CN203661184U - Multi-standard tuner having broadband radio frequency input loop addition output function - Google Patents
Multi-standard tuner having broadband radio frequency input loop addition output function Download PDFInfo
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Abstract
The utility model discloses a multi-standard tuner having a broadband radio frequency input loop addition output function. The multi-standard tuner comprises an RF input end, an RF output end, a first tuning unit, a second tuning unit and a third tuning unit. The first tuning unit is formed by first-to-fourth radio frequency preprocessing modules. The RF input end is used for input of broadband radio frequency digital television signals. The RF output end is a loop output end. The multi-standard tuner can support multiple digital television transmission standards such as DVB-T, DVB-C, ISDB-T, DVB-S and DVB-S2 with the same channel, is characterized by single-path input, high reliability, good product performance, good anti-interference performance and high compatibility and has the loop output function.
Description
Technical field
The utility model relates to and a kind ofly has wide band radio-frequency input and add the multi-modulation scheme tuner that encircles output function.
Background technology
The basic function of digital TV receiving system is to receive the digital television signal that operating frequency is 50MHz-860MHz, and Japanese digital TV receiving system is to receive the digital television signal that operating frequency is 90MHz-770MHz, digital TV receiving system receives and has comprised Japanese digital TV receiving system.This digital signal is imported in tuner through feeder line, tuner is subject to receiver control, from the signal in this broadband, select an individual passage, by processing such as amplification, frequency conversion and demodulation, the motherboard of sending into again in Set Top Box carries out Voice & Video processing, and final output audio and vision signal are used for miscellaneous equipment.And the digital satellite television signal that the operating frequency that satellite antenna frequency demultiplier transmits is 950MHz-2150MHz, this signal imports in tuner through feeder line, from this digital satellite signal, select a program frequencies, through processing such as frequency conversion and demodulation, send into again motherboard in Set Top Box and carry out Voice & Video and process, finally export analogue audio frequency and vision signal is used for miscellaneous equipment.
In the prior art, ground digital tuner just can be realized and support multiple types of floors digital television transfer standard separately, comprising multiple digital television transmission standards such as DVB-T, DVB-C, ISDB-T; Separately digital satellite tuner can receive SD digital satellite television signal DVB-S, and can compatible high-definition digital satellite TV signal DVB-S2 etc. digital satellite television transmission standard.
For possessing the independent tuner of loop output function, one end is receiving digital television signal, and the other end has loop output function, can be regarded as paid end useful signal is done to two merit parallel circuits, can distribute to another one tuner by another port and use.
Along with the constantly development of science and technology, the tuner of digital terrestrial television and digital satellite television unification engenders, be exactly respectively an independent ground digital tuner and an independent digital satellite tuner to be passed through to receiving port separately, all be made in a tuner, although it both can realize reception digital terrestrial television signals, can receive again digital satellite television signal, but general this assembly type tuner volume is larger.This assembly type tuner can be worked by compatible both digital television signals in same tuner, due to the operating frequency difference of both digital television signals, need to use separately different passages to realize.For the tuner of this assembly type, it does not have loop output function, also has following some difficulty:
1, general tuner is to use two ports, and one of them port is realized digital terrestrial television or digital satellite television reception signal as receiving, and an other port is as loop output.For above-mentioned said assembly type tuner, two ports need to use separately different passages to realize and receive digital terrestrial television signals and digital satellite television signal, also need additionally to increase a port and do loop output function, Frame Design need remodify so, and difficulty can increase.
2, because the reception operating frequency of digital terrestrial television and digital satellite television is different, if jointly coming to realize digital terrestrial television and digital satellite television reception signal with a passage, just must overcome the phase mutual interference of its both input channel.
