CN101312508A - Satellite digital video broadcast receiving circuit and signal receiving method thereof - Google Patents
Satellite digital video broadcast receiving circuit and signal receiving method thereof Download PDFInfo
- Publication number
- CN101312508A CN101312508A CNA2007101061178A CN200710106117A CN101312508A CN 101312508 A CN101312508 A CN 101312508A CN A2007101061178 A CNA2007101061178 A CN A2007101061178A CN 200710106117 A CN200710106117 A CN 200710106117A CN 101312508 A CN101312508 A CN 101312508A
- Authority
- CN
- China
- Prior art keywords
- signal
- digital video
- satellite
- video broadcast
- signal path
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
The invention relates to a digital video broadcasting (DVB-S) receiving circuit with multiple inputs and a signal receiving method, which can receive the planet input signals provided by a plurality of low noise frequency alias demultiplier (LNB), to reduce the construction cost of the DVB-S system. The DVB-S receiving circuit comprises a selecting circuit and a bonding device, wherein the selecting circuit comprises a plurality of signal paths for receiving and transmitting a plurality of planet input signals, the selecting circuit triggers one of the signal paths according to a control signal to output one of the planet input signals, the bonding device bonds the signal paths into a single path to be connected with a DVB-S turner for following treatment.
Description
Technical field
What the present invention relates to is a kind of satellite digital video broadcast (Digital VideoBroadcasting-Satellite is called for short DVB-S), refers to the DVB-S receiving circuit and the signal acceptance method thereof of the multiple input of a kind of tool especially.
Background technology
Satellite digital video broadcast is widely used digital satellite television transmission standard, its signal (being generally the video signal of different channel) for each satellite channel, utilize lnb (low noise block earlier, be called for short LNB) with its frequency reducing, deliver to other DVB-S receiver again and carry out subsequent treatment.Figure 1A is the Organization Chart of the DVB-S system of background technology, and it delivers to DVB-S receiver 10,11 respectively again by the signal that antenna 14,19 and LNB12,13 receive two different satellites respectively.In other words,, all need to use a DVB-S receiver to handle separately for the satellite-signal that each LNB received, cause the DVB-S system to set up cost very high.
For example, indoor when setting up the DVB-S system, if have two rooms, each room all to want to watch satellite television, then with the situation of two LNB, just need four DVB-S receivers altogether, shown in Figure 1B, LNB12,13 delivers to two rooms by splitter (splitter) 17,18 with the satellite-signal branch, and each room all needs two DVB-S receivers ( label 10,11,15 and 16), could the complete satellite video signal of watching.
Summary of the invention
In view of this, the object of the invention is to provide the DVB-S receiving circuit of the multiple input of a kind of tool, can receive the satellite input signal that a plurality of LNB provides, to reduce the system cost of DVB-S.
The present invention discloses a kind of DVB-S receiving circuit, comprise: one selects circuit, comprise first and second signal path, first signal path is in order to receive and the transmission first satellite input signal, the secondary signal path is in order to receive and the transmission second satellite input signal, described selection circuit is according to a control signal, trigger first and second signal path one of them, with export first and second satellite input signal one of them; And a colligator, be coupled to described selection circuit, in order to first and second signal path is combined into single-pathway, can be connected to a DVB-S tuner.
The present invention discloses a kind of DVB-S receiving circuit in addition, it comprises: a radio frequency switch, receive first and second satellite input signal respectively from first and second lnb, and according to a control signal, optionally export first and second satellite input signal one of them to a DVB-S tuner, wherein, described radio frequency switch and described DVB-S tuner are to be incorporated in the same integrated circuit; And a control unit, in order to produce described control signal.
The present invention also discloses a kind of DVB-S signal acceptance method, comprises: receive and transmission plurality of satellites input signal via a plurality of signal paths; According to a control signal, trigger described complex signal path one of them, with export described plural satellite input signal one of them; And the binding signal path becomes single-pathway output.
Description of drawings
Figure 1A is the Organization Chart of the DVB-S system of background technology;
Figure 1B shows that the framework applications of Figure 1A is in an indoor example;
Fig. 2 is the Organization Chart according to the DVB-S system of one embodiment of the invention;
Fig. 3 is the calcspar of a preferred embodiment of DVB-S receiving circuit of the present invention;
Fig. 4 A is the calcspar of first embodiment of the DVB-S receiving circuit of Fig. 3;
Fig. 4 B is a thin portion circuit diagram of the DVB-S receiving circuit of Fig. 4 A;
Fig. 5 is the calcspar of second embodiment of the DVB-S receiving circuit of Fig. 3;
Fig. 6 is the calcspar of another preferred embodiment of DVB-S receiving circuit of the present invention;
Fig. 7 is the signal acceptance method flow chart of preferred embodiment of the present invention.
