CN104935993B - DTV WIFI/EOC filter control circuits and control method - Google Patents
DTV WIFI/EOC filter control circuits and control method Download PDFInfo
- Publication number
- CN104935993B CN104935993B CN201510349440.2A CN201510349440A CN104935993B CN 104935993 B CN104935993 B CN 104935993B CN 201510349440 A CN201510349440 A CN 201510349440A CN 104935993 B CN104935993 B CN 104935993B
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- eoc
- wifi
- triode
- filter
- circuits
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/422—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS]
- H04N21/42204—User interfaces specially adapted for controlling a client device through a remote control device; Remote control devices therefor
- H04N21/42206—User interfaces specially adapted for controlling a client device through a remote control device; Remote control devices therefor characterized by hardware details
- H04N21/42221—Transmission circuitry, e.g. infrared [IR] or radio frequency [RF]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/422—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS]
- H04N21/42204—User interfaces specially adapted for controlling a client device through a remote control device; Remote control devices therefor
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/426—Internal components of the client ; Characteristics thereof
- H04N21/42607—Internal components of the client ; Characteristics thereof for processing the incoming bitstream
- H04N21/4263—Internal components of the client ; Characteristics thereof for processing the incoming bitstream involving specific tuning arrangements, e.g. two tuners
- H04N21/42638—Internal components of the client ; Characteristics thereof for processing the incoming bitstream involving specific tuning arrangements, e.g. two tuners involving a hybrid front-end, e.g. analog and digital tuners
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Human Computer Interaction (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention discloses a kind of DTV WIFI/EOC filter control circuits,It includes SOC master chips and silicon tuner signal processing chip,It is sequentially connected electrically switching circuit and WIFI/EOC filter circuits between SOC master chips and silicon tuner signal processing chip,The switching circuit and WIFI/EOC filter circuits are used to radio-frequency input signals RF_IN processing obtaining radio frequency output signal RF_OUT,The silicon tuner signal processing chip is for receiving radio frequency output signal RF_OUT,The SOC master chips are for exporting low and high level control switching circuit,This method is mainly that user selects WIFI/EOC filtering on or off signals by being remotely controlled Menu key,Then WIFI/EOC filter circuits switch is realized by SOC master chips control switching circuit,Beneficial effects of the present invention are：It is selected by custom menu, is suitable for a variety of different numbers, anolog TV signals environment, one side producer, which can save, adds external filter and after-sales cost, on the other hand, for user, also provide very big convenience, can " DIY " solve the problems, such as TV watching.
Description
Technical field
The present invention relates to digital TV technologies, and in particular to a kind of DTV WIFI/EOC filter control circuits and
Control method.
Background technology
Broadcasting and TV signal standards in various regions differs at present, and online EOC letters are inserted in the DVB-C wire signals that some areas are registered one's residence
Number, which can interfere tuner, when causing to watch DVBC digital signal programs, serious mosaic occur；In addition, now
Into Internet era, most families be equipped with WIFI routers online, wireless WIFI signal may by radiation mode into
Enter tuner, interfere tuner, mosaic phenomenon occurs when also resulting in viewing DVBC digital signals.
Invention content
The present invention overcomes the deficiencies that signal environment special in the prior art will bring interference TV signal, provide one kind
The easily DTV WIFI/EOC filter control circuits of processing EOC/WIFI interference.
In order to solve the above technical problems, the present invention uses following technical scheme：
A kind of DTV WIFI/EOC filter control circuits, it includes SOC master chips and silicon tuner signal processing core
Piece has been sequentially connected electrically switching circuit and WIFI/EOC filtered electricals between SOC master chips and silicon tuner signal processing chip
Road, the switching circuit and WIFI/EOC filter circuits are used to radio-frequency input signals RF_IN processing obtaining radio frequency output signal
RF_OUT, the silicon tuner signal processing chip is for receiving radio frequency output signal RF_OUT, and the SOC master chips are for defeated
Go out low and high level control switching circuit.
Further technical solution is that the switching circuit includes the first triode Q1, the second triode Q2 and third
One end of the collector access WIFI/EOC filter circuits of triode Q3, the first triode Q1, emitter access radio frequency are defeated
Enter the base stage of signal RF_IN, ground level access third transistor Q3, the collector of the third transistor Q3 is respectively connected to 3.3V electricity
The base stage of source and the second triode Q2, emitter ground connection, the emitter access radio-frequency input signals RF_ of the second triode Q2
The other end of IN, collector access WIFI/EOC filter circuits.
Further technical solution is that the first triode Q1 and the second triode Q2 are positive-negative-positive triode, described
Third transistor Q3 is NPN type triode.