The loop output function that 3, will realize independent tuner is fairly simple, can realize with two merit parallel circuits, but the reception that will simultaneously realize digital terrestrial television and digital satellite television also exists some difficulties to overcome.Because the reception operating frequency of digital terrestrial television and digital satellite television is different, both realize loop output separately with two merit parallel circuits respectively, also need afterwards two-way loop output synthetic passage output again, like this, need to again overcome the phase mutual interference of its both input channel.
Utility model content
Technical problem to be solved in the utility model is: provide a kind of and have wide band radio-frequency input and add the multi-modulation scheme tuner that encircles output function, can realize the reception & disposal of the digital television signal of the multiple transmission standards such as ground, wired and satellite digital TV.
Solve the problems of the technologies described above, the technical scheme that the utility model adopts is as follows:
A kind of have wide band radio-frequency input and add the multi-modulation scheme tuner that encircles output function, it is characterized in that: described tuner comprises RF input, RF output, the first tuned cell, second tune unit and the 3rd tuned cell, and described the first tuned cell is made up of first to fourth radio frequency pretreatment module; Described RF input is for access band radio-frequency (RF) digital TV signal, described the first radio frequency pretreatment module carries out to the wide band radio-frequency digital television signal of access the signal that after two merit divisional processing, filtering output two-way is isolated mutually respectively, first via signal is that operating frequency is the digital television signal of 50MHz-860MHz, and it is undertaken being input to respectively described the second radio frequency pretreatment module and second tune unit after High frequency amplification processing by the 3rd radio frequency pretreatment module; The second road signal is that operating frequency is the digital satellite television signal of 950MHz-2150MHz, and it is undertaken being input to respectively described the second radio frequency pretreatment module and the 3rd tuned cell after High frequency amplification processing by the 4th radio frequency pretreatment module; Described the second radio frequency pretreatment module reconsolidates into wide band radio-frequency digital television signal by the signal of input and exports via described RF output, described second tune unit and the 3rd tuned cell are subject to respectively outside telecast demanding signal controlling, from the signal of input, choose the digital television signal of respective program frequency, be demodulated into the compound digital baseband signal output of audio frequency and video.
As a kind of execution mode of the present utility model, described second tune unit comprises the 5th radio frequency pretreatment module and down-converted module; The signal of described input second tune unit is inputted down-converted module after the 5th radio frequency pretreatment module filtering, and described down-converted module is passed through I
2c bus receives described telecast demanding signal, and is to be applicable to the output of the Low Medium Frequency signal of outside demodulation module by the digital television signal frequency conversion of the respective program frequency of selecting.
As a kind of execution mode of the present utility model, the 3rd described tuned cell comprises the 6th radio frequency pretreatment module and zero intermediate frequency processing module; The signal of described input the 3rd tuned cell is inputted zero intermediate frequency processing module after the 6th radio frequency pretreatment module filtering, and described zero intermediate frequency processing module is passed through I
2c bus receives described telecast demanding signal, and is to be applicable to the output of the i/q signal of outside demodulation module by the digital television signal frequency conversion of the respective program frequency of selecting.
Wherein, any one in the ground digital television signal that described first via signal comprises DVB-T standard and ISDB-T standard and the digital catv signal of DVB-C standard or more than.
Any one in the SD digital satellite television signal that the second described road signal comprises DVB-S standard and the high-definition digital satellite TV signal of DVB-S2 standard or more than.
Compared with prior art, the utlity model has following beneficial effect:
The utility model is provided with the first tuned cell of being made up of first to fourth radio frequency pretreatment module and for the treatment of ground, the second tune unit of digital catv signal, for the treatment of high definition, the 3rd tuned cell of SD satellite digital television signal, the first tuned cell is by processing the wide band radio-frequency digital television signal of inputting from this single channel of RF input, realize the ground of 50MHz-860MHz, the digital satellite television signal of digital catv signal and 950MHz-2150MHz separate output, and by the second radio frequency pretreatment module, this two paths of signals reconsolidated into wide band radio-frequency digital television signal and export via RF output, second tune unit and the 3rd tuned cell can be subject to respectively outside telecast demanding signal controlling, from the signal of input, choose the digital television signal of respective program frequency, be demodulated into the compound digital baseband signal output of audio frequency and video, therefore, the utility model can be realized and be supported DVB-T by same channel, DVB-C, ISDB-T, DVB-S, the multiple digital television transmission standards such as DVB-S2, there is single channel input, reliability is high, good product performance, strong interference immunity, compatible strong feature, and can possess loop output function.
