CN203933868U - Multiplexed signals line is realized the module TV of system communication - Google Patents
Multiplexed signals line is realized the module TV of system communication Download PDFInfo
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Abstract
The utility model discloses multiplexed signals line and realize the module TV of system communication, it comprises smart card system and display system, and smart card system is connected by holding wire with display system.At smart card system end, by high-frequency signal modular converter, by the level conversion of high-frequency signal, be that signal post needs level, and by the level conversion of low frequency signal, be that signal post needs level by low frequency signal modular converter, by signal synthesizing module, the signal of high-frequency signal modular converter and the output of low frequency signal modular converter is synthesized to a kind of signal, realize by single signal line transmit communications signals; At display system end, by high-frequency signal separation module, the low frequency signal in composite signal is removed, restore high-frequency signal, and by low frequency signal separation module, composite signal is carried out to separating reducing and go out low frequency signal, under the prerequisite of form that does not change TV, utilized existing interface to realize data communication between two kinds of systems, saved the cost of complete machine.
Description
Technical field
The utility model relates to electronic technology field, and particularly multiplexed signals line is realized the module TV of system communication.
Background technology
Fast development along with intelligent electronic device industry, smart mobile phone, our life of change progressively of the intelligent terminals such as intelligent appliance, the use amount of smart machine is in the ever-increasing while, also driven the development of smart machine periphery product, the quantity that user has intelligent terminal is constantly increasing, the upgrading problem of intelligent terminal day by day highlights, long service life due to smart machine, and electric terminal update speed is fast, user can not upgrade immediately following market rhythm the intelligent terminal of oneself, particularly as the higher smart machine of this price of intelligent TV set, the frequency that user upgrades can be lower.
For above-mentioned situation, modular electronic equipment is an extraordinary solution, for example, intelligent TV set can be by intelligent system and television display system separated, user's intelligent system of only need upgrading, user only need to pay cheap upgrade cost like this, just can make out-of-date intelligent television upgrade to the intelligent television of the market mainstream, this mode is not only for user provides better Product Experience, simultaneously also for television manufacturer has found another kind of profit channel, make intelligent television product have more the market competitiveness, but in the R&D process of modularization TV product, series of problems highlights, one of them outstanding problem is exactly the signal connectivity problem of intelligent system and television display system, because if signal of communication is too much, will cause both volumes of connector very large, so not only can cause and produce fraction defective increase, also can make the increase of cost and intelligent system volume simultaneously, if but signal of communication is very few, just cannot meet two communication requirements between system.Therefore the communication, how realizing under the prerequisite that does not increase interface between two systems becomes this area urgent problem.
Utility model content
In view of above-mentioned the deficiencies in the prior art part, the module TV that provides multiplexed signals line to realize system communication is provided the purpose of this utility model, can be under the prerequisite of form that does not change TV, and realize between smart card system and display system and communicating by letter.
In order to achieve the above object, the utility model has been taked following technical scheme:
Multiplexed signals line is realized a module TV for system communication, and it comprises smart card system and display system, and described smart card system is connected by holding wire with display system;
Described smart card system comprises:
Being used for is the high-frequency signal modular converter that signal post needs level by the level conversion of high-frequency signal;
Being used for is the low frequency signal modular converter that signal post needs level by the level conversion of low frequency signal;
For the signal of high-frequency signal modular converter and the output of low frequency signal modular converter is synthesized to a kind of signal, realize the signal synthesizing module of being communicated by letter by single signal line;
Described display system comprises:
For the low frequency signal of the composite signal of signal synthesizing module output is removed, restore the high-frequency signal separation module of high-frequency signal;
For the composite signal of signal synthesizing module output is carried out to the low frequency signal separation module that separating reducing goes out low frequency signal;
Described high-frequency signal modular converter is connected signal synthesizing module with low frequency signal modular converter, and described signal synthesizing module connects high-frequency signal separation module and low frequency signal separation module.
Described multiplexed signals line is realized in the module TV of system communication, described high-frequency signal modular converter comprises the first triode, the second triode, the first resistance, the second resistance, the 3rd resistance and the 4th resistance, one end of described the first resistance is the input of high-frequency signal modular converter, the other end of the first resistance connects the base stage of the first triode, the grounded emitter of described the first triode, the collector electrode of the first triode connects the base stage of the second triode, also by the 4th resistance, connects the first feeder ear; The grounded emitter of described the second triode, the collector electrode of the second triode connect the 3rd resistance one end, also by the second resistance, connect described the first feeder ear; The other end of described the 3rd resistance is output, the connection signal synthesizing module of high-frequency signal modular converter.
Described multiplexed signals line is realized in the module TV of system communication, and described low frequency signal modular converter comprises: the 3rd triode, the 4th triode, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance and the 9th resistance; One end of described the 5th resistance is the input of low frequency signal modular converter, the other end of the 5th resistance connects the base stage of the 4th triode, the transmitting collection ground connection of the 4th triode, the collector electrode of the 4th triode connect the 3rd triode base stage, also by the 6th resistance, connect the second feeder ear; The transmitting collection ground connection of described the 3rd triode, the collector electrode of described the 3rd triode connects one end of the 8th resistance and one end of the 9th resistance by the 7th resistance; The other end of described the 8th resistance connects described the second feeder ear, and the other end of described the 9th resistance is output, the connection signal synthesizing module of low frequency signal modular converter.
