CN102386979B - Optical receiver uplink laser control circuit transformed by wired television bilateral network - Google Patents
Optical receiver uplink laser control circuit transformed by wired television bilateral network Download PDFInfo
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Abstract
The invention relates to an optical receiver uplink laser control circuit transformed by a wired television bilateral network, belonging to the technical field of wired television. The optical receiver uplink laser control circuit comprises an amplifier tube A1, a double input or gate chip U1, a trigger U2, an amplifying chip U3, a low voltage comparator U4, a driving chip U5, a branch coil Z1, a matching coil Z2, lasers LD and PD, inductors L1-L7, a transistor V1, diodes D1 and D2, a silicon controlled rectifier D3, a light-emitting diode D4, resistors R1-R34, capacitors C1-C27 and adjustable potentiometers Rt1 and Rt2, wherein A1 is an F226 amplifier tube produced by a British company OEI, U1 is an HC32 double input or gate chip, U2 is an HC123 trigger, U3 is an AD8350 amplifying chip, U4 is an MV3931 low voltage comparator, and U5 is a 3656E driving chip. The optical receiver uplink laser control circuit provided by the invention has the advantages of less noise convergence interference, accordance with IP-trend transformation, lower household average cost and high safety and reliability.
Description
Technical field
<b >the present invention relates to a kind of up laser control circuit of optical receiver that cable TV two-way network is transformed that is used for; Belong to the cable TV technical field, especially the transformation of hybrid fiber coax bilateral network is a kind of based on cable TV transmitted in both directions equipment.Optical receiver of the present invention is radio frequency Optical Fiber Transmission (RFoG) optical receiver <>
Background technology
Chinese cable TV (CATV Television) never resembles from that day of being born and face the challenge like this and opportunity to develop today; The core business of cable TV faces the direct competitive of IPTV, direct broadcasting satellite; Its user also no longer only is satisfied with passive watch programs, has proposed diversified interaction entertainment requirement; The development of domestic Digital Television in recent years; Brought unprecedented opportunity to develop for the broadcasting and TV system; The not just variation of TV programme transmission means that Digital Television is brought to the radio and TV operator; And provided brand-new interaction entertainment mode; This new interaction entertainment mode has fundamentally changed the traditional mode that the user has only passive acceptance to serve; Can carry out interaction; Brought brand-new market business opportunity (broadband, VOD, OIP) to the radio and TV operator simultaneously, interactivity is the inevitable choice of cable television operators.And reality is most of cable TV network is unilateral network, can't carry interactive service, must be to the transformation of two-wayization of network implementation.For giving full play to unique advantage and the potential of Broadcasting Cable Network in the national information process; Utilize advanced technology; The transformation of the broadcasting and TV that accelerate metropolitan area network; Build up the data interaction channel; Expand scale, function and the business of cable TV metropolitan area network actively and prudently, use, realize that the radio and television digitlization gets ready for carrying out digital broadcast television and multiple value-added service on a large scale.Through upgrading to original one-way CATV network network, set up broadcast type Traffic Channel and interactive service channel, realize the digitlization, synthesization of radio and television, broadband, intellectuality and multimedization; Simultaneously can all kinds of basic services (speech, data and video) and value-added service (VPN, IP phone, remote teaching or the like) be provided for the user.
<b >are both at home and abroad for traditional two-way high frequency cable (HFC) network; Early stage for realizing broadband and two-way function; Mainly based on North America cable TV modulator-demodulator product standard (DOCSIS); Be that cable modem terminal system (CMTS, Cable Modem Termination System), upconverter, Operation & Maintenance System server (Oss Server are set on the basis of hfc plant system configuration) and equipment such as cable modem be implemented in transmission CATV signal and data communication service in the hfc plant.Though technical standard and product be comparative maturity all, because the complicated network structure, a large amount of optical nodes and radio frequency (RF) amplifier, increased the difficulty and the cost of network design, construction, maintenance greatly.This technology is except that the higher share of the more sparse North America DOCSIS standard access way occupation ratio of population distribution; In the Asia and other people mouthful relatively seldom than the number of users of the regional standard of comparatively dense, this enforcement in several years of domestic radio and TV operator is indicating that also the DOCSIS standard is difficult to become the bidirectional rebuilding technology of main flow in China <>
Summary of the invention
the purpose of this invention is to provide a kind of up laser control circuit of optical receiver that cable TV two-way network is transformed that is used for; Its noise collection effect disturbs few, meets the lower and fail safe of cost per family that the IPization trend transforms, reliability height.
