CN209710217U - Control switching circuit and receiver - Google Patents
Control switching circuit and receiver Download PDFInfo
- Publication number
- CN209710217U CN209710217U CN201920868527.4U CN201920868527U CN209710217U CN 209710217 U CN209710217 U CN 209710217U CN 201920868527 U CN201920868527 U CN 201920868527U CN 209710217 U CN209710217 U CN 209710217U
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- resistance
- connects
- capacitor
- regulator chip
- terminal regulator
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Abstract
The utility model provides a kind of control switching circuit and receiver, and one end of first resistor, second resistance and first capacitor is all connected with transistor base in control switching circuit；The other end of first resistor connects the first switching signal；One end of the collector connection 3rd resistor of triode；The other end of 3rd resistor connects three-terminal regulator chip adjustable side；One end of 4th resistance connects adjustable side；One end of 5th resistance connects adjustable side, and the other end of the 5th resistance connects three-terminal regulator chip output end；One end of second capacitor connects adjustable side, and the other end of the second capacitor connects one end of the 6th resistance, and the other end of the 6th resistance connects the second switching signal, and the anode of first diode connects output end, and the cathode of first diode connects tuner.The circuit realizes the diversification of reception pattern, and it is more to receive program.
Description
Technical field
The utility model belongs to TV set-top box technical field more particularly to a kind of control switching circuit and receiver.
Background technique
Existing radio and television Rural areas receiver can only receive the control signal of one mode, do not only result in receiver and connect
The number of programs of receipts is limited, and can not achieve more satellite receptions, greatly influences the experience effect of user.
Utility model content
In view of this, the embodiments of the present invention provide a kind of control switching circuit, to solve to exist in the prior art
The problem of.
The embodiments of the present invention provide a kind of control switching circuit, comprising: three-terminal regulator chip, first resistor,
Two resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, first capacitor, the second capacitor, triode, the one or two pole
Pipe；One end of one end of the first resistor, one end of the second resistance and the first capacitor is all connected with three pole
The base stage of pipe；The other end of the first resistor is for connecting the first switching signal；The other end of the second resistance, described
The emitter of the other end of one capacitor and the triode is grounded；The collector of the triode connects the 3rd resistor
One end；The other end of the 3rd resistor connects the adjustable side of the three-terminal regulator chip；One end of 4th resistance connects
Connect the adjustable side of the three-terminal regulator chip, the other end ground connection of the 4th resistance；One end of 5th resistance connects institute
The adjustable side of three-terminal regulator chip is stated, the other end of the 5th resistance connects the output end of the three-terminal regulator chip；It is described
One end of second capacitor connects the adjustable side of the three-terminal regulator chip, the other end connection of second capacitor the 6th electricity
One end of resistance, the other end of the 6th resistance connect institute for connecting the second switching signal, the anode of the first diode
The output end of three-terminal regulator chip is stated, the cathode of the first diode is for connecting tuner；The three-terminal regulator chip
Input terminal connects DC source.
Further, further includes: third capacitor and the 4th capacitor；One end of the third capacitor connects the three-terminal voltage-stabilizing
The input terminal of chip, the other end ground connection of the third capacitor；One end of 4th capacitor connects the first diode
Cathode, the other end ground connection of the 4th capacitor.
Further, further includes: the second diode；The anode of second diode connects the DC source, and described the
The cathode of two diodes connects the input terminal of the three-terminal regulator chip.
Further, the three-terminal regulator chip selects LM317T.
Further, first switching signal is polarization mode switching signal；Second switching signal is DiSEqC
Switching signal.
The embodiments of the present invention also provide a kind of receiver, including above-described control switching circuit.
The utility model realizes the diversification of reception pattern by control switching circuit, and user being capable of received TV programme
It is more, and more satellite signal receivings may be implemented, greatly influence the experience effect of user.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram of control switching circuit provided by the embodiment of the utility model；
Fig. 2 is the structural schematic diagram of another control switching circuit provided by the embodiment of the utility model.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Embodiment 1
As shown in Figure 1, a kind of control switching circuit, comprising: three-terminal regulator chip U1, first resistor R1, second resistance R2,
3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, first capacitor C1, the second capacitor C2, triode T,
One diode D1；One end of one end of first resistor R1, one end of second resistance R2 and first capacitor C1 is all connected with triode T
Base stage；The other end of first resistor R1 is for connecting the first switching signal V1；The other end, the first capacitor C1 of second resistance R2
The other end and the emitter of triode T be grounded；One end of the collector connection 3rd resistor R3 of triode T；Third electricity
Hinder the adjustable side ADJ of the other end connection three-terminal regulator chip U1 of R3；One end of 4th resistance R4 connects three-terminal regulator chip U1
Adjustable side ADJ, the 4th resistance R4 the other end ground connection；The adjustable side of one end connection three-terminal regulator chip U1 of 5th resistance R5
The output end OUT of the other end connection three-terminal regulator chip U1 of ADJ, the 5th resistance R5；One end of second capacitor C2 connects three ends
The other end of the adjustable side ADJ of voltage stabilizing chip U1, the second capacitor C2 connect one end of the 6th resistance R6, and the 6th resistance R6's is another
End is for connecting the second switching signal V2, the output end OUT of the anode connection three-terminal regulator chip U1 of first diode D1, first
The cathode of diode D1 is for connecting tuner；Tuner (Low Noise Block, abbreviation LNB), i.e. low noise down coversion
Device, function are that Ku or C-band signal are become L-band by amplification and down coversion by the satellite-signal transmitted by feed, are passed through
Coaxial cable sends satellite receiver to.The input terminal of three-terminal regulator chip U1 connects DC source.