Brief description of the drawings
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
Fig. 1 is schematic block circuit diagram of the present utility model;
Fig. 2 is signal processing flow figure of the present utility model.
Embodiment
As depicted in figs. 1 and 2, of the present utility model have wide band radio-frequency input and add the multi-modulation scheme tuner that encircles output function, comprises RF input A, RF output B, the first tuned cell 1, second tune unit 2 and the 3rd tuned cell 3.
RF input A of the present utility model is for access band radio-frequency (RF) digital TV signal, the first tuned cell 1 is made up of first to fourth radio frequency pretreatment module, the first radio frequency pretreatment module carries out to the wide band radio-frequency digital television signal of access the signal that after two merit divisional processing, filtering output two-way is isolated mutually respectively, first via signal is that operating frequency is the digital television signal of 50MHz-860MHz, its can comprise in the ground digital television signal of DVB-T standard and ISDB-T standard and the digital catv signal of DVB-C standard any one or more than, first via signal is undertaken being input to respectively the second radio frequency pretreatment module and second tune unit 2 after High frequency amplification processing by the 3rd radio frequency pretreatment module, the second road signal is that operating frequency is the digital satellite television signal of 950MHz-2150MHz, its can comprise in the SD digital satellite television signal of DVB-S standard and the high-definition digital satellite TV signal of DVB-S2 standard any one or more than, the second road signal is undertaken being input to respectively the second radio frequency pretreatment module and the 3rd tuned cell 3 after High frequency amplification processing by the 4th radio frequency pretreatment module, the second radio frequency pretreatment module reconsolidates into wide band radio-frequency digital television signal by the signal of input and exports via RF output B.
The first above-mentioned radio frequency pretreatment module can adopt after inductance in parallel, the different receive frequency processing of carrying out respectively at same channel, isolate output by inductance and capacitances in series with the filter circuit forming in parallel; The second radio frequency pretreatment module can adopt different channels to carry out after inductance and capacitances in series and the filter circuit forming in parallel, then composes in parallel and be merged into same channel and export as loop with inductance; The 3rd radio frequency pretreatment module can adopt the filter circuit of inductance and Capacitance parallel connection composition and the amplifying circuit of low noise radio frequency triode composition; The 4th radio frequency pretreatment module can adopt filter circuit that inductance, electric capacity and resistance composes in parallel and the amplifying circuit of low noise radio frequency triode composition.
Second tune of the present utility model unit 2 comprises the 5th radio frequency pretreatment module and down-converted module; The signal of input second tune unit 2 is inputted down-converted module after the 5th radio frequency pretreatment module filtering, and down-converted module is passed through I
2c bus is connected with the first demodulation module of external piloting control machine processed, the telecast demanding signal sending by this first demodulation module to receive master controller, down-converted module is subject to this telecast demanding signal controlling, from the signal of input, choose the digital television signal of respective program frequency, and be that the Low Medium Frequency signal that is applicable to the first demodulation module is exported to the first demodulation module by its frequency conversion, to be demodulated into the compound digital baseband signal of audio frequency and video.
The 5th above-mentioned radio frequency pretreatment module can adopt inductance and capacitances in series and be parallel to the filter circuit forming in line capacitance; It is the Low Medium Frequency IC of NM130 that down-converted module can be selected model, it can realize the processing that the control of RF automatic gain, radio frequency amplification, mixing, mixing amplification, channel filtering and Low Medium Frequency amplify to ground and cabled digital radiofrequency signal, and export Low Medium Frequency signal, by the first demodulation module (DVB-T/C/ISDB-T) in master board, Low Medium Frequency signal is carried out to demodulation, the Low Medium Frequency output of down-converted module, Low Medium Frequency automatic gain control end, I
2c bus is connected with the corresponding port of the first demodulation module (DVB-T/C/ISDB-T) in master board.