Further technical solution is, the WIFI/EOC filter circuits by the WIFI filter circuits that are electrically connected to each other and
EOC filter circuits form, and WIFI filter circuits one end is electrically connected with the collector of the second triode Q2, the EOC filtering
Circuit on one side is electrically connected with the collector of the first triode Q1.
Further technical solution is that the WIFI filter circuits are in parallel respectively by the first lc circuit and the second lc circuit
π type filter circuits are formed at the both ends of the first inductance coil L1.
Further technical solution is that the EOC filter circuits include three groups of lc circuits, wherein every two groups of lc circuits it
Between pass through the first capacitance C1 electrical connection.
It is high level when the I/O mouths of SOC chip export by the way that switching circuit and filter circuit is arranged in the technical program,
At this point, the first triode Q1 cut-offs, the second triode Q2 and third transistor Q3 conductings, radio-frequency input signals RF_IN cannot lead to
It crosses the first triode Q1 and reaches WIFI/EOC filter circuits, but the ends RF_OUT are directly shorted to by the second triode Q2, send
It is low level when the I/O mouths of SOC chip export to silicon tuner signal processing chip, at this point, the first triode Q1 conductings, the
Two triode Q2 and third transistor Q3 cut-offs, radio-frequency input signals RF_IN cannot be by the second triode Q2, can only be by the
One triode Q1 directly reaches WIFI/EOC filter circuits and is filtered, then is output to the ends RF_OUT, is sent to silicon tuner signal
Processing chip.
For the WiFi/EOC filter circuits of " ON/OFF " function on Core of TV set plate, user can basis in the technical program
Practical service environment carries out manual setting "ON" or "Off", i.e., when encountering EOC, WIFI interference, can by remote controler selection come
Switching circuit is controlled to open WIFI/EOC filter circuits, when watching simulated television, controllable switch circuit defaults are to close
WIFI/EOC filter circuits are closed, the reason is that EOC filter circuits can filter out the signal of 0~65MHz, in this range of signal
Analog signal also will be filtered, therefore user watches these analog signals if necessary, it is necessary to close WIFI/EOC filtered electricals
Road.
The present invention also provides a kind of control methods of DTV WIFI/EOC filter circuits, it includes the following steps：
Step 1, user selects WIFI/EOC filtering on or off signals by being remotely controlled Menu key；
Step 2, when user selects ON signal, remote control reception head receives ON signal, and sends out corresponding remote control command code,
SOC master chips receive the remote control command code, and the I/O mouths of control SOC master chips export low level, at this point, the first triode Q1 is led
Logical, the second triode Q2 and third transistor Q3 cut-offs, radio-frequency input signals RF_IN cannot be by the second triode Q2, can only
WIFI/EOC filter circuits are reached by the first triode Q1 to be filtered, then export radio frequency output signal RF_OUT, are sent to silicon
Tuner signal processing chip；
Step 3, when user selects OFF signal, remote control reception head receives OFF signal, and sends out corresponding remote control command code,
SOC master chips receive the remote control command code, and the I/O mouths of control SOC master chips export high level, at this point, the first triode Q1 is cut
Only, the second triode Q2 and third transistor Q3 conductings, radio-frequency input signals RF_IN cannot be reached by the first triode Q1
WIFI/EOC filter circuits, but radio frequency output signal RF_OUT is directly exported by the second triode Q2, it is sent to silicon tuner
Signal processing chip.
Compared with prior art, the beneficial effects of the invention are as follows：
The present invention is selected by custom menu, is suitable for a variety of different numbers, anolog TV signals environment, a side
Face saves the production of producer, after cost, and another aspect user can be conveniently selected as no use according to oneself signal environment
Signal filter function is eliminated due to the Marseille that WIFI/EOC interference fringes come phenomenon.
Description of the drawings
Fig. 1 is the circuit block diagram of the DTV WIFI/EOC filter control circuits of an embodiment of the present invention.
Fig. 2 is switching circuit and WIFI/ in the DTV WIFI/EOC filter control circuits of an embodiment of the present invention
The circuit diagram of EOC filter circuits.
Fig. 3 is the flow diagram of the control method of the DTV WIFI/EOC filter circuits of an embodiment of the present invention.
Specific implementation mode
The present invention is further elaborated below in conjunction with the accompanying drawings.