the objective of the invention is to reach like this, and the up laser control circuit of optical receiver that a kind of cable TV two-way network is transformed comprises amplifier tube A1; Dual input or door chip U1; Trigger U2; Amplify chip U3; Low pressure comparator U4; Chip for driving U5; The coil Z1 of branch; Matched coil Z2; Laser LD; Inductance L1-L7; Triode V1; Diode D1; Controllable silicon D3; Light-emitting diode D4; Resistance R1-R34; Electric capacity C1-C27 and adjustable potentiometer Rt1; Rt2; Wherein A1 is the Britain F226 of an OEI company amplifier tube, and U1 is HC32 dual input or door chip, and U2 is the C123 trigger; U3 is that AD8350 amplifies chip; U4 is a MV3931 low pressure comparator; U5 is the 656E chip for driving, the end of upward signal input capacitance C1,1 pin of another termination amplifier tube A1 of electric capacity C1; The 2 pin ground connection of amplifier tube A1,3 pin of amplifier tube A1 connect the end of inductance L1; The coil Z1 of branch primary input end, the coil Z1 of branch centre cap ground connection; The end of the input connecting resistance R1 of coil Z1 branch of branch, the other end ground connection of resistance R1, the coil Z1 master of branch exports the end of termination capacitor C2; 1 pin of another termination matched coil Z2 of electric capacity C2, the 3 pin ground connection of matched coil Z2, the 2 pin of matched coil Z2 connect the end of electric capacity C4; The end of the other end connecting resistance R5 of electric capacity C4; Laser LD negative pole, laser LD plus earth, the end of the other end connecting resistance R6 of resistance R5; The end of the other end connecting resistance R7 of resistance R6, the other end of resistance R7 connect the end of electric capacity C5 through the A point; 14 pin of chip for driving U5, another termination capacitor C16 of inductance L1; Resistance R2; The end of R3; The other end ground connection of electric capacity C16, resistance R2; Another termination capacitor C15 of R3; The end of inductance L2, the other end ground connection of electric capacity C15; The other end of inductance L2; The termination power Vcc of resistance R4, another termination triode V1 collector electrode of resistance R4, the end of triode V1 base stage connecting resistance R8; The end of the other end connecting resistance R9 of resistance R8; 3 pin of another termination dual input of resistance R9 or door chip U1, the end of triode V1 emitter connecting resistance R11, the other end sending and receiving optical diode D4 of resistance R11 is anodal; Light-emitting diode D4 minus earth; The end of the output termination capacitor C3 of coil Z1 branch of branch, the end of another termination inductance L3 of electric capacity C3, another termination capacitor C8 of inductance L3; The end of inductance L4; The other end ground connection of electric capacity C8; Another termination capacitor C9 of inductance L4; The end of inductance L5, the other end ground connection of electric capacity C9, the end of another termination capacitor C10 of inductance L5; Another termination inductance L6 of electric capacity C10; The end of electric capacity C11; The end of another termination capacitor C13 of inductance L6, the other end ground connection of electric capacity C13, another termination inductance L7 of electric capacity C11; The end of electric capacity C12; The end of another termination capacitor C14 of inductance L7; The other end ground connection of electric capacity C14, the end of another termination capacitor C6 of electric capacity C12, the end of the other end connecting resistance R8 of electric capacity C6; Amplify 1 pin of chip U3; The end of another termination capacitor C7 of resistance R8; Another termination of electric capacity C7 is amplified 8 pin of chip U3, amplifies the 2 pin ground connection of chip U3, and 3 pin that amplify chip U3 are unsettled; 5 pin that amplify chip U3 connect the end of electric capacity C19; The other end ground connection of electric capacity C19,6 pin that amplify chip U3 connect the end of electric capacity C20, the other end ground connection of electric capacity C20; Amplify the 7 pin connecting resistance R13 of chip U3; The end of electric capacity C26; The other end ground connection of electric capacity C26, the other end of resistance R13; The termination power Vcc of electric capacity C25, the other end ground connection of electric capacity C25; 6 pin that amplify chip U3 connect the end of electric capacity C20; The other end ground connection of electric capacity C20, the end of the 4 pin connecting resistance R12 of amplification chip U3, the end of the other end connecting resistance R14 of resistance R12; 5 pin of low pressure comparator U4; The end of the other end connecting resistance