CN102437882A - Singlechip control equalization circuit for optical receiver of cable television network - Google Patents
Singlechip control equalization circuit for optical receiver of cable television network Download PDFInfo
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- CN102437882A CN102437882A CN2011103286172A CN201110328617A CN102437882A CN 102437882 A CN102437882 A CN 102437882A CN 2011103286172 A CN2011103286172 A CN 2011103286172A CN 201110328617 A CN201110328617 A CN 201110328617A CN 102437882 A CN102437882 A CN 102437882A
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Abstract
The invention discloses a singlechip control equalization circuit for an optical receiver of a cable television network, and belongs to the technical field of cable televisions. The circuit comprises inductors L1 to L3, capacitors C1 to C15, an electrolytic capacitor C16, dual diodes D1 and D2, a light-emitting diode D3, a triode V1, resistors R1 to R14, a signal coupler Z1, chips Q1 and U1, a control unit U2 and sockets JP1 and JP2, wherein the U1 is a PIC16F887-04 singlechip; the U2 is a GSD-008 display control unit; and the Q1 is an MCP1541 voltage reference chip. The circuit has the advantages of simple network structure and less maintenance.
Description
Technical field
The present invention relates to a kind of Single-chip Controlling equalizing circuit that is applied to cable television network optical receiver, belong to the cable TV technical field, especially the transformation of hybrid fiber coax bilateral network is a kind of based on the cable TV optical transmission device
Background technology
to the end of the year 2009, national wired broadcasting TV user reaches 1.74 hundred million families.On January 13rd, 2010, Premier Wen Jiabao's formal proposition in the Executive Meeting of the State Council of holding accelerates to advance China Telecom's net, broadcasting and television network and the Internet integration of three networks, and the clear and definite timetable of the integration of three networks.On June 6th, 2010, China has passed through integration of three networks pilot scheme, and has confirmed 12 experimental cities and area July 1.After the integration of three networks realized, broadcasting and television network not only can provide TV programme, and the Internet and voice communication service can also be provided.For the Internet and communication network, also can develop business such as Web TV, mobile TV better, share the abundant program resource of broadcasting and television network.It is basic transmission network transformation that SARFT(The State Administration of Radio and Television) requires one of HFC bilateral network transformation, and basic realization FTTB is wherein arranged, and realizes that progressively Fiber to the home.Along with the continuous upgrading and the transformation of hfc plant, fiber optic network replaces coaxial cable rapidly with cheap price, wider coverage, transmission speed and littler failure rate faster.Optical sender and optical receiver just become the key equipment in the network in hfc plant like this, and here I just develop the Single-chip Controlling equalizing circuit that a ultralow luminous power receives cable television network optical receiver according to the development of CHINA RFTCOM Co Ltd of new generation
Summary of the invention
the objective of the invention is the Single-chip Controlling equalizing circuit that is used for cable television network optical receiver that a kind of network configuration is simple, maintenance is few will be provided.
the objective of the invention is to reach like this, and a kind of Single-chip Controlling equalizing circuit that is used for cable television network optical receiver comprises inductance L 1-L3, capacitor C 1-C15, electrochemical capacitor C16, double diode D1, D2, light-emitting diode D3, triode V1, resistance R 1-R14, signal coupler Z1, chip Q1, U1, control unit U2 and socket JP1, JP2, and wherein U1 is the PIC16F887-04 singlechip chip; U2 is the GSD-008 indicative control unit, and Q1 is a MCP1541 voltage reference chip, and the 2-5 of chip U1,12,13,19-21,23-27,30,31,33-35,37,42,43 pin are unsettled; 8,9,10,11,14,15 pin of chip U1 connect 2,3,4,9,8,7 pin of control unit U2 respectively, 1 pin of the 16 pin combination hub JP1 of chip U1,2 pin of the 17 pin combination hub JP1 of chip U1; 3 pin of socket JP1 meet direct voltage+5V, the 4 pin ground connection of socket JP1, and 5 pin of socket JP1 connect an end of 18 pin of chip U1, resistance R 10; One end of the other end of resistance R 10, capacitor C 15, the Vin pin of chip Q1 meet direct voltage+5V, the Vss pin of chip Q1, the other end ground connection of capacitor C 15, and the Vout pin of chip Q1 connects 22 pin of an end of capacitor C 14, chip U1; The other end ground connection of capacitor C 14,6, the 29 pin ground connection of chip U1,7,28 pin of chip U1 meet direct voltage+5V; The end of the 1 pin connecting resistance R13 of chip U1,2 pin of the other end combination hub JP2 of resistance R 13,1 pin of socket JP2 meets direct voltage+5V; The end of the 44 pin connecting resistance R12 of chip U1,3 pin of the other end combination hub JP2 of resistance R 12, the 4 pin ground connection of socket JP2; The end of the 32 pin connecting