The 3rd tuned cell 3 of the present utility model comprises the 6th radio frequency pretreatment module and zero intermediate frequency processing module; Input the signal of the 3rd tuned cell 3 and input zero intermediate frequency processing module after the 6th radio frequency pretreatment module filtering, zero intermediate frequency processing module is passed through I
2c bus is connected with the second demodulation module of external piloting control machine processed, the telecast demanding signal sending by this second demodulation module to receive master controller, zero intermediate frequency processing module is subject to this telecast demanding signal controlling, from the signal of input, choose the digital television signal of respective program frequency, and be to be applicable to the i/q signal of the second demodulation module to export to the second demodulation module by its frequency conversion, to be demodulated into the compound digital baseband signal of audio frequency and video.
The 6th above-mentioned radio frequency pretreatment module can adopt the filter circuit of inductance and Capacitance parallel connection composition; It is the zero intermediate frequency IC of RDA5815S that zero intermediate frequency processing module can be selected model, and it can carry out zero intermediate frequency processing to high definition and SD satellite digital TV radiofrequency signal, and exports i/q signal; By the second demodulation module (DVB-S/S2) in master board, i/q signal is carried out to demodulation, the i/q signal output port of zero intermediate frequency processing module connects the i/q signal input port of the second demodulation module (DVB-S/S2) in master board, the automatic gain control inputs port of zero intermediate frequency processing module connects the automatic gain control output end mouth of the second demodulation module (DVB-S/S2) in master board, the I of zero intermediate frequency processing module
2c bus port connects the second demodulation module (DVB-S/S2) I in master board
2c bus port.
Realize the broadcasting of digital television program, the utility model tuner need receive the telecast demanding signal of being exported by master controller, the compound digital baseband signal of audio frequency and video of its output need be realized audio frequency by the decoder module in master controller, vision signal decoding is processed, operation principle of the present utility model for convenience of description, the connected mode of decoder module in simple declaration the utility model tuner and master controller below: utility model tuner can export Low Medium Frequency signal and i/q signal is connected respectively to the first demodulation module (DVB-T/C/ISDB-T) and the corresponding connectivity port of the second demodulation module (DVB-S/S2) in master board, I
2the output in parallel of C bus port is connected respectively to the I of demodulation module in master board
2c bus port, the mistake instruction port of the demodulation module in master board, parallel data stream output port, data flow clock port, reseting port, I
2c bus port, synchronous signal port is connected to the corresponding port of decoder module in master controller respectively.
Below in conjunction with the signal processing flow figure of the present utility model shown in Fig. 2, the operation principle of the utility model tuner is described as follows:
As shown in Figure 2, ground and cable TV signal and digital satellite television signal are from the RF input A input of the utility model tuner, through the first radio frequency pretreatment module, this module is carried out two merits effectively to digital television radio-frequency signal and is divided isolation output, first radiofrequency signal is after inductance in parallel, the different receive frequency processing of carrying out respectively at same channel, isolate output by inductance and capacitances in series with the filter circuit forming in parallel, digital television radio-frequency signal is after two merit parallel circuits separate, export respectively ground and cable TV signal and digital satellite signal.