R15 of resistance R14; 1 pin of low pressure comparator U4; Another termination power Vcc of resistance R15, the end of the 6 pin connecting resistance R25 of low pressure comparator U4, the 1 pin of another termination adjustable potentiometer Rt1 of resistance R25; The end of resistance R23; The end of the 2 pin connecting resistance R24 of adjustable potentiometer Rt1; The other end ground connection of resistance R24,2 pin of another termination controllable silicon D3 of resistance R23; The end of resistance R18, the 1 pin ground connection of controllable silicon D3; Another termination low-pressure ratio of resistance R19 is than 8 pin of device U4; The end of resistance R21; Another termination low-pressure ratio of resistance R21 is than 7 pin of device U4; Diode D2 is anodal, diode D2 negative pole connecting resistance R20; R22; The end of electric capacity C22, electric capacity C22; The other end ground connection of resistance R22; Another termination low-pressure ratio of resistance R20 is than 3 pin of device U4; The other end connecting resistance R16 of resistance R18; R17; The end of electric capacity C21, resistance R17; The other end ground connection of electric capacity C21, another termination low-pressure ratio of resistance R16 is than 2 pin of device U4; The 4 pin ground connection of low pressure comparator U4; 1 of trigger U2; 8; 14 pin ground connection, 4 of trigger U2; 12 pin are unsettled, the 15 pin connecting resistance R10 of trigger U2; The end of electric capacity C18; Diode D1 negative pole; The other end ground connection of electric capacity C18; The other end of resistance R10; Diode D1 is anodal; The end of electric capacity C17; 3 of trigger U2; 16 pin; 14 pin of dual input or door chip U1 connect power Vcc, the other end ground connection of electric capacity C17, and 2 pin of trigger U2 connect 2 pin of dual input or door chip U1 through the B point; The end of resistance R30; 13 pin of trigger U2 connect 1 pin of dual input or door chip U1; The 4-6 of dual input or door chip U1; The 8-13 pin is unsettled, the 7 pin ground connection of dual input or door chip U1, the end of the other end connecting resistance R29 of resistance R30; 5 pin of another termination chip for driving U5 of resistance R29; The end of resistance R27; The other end of resistance R27 connects laser PD negative pole through the C point; The end of resistance R26; The end of electric capacity C23; 1 of chip for driving U5; 21 pin, the other end ground connection of electric capacity C23,2 pin of another termination chip for driving U5 of resistance R26; 6 pin of another termination chip for driving U5 of resistance R28; The end of resistance R31; The other end ground connection of resistance R31,7 of chip for driving U5; 19 pin ground connection, 10 of chip for driving U5; 23 pin are unsettled; The end of the 3 pin connecting resistance R32 of chip for driving U5; The other end ground connection of resistance R32, the end of the 22 pin connecting resistance R33 of chip for driving U5, the other end ground connection of resistance R33; The end of the 24 pin connecting resistance R34 of chip for driving U5; 1 pin of another termination adjustable potentiometer Rt2 of resistance R34, the 2 pin ground connection of adjustable potentiometer Rt2, it is anodal that 20 pin of chip for driving U5 meet laser PD.
the present invention will provide a kind of up laser control circuit of optical receiver that cable TV two-way network is transformed that is used for; Utilize control circuit to control up laser; Because inner burst type passback laser is with time division multiplexing mode and user terminal (CM) or the return path signal of subscriber computer top box (STB) synchronous working; When signal; Burst type passback laser is opened work; When no signal, burst type passback laser cuts out, and invades to suppress return noise.Burst type passback laser and CM or STB strict synchronism; So having avoided two lasers is opened simultaneously and is bumped; Even cover nearly 32 little nodes, any moment also only has only that corresponding passback optical link of a RFOG optical receiver in work.Maximum 32 RfoG optical receivers are shared 1 passback receiver; Passback receiver RF return path signal transfers to headend equipment through the front radio-frequency blender; Front end (or sub-headend) machine room front radio-frequency blender significantly reduces with the passback optical receiver; Machine room space and construction cost are lower; Manage more simple; Improvement cost is lower per family, is convenient to upgrade expanding, and reliability is high.System and network architecture simple transparent, network is realized EPON, meets IPization, and network operation is convenient, fast, and network reliability significantly improves.