Described multiplexed signals line is realized in the module TV of system communication, and described signal synthesizing module comprises the first operational amplifier, the tenth resistance, the 11 resistance, the 12 resistance and the 13 resistance; The other end that described the first operational amplifier inverting input connects described the 3rd resistance and the other end of the 9th resistance, also by the tenth resistance, be connected the output of the first operational amplifier, the normal phase input end of described the first operational amplifier passes through respectively the 11 resistance, the 12 resistance and the 13 grounding through resistance, the output that the output of the first operational amplifier is signal synthesizing module.
Described multiplexed signals line is realized in the module TV of system communication, and low frequency signal separation module comprises the second operational amplifier, the 3rd operational amplifier, the 5th triode, the 6th triode, diode, the 14 resistance, the 15 resistance, the 16 resistance and the 17 resistance; The normal phase input end of the inverting input of the second operational amplifier and the 3rd operational amplifier be low frequency signal separation module input, by holding wire, be connected the output of signal synthesizing module, the normal phase input end of described the second operational amplifier connects the 3rd feeder ear, and the output of the second operational amplifier connects the base stage of the 6th triode by the 16 resistance; The grounded emitter of the 6th triode, the collector electrode of the 6th triode connects the base stage of the 5th triode, also by the 17 resistance, connects the 4th feeder ear; The grounded emitter of the 5th triode, the collector electrode of the 5th triode connect the 15 resistance one end, also by the 14 resistance, connect described the 4th feeder ear; The other end of the 15 resistance is the output of low frequency signal separation module; The inverting input of described the 3rd operational amplifier connects the 4th feeder ear, and the output of the 3rd operational amplifier is unsettled; The plus earth of described diode, the negative pole of diode connects the signal input part of the second operational amplifier and the signal input part of the 3rd operational amplifier.
Described multiplexed signals line is realized in the module TV of system communication, and described high-frequency signal separation module comprises:
For the subtraction unit that the low frequency signal of signal synthesizing module is removed;
For the signal of subtraction unit output is carried out to the level conversion unit that level conversion is reduced to high-frequency signal;
The first input end of described subtraction unit connects the other end of the 15 resistance, and the second input of described subtraction unit connects the output of signal synthesizing module by holding wire, and the output of described subtraction unit connects level conversion unit.
Described multiplexed signals line is realized in the module TV of system communication, four-operational amplifier, the 18 resistance, the 19 resistance, the 20 resistance and the 21 resistance that described subtraction unit comprises, the inverting input of described four-operational amplifier connect the 18 resistance one end, also by the 20 resistance, connect the output of four-operational amplifier, the other end of described the 18 circuit connects the other end of the 15 resistance, and the normal phase input end of four-operational amplifier connects one end of the 19 resistance, also by the 21 grounding through resistance; The inverting input that the other end of described the 19 resistance connects the second operational amplifier is with the normal phase input end of the 3rd operational amplifier, be also connected signal synthesizing module by holding wire, the output of described four-operational amplifier be subtraction unit output, connect level conversion unit.
Described multiplexed signals line is realized in the module TV of system communication, described level conversion unit comprises the 7th triode, the 8th triode, the 22 resistance, the 23 resistance, the 24 resistance, the 25 resistance, the 26 resistance and the 27 resistance, the base stage of described the 7th triode connects the output of four-operational amplifier by the 22 resistance, also by the 23 grounding through resistance, the grounded emitter of the 7th triode, the collector electrode of the 7th triode connects the 4th feeder ear by the 24 resistance, also by the 25 resistance, connect the 8th base stage of triode and one end of the 27 resistance, the equal ground connection of the other end of the emitter of the 8th triode and the 27 resistance, the current collection of the 8th triode is the output of high-frequency signal separation module very, by the 26 resistance, connect the 4th feeder ear.
Compared to prior art, the multiplexed signals line that the utility model provides is realized the module TV of system communication, at smart card system end, by high-frequency signal modular converter, by the level conversion of high-frequency signal, be that signal post needs level, and by the level conversion of low frequency signal, be that signal post needs level by low frequency signal modular converter, by signal synthesizing module, the signal of high-frequency signal modular converter and the output of low frequency signal modular converter is synthesized to a kind of signal, realize, by single signal line, the signal of smart card system is transferred to display system; At display system end, by high-frequency signal separation module, the low frequency signal in the composite signal of signal synthesizing module output is removed, restore high-frequency signal, and by low frequency signal separation module, the composite signal of signal synthesizing module output is carried out to separating reducing and go out low frequency signal, the high-frequency signal and the low frequency signal that restore high-frequency signal and low frequency signal and smart card system output are consistent, have realized the communication between two systems.The utility model is under the prerequisite of form that does not change module TV, and the transmission channel of having utilized existing interface to realize two kinds of signals shares to carry out data communication between module television system, saved the cost of module TV.