Ground and cable television digital radiofrequency signal are exported from an output port of the first radio frequency pretreatment module, then be connected to the 3rd radio frequency pretreatment module, ground and cabled digital radiofrequency signal are by the filter circuit being made up of inductance and electric capacity, after radiofrequency signal being amplified through low noise triode again, be divided into two paths of signals output, one road is connected to the 5th radio frequency pretreatment module, and the second radio frequency pretreatment module is received on an other road.Ground and cabled digital radiofrequency signal are by after the 5th radio frequency pretreatment module, again carry out filtering processing effectively through the filter circuit being formed by inductance and electric capacity, then be connected to down-converted module, this module adopts integrated level high, the IC NM130 that performance is good, has also comprised rf gain control end, Low Medium Frequency gain control input, Low Medium Frequency signal output part, Low Medium Frequency amplification module, serial clock input, serial data input.In this module, ground and cabled digital radiofrequency signal are first carried out radio frequency amplification, wherein this module can realize the Gain Automatic regulating and controlling of RF, radio frequency carries out smear after amplifying, smear is amplified and channel filter, output Low Medium Frequency signal, again Low Medium Frequency signal is amplified, realize Low Medium Frequency output, be connected to the first demodulation module (DVB-T/C/ISDB-T) in master board.Interface in master board between the first demodulation module (DVB-T/C/ISDB-T) and master controller, comprises serial/parallel row data flow, data flow clock, synchronizing signal, reset signal, I
2c bus and miscue signal.Wherein in master board, the automatic gain control port of the first demodulation module (DVB-T/C/ISDB-T) is connected with IC NM130 gain control end mouth, forms feedback network, realizes automatic gain control.Then in master board, the first demodulation module (DVB-T/C/ISDB-T) is demodulated into data flow output Low Medium Frequency signal, being connected to the decoder module that master controller includes decodes, pass through again Voice & Video processing, last output audio and video-out port.Master controller decoder module is connected with the first demodulation module (DVB-T/C/ISDB-T) in master board, can pass through the I of master controller decoder module
2c bus control command, start the first demodulation module (DVB-T/C/ISDB-T), the frequency of being selected to need again demodulation by the I2C bus of the first demodulation module (DVB-T/C/ISDB-T) and down-converted module from radiofrequency signal, reaches the effect of arbitrarily watching different frequency.
Export digital satellite television signal from another output port of the first radio frequency pretreatment module, then be connected to the 4th radio frequency pretreatment module, digital satellite signal carries out the filter circuit of inductance and electric capacity composition, through low noise triode, digital satellite RF signal is amplified again, after amplification, be divided into two paths of signals output, one road is connected to the 6th radio frequency pretreatment module, and the second radio frequency pretreatment module is received on an other road.Digital satellite radiofrequency signal, by after the 6th radio frequency pretreatment module, is carried out filtering processing effectively through the filter circuit being made up of inductance and electric capacity again, is then connected to zero intermediate frequency processing module.Zero intermediate frequency processing module has adopted integrated level high, the zero intermediate frequency IC that the model that performance is good is RDA5815S, this module has comprised rf gain control input end, zero intermediate frequency gain control input, zero intermediate frequency signals output, zero intermediate frequency amplification module, serial clock input, serial data input.In this module, radiofrequency signal is carried out radio frequency amplification again, and through mixing, filtering and amplification, output can be exchanged into the available i/q signal of the second demodulation module (DVB-S/S2) in master board, then is input to the second demodulation module (DVB-S/S2).Interface in master board between the second demodulation module (DVB-S/S2) and master controller, comprises serial/parallel row data flow, data flow clock, synchronizing signal, reset signal, I
2c bus and miscue signal.In master board, the automatic gain control port of the second demodulation module (DVB-S/S2) is connected with zero intermediate frequency IC RDA5815S gain control end mouth, forms feedback network, realizes automatic gain control.In master board, the second demodulation module (DVB-S/S2) can be demodulated into available i/q signal data flow output, then data flow output is connected to the decoder module that master controller includes and decodes, pass through again master controller to Voice & Video processing, be finally connected to Voice & Video output port.Master controller decoder module is connected with the second demodulation module (DVB-S/S2), can pass through the I of master controller decoder module
2c bus control command, starts the second demodulation module (DVB-S/S2) in master board, then by the I of the second demodulation module (DVB-S/S2)
2c bus and zero intermediate frequency processing module select to need the frequency of demodulation from radiofrequency signal, reach the effect of arbitrarily watching different frequency.