Description of drawings
Fig. 1 is a complete machine theory diagram of the present invention.
Embodiment
are referring to figure: the up laser control circuit of RFoG photoreceiver is a upward signal input amplifier tube; Amplifier tube amplifying signal input branch coil primary input end; The coil master of branch output output signal one road is to up laser instrument; Another road is to the burst type drive circuit for laser; Path of branch output is exported signal to amplifying circuit through low-pass filter circuit; Amplifying circuit output signal is to comparison circuit; Comparison circuit output signal is to single-shot trigger trigger; Single-shot trigger trigger is connected with dual input OR circuit, burst type drive circuit for laser; The unlatching of control laser instrument and pass section are accomplished the control of up laser instrument.
upward signal input capacitance C1 is to amplifier tube A1; By inductance L1; Electric capacity C15 resistance R2; R3 forms power supply circuits makes amplifier tube A1 work; Behind the amplifier tube A1 amplifying signal through branch line circle Z1; Electric capacity C2 matched coil Z2 electric capacity C4; Electric capacity C4 output signal one road to laser LD is anodal; Another road is through 14 pin of resistance 5-R7 to chip for driving U5; Coil Z1 branch of branch output output signal process is by inductance L3-L7; The low-pass filter circuit that electric capacity C8-C14 forms arrives by electric capacity C6; C26; Resistance R12; R13; Amplify the amplifying circuit that chip U3 forms; Amplifying circuit output signal arrives by resistance R14-R25; Electric capacity C21; C22; Diode D2; Controllable silicon D3; Adjustable potentiometer Rt1; The comparison circuit that low pressure comparator U4 forms; Diode D1; Resistance R10; Electric capacity C17; C18; Trigger U2 forms two dual input OR circuit that can heavily trigger single-shot trigger trigger output signal one road to dual input or door chip U1; Another road is to the burst type drive circuit for laser; Dual input OR circuit output signal one tunnel arrives by resistance R4; R11; Triode V1; The indicating circuit that light-emitting diode D4 forms; Another road is to burst type drive circuit for laser, resistance R26-R34; Electric capacity C23; C27; Adjustable potentiometer Rt2; Chip for driving U5 forms the opening and closing of burst type drive circuit for laser control laser.Wherein A1 is the Britain F226 of an OEI company amplifier tube; V1 is triode; D2 is a diode, and D3 is a controllable silicon, and D4 is a green LED; U1 is dual input or door chip; U2 is the trigger chip, and U3 is for amplifying chip, and U4 is a low pressure comparator chip; U5 is burst type laser driving chip; PD is a laser, and Z1 is branch's coil, and Z2 is matched coil; L2 is that direct current overcurrent inductance is hollow vibration inductance, C1-C4; C7 is the high frequency capacitance, and C8-C14 is that oscillating capacitance is that high-frequency filter capacitor is an electrochemical capacitor, and Rt1 is an adjustable potentiometer, and R1 is that impedance matching resistance is a current-limiting resistance, and R10 is a divider resistance.
The most attractive benefit of
the up laser control circuit of optical receiver is to adopt burst type passback laser to invade to suppress return noise, reduces the network operation cost greatly.Because burst type passback laser and CM or STB strict synchronism; So having avoided two lasers is opened simultaneously and is bumped; Even cover nearly 32 little nodes, any moment also only has only that corresponding passback optical link of a RFoG equipment in work.In addition, the signal that transmits on the optical fiber " cleaner " is not because light signal is vulnerable to resemble suffered interference the radiofrequency signal of transmission over coaxial cable." passive " construed, when signal during in transmission over networks, optical transmission need not power supply or active electronic assembly.Active equipment in the network is few more, and every user's maintenance cost is just low more in the cycle in useful life of network.
are when disposing the FTTP solution; It is essential to make full use of existing business support system (BSS) and OSS (OSS), so that the existing investment of cable television operators protection on equipment, management, charging and fault eliminating etc. are used.Adding new BSS and OSS application, workflow and process indiscreetly will be inefficient with support optical fiber solution, and will cause the increase of operation cost and the reduction of level of customer service.Through realizing measured non-proprietary RFoG solution; Cable television operators can deployed fiber to family (FTTP fiber to the premise) solution; Not only in the current competitive advantage that wins; And can be, and need not to change last kilometer connection that is connected to user resident in future economy evolution efficiently to GPON.