As depicted in figs. 1 and 2, a kind of DTV WIFI/EOC filter control circuits, it includes SOC master chips 1 and silicon
Tuner signal processing chip 4 has been sequentially connected electrically switch electricity between SOC master chips 1 and silicon tuner signal processing chip 4
Road 2 and WIFI/EOC filter circuits 3, the switching circuit 2 and WIFI/EOC filter circuits 3 are used for radio-frequency input signals RF_
IN processing obtains radio frequency output signal RF_OUT, and the silicon tuner signal processing chip 4 is for receiving radio frequency output signal RF_
OUT, the SOC master chips 1 include the first triode for exporting low and high level control switching circuit 2, the switching circuit 2
The collector of Q1, the second triode Q2 and third transistor Q3, the first triode Q1 access WIFI/EOC filter circuits 3
The base stage of radio-frequency input signals RF_IN, ground level access third transistor Q3, the third transistor Q3 are accessed in one end, emitter
Collector be respectively connected to the base stage of 3.3V power supplys and the second triode Q2, emitter ground connection, the hair of the second triode Q2
Emitter-base bandgap grading accesses the other end of radio-frequency input signals RF_IN, collector access WIFI/EOC filter circuits 3, the WIFI/EOC filters
Wave circuit 3 is made of the WIFI filter circuits and EOC filter circuits being electrically connected to each other, WIFI filter circuits one end and second
The collector of triode Q2 is electrically connected, and EOC filter circuits one end is electrically connected with the collector of the first triode Q1, described
The both ends that WIFI filter circuits are connected in parallel on the first inductance coil L1 by the first lc circuit 31 and the second lc circuit 32 respectively form π types
Filter circuit, the EOC filter circuits include three groups of lc circuits, wherein being electrically connected by the first capacitance C1 between every two groups of lc circuits
It connects.
According to one embodiment of present invention, the first triode Q1 and the second triode Q2 is positive-negative-positive triode, institute
It is NPN type triode to state third transistor Q3.
As shown in figure 3, a kind of control method of DTV WIFI/EOC filter control circuits, it includes the following steps
S11, user select WIFI/EOC filtering on or off signals by being remotely controlled Menu key；
S12, when user selects ON signal, remote control reception head receives ON signal, and sends out corresponding remote control command code,
SOC master chips 1 receive the remote control command code, and the I/O mouths of control SOC master chips 1 export low level, at this point, the first triode Q1
Conducting, the second triode Q2 and third transistor Q3 cut-offs, radio-frequency input signals RF_IN cannot be by the second triode Q2, only
WIFI/EOC filter circuits 3 can be reached by the first triode Q1 to be filtered, then export radio frequency output signal RF_OUT, be sent to
Silicon tuner signal processing chip 4；
S13, when user selects OFF signal, remote control reception head receives OFF signal, and sends out corresponding remote control command code,
SOC master chips 1 receive the remote control command code, and the I/O mouths of control SOC master chips 1 export high level, at this point, the first triode Q1
Cut-off, the second triode Q2 and third transistor Q3 conductings, radio-frequency input signals RF_IN cannot be reached by the first triode Q1
WIFI/EOC filter circuits 3, but radio frequency output signal RF_OUT is directly exported by the second triode Q2, it is sent to silicon tuner
Signal processing chip 4.
The essence of the present invention is described in detail in the above specific implementation mode, but can not be to protection scope of the present invention
It is limited, it should be apparent that, under the inspiration of the present invention, those of ordinary skill in the art can also carry out many improvement
And modification, it should be noted that these improvement and modification are all fallen within the claims of the present invention.
Claims (6)
1. a kind of DTV WIFI/EOC filter control circuits, it includes SOC master chips (1) and silicon tuner signal processing core
Piece (4), which is characterized in that be sequentially connected electrically switch between SOC master chips (1) and silicon tuner signal processing chip (4)
Circuit (2) and WIFI/EOC filter circuits (3), the switching circuit (2) and WIFI/EOC filter circuits (3) are used for radio frequency is defeated
Enter signal RF_IN processing and obtain radio frequency output signal RF_OUT, the switching circuit (2) includes the first triode Q1, the two or three
One end of the collector of grade pipe Q2 and third transistor Q3, the first triode Q1 access WIFI/EOC filter circuits (3), hair
Emitter-base bandgap grading accesses the base stage of radio-frequency input signals RF_IN, ground level access third transistor Q3, the collector of the third transistor Q3
It is respectively connected to base stage, the emitter ground connection of 3.3V power supplys and the second triode Q2, the emitter access of the second triode Q2
The other end of radio-frequency input signals RF_IN, collector access WIFI/EOC filter circuits (3)；The silicon tuner signal processing
Chip (4) is used to receive radio frequency output signal RF_OUT, what the SOC master chips (1) were used to receive to be gone out by remote control reception hair
Remote control command code simultaneously exports low and high level control switching circuit (2), when exporting high level, the second triode Q2, the three or three pole
Pipe Q3 conductings, the first triode Q1 cut-offs, radio-frequency input signals RF_IN are exported by collector one end of the second triode Q2,
WIFI/EOC filter circuits are skipped, when exporting low level, the second triode Q2, third transistor Q3 cut-offs, the first triode
Q1 is connected, and radio-frequency input signals RF_IN is input to WIFI/EOC filter circuits by the collector of the first triode Q1 and is filtered
Wave.