Ground and cabled digital radiofrequency signal are connected to the second radio frequency pretreatment module after the 3rd radio frequency pretreatment module; Digital satellite radiofrequency signal is connected to the second radio frequency pretreatment module after the 4th radio frequency pretreatment module, both radiofrequency signals are respectively after the filter circuit being made up of inductance and electric capacity, synthesize same channel by inductance in parallel and export as loop, be then connected to RF output B.Can be connected to by the radiofrequency signal of RF output B the tuner of other types, then carry out above-mentioned illustrated principle, realize loop output function.
The receiving of DVB-S/S2 and DVB-T/C/ISDB-T is all to pass through I by rear class master board decoder module
2the total line traffic control of C, its process is as follows: after the tuner electrification reset of master board and this project, send control command by the people of TV reception by man-machine interface to main control computer, select corresponding program receiving source, do corresponding program searching.
In the time watching the TV programme of DVB-S/S2 and DVB-T/C/ISDB-T, received dtv signal RF input A, when master board is received after operational order, the I of master controller decoder module
2c bus is sent control command to the corresponding demodulation module in its master board, starts corresponding demodulation module, and then the corresponding demodulation module in master board passes through I
2c bus is sent control command to down-converted module or zero intermediate frequency processing module, starts down-converted module or zero intermediate frequency processing module.Select to need channel or the frequency of demodulation from signal source.Instruction arranges the channel filter in down conversion module by serial clock terminal SCL and serial data end SDA, down conversion module can regulate intermediate-frequency gain automatically, output Low Medium Frequency signal is to interior the first demodulation module (DVB-T/C/ISDB-T) of master board, the first demodulation module (DVB-T/C/ISDB-T) is demodulated into data flow output Low Medium Frequency signal, being connected to the decoder module that master controller includes decodes, pass through again Voice & Video processing, last output audio and video-out port.By being connected to television set, carry out paid ground and the cable digital TV program watched.Equally, instruction arranges corresponding frequency in zero intermediate frequency module by serial clock terminal SCL and serial data end SDA and carries out mixing, in zero intermediate frequency module and master board, the second demodulation module (DVB-S/S2) can be realized and automatically regulate zero intermediate frequency gain to control, export available i/q signal to the second demodulation module (DVB-S/S2), the second demodulation module (DVB-S/S2) is demodulated into data flow output available i/q signal, then being connected to master controller decoder module decodes, output is connected to the Voice & Video output port of master controller, by being connected to television set, carry out the paid DVB-S/S2 TV programme of watching.
The utility model does not limit to and above-mentioned embodiment; according to foregoing; according to ordinary skill knowledge and the customary means of this area; do not departing under the above-mentioned basic fundamental thought of the utility model prerequisite; the utility model can also be made equivalent modifications, replacement or the change of other various ways, all drops among protection range of the present utility model.
Claims (5)
1. one kind has wide band radio-frequency input and adds the multi-modulation scheme tuner that encircles output function, it is characterized in that: described tuner comprises RF input (A), RF output (B), the first tuned cell (1), second tune unit (2) and the 3rd tuned cell (3), and described the first tuned cell (1) is made up of first to fourth radio frequency pretreatment module; Described RF input (A) is for access band radio-frequency (RF) digital TV signal, described the first radio frequency pretreatment module carries out to the wide band radio-frequency digital television signal of access the signal that after two merit divisional processing, filtering output two-way is isolated mutually respectively, first via signal is that operating frequency is the digital television signal of 50MHz-860MHz, and it is undertaken being input to respectively described the second radio frequency pretreatment module and second tune unit (2) after High frequency amplification processing by the 3rd radio frequency pretreatment module; The second road signal is that operating frequency is the digital satellite television signal of 950MHz-2150MHz, and it is undertaken being input to respectively described the second radio frequency pretreatment module and the 3rd tuned cell (3) after High frequency amplification processing by the 4th radio frequency pretreatment module; Described the second radio frequency pretreatment module reconsolidates into wide band radio-frequency digital television signal by the signal of input and exports via described RF output (B), described second tune unit (2) and the 3rd tuned cell (3) are subject to respectively outside telecast demanding signal controlling, from the signal of input, choose the digital television signal of respective program frequency, be demodulated into the compound digital baseband signal output of audio frequency and video.