resistance R11 of chip U1, the other end sending and receiving light diode D3 of resistance R 11 is anodal, Light-Emitting Diode D3 minus earth; 38,39,40,41 pin of chip U1 connect 10,11,12,1 pin of control unit U2 respectively, and 5 pin of control unit U2 meet direct voltage+5V, the 6 pin ground connection of control unit U2; The end of the 36 pin connecting resistance R7 of chip U1, another termination triode V1 base stage of resistance R 7, triode V1 grounded emitter; The end of triode V1 collector electrode connecting resistance R5, R6, another termination direct voltage+24V of resistance R 6, an end of the end of another termination capacitor C 9 of resistance R 5, C10, C11, electrochemical capacitor C16 positive pole, resistance R 4; The other end of capacitor C 9, C10, C11, electrochemical capacitor C16 minus earth, an end of another termination capacitor C 7 of resistance R 4, C8, inductance L 3, the other end ground connection of capacitor C 7, C8; One end of the end of the other end connecting resistance R2 of inductance L 3, double diode D1 positive pole, inductance L 1, capacitor C 2, capacitor C 2 is exported signals to attenuator circuit, an end of another termination capacitor C 3 of resistance R 2; The other end connecting resistance R1 of capacitor C 3, the end of R3, double diode D2 negative pole, the other end ground connection of resistance R 3, another termination double diode D1 negative pole of resistance R 1, signal coupler Z1 input; The end of signal coupler Z1 output termination capacitor C 1, C5, another termination preamplifying circuit of capacitor C 1, the other end of another termination inductance L 1 of capacitor C 5; Signal coupler Z1 centre cap connects an end of capacitor C 4, an end of an end of another termination inductance L 2 of capacitor C 4, double diode D2 positive pole, capacitor C 6, the other end connecting resistance R8 of inductance L 2, an end of capacitor C 12, the other end of capacitor C 6; The end of another termination capacitor C 13 of resistance R 8, resistance R 9, R14, the other end ground connection of capacitor C 12, C13, resistance R 14, resistance R 9 another termination direct voltage+24V.
The equilibrium quantity that
use the push-button switch input of control unit to need by SCM program output signal controlling equalizing circuit, is accomplished the setting of equilibrium quantity.Use the present of optical receiver in a large number at network, equipment debugging and attendant need not to carry a large amount of balanced inserted sheets and remove to safeguard and debug optical receiver, only need the input uniform amount, have just realized the setting of equilibrium quantity easily.Make full use of existing network; Optical fiber is extended to user side; EPON is transparent fully to signal transfer protocol, format modulation signal, and network can be expanded according to the growth of customer volume, and the user needs higher quality requirement really from now on; Can be directly optic fibre extension to the user, realize that real optical fiber registers one's residence.Network using optical fiber, network configuration are very simple, between front end and user, have significantly reduced the active electronic equipment, like light station and amplifier, do not need open-air power supply, and the AC backup of supply power is added up RF PON network according to operator and can be reduced by 90% maintenance than hfc plant.Equipment and number of fibers significantly reduce, and the network architecture is simple and clear, and network is realized passive transmission.
Description of drawings
Fig. 1 is a schematic diagram of the present invention.
Embodiment
are referring to figure: the Single-chip Controlling equalizing circuit is that control unit passes through push-button switch and selects the current menu that needs operation; The equilibrium quantity that uses button key input up and down to need; Single-chip microcomputer converts correspondent voltage into through program and outputs to equalizing circuit; Accomplish balanced the setting, the output signal is to attenuator circuit.
chip Q1, U1, control unit U2, socket JP1, JP2, Light-Emitting Diode D3, resistance R 10-R13, capacitor C 14, C15 form balancing control circuit, output a control signal to equalizing circuit by 36 pin of chip U1; The 36 foot control system signal input resistance R7 of chip U1, through the equalizing circuit of being made up of triode V1, double diode D1, D2, inductance L 1-L3, resistance R 1-R6, R8, R9, R14, capacitor C 1-C13, C16, the output signal is to attenuator circuit.Wherein Z1 is the signal coupling coil, and D1, D2 are double diode, and D3 is a light-emitting diode, and L1～L2 is signal flatness adjustment air core inductor; L3 is a High frequency filter direct current overcurrent inductance, and C1-C4 is the high frequency capacitance, and C5, C6 are resonant capacitance, and C7～C15 is a high-frequency filter capacitor; C16 is an electrochemical capacitor, and R1-R3 is an impedance matching resistance, and R4-R13 is a current-limiting resistance; R14 is a dropping resistor, and JP1 is the debug data mouth, and JP2 is the data serial ports; Q1 is a MCP1541 voltage reference chip, and U1 is the PIC16F887-04 single-chip microcomputer, and U2 is the GSD-008 indicative control unit.