<b >IPization is the general trend of information network development.The transmission of a new generation's encoding and decoding technique all is based on the IP form, so the necessary IPization of front end, and front end IPization must drive the IPization of transmission network.The present invention is about to the two-way net equipment of a cable TV of issue " two-wayization of cable television network transformation instruction " up-to-date development according to SARFT(The State Administration of Radio and Television); It is ethernet passive optical network (EPON Passive Optical Network) 1 product transforming of the two-way net of technology, its following points technical advantage: <>
are noise collection effect 1.: inner burst type passback laser is with time division multiplexing mode and CM(user terminal) or STB(subscriber computer top box) return path signal synchronous working; When signal; Burst type passback laser is opened work; When no signal; Burst type passback laser cuts out, and invades to suppress return noise; Because burst type passback laser and CM or STB strict synchronism; So having avoided two lasers is opened simultaneously and is bumped; Even cover nearly 32 little nodes, any moment also only has only that corresponding passback optical link of a RFoG equipment in work.In addition, the signal that transmits on the optical fiber " cleaner " is not because light signal is vulnerable to resemble suffered interference the radiofrequency signal of transmission over coaxial cable.
. meet the IPization trend: system and network architecture simple transparent, network is realized EPON, and network operation is convenient, fast, and network reliability significantly improves.
. cost is relatively low per family: make full use of existing business support system (BSS), OSS (OSS) and CMTS headend equipment; 1 passback receiver is shared at maximum 32 RfoG light stations, and passback receiver RF return path signal transfers to headend equipment through the front radio-frequency blender; Front end (or sub-headend) machine room front radio-frequency blender significantly reduces with the passback optical receiver, and machine room space and construction cost are lower, manage more simple.
. fail safe, reliability height; Maintainable good: as to be convenient to upgrade expanding; System and network architecture simple transparent, network is realized EPON, meets IPization; Between front end and user, significantly reduced the active electronic equipment; Equipment and number of fibers significantly reduce, and the network architecture is simple and clear, realize passive transmission; Easy to maintenance, quick, network reliability significantly improves.
< > Wherein: <>
RFoG:RF over lass, the radio frequency Optical Fiber Transmission.
BSS:Business support system, business support system.Systems such as charging, clearing, account, customer service, business.
<b >OSS:Operation support system, OSS.System such as webmaster, network optimization <>
Claims (1)
1. < > The up laser control circuit of optical receiver that a kind of cable TV two-way network is transformed is characterized in that comprising amplifier tube A1; Dual input or door chip U1; Trigger U2; Amplify chip U3; Low pressure comparator U4; Chip for driving U5; The coil Z1 of branch; Matched coil Z2; Laser LD; Inductance L1-L7; Triode V1; Diode D1; Controllable silicon D3; Light-emitting diode D4; Resistance R1-R34; Electric capacity C1-C27 and adjustable potentiometer Rt1, wherein A1 is the Britain F226 of an OEI company amplifier tube; U1 is HC32 dual input or door chip, and U2 is the C123 trigger, and U3 is that AD8350 amplifies chip; U4 is a MV3931 low pressure comparator; U5 is 656E chip for driving; L2 is a direct current overcurrent inductance, and 3-L7 is hollow vibration inductance, C1-C4; C7 is that high frequency capacitance is an oscillating capacitance, and C5 is a high-frequency filter capacitor, and C26 is an electrochemical capacitor; R1 is an impedance matching resistance, and R2-R9 is a current-limiting resistance, and R10 is a divider resistance; The end of upward signal input capacitance C1,1 pin of another termination amplifier tube A1 of electric capacity C1, the 2 pin ground connection of amplifier tube A1; 3 pin of amplifier tube A1 connect the end of inductance L1; The coil Z1 of branch primary input end, the coil Z1 of branch centre cap ground connection, the end of the input connecting resistance R1 of coil Z1 branch of branch; The other end ground connection of resistance R1, the coil Z1 master of