Accompanying drawing explanation
Fig. 1 is the structured flowchart that the utility model multiplexed signals line is realized the module TV of system communication.
Fig. 2 is the circuit diagram that the utility model multiplexed signals line is realized the smart card system in the module TV of system communication.
Fig. 3 is that the utility model multiplexed signals line is realized smart card system in the module TV of system communication and carried out the voltage waveform view of signal when synthetic.
Fig. 4 is the circuit diagram that the utility model multiplexed signals line is realized the display system in the module TV of system communication.
Fig. 5 is that the utility model multiplexed signals line is realized display system in the module TV of system communication and carried out the voltage waveform view of signal when separated.
Embodiment
The module TV that the utility model provides a kind of multiplexed signals line to realize system communication, for making the purpose of this utility model, technical scheme and effect clearer, clear and definite, further describes the utility model referring to the accompanying drawing embodiment that develops simultaneously.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Refer to Fig. 1, the module TV that the multiplexed signals line that the utility model provides is realized system communication comprises: smart card system 10 and display system 20, described smart card system 10 is connected by holding wire 30 with display system 20, described holding wire 30 can adopt high-definition signal line, by holding wire 30, the transfer of data of smart card system 10 outputs is processed and displayed to display system 20.
In the present embodiment, the signal processing of the electronic equipments such as described module TV is intelligent modularized television set, described smart card system 10 mainly completes TV signal access, decoding, and the function such as intelligent operating system, display system 20 mainly comprises power module, optical module, the module such as interface module and display module, be mainly used in the optics of television set, power supply, sound, and the work such as demonstration, intelligent modularized television set inserts respectively two connectors in system by holding wire 30 and realizes two signals between system and connect, power supply supply, data, and control signal communication.Therefore, the utility model, when upgrading, only needs upgrading smart card system 10 separately, and without display system 20 is upgraded, user only need to pay cheap upgrade cost like this, just can make out-of-date intelligent television upgrade to the intelligent television of the market mainstream.
Please again consult Fig. 1, described smart card system 10 comprises: high-frequency signal modular converter 11, low frequency signal modular converter 12 and signal synthesizing module 13, described high-frequency signal modular converter 11 is connected signal synthesizing module 13 with low frequency signal modular converter 12.Described high-frequency signal modular converter 11 is for being that signal post needs level transmissions to signal synthesizing module 13 by the level conversion of high-frequency signal, low frequency signal modular converter 12 is for being that signal post needs level transmissions to signal synthesizing module 13 by the level conversion of low frequency signal, by signal synthesizing module 13, the signal of high-frequency signal modular converter 11 and 12 outputs of low frequency signal modular converter is synthesized to a kind of signal, make the signal of two kinds of different frequencies can common transmitted passage, realization, by single signal line transmitting two paths of signals, makes the function communicating between two systems.
In the present embodiment, described high-frequency signal and low frequency signal are the signal of two kinds of different frequencies, and the frequency of high-frequency signal is generally M level, the general K level of frequency of low frequency signal.And, the level that high-frequency signal and low frequency signal signal post need revocable level, this level is just prepared for signal synthesizing module 13, and the level of assurance composite signal, in a rational scope, can be realized multiplexed signals line and carry out transfer of data.
Signal synthesizing module 13 carry out signal synthetic after, by holding wire 30, be transferred to display system 20 and carry out signal separation and reduction processing, described display system 20 comprises high-frequency signal separation module 21 and low frequency signal separation module 22, and described signal synthesizing module 13 connects high-frequency signal separation module 21 and low frequency signal separation module 22.
Wherein, described high-frequency signal separation module 21, for the low frequency signal of the composite signal of signal synthesizing module 13 outputs is removed, restores high-frequency signal, and high-frequency signal separation module 21 is removed the low frequency component in composite signal, high-frequency signal is separated, restored out high-frequency signal.Described low frequency signal separation module 22 goes out low frequency signal for the composite signal of signal synthesizing module 13 output is carried out to separating reducing, and low frequency signal separation module 22 carries out signal separating reducing by composite signal and goes out low frequency signal.
See also Fig. 2, it realizes the circuit diagram of the smart card system in the module TV of system communication for the utility model multiplexed signals line.As shown in Figure 2, described high-frequency signal modular converter 11 comprises the first triode Q1, the second triode Q2, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3 and the 4th resistance R 4, and this high-frequency signal modular converter 11 is converted to 0-2V by the level of the high-frequency signal V_H_IN of smart card system 10 outputs from 0-3.3V.
During concrete enforcement, one end of described the first resistance R 1 is the input of high-frequency signal modular converter 11, the high-frequency signal V_H_IN of smart card system 10 outputs is in this first resistance R 1 input high-frequency signal modular converter 11, the other end of the first resistance R 1 connects the base stage of the first triode Q1, the grounded emitter of described the first triode Q1, the collector electrode of the first triode Q1 connects the base stage of the second triode Q2, also by the 4th resistance R 4, connects the first feeder ear V1; The grounded emitter of described the second triode Q2, the collector electrode of the second triode Q2 connects one end of the 3rd resistance R 3, also by the second resistance R 2, connects described the first feeder ear V1; The other end of described the 3rd resistance R 3 is output, the connection signal synthesizing module 13 of high-frequency signal modular converter 11.