2. multi-modulation scheme tuner according to claim 1, is characterized in that: described second tune unit (2) comprises the 5th radio frequency pretreatment module and down-converted module; The signal of described input second tune unit (2) is inputted down-converted module after the 5th radio frequency pretreatment module filtering, and described down-converted module is passed through I
2c bus receives described telecast demanding signal, and is to be applicable to the output of the Low Medium Frequency signal of outside demodulation module by the digital television signal frequency conversion of the respective program frequency of selecting.
3. multi-modulation scheme tuner according to claim 1 and 2, is characterized in that: the 3rd described tuned cell (3) comprises the 6th radio frequency pretreatment module and zero intermediate frequency processing module; The signal of described input the 3rd tuned cell (3) is inputted zero intermediate frequency processing module after the 6th radio frequency pretreatment module filtering, and described zero intermediate frequency processing module is passed through I
2c bus receives described telecast demanding signal, and is to be applicable to the output of the i/q signal of outside demodulation module by the digital television signal frequency conversion of the respective program frequency of selecting.
4. multi-modulation scheme tuner according to claim 1 and 2, is characterized in that: any one in the ground digital television signal that described first via signal comprises DVB-T standard and ISDB-T standard and the digital catv signal of DVB-C standard or more than.
5. multi-modulation scheme tuner according to claim 1 and 2, is characterized in that: any one in the SD digital satellite television signal that the second described road signal comprises DVB-S standard and the high-definition digital satellite TV signal of DVB-S2 standard or more than.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420006474.2U CN203661184U (en) | 2014-01-03 | 2014-01-03 | Multi-standard tuner having broadband radio frequency input loop addition output function |
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| CN201420006474.2U CN203661184U (en) | 2014-01-03 | 2014-01-03 | Multi-standard tuner having broadband radio frequency input loop addition output function |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105846899A (en) * | 2016-05-05 | 2016-08-10 | 长春理工大学 | Broadband radio frequency signal optical fiber transmission system |
| CN106534934A (en) * | 2016-11-10 | 2017-03-22 | 深圳市通久电子有限公司 | Three-into-one-mode-based set-top box and realization method |
| CN108282628A (en) * | 2018-02-09 | 2018-07-13 | 深圳创维－Rgb电子有限公司 | TV motherboard, TV motherboard component and DTV |
-
2014
- 2014-01-03 CN CN201420006474.2U patent/CN203661184U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105846899A (en) * | 2016-05-05 | 2016-08-10 | 长春理工大学 | Broadband radio frequency signal optical fiber transmission system |
| CN106534934A (en) * | 2016-11-10 | 2017-03-22 | 深圳市通久电子有限公司 | Three-into-one-mode-based set-top box and realization method |
| CN108282628A (en) * | 2018-02-09 | 2018-07-13 | 深圳创维－Rgb电子有限公司 | TV motherboard, TV motherboard component and DTV |
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Address after: 511455 Guangdong city of Guangzhou province Nansha District Huangge Town Ji Sheng Lu No. 2 (plant A) Patentee after: EARDA TECHNOLOGIES Co.,Ltd. Address before: 511442 Guangdong Province, Guangzhou City Southern towns Panyu District Po Village Road No. 8 2 Dengyun building 401, 501 Patentee before: EARDA ELECTRONICS LTD. |
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Granted publication date: 20140618 |