2. DTV WIFI/EOC filter control circuits according to claim 1, which is characterized in that first three-level
Pipe Q1 and the second triode Q2 is positive-negative-positive triode, and the third transistor Q3 is NPN type triode.
3. DTV WIFI/EOC filter control circuits according to claim 1, which is characterized in that the WIFI/EOC
Filter circuit (3) is made of the WIFI filter circuits and EOC filter circuits being electrically connected to each other, WIFI filter circuits one end with
The collector of second triode Q2 is electrically connected, and EOC filter circuits one end is electrically connected with the collector of the first triode Q1.
4. DTV WIFI/EOC filter control circuits according to claim 3, which is characterized in that the WIFI filtering
The both ends that circuit is connected in parallel on the first inductance coil L1 by the first lc circuit (31) and the second lc circuit (32) respectively form the filtering of π types
Circuit.
5. DTV WIFI/EOC filter control circuits according to claim 3, which is characterized in that the EOC filtering
Circuit includes three groups of lc circuits, wherein passing through the first capacitance C1 electrical connections between every two groups of lc circuits.
6. a kind of control method of DTV WIFI/EOC filter control circuits, which is characterized in that it includes the following steps：
Step 1, user selects WIFI/EOC filtering on or off signals by being remotely controlled Menu key；
Step 2, when user selects ON signal, remote control reception head receives ON signal, and sends out corresponding remote control command code, SOC
Master chip (1) receives the remote control command code, and the I/O mouths of control SOC master chips (1) export low level, at this point, the first triode Q1
Conducting, the second triode Q2 and third transistor Q3 cut-offs, radio-frequency input signals RF_IN cannot be by the second triode Q2, only
WIFI/EOC filter circuits (3) can be reached by the first triode Q1 to be filtered, then export radio frequency output signal RF_OUT, send
To silicon tuner signal processing chip (4)；
Step 3, when user selects OFF signal, remote control reception head receives OFF signal, and sends out corresponding remote control command code, SOC
Master chip (1) receives the remote control command code, and the I/O mouths of control SOC master chips (1) export high level, at this point, the first triode Q1
Cut-off, the second triode Q2 and third transistor Q3 conductings, radio-frequency input signals RF_IN cannot be reached by the first triode Q1
WIFI/EOC filter circuits (3), but radio frequency output signal RF_OUT is directly exported by the second triode Q2, it is sent to silicon high frequency
Head signal processing chip (4).
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| CN201510349440.2A CN104935993B (en) | 2015-06-23 | 2015-06-23 | DTV WIFI/EOC filter control circuits and control method |
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| CN201510349440.2A CN104935993B (en) | 2015-06-23 | 2015-06-23 | DTV WIFI/EOC filter control circuits and control method |
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| CN104935993A CN104935993A (en) | 2015-09-23 |
| CN104935993B true CN104935993B (en) | 2018-10-19 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106658746B (en) * | 2015-10-30 | 2020-08-25 | 华为终端有限公司 | Selection circuit of WiFi channel |
| CN206908757U (en) * | 2017-06-27 | 2018-01-19 | 深圳Tcl新技术有限公司 | The anti-jamming circuit and digital television of digital television |
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| CN203219450U (en) * | 2013-04-08 | 2013-09-25 | 深圳市九洲电器有限公司 | Set top box true standby and standby wake-up circuit and set top box |
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| US7973861B2 (en) * | 2007-04-19 | 2011-07-05 | Newport Media, Inc. | Universal tuner for mobile TV |
| CN201130999Y (en) * | 2007-11-16 | 2008-10-08 | 南阳金光数字显示有限公司 | Light silicon crystal high definition digital television with set-top box function |
| CN202940776U (en) * | 2012-10-31 | 2013-05-15 | 河北德海电子科技有限公司 | C-band airborne power amplifier |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202940779U (en) * | 2012-12-06 | 2013-05-15 | 四川长虹电子部品有限公司 | Electronic tuner |
| CN203219450U (en) * | 2013-04-08 | 2013-09-25 | 深圳市九洲电器有限公司 | Set top box true standby and standby wake-up circuit and set top box |
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| CN204013863U (en) * | 2014-09-03 | 2014-12-10 | 四川长虹电子部品有限公司 | Antenna isolator |
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