Wherein, described the first triode Q1 and the second triode Q2 are NPN triode, and the supply power voltage of the first feeder ear V1 is 2V, and described the second resistance R 2 and the 4th resistance R 4 are pull-up resistor.When the high-frequency signal V_H_IN of input high-frequency signal modular converter 11 is high level, the base stage of described the first triode Q1 is high level, make the first triode Q1 conducting, now the base stage of the second triode Q2 is dragged down and is ended for low level, existence due to the second resistance R 2, the current collection that makes the second triode Q2 is high level very, can not affect the level state of high-frequency signal modular converter 11 output signals, when the high-frequency signal V_H_IN of input high-frequency signal modular converter 11 is low level, the base stage of described the first triode Q1 is low level, make the first triode Q1 become cut-off state from conducting state, existence due to the 4th resistance R 4, the collector electrode of the first triode Q1 can be drawn high, simultaneously, the base stage level of the second triode Q2 also can become high level, the second triode Q2 becomes conducting state from cut-off state, the current collection that makes the second triode Q2 is low level very, thereby the low and high level state of the high-frequency signal V_H_IN of the low and high level state of signal that makes high-frequency signal modular converter 11 output during with input is consistent, and by the resistance of first to fourth resistance is arranged, the signal that makes high-frequency signal modular converter 11 the high-frequency signal V_H_IN of 0-3.3V can be converted to 0-2V is exported to signal synthesizing module 13.
Described low frequency signal modular converter 12 comprises the 3rd triode Q3, the 4th triode Q4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7, the 8th resistance R 8 and the 9th resistance R 9; This low frequency signal modular converter 12 is converted to 0-3V by the level of the low frequency signal V_L_IN of smart card system 10 outputs from 0-3.3V.
During concrete enforcement, one end of described the 5th resistance R 5 is the input of low frequency signal modular converter 12, the low frequency signal V_L_IN of smart card system 10 outputs is in the 5th resistance R 5 input low frequency signal modular converters 12, the other end of the 5th resistance R 5 connects the base stage of the 4th triode Q4, the transmitting collection ground connection of the 4th triode Q4, the collector electrode of the 4th triode Q4 connects the base stage of the 3rd triode Q3, also by the 6th resistance R 6, connects the second feeder ear V2; The grounded emitter of described the 3rd triode Q3, the collector electrode of described the 3rd triode Q3 connects one end of the 8th resistance R 8 and one end of the 9th resistance R 9 by the 7th resistance R 7; The other end of described the 8th resistance R 8 connects described the second feeder ear V2, and the other end of described the 9th resistance R 9 is output, the connection signal synthesizing module 13 of low frequency signal modular converter 12.
Wherein, described the 3rd triode Q3 and the 4th triode Q4 are also NPN triode, and the supply power voltage of the second feeder ear V2 is 3V, and described the 6th resistance R 6, the 7th resistance R 7 and the 8th resistance R 8 are pull-up resistor.When the low frequency signal V_L_IN of input low frequency signal modular converter 12 is high level, the base stage of described the 4th triode Q4 is high level, make the 4th triode Q4 conducting, now the base stage of the 3rd triode Q3 is dragged down and is ended for low level, existence due to the 7th resistance R 7 and the 8th resistance R 8, the current collection that makes the 3rd triode Q3 is high level very, can not affect the level state of low frequency signal modular converter 12 output signals, when the low frequency signal V_L_IN of input low frequency signal modular converter 12 is low level, the base stage of described the 4th triode Q4 is low level, make the 4th triode Q4 become cut-off state from conducting state, existence due to the 6th resistance R 6, the collector electrode of the 4th triode Q4 can be drawn high, simultaneously, the base stage level of the 3rd triode Q3 also can become high level, make the 3rd triode Q3 become conducting state from cut-off state, the current collection that makes the 3rd triode Q3 is low level very, thereby the low and high level state of the low frequency signal V_L_IN of the low and high level state of signal that makes low frequency signal modular converter 21 output during with input is consistent, and by the 5th resistance to the 9th resistance is arranged, make low frequency signal modular converter 12 the low frequency signal V_L_IN of 0-3.3V can be converted to 0-3V and export to signal synthesizing module 13.
Please continue to refer to consulting Fig. 1 and Fig. 2, at multiplexed signals line of the present utility model, realize in the module TV of system communication, described signal synthesizing module 13 comprises the first operational amplifier U1, the tenth resistance R the 10, the 11 resistance R the 1, the 12 resistance R 12 and the 13 resistance R 13.