branch exports the end of termination capacitor C2,1 pin of another termination matched coil Z2 of electric capacity C2; The 3 pin ground connection of matched coil Z2, the 2 pin of matched coil Z2 connect the end of electric capacity C4, the end of the other end connecting resistance R5 of electric capacity C4; Laser LD negative pole; Laser LD plus earth, the end of the other end connecting resistance R6 of resistance R5, the end of the other end connecting resistance R7 of resistance R6; The other end of resistance R7 connects the end of electric capacity C5 through the A point; 14 pin of chip for driving U5, another termination capacitor C16 of inductance L1; Resistance R2; The end of R3, the other end ground connection of electric capacity C16; Resistance R2; Another termination capacitor C15 of R3; The end of inductance L2, the other end ground connection of electric capacity C15, the other end of inductance L2; The termination power Vcc of resistance R4; Another termination triode V1 collector electrode of resistance R4, the end of triode V1 base stage connecting resistance R8, the end of the other end connecting resistance R9 of resistance R8; 3 pin of another termination dual input of resistance R9 or door chip U1, the end of triode V1 emitter connecting resistance R11, the other end sending and receiving optical diode D4 of resistance R11 is anodal; Light-emitting diode D4 minus earth, the end of the output termination capacitor C3 of coil Z1 branch of branch, the end of another termination inductance L3 of electric capacity C3; Another termination capacitor C8 of inductance L3; The end of inductance L4, the other end ground connection of electric capacity C8, another termination capacitor C9 of inductance L4; The end of inductance L5; The other end ground connection of electric capacity C9, the end of another termination capacitor C10 of inductance L5, another termination inductance L6 of electric capacity C10; The end of electric capacity C11; The end of another termination capacitor C13 of inductance L6, the other end ground connection of electric capacity C13, another termination inductance L7 of electric capacity C11; The end of electric capacity C12; The end of another termination capacitor C14 of inductance L7; The other end ground connection of electric capacity C14, the end of another termination capacitor C6 of electric capacity C12, the end of the other end connecting resistance R8 of electric capacity C6; Amplify 1 pin of chip U3; The end of another termination capacitor C7 of resistance R8; Another termination of electric capacity C7 is amplified 8 pin of chip U3, amplifies the 2 pin ground connection of chip U3, and 3 pin that amplify chip U3 are unsettled; 5 pin that amplify chip U3 connect the end of electric capacity C19; The other end ground connection of electric capacity C19,6 pin that amplify chip U3 connect the end of electric capacity C20, the other end ground connection of electric capacity C20; Amplify the 7 pin connecting resistance R13 of chip U3; The end of electric capacity C26; The other end ground connection of electric capacity C26, the other end of resistance R13; The termination power Vcc of electric capacity C25, the other end ground connection of electric capacity C25; 6 pin that amplify chip U3 connect the end of electric capacity C20; The other end ground connection of electric capacity C20, the end of the 4 pin connecting resistance R12 of amplification chip U3, the end of the other end connecting resistance R14 of resistance R12; 5 pin of low pressure comparator U4; The end of the other end connecting resistance R15 of resistance R14; 1 pin of low pressure comparator U4; Another termination power Vcc of resistance R15, the end of the 6 pin connecting resistance R25 of low pressure comparator U4, the 1 pin of another termination adjustable potentiometer Rt1 of resistance R25; The end of resistance R23; The end of the 2 pin connecting resistance R24 of adjustable potentiometer Rt1; The other end ground connection of resistance R24,2 pin of another termination controllable silicon D3 of resistance R23; The end of resistance R18, the 1 pin ground connection of controllable silicon D3; Another termination low-pressure ratio of resistance R19 is than 8 pin of device U4; The end of resistance R21; Another termination low-pressure ratio of resistance R21 is than 7 pin of device U4; Diode D2 is anodal, diode D2 negative pole connecting resistance R20; R22; The end of electric capacity C22, electric capacity C22; The other end ground connection of resistance R22; Another