant of PIN diode is controlled by the sampled voltage of ten sections of sampling control signal circuit, radio-frequency input signals in continuous 10dBm when making input optical power be+2dBm to-16dBm controls the height of its attenuation value according to the height of sampled voltage, the radio frequency output signal maintenance through PIN diode is made to stablize constant, radio frequency output signal beyond above-mentioned continuous 10dBm during luminous power input does not control by gain adjusting circuit.
4. low power optical receiving according to claim 1 enter house type optical receiver, it is characterized in that described signal output apparatus is the connecting circuit entering the output of house type optical receiver radiofrequency signal and external cable of low power optical receiving, for single channel output, two distribution outputs, a branch export three kinds of output types of attachment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520171336.4U CN204517820U (en) | 2015-03-26 | 2015-03-26 | Low power optical receiving enter house type optical receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520171336.4U CN204517820U (en) | 2015-03-26 | 2015-03-26 | Low power optical receiving enter house type optical receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204517820U true CN204517820U (en) | 2015-07-29 |
Family
ID=53715747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520171336.4U Expired - Fee Related CN204517820U (en) | 2015-03-26 | 2015-03-26 | Low power optical receiving enter house type optical receiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204517820U (en) |
-
2015
- 2015-03-26 CN CN201520171336.4U patent/CN204517820U/en not_active Expired - Fee Related
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150729 Termination date: 20180326 |