Described the first operational amplifier U1 adopts the amplifier chip that model is LM107, the tenth resistance R 10 is negative feedback resistor, the other end that described the first operational amplifier U1 inverting input connects described the 3rd resistance R 3 and the other end of the 9th resistance R 9, also by the tenth resistance R 10, be connected the output of the first operational amplifier U1, the normal phase input end of described the first operational amplifier U1 is respectively by the 11 resistance R the 1, the 12 resistance R 12 and the 13 resistance R 13 ground connection, and the output of the first operational amplifier U1 is the output of signal synthesizing module 13.Described signal synthesizing module 13 is that core forms adder calculator by the first operational amplifier U1, the low frequency signal of the high-frequency signal of high-frequency signal modular converter 11 outputs and 12 outputs of low frequency signal modular converter is all inputted the inverting input of the first operational amplifier U1, by the first operational amplifier U1, completed the stack of high and low frequency signal, make high frequency, the synthetic signal of low frequency signal, thereby realize on single signal line, can communicate by letter.
Refer to Fig. 3, wherein, the voltage waveform view that (a) in Fig. 3 is high-frequency signal, the voltage waveform view that (b) in Fig. 3 is low frequency signal, (c) in Fig. 3 is the voltage waveform view of signal synthesizing module after synthetic.As can be seen from Figure 3, the high-frequency signal of 0-3.3V and the low frequency signal of 0-3.3V become the signal of a 0-5V after signal synthesizing module is synthetic, make single signal line can transmit this signal after synthetic.And in composite signal, the signal of 3.3-5V level is high-frequency signal, and the signal of 0-3V is low frequency signal.
Should be noted that, described high-frequency signal modular converter and low frequency signal modular converter can also adopt other electron component to combine, for example: the circuit structure that the first triode Q1, the second triode Q2, the 3rd triode Q3 and the 4th triode Q4 also can adopt NMOS pipe or PNP triode and inverter to form replaces, as long as can realize level conversion function.
At smart card system end, carry out that signal is synthetic to be transferred to after display system end, need to carry out signal separation by display system, and be reduced to the actual signal of high and low frequency, finally complete Presentation Function.Refer to Fig. 1, Fig. 2 and Fig. 4, described low frequency signal separation module 22 comprises the second operational amplifier U2, the 3rd operational amplifier U3, the 5th triode Q5, the 6th triode Q6, diode D1, the 14 electric R14, the 15 resistance R the 15, the 16 resistance R 16 and the 17 resistance R 17.
During concrete enforcement, the normal phase input end of the inverting input of the second operational amplifier U2 and the 3rd operational amplifier U3 be low frequency signal separation module 22 input, by holding wire, be connected the output (i.e. the output of the first operational amplifier U1) of signal synthesizing module 13, the normal phase input end of described the second operational amplifier U2 connects the 3rd feeder ear V3, and the output of the second operational amplifier U2 connects the base stage of the 6th triode Q6 by the 16 resistance R 16; The grounded emitter of the 6th triode Q6, the collector electrode of the 6th triode Q6 connects the base stage of the 5th triode Q5, also by the 17 resistance R 17, connects the 4th feeder ear V4; The grounded emitter of the 5th triode Q5, the collector electrode of the 5th triode Q5 connects one end of the 15 resistance R 15, also by the 14 resistance R 14, connects described the 4th feeder ear V4; The other end of the 15 resistance R 15 is the output of low frequency signal separation module 22; The inverting input of described the 3rd operational amplifier U3 connects the 4th feeder ear V4, and the output of the 3rd operational amplifier U3 is unsettled; The plus earth of described diode D1, the negative pole of diode D1 connects the signal input part (i.e. the 8th end of the second operational amplifier U2) of the second operational amplifier U2 and the signal input part (i.e. the 8th end of the 3rd operational amplifier U3) of the 3rd operational amplifier U3.
Wherein, the voltage of described the 3rd feeder ear V3 is 5V, the voltage of the 4th feeder ear V4 is 3.3V, described the second operational amplifier U2 and the 3rd operational amplifier U3 adopt the amplifier chip that model is LM101, described diode D1 adopts the voltage stabilizing didoe that pressure drop is 2.6V, add the unblocked level of the triode in LM101 amplifier chip, making the level of the second operational amplifier output is 3.3V.In this low frequency signal separation module 22, by the second operational amplifier U2, the 3rd operational amplifier U3 and diode D1 form pressure limiting circuit, when the level of composite signal (being the input signal Vin of low frequency signal separation module 22) is within the scope of 3.3V ~ 5V (this signal is the high-frequency signal in composite signal), the high level that the signal VHout of the second operational amplifier U2 output is 3.3V, now, the 6th triode Q6 conducting, the collector electrode of the 6th triode Q6 is dragged down as low level, make the 5th triode Q5 cut-off, existence due to the 14 resistance R 14, the current collection that makes the 5th triode Q5 is high level very, now the output signal VL_OUT of low frequency signal separation module 22 is high level, when the level of composite signal is during lower than 3.3V (this signal is the low frequency signal in composite signal), the signal VHout of the second operational amplifier U2 output is 0V low level, now the 6th triode Q6 cut-off, the 5th triode Q5 conducting, the output signal VL_OUT that makes low frequency signal separation module 22 is low level, and when the level of composite signal is during at 3.3V ~ 5V, low frequency signal before synthetic is also the high level of 3.3V, level when to detect low frequency signal in composite signal be high by pressure limiting circuit, thereby isolate low frequency signal, make composite signal after this low frequency signal separation module 22, complete low frequency signal restoring function.