10,11,15,16, the 20-DVB-S receiver description of reference numerals:; 12,13,21,22-lnb; 14,19,23,24-antenna; 17,18-splitter; 30,60-DVB-S receiving circuit; 31-selects circuit; 311,312-switch; 313,314,63,64-inductance; 315,316-low noise amplifier; The 32-colligator; 33,62-control unit; The 34-DVB-S tuner; 61-radio frequency switch; The flow process of one preferred embodiment of 70～72-signal acceptance method.
Embodiment
Below in conjunction with accompanying drawing, be described in more detail with other technical characterictic and advantage the present invention is above-mentioned.
Fig. 2 is the Organization Chart according to the DVB-S system of one embodiment of the invention, lnb (LNB) 21,22 receives the signal of different satellites respectively from antenna 23,24, through down conversion process, export the first satellite input signal and the second satellite input signal respectively.DVB-S receiver 20 has two inputs, can receive first and second satellite input signal from LNB21,22 respectively, and desire realizes with the satellite-signal of single DVB-S receiver reception from two LNB.
Fig. 3 is DVB-S receiving circuit 30 calcspars of a preferred embodiment of the present invention, wherein, DVB-S receiving circuit 30 is the DVB-S receivers 20 that are arranged in Fig. 2 with DVB-S tuner 34, and DVB-S receiving circuit 30 comprises selection circuit 31, a colligator (combiner) 32 and a control unit 33.Select circuit 31 to comprise first signal path and secondary signal path, first signal path is in order to transmit the first satellite input signal, and the secondary signal path is in order to transmit the second satellite input signal.The control signal of selecting circuit 31 to be produced according to control unit 33, trigger first and second signal path one of them, with export first and second satellite input signal one of them, for example, if trigger first signal path, then export the first satellite input signal, the secondary signal path then is in disabled state, promptly do not export the second satellite input signal, anti-is also right.Colligator 32 is coupled to selects circuit 31, to select first and second signal path of circuit 31 to be combined into single-pathway, be connected to DVB-S tuner 34, colligator 32 can low cost provide the good isolation effect, to reduce the interference to each other of first and second signal path.For example, the path that first signal path is experienced in colligator 32 is the quarter-wave of the first satellite input signal or a wavelength of two minutes, the path that the secondary signal path is experienced in colligator 32 is the quarter-wave of the second satellite input signal or a wavelength of two minutes, to guarantee the isolation effect between two signal paths.
Fig. 4 A is the calcspar of first embodiment of the DVB-S receiving circuit 30 of Fig. 3, select circuit 31 comprise switch 311,312, capacitor C 1, C2, with inductance 313,314, the power supply signal that control unit 33 is provided is to deliver to LNB21,22 via switch 311,312 respectively.Capacitor C 1, C2 are separately positioned in first and second signal path, to isolate direct current (DC) signal in first and second signal path, avoid it to send into colligator 32.In this embodiment, capacitor C 1, C2 isolated controlling unit 33 are delivered to the dc power signal of first and second signal path via switch 311,312, to avoid feed-in colligator 32; And the control signal that control unit 33 produces comprises first triggering signal and second triggering signal, deliver to switch 311,312 respectively, whether to control its conducting, for example, when first triggering signal makes switch 311 conductings, second triggering signal then makes switch 312 not conductings, this moment, LNB21 was by power supply signal power supply running, and LNB22 is non-transformer signal and can't operating then, so, can trigger first signal path and while forbidden energy secondary signal path, anti-is also right.Inductance 313 is coupled between switch 311 and the LNB21, can isolate interchange (AC) signal in first signal path; Inductance 314 is coupled between switch 312 and the LNB22, can isolate the AC signal in the secondary signal path.
Switch 311,312 can be transistor switch, inductance 313,314 can be trace (trace) inductance, and shown in 4B figure, switch 311,312 is the BJT transistor, first and second triggering signal is then delivered to the transistorized base stage of BJT, whether to control the BJT transistor turns.Switch 311,312 also can MOS transistor be implemented, and this moment, first and second triggering signal was then delivered to the gate of MOS transistor, whether to control the MOS transistor conducting.
Fig. 5 is the calcspar of second embodiment of the DVB-S receiving circuit 30 of Fig. 3, wherein, select circuit 31 to comprise low noise amplifier (low noise amplifier, be called for short LNA) 315,316, be separately positioned in first and second signal path, so that first and second satellite input signal reaches enough signal strength signal intensities, and the noise in the reduction signal path.The control signal that control unit 33 is provided comprises first triggering signal and second triggering signal, send into LNA315,316 respectively, optionally to trigger LNA315,316, for example, when first triggering signal triggering LNA315 makes its running, second triggering signal then forbidden energy LNA316 does not operate it, so reaches to trigger first signal path, while forbidden energy secondary signal path, and anti-is also right.