the most attractive benefit of Single-chip Controlling equalizing circuit is to reduce the network operation cost.When disposing solution, its following points technical advantage:
1. output level slope adjustment are convenient: conventional output level of light receiver slope need be with well fixing equalizer model; And balanced adjusting 3dB stepping; Inconvenient debugging; And the optical receiver of my company can according to the requirement of network design output level slope, be provided with the equilibrium quantity that needs through push-button switch on the equipment easily through SCM program control.
. cost is relatively low; Be convenient to upgrade expanding: make full use of existing network, optical fiber is extended to user side, EPON is transparent fully to signal transfer protocol, format modulation signal; Network can be expanded according to the growth of customer volume; The user needs higher quality requirement really from now on, can be directly optic fibre extension to the user, realize that real optical fiber registers one's residence.
. fail safe, reliability height; Maintainable good: network using optical fiber, network configuration are very simple, between front end and user, have significantly reduced the active electronic equipment; Like light station and amplifier; Do not need open-air power supply, the AC backup of supply power is added up RF PON network according to operator and can be reduced by 90% maintenance than hfc plant.Equipment and number of fibers significantly reduce, and the network architecture is simple and clear, and network is realized passive transmission
Claims (1)
1.
A kind of Single-chip Controlling equalizing circuit that is used for cable television network optical receiver is characterized in that comprising inductance L 1-L3, capacitor C 1-C15, electrochemical capacitor C16, double diode D1, D2, light-emitting diode D3, triode V1, resistance R 1-R14, signal coupler Z1, chip Q1, U1, control unit U2 and socket JP1, JP2, and wherein U1 is the PIC16F887-04 singlechip chip; U2 is the GSD-008 indicative control unit, and Q1 is a MCP1541 voltage reference chip, and the 2-5 of chip U1,12,13,19-21,23-27,30,31,33-35,37,42,43 pin are unsettled; 8,9,10,11,14,15 pin of chip U1 connect 2,3,4,9,8,7 pin of control unit U2 respectively, 1 pin of the 16 pin combination hub JP1 of chip U1,2 pin of the 17 pin combination hub JP1 of chip U1; 3 pin of socket JP1 meet direct voltage+5V, the 4 pin ground connection of socket JP1, and 5 pin of socket JP1 connect an end of 18 pin of chip U1, resistance R 10; One end of the other end of resistance R 10, capacitor C 15, the Vin pin of chip Q1 meet direct voltage+5V, the Vss pin of chip Q1, the other end ground connection of capacitor C 15, and the Vout pin of chip Q1 connects 22 pin of an end of capacitor C 14, chip U1; The other end ground connection of capacitor C 14,6, the 29 pin ground connection of chip U1,7,28 pin of chip U1 meet direct voltage+5V; The end of the 1 pin connecting resistance R13 of chip U1,2 pin of the other end combination hub JP2 of resistance R 13,1 pin of socket JP2 meets direct voltage+5V; The end of the 44 pin connecting resistance R12 of chip U1,3 pin of the other end combination hub JP2 of resistance R 12, the 4 pin ground connection of socket JP2; The end of the 32 pin connecting resistance R11 of chip U1, the other end sending and receiving light diode D3 of resistance R 11 is anodal, Light-Emitting Diode D3 minus earth; 38,39,40,41 pin of chip U1 connect 10,11,12,1 pin of control unit U2 respectively, and 5 pin of control unit U2 meet direct voltage+5V, the 6 pin ground connection of control unit U2; The end of the 36 pin connecting resistance R7 of chip U1, another termination triode V1 base stage of resistance R 7, triode V1 grounded emitter; The end of triode V1 collector electrode connecting resistance R5, R6, another termination direct voltage+24V of resistance R 6, an end of the end of another termination capacitor C 9 of resistance R 5, C10, C11, electrochemical capacitor C16 positive pole, resistance R 4; The other end of capacitor C 9, C10, C11, electrochemical capacitor C16 minus earth, an end of another termination capacitor C 7 of resistance R 4, C8, inductance L 3, the other end ground connection of capacitor C 7, C8; One end of the