Please again consult Fig. 1, Fig. 2 and Fig. 4, described high-frequency signal separation module 21 comprises subtraction unit 211 and level conversion unit 212, the first input end of described subtraction unit 211 connects the other end of the 15 resistance R 15, the second input of described subtraction unit 211 connects the output (i.e. the output of the first operational amplifier U1) of signal synthesizing module 13 by holding wire, the output of described subtraction unit 211 connects level conversion unit 212.By this subtraction unit 211, the low frequency signal in signal synthesizing module 13 is removed, remove the low frequency component in composite signal, high-frequency signal is separated, but signal is now before signal is synthetic, through high-frequency signal modular converter 11, to change the signal of over levels, therefore need to the signal level of subtraction unit 211 outputs be converted to by level conversion unit 212 to the TTL(transistor transistor logic of standard, transistor-transistor logic) level, by level conversion unit 212, the signal of subtraction unit 211 outputs is carried out to level conversion, and be reduced to high-frequency signal.
Owing to being that high-frequency signal and low frequency signal are superposeed when carrying out that signal is synthetic, and be shaped as the signal of 0-5V, carrying out signal when synthetic, by the reference level of high-frequency signal is drawn high, when the level of low frequency signal is while being high, the value after the high level conversion that the reference level of high-frequency signal is low frequency signal; When low frequency signal is low level, reference level has been just ground (in composite signal, the signal of 3.3-5V is high-frequency signal, the signal of 0-3.3V is low frequency signal), therefore, carrying out when signal is synthetic being equivalent to do add operation, so when carrying out high-frequency signal separation, the utility model adopts and in input signal Vin, deducts separated low frequency signal, thereby obtains high-frequency signal.
During concrete enforcement, describedly state the four-operational amplifier U4 that subtraction unit 211 comprises, the 18 resistance R 18, the 19 resistance R 19, the 20 resistance R 20 and the 21 resistance R 21, the inverting input of described four-operational amplifier U4 connects one end of the 18 resistance R 18, also by the 20 resistance R 20, connect the output of four-operational amplifier U4, the other end of described the 18 circuit is the first input end of subtraction unit 211, the other end that connects the 15 resistance, the normal phase input end of four-operational amplifier U4 connects one end of the 19 resistance R 19, also by the 21 resistance R 21 ground connection, the other end of described the 19 resistance R 19 be the second input of subtraction unit 211, the inverting input that connects the second operational amplifier U2 with the normal phase input end of the 3rd operational amplifier U3, is also connected signal synthesizing module 13 by holding wire, the output of described four-operational amplifier U4 is output, the connection level conversion unit 212 of subtraction unit 211.
In the present embodiment, four-operational amplifier U4 adopts the amplifier chip that model is LM107, and the 18 resistance R 18 equates with the resistance of the 19 resistance R 19, the 20 resistance R 20 equates with the resistance of the 21 resistance R 21.The signal VL_OUT of low frequency signal separation module 22 outputs enters the inverting input of four-operational amplifier U4, this signal of input signal Vin(that display system 20 receives is the output signal Vout of signal synthesizing module 13) enter the normal phase input end of four-operational amplifier U4, after subtraction unit 211 carries out subtraction, remove the low frequency component in composite signal, high-frequency signal is separated.
Wherein, described level conversion unit 212 comprises the 7th triode Q7, the 8th triode Q8, the 22 resistance R the 22, the 23 resistance R the 23, the 24 resistance R the 24, the 25 resistance R the 25, the 26 resistance R 26 and the 27 resistance R 27, and described the 7th triode Q7 and the 8th triode Q8 also adopt NPN triode.
The base stage of described the 7th triode Q7 connects the output of four-operational amplifier U4 by the 22 resistance R 22, also by the 23 resistance R 23 ground connection, the grounded emitter of the 7th triode Q7, the collector electrode of the 7th triode Q7 connects the 4th feeder ear V4 by the 24 resistance R 24, also by the 25 resistance R 25, connect the 8th base stage of triode Q8 and one end of the 27 resistance R 27, the equal ground connection of the other end of the emitter of the 8th triode Q8 and the 27 resistance R 27, the current collection of the 8th triode Q8 is the output of high-frequency signal separation module 21 very, by the 26 resistance R 26, connect the 4th feeder ear V4.
In this level conversion unit 212, when the high-frequency signal of four-operational amplifier U4 output is high level, the 7th triode Q7 conducting, the collector electrode of the 7th triode Q7 is dragged down as low level, the base stage that makes the 8th triode Q8 is that low level is ended, the signal VH_OUT of now level conversion unit 212 outputs is 3.3V high level, when the high-frequency signal of four-operational amplifier U4 output is low level, the 7th triode Q7 cut-off, existence due to the 24 resistance R 24, the collector electrode that makes the 7th triode Q7 by draw as high level, make the base stage of the 8th triode Q8 become high level and conducting, the signal VH_OUT of now level conversion unit 212 outputs is 0V low level, itself and input signal (being the high-frequency signal of the level conversion of input high-frequency signal) are consistent, the work of settling signal reduction.