Preferably, colligator 32 can be incorporated in the same integrated circuit (IC) with DVB-S tuner 34, and perhaps, DVB-S receiving circuit 30 is to be incorporated in the same integrated circuit with DVB-S tuner 34, to dwindle whole DVB-S receiver 20.
Fig. 6 is DVB-S receiving circuit 60 calcspars of another preferred embodiment of the present invention, and DVB-S receiving circuit 60 comprises a radio frequency switch (RF switch) 61, one control unit 62, capacitor C 3, C4 and trace inductance 63,64.LNB21,22 transmits first and second satellite input signal respectively, after passing through capacitor C 3, C4 respectively, feed-in radio frequency switch 61, according to the control signal that control unit 62 is provided, optionally export first and second satellite input signal one of them to DVB-S tuner 34.Control unit 62 supplies one direct current power supply signal is powered respectively at LNB21,22 via trace inductance 63,64, and control unit 62 can be microcontroller, and radio frequency switch 61 can be incorporated in the same integrated circuit with DVB-S tuner 34.
The embodiment of Fig. 2 to Fig. 6 may extend to the situation with plural input, for example, among Fig. 3, select circuit 31 can comprise N signal path (N 〉=2), in order to receive and N satellite input signal of transmission, and can be according to a control signal, trigger N signal path one of them, with N satellite input signal of output one of them; 32 of colligators can be combined into single-pathway with N signal path, are connected to DVB-S tuner 34.Preferably, the path that experienced in colligator 32 of each signal path is the quarter-wave or 1/2nd wavelength of the satellite input signal that described signal path transmitted.
Fig. 7 is the DVB-S signal acceptance method flow chart of a preferred embodiment of the present invention, comprises the following step:
Step 70: receive and transmission plurality of satellites input signal via a plurality of signal paths.
Step 71: according to a control signal, trigger more described signal path one of them, with export more described satellite input signal one of them.
Step 72: more described signal path is combined into single-pathway exports the DVB-S tuner to.
The above only is preferred embodiment of the present invention, only is illustrative for the purpose of the present invention, and nonrestrictive.Those skilled in the art is understood, and can carry out many changes to it in the spirit and scope that claim of the present invention limited, revise, even equivalence, but all will fall within the scope of protection of the present invention.
Claims (14)
1. satellite digital video broadcast receiving circuit, it is characterized in that: it comprises:
One selects circuit to comprise one first signal path and a secondary signal path, described first signal path is in order to receive and transmission one first satellite input signal, described secondary signal path is in order to receive and transmission one second satellite input signal, described selection circuit is according to a control signal, described first and second signal path one of them, with export described first and second satellite input signal one of them; And
One colligator is coupled to described selection circuit, in order to described first signal path and described secondary signal path are combined into a single-pathway, is connected to a satellite digital video broadcast tuner.
2. satellite digital video broadcast receiving circuit according to claim 1, it is characterized in that: also comprise a control unit, described first satellite input signal and the described second satellite input signal are provided by one first lnb and one second lnb respectively, described control unit provides a power supply signal, delivers to described first lnb and described second lnb respectively via described selection circuit.
3. satellite digital video broadcast receiving circuit according to claim 2, it is characterized in that: described selection circuit comprises one first inductance and one second inductance, and described power supply signal is to deliver to described first lnb and described second lnb via described first inductance and described second inductance respectively.
4. satellite digital video broadcast receiving circuit according to claim 3 is characterized in that: described first inductance and described second inductance are the trace inductance.
5. satellite digital video broadcast receiving circuit according to claim 2, it is characterized in that: described selection circuit comprises one first switch and a second switch, described power supply signal is to deliver to described first lnb and described second lnb via described first switch and described second switch respectively, wherein, described control signal comprises one first triggering signal and one second triggering signal, to control described first switch and described second switch respectively.
6. satellite digital video broadcast receiving circuit according to claim 5 is characterized in that: described first switch and described second switch are transistor switch.
7. satellite digital video broadcast receiving circuit according to claim 1, it is characterized in that: described selection circuit comprises one first low noise amplifier and one second low noise amplifier, be separately positioned in described first signal path and the described secondary signal path, wherein said control signal comprises one first triggering signal and one second triggering signal, optionally to trigger described first low noise amplifier and described second low noise amplifier respectively.
8. satellite digital video broadcast receiving circuit according to claim 1, it is characterized in that: described selection circuit comprises one first electric capacity and one second electric capacity, be separately positioned in described first signal path and the described secondary signal path, to isolate the direct current signal in described first signal path and the described secondary signal path.
9. satellite digital video broadcast receiving circuit according to claim 1 is characterized in that: described satellite digital video broadcast receiving circuit and described satellite digital video broadcast tuner are to be incorporated in the same integrated circuit.