termination low-pressure ratio of resistance R20 is than 3 pin of device U4; The other end connecting resistance R16 of resistance R18; R17; The end of electric capacity C21, resistance R17; The other end ground connection of electric capacity C21, another termination low-pressure ratio of resistance R16 is than 2 pin of device U4; The 4 pin ground connection of low pressure comparator U4; 1 of trigger U2; 8; 14 pin ground connection, 4 of trigger U2; 12 pin are unsettled, the 15 pin connecting resistance R10 of trigger U2; The end of electric capacity C18; Diode D1 negative pole; The other end ground connection of electric capacity C18; The other end of resistance R10; Diode D1 is anodal; The end of electric capacity C17; 3 of trigger U2; 16 pin; 14 pin of dual input or door chip U1 connect power Vcc, the other end ground connection of electric capacity C17, and 2 pin of trigger U2 connect 2 pin of dual input or door chip U1 through the B point; The end of resistance R30; 13 pin of trigger U2 connect 1 pin of dual input or door chip U1; The 4-6 of dual input or door chip U1; The 8-13 pin is unsettled, the 7 pin ground connection of dual input or door chip U1, the end of the other end connecting resistance R29 of resistance R30; 5 pin of another termination chip for driving U5 of resistance R29; The end of resistance R27; The other end of resistance R27 connects laser PD negative pole through the C point; The end of resistance R26; The end of electric capacity C23; 1 of chip for driving U5; 21 pin, the other end ground connection of electric capacity C23,2 pin of another termination chip for driving U5 of resistance R26; 6 pin of another termination chip for driving U5 of resistance R28; The end of resistance R31; The other end ground connection of resistance R31,7 of chip for driving U5; 19 pin ground connection, 10 of chip for driving U5; 23 pin are unsettled; The end of the 3 pin connecting resistance R32 of chip for driving U5; The other end ground connection of resistance R32, the end of the 22 pin connecting resistance R33 of chip for driving U5, the other end ground connection of resistance R33; The end of the 24 pin connecting resistance R34 of chip for driving U5; 1 pin of another termination adjustable potentiometer Rt2 of resistance R34, the 2 pin ground connection of adjustable potentiometer Rt2, it is anodal that 20 pin of chip for driving U5 meet laser PD <>
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103286384A CN102386979B (en) | 2011-10-26 | 2011-10-26 | Optical receiver uplink laser control circuit transformed by wired television bilateral network |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103286384A CN102386979B (en) | 2011-10-26 | 2011-10-26 | Optical receiver uplink laser control circuit transformed by wired television bilateral network |
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| Publication Number | Publication Date |
|---|---|
| CN102386979A CN102386979A (en) | 2012-03-21 |
| CN102386979B true CN102386979B (en) | 2012-11-21 |
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| CN2011103286384A Active CN102386979B (en) | 2011-10-26 | 2011-10-26 | Optical receiver uplink laser control circuit transformed by wired television bilateral network |
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| CN106535010A (en) * | 2015-09-15 | 2017-03-22 | 青岛海信宽带多媒体技术有限公司 | Optical network unit of passive optical network, and optical module thereof |
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| CN2810069Y (en) * | 2005-07-25 | 2006-08-23 | 武汉电信器件有限公司 | An optical receiving module for television signals |
| CN101702634A (en) * | 2009-11-12 | 2010-05-05 | 无锡路通光电技术有限公司 | Device and method for realizing providing DOCSIS service by radio frequency passive optical network |
| CN201515468U (en) * | 2009-09-09 | 2010-06-23 | 成都华塑电子技术开发有限公司 | Laser receiving and transmitting integral machine |
| CN102045551A (en) * | 2010-12-30 | 2011-05-04 | 常熟市高事达光电科技有限公司 | Radio frequency optical fiber transmission optical workstation for two-way network transformation of cable television |
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| CN2810069Y (en) * | 2005-07-25 | 2006-08-23 | 武汉电信器件有限公司 | An optical receiving module for television signals |
| CN201515468U (en) * | 2009-09-09 | 2010-06-23 | 成都华塑电子技术开发有限公司 | Laser receiving and transmitting integral machine |
| CN101702634A (en) * | 2009-11-12 | 2010-05-05 | 无锡路通光电技术有限公司 | Device and method for realizing providing DOCSIS service by radio frequency passive optical network |
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