In display system, the level when pressure limiting circuit that the utility model consists of the second operational amplifier U2, the 3rd operational amplifier U3 and diode detects low frequency signal in composite signal and is high level, thereby isolate low frequency signal, by four-operational amplifier U4, deduct the low frequency signal in composite signal afterwards, obtain the high-frequency signal that level conversion is crossed, then by level conversion unit 212, carry out level conversion and restore real high-frequency signal.
Should be noted that, described high-frequency signal separation module and low frequency signal separation module can also adopt other electron component to combine, for example: the circuit structure that the 5th triode Q5, the 6th triode Q6, the 7th triode Q7 and the 8th triode Q8 also can adopt NMOS pipe or PNP triode and inverter to form replaces, as long as can realize signal separation and signal restoring function.
Refer to Fig. 5, wherein, voltage waveform view when (A) in Fig. 5 is input display system, (B) in Fig. 5 is the voltage waveform view of the high-frequency signal after the separation of high-frequency signal separation module, and (C) in Fig. 5 is the voltage waveform view of low frequency signal after the separation of low frequency signal separation module.The signal of inputting as can be seen from Figure 5 display system 0-5V by high-frequency signal separation module and low frequency signal separation module, undertaken signal separated after, the high-frequency signal of 0-3.3V of itself and input high-frequency signal modular converter and the low frequency signal of the 0-3.3V of input low frequency signal modular converter be consistent, thereby realized multiplexed signals line, realize communicating by letter between smart card system 10 and display system 20.
Compared with prior art, the utility model takes full advantage of the existing interface of TV, do not changing on the basis of device shaped, realize low frequency signal and high-frequency signal common transmitted passage and realized communicating by letter between smart card system and display system, greatly reduced interface quantity, to a great extent for having reduced the quantity of communication interface holding wire.And the utility model adopted less electronic component, the area that takies pcb board is little, and cost is low, compared with prior art for complete machine, has saved cost, has promoted the market competitiveness.
Be understandable that; for those of ordinary skills; can be equal to replacement or change according to the technical solution of the utility model and utility model design thereof, and all these changes or replacement all should belong to the protection range of the appended claim of the utility model.
Claims (8)
1. multiplexed signals line is realized a module TV for system communication, it is characterized in that, comprises smart card system and display system, and described smart card system is connected by holding wire with display system;
Described smart card system comprises:
Being used for is the high-frequency signal modular converter that signal post needs level by the level conversion of high-frequency signal;
Being used for is the low frequency signal modular converter that signal post needs level by the level conversion of low frequency signal;
For the signal of high-frequency signal modular converter and the output of low frequency signal modular converter is synthesized to a kind of signal, realize the signal synthesizing module of being communicated by letter by single signal line;
Described display system comprises:
For the low frequency signal of the composite signal of signal synthesizing module output is removed, restore the high-frequency signal separation module of high-frequency signal;
For the composite signal of signal synthesizing module output is carried out to the low frequency signal separation module that separating reducing goes out low frequency signal;
Described high-frequency signal modular converter is connected signal synthesizing module with low frequency signal modular converter, and described signal synthesizing module connects high-frequency signal separation module and low frequency signal separation module.
2. multiplexed signals line according to claim 1 is realized the module TV of system communication, it is characterized in that, described high-frequency signal modular converter comprises the first triode, the second triode, the first resistance, the second resistance, the 3rd resistance and the 4th resistance, one end of described the first resistance is the input of high-frequency signal modular converter, the other end of the first resistance connects the base stage of the first triode, the grounded emitter of described the first triode, the collector electrode of the first triode connects the base stage of the second triode, also by the 4th resistance, connects the first feeder ear; The grounded emitter of described the second triode, the collector electrode of the second triode connect the 3rd resistance one end, also by the second resistance, connect described the first feeder ear; The other end of described the 3rd resistance is output, the connection signal synthesizing module of high-frequency signal modular converter.
3. multiplexed signals line according to claim 2 is realized the module TV of system communication, it is characterized in that, described low frequency signal modular converter comprises: the 3rd triode, the 4th triode, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance and the 9th resistance; One end of described the 5th resistance is the input of low frequency signal modular converter, the other end of the 5th resistance connects the base stage of the 4th triode, the transmitting collection ground connection of the 4th triode, the collector electrode of the 4th triode connect the 3rd triode base stage, also by the 6th resistance, connect the second feeder ear; The transmitting collection ground connection of described the 3rd triode, the collector electrode of described the 3rd triode connects one end of the 8th resistance and one end of the 9th resistance by the 7th resistance; The other end of described the 8th resistance connects described the second feeder ear, and the other end of described the 9th resistance is output, the connection signal synthesizing module of low frequency signal modular converter.