end of the other end connecting resistance R2 of inductance L 3, double diode D1 positive pole, inductance L 1, capacitor C 2, capacitor C 2 is exported signals to attenuator circuit, an end of another termination capacitor C 3 of resistance R 2; The other end connecting resistance R1 of capacitor C 3, the end of R3, double diode D2 negative pole, the other end ground connection of resistance R 3, another termination double diode D1 negative pole of resistance R 1, signal coupler Z1 input; The end of signal coupler Z1 output termination capacitor C 1, C5, another termination preamplifying circuit of capacitor C 1, the other end of another termination inductance L 1 of capacitor C 5; Signal coupler Z1 centre cap connects an end of capacitor C 4, an end of an end of another termination inductance L 2 of capacitor C 4, double diode D2 positive pole, capacitor C 6, the other end connecting resistance R8 of inductance L 2, an end of capacitor C 12, the other end of capacitor C 6; The end of another termination capacitor C 13 of resistance R 8, resistance R 9, R14, the other end ground connection of capacitor C 12, C13, resistance R 14, resistance R 9 another termination direct voltage+24V
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103286172A CN102437882B (en) | 2011-10-26 | 2011-10-26 | Singlechip control equalization circuit for optical receiver of cable television network |
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| CN2011103286172A CN102437882B (en) | 2011-10-26 | 2011-10-26 | Singlechip control equalization circuit for optical receiver of cable television network |
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| CN102437882A true CN102437882A (en) | 2012-05-02 |
| CN102437882B CN102437882B (en) | 2012-12-05 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108574537A (en) * | 2018-07-19 | 2018-09-25 | 苏州市高事达信息科技股份有限公司 | A kind of electric adjustable balancing control circuit of photoreceiver |
| CN109002388A (en) * | 2018-07-17 | 2018-12-14 | 京信通信系统（中国）有限公司 | A kind of adjustment method and device |
Citations (5)
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|---|---|---|---|---|
| US6057951A (en) * | 1995-06-01 | 2000-05-02 | Kabushiki Kaisha Toshiba | Optical receiving circuit |
| CN2631159Y (en) * | 2003-05-15 | 2004-08-04 | 陈苏南 | Cable television two-way terminal controller |
| US6968055B1 (en) * | 2003-03-26 | 2005-11-22 | Silicon Laboratories Inc. | DC holding circuit |
| US7302188B2 (en) * | 2002-01-30 | 2007-11-27 | Mitsubishi Denki Kabushiki Kaisha | Disperse equalizer and disperse equalizing method |
| CN202268887U (en) * | 2011-10-26 | 2012-06-06 | 常熟市高事达光电科技有限公司 | Singlechip control balance circuit for cable television network optical receiver |
-
2011
- 2011-10-26 CN CN2011103286172A patent/CN102437882B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6057951A (en) * | 1995-06-01 | 2000-05-02 | Kabushiki Kaisha Toshiba | Optical receiving circuit |
| US7302188B2 (en) * | 2002-01-30 | 2007-11-27 | Mitsubishi Denki Kabushiki Kaisha | Disperse equalizer and disperse equalizing method |
| US6968055B1 (en) * | 2003-03-26 | 2005-11-22 | Silicon Laboratories Inc. | DC holding circuit |
| CN2631159Y (en) * | 2003-05-15 | 2004-08-04 | 陈苏南 | Cable television two-way terminal controller |
| CN202268887U (en) * | 2011-10-26 | 2012-06-06 | 常熟市高事达光电科技有限公司 | Singlechip control balance circuit for cable television network optical receiver |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109002388A (en) * | 2018-07-17 | 2018-12-14 | 京信通信系统（中国）有限公司 | A kind of adjustment method and device |
| CN109002388B (en) * | 2018-07-17 | 2021-11-23 | 京信网络系统股份有限公司 | Debugging method and device |
| CN108574537A (en) * | 2018-07-19 | 2018-09-25 | 苏州市高事达信息科技股份有限公司 | A kind of electric adjustable balancing control circuit of photoreceiver |
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| CN102437882B (en) | 2012-12-05 |
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Address after: 215532 Jiangsu city of Suzhou province Changshou City ancient town Baimao Industrial Zone Patentee after: Suzhou gaoshida information Polytron Technologies Inc Address before: Changshou City ancient town Baimao Economic Development Zone of Suzhou city of Jiangsu Province in 215532 Patentee before: Changshu Gaoshida Optoelectronic Technology Co., Ltd. |