10. satellite digital video broadcast receiving circuit according to claim 1, it is characterized in that: the path that described first signal path is experienced in described colligator is the quarter-wave of the described first satellite input signal, and the path that described secondary signal path is experienced in described colligator is the quarter-wave of the described second satellite input signal.
11. a satellite digital video broadcast receiving circuit, it is characterized in that: it comprises:
One radio frequency switch, receive one first satellite input signal and one second satellite input signal respectively from one first lnb and one second lnb, and according to a control signal, optionally export described first satellite input signal and the described second satellite input signal one of them; And
One control unit is in order to produce described control signal.
12. satellite digital video broadcast receiving circuit according to claim 11 is characterized in that: described control unit provides a power supply signal, delivers to described first lnb and described second lnb respectively.
13. the satellite digital video broadcast receiving circuit of the multiple input of tool, it is characterized in that: it comprises:
One selects circuit, comprises a plurality of signal paths, and in order to receiving and transmission plurality of satellites input signal, described selection circuit is according to a control signal, trigger more described signal path one of them; And
One colligator is coupled to described selection circuit, in order to more described signal path is combined into a single-pathway.
14. a satellite digital video broadcast signal acceptance method, it is characterized in that: it comprises:
Receive and transmission plurality of satellites input signal via a plurality of signal paths;
According to a control signal, trigger described complex signal path one of them; And
Described complex signal path is combined into single-pathway output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101061178A CN101312508A (en) | 2007-05-25 | 2007-05-25 | Satellite digital video broadcast receiving circuit and signal receiving method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101061178A CN101312508A (en) | 2007-05-25 | 2007-05-25 | Satellite digital video broadcast receiving circuit and signal receiving method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101312508A true CN101312508A (en) | 2008-11-26 |
Family
ID=40100909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101061178A Pending CN101312508A (en) | 2007-05-25 | 2007-05-25 | Satellite digital video broadcast receiving circuit and signal receiving method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101312508A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103716563A (en) * | 2012-10-04 | 2014-04-09 | Lg伊诺特有限公司 | Broadcasting receiving device |
| CN104363432A (en) * | 2014-10-29 | 2015-02-18 | 珠海市肯普电子科技有限公司 | Single-cable combined switch system |
-
2007
- 2007-05-25 CN CNA2007101061178A patent/CN101312508A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103716563A (en) * | 2012-10-04 | 2014-04-09 | Lg伊诺特有限公司 | Broadcasting receiving device |
| TWI612779B (en) * | 2012-10-04 | 2018-01-21 | Ｌｇ伊諾特股份有限公司 | Broadcast receiving device |
| CN104363432A (en) * | 2014-10-29 | 2015-02-18 | 珠海市肯普电子科技有限公司 | Single-cable combined switch system |
| CN104363432B (en) * | 2014-10-29 | 2017-10-13 | 珠海市肯普电子科技有限公司 | A kind of single cable combination switch system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1863193B1 (en) | Digital satellite receiver and method for switching among multiple receiver antennas using diversity circuitry | |
| JPH10135858A (en) | Satellite signal distributer | |
| CN100508552C (en) | Television system | |
| US10349112B2 (en) | Method and system for multi-path video and network channels | |
| TWI336591B (en) | Digital video broadcasting-satellite multi-input receiving circuit and associated receving method thereof | |
| CN103023435B (en) | Low noise converter of satellite broadcasting receiver | |
| JP2004140594A (en) | Satellite broadcast receiver | |
| CN101312508A (en) | Satellite digital video broadcast receiving circuit and signal receiving method thereof | |
| US20100130157A1 (en) | Rf isolation of low cost switch using shunt diode | |
| JP5123147B2 (en) | Broadcast signal amplifying apparatus and broadcast signal receiving system | |
| JP3415526B2 (en) | Satellite receiving system and booster device and power supply device used in the system | |
| KR101084906B1 (en) | Terrestrial and satellite tuner using loop through circuit | |
| JP3947031B2 (en) | Satellite signal reception transmission system and switching distributor | |
| JP2006304016A (en) | Television tuner integrated with terrestrial/bs signal | |
| CN213846841U (en) | Multi-output satellite down converter | |
| JP4125545B2 (en) | Signal mixer and satellite communication system | |
| JP2003209478A (en) | Tv signal receiving system | |
| JP2001086020A (en) | Satellite wave conversion device | |
| JPH0411490A (en) | Satellite receiving system | |
| JPS63309032A (en) | Satellite broadcast reception system | |
| KR960004403Y1 (en) | Satellite broadcasting radio receiving system | |
| CN103200435A (en) | Set top box and control method and television signal transmission system used for same | |
| KR200416498Y1 (en) | Receiving system with combined Low Noise Blockdown Converter and Set-Top Box for outdoor | |
| WO2011122675A1 (en) | Television broadcast signal transmission system | |
| JP2009164879A (en) | Power supply adapter and power supply system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20081126 |