4. multiplexed signals line according to claim 3 is realized the module TV of system communication, it is characterized in that, described signal synthesizing module comprises the first operational amplifier, the tenth resistance, the 11 resistance, the 12 resistance and the 13 resistance; The other end that described the first operational amplifier inverting input connects described the 3rd resistance and the other end of the 9th resistance, also by the tenth resistance, be connected the output of the first operational amplifier, the normal phase input end of described the first operational amplifier passes through respectively the 11 resistance, the 12 resistance and the 13 grounding through resistance, the output that the output of the first operational amplifier is signal synthesizing module.
5. multiplexed signals line according to claim 1 is realized the module TV of system communication, it is characterized in that, low frequency signal separation module comprises the second operational amplifier, the 3rd operational amplifier, the 5th triode, the 6th triode, diode, the 14 resistance, the 15 resistance, the 16 resistance and the 17 resistance; The normal phase input end of the inverting input of the second operational amplifier and the 3rd operational amplifier be low frequency signal separation module input, by holding wire, be connected the output of signal synthesizing module, the normal phase input end of described the second operational amplifier connects the 3rd feeder ear, and the output of the second operational amplifier connects the base stage of the 6th triode by the 16 resistance; The grounded emitter of the 6th triode, the collector electrode of the 6th triode connects the base stage of the 5th triode, also by the 17 resistance, connects the 4th feeder ear; The grounded emitter of the 5th triode, the collector electrode of the 5th triode connect the 15 resistance one end, also by the 14 resistance, connect described the 4th feeder ear; The other end of the 15 resistance is the output of low frequency signal separation module; The inverting input of described the 3rd operational amplifier connects the 4th feeder ear, and the output of the 3rd operational amplifier is unsettled; The plus earth of described diode, the negative pole of diode connects the signal input part of the second operational amplifier and the signal input part of the 3rd operational amplifier.
6. multiplexed signals line according to claim 5 is realized the module TV of system communication, it is characterized in that, described high-frequency signal separation module comprises:
For the subtraction unit that the low frequency signal of signal synthesizing module is removed;
For the signal of subtraction unit output is carried out to the level conversion unit that level conversion is reduced to high-frequency signal;
The first input end of described subtraction unit connects the other end of the 15 resistance, and the second input of described subtraction unit connects the output of signal synthesizing module by holding wire, and the output of described subtraction unit connects level conversion unit.
7. multiplexed signals line according to claim 6 is realized the module TV of system communication, it is characterized in that, the four-operational amplifier that described subtraction unit comprises, the 18 resistance, the 19 resistance, the 20 resistance and the 21 resistance, the inverting input of described four-operational amplifier connects one end of the 18 resistance, also by the 20 resistance, connect the output of four-operational amplifier, the other end of described the 18 circuit connects the other end of the 15 resistance, the normal phase input end of four-operational amplifier connects one end of the 19 resistance, also by the 21 grounding through resistance, the inverting input that the other end of described the 19 resistance connects the second operational amplifier is with the normal phase input end of the 3rd operational amplifier, be also connected signal synthesizing module by holding wire, the output of described four-operational amplifier be subtraction unit output, connect level conversion unit.
8. multiplexed signals line according to claim 7 is realized the module TV of system communication, it is characterized in that, described level conversion unit comprises the 7th triode, the 8th triode, the 22 resistance, the 23 resistance, the 24 resistance, the 25 resistance, the 26 resistance and the 27 resistance, the base stage of described the 7th triode connects the output of four-operational amplifier by the 22 resistance, also by the 23 grounding through resistance, the grounded emitter of the 7th triode, the collector electrode of the 7th triode connects the 4th feeder ear by the 24 resistance, also by the 25 resistance, connect the 8th base stage of triode and one end of the 27 resistance, the equal ground connection of the other end of the emitter of the 8th triode and the 27 resistance, the current collection of the 8th triode is the output of high-frequency signal separation module very, by the 26 resistance, connect the 4th feeder ear.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420348909.1U CN203933868U (en) | 2014-06-27 | 2014-06-27 | Multiplexed signals line is realized the module TV of system communication |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420348909.1U CN203933868U (en) | 2014-06-27 | 2014-06-27 | Multiplexed signals line is realized the module TV of system communication |
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| CN203933868U true CN203933868U (en) | 2014-11-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109302635A (en) * | 2018-10-16 | 2019-02-01 | 深圳Tcl新技术有限公司 | The shared transmission circuit and television set of HDMI signal wire and control line |
-
2014
- 2014-06-27 CN CN201420348909.1U patent/CN203933868U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109302635A (en) * | 2018-10-16 | 2019-02-01 | 深圳Tcl新技术有限公司 | The shared transmission circuit and television set of HDMI signal wire and control line |
| CN109302635B (en) * | 2018-10-16 | 2022-06-10 | 深圳Tcl新技术有限公司 | Shared transmission circuit of HDMI signal line and control line and television |
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| Date | Code | Title | Description |
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| 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: 20141105 Termination date: 20200627 |