LM317T specifically can be selected in three-terminal regulator chip U1.First switching signal is specially polarization mode switching signal；Pole
Change mode switch include: it is left-handed, right-hand polarization mode switches.Second switching signal is DiSEqC switching signal.DiSEqC is English
The abbreviation of literary " Digital satellite Equipment Control ", literal translates as " digital satellite equipment control ".
DiSEqC switching signal for four cut a switch or eight cut the satellites such as a switch switching switch.DiSEqC switching signal may be implemented
More satellite receptions.Four, which cut a switch, may be implemented four satellite receptions.
Voltage from DC source is sent to the input terminal of three-terminal regulator chip U1, when receiving left-hand polarized signals, first
Switching signal V1Output low level signal adds on triode T through first resistor R1, and low level triode T is in off state,
The adjustable side ADJ of three-terminal regulator chip U1 is through the 4th resistance R4 to ground, and the output end OUT output of three-terminal regulator chip U1 at this time is about
The voltage of 18V or so send to outdoor LNB the downward signal of satellite for receiving left-handed polarization.When receiving right-hand polarized signals, first
Switching signal V1Output high level signal adds on triode T through first resistor R1, and high level triode T is in saturation conduction shape
State, the adjustable side ADJ of three-terminal regulator chip U1 is through 3rd resistor R3 and the 4th resistance R4 earth, three-terminal regulator chip at this time
The voltage of output end OUT output about 14V or so of U1 send to outdoor LNB the downward signal of satellite for receiving right-hand polarization.
Embodiment 2
As shown in Fig. 2, a kind of control switching circuit, is applied to satellite television receiver, comprising: three-terminal regulator chip U1,
First resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, first capacitor C1,
Second capacitor C2, third capacitor C3, the 4th capacitor C4, triode T, first diode D1 and the second diode D2；First resistor
One end of one end of R1, one end of second resistance R2 and first capacitor C1 is all connected with the base stage of triode T；First resistor R1's
The other end is for connecting the first switching signal V1；The other end of second resistance R2, the other end of first capacitor C1 and triode T
Emitter be grounded；One end of the collector connection 3rd resistor R3 of triode T；The other end of 3rd resistor R3 connects three ends
The adjustable side ADJ of voltage stabilizing chip U1；The adjustable side ADJ of one end connection three-terminal regulator chip U1 of 4th resistance R4, the 4th resistance
The other end of R4 is grounded；The adjustable side ADJ of one end connection three-terminal regulator chip U1 of 5th resistance R5, the 5th resistance R5's is another
The output end OUT of end connection three-terminal regulator chip U1；The adjustable side of one end connection three-terminal regulator chip U1 of second capacitor C2
The other end of ADJ, the second capacitor C2 connect one end of the 6th resistance R6, and the other end of the 6th resistance R6 is for connecting the second switching
Signal V2, the output end OUT of the anode connection three-terminal regulator chip U1 of first diode D1, the cathode of first diode D1 is used for
Connect tuner；Tuner (Low Noise Block, abbreviation LNB), i.e. low noise block downconverter, function is will be by feed
Ku or C-band signal are become L-band, send satellite to through coaxial cable by the satellite-signal of transmission by amplification and down coversion
Receiver.The cathode of one end connection first diode D1 of 4th capacitor C4, the other end ground connection of the 4th capacitor C4.Two or two pole
The anode of pipe D2 connects DC source, the input terminal IN of the cathode connection three-terminal regulator chip U1 of the second diode D2.Third capacitor
The input terminal IN of one end connection three-terminal regulator chip U1 of C3, the other end ground connection of third capacitor C3.
LM317T specifically can be selected in three-terminal regulator chip U1.First switching signal is specially polarization mode switching signal；Pole
Change mode switch include: it is left-handed, right-hand polarization mode switches.Second switching signal is DiSEqC switching signal.DiSEqC is English
The abbreviation of literary " Digital satellite Equipment Control ", literal translates as " digital satellite equipment control ".
DiSEqC switching signal for four cut a switch or eight cut the satellites such as a switch switching switch.DiSEqC switching signal may be implemented
More satellite receptions.Four, which cut a switch, may be implemented four satellite receptions.
Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to
In this, anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in variation
Or replacement, it should be covered within the scope of the utility model.Therefore, the protection scope of the utility model should be with the power
Subject to the protection scope that benefit requires.
Claims (6)
1. a kind of control switching circuit characterized by comprising three-terminal regulator chip, first resistor, second resistance, third electricity
Resistance, the 4th resistance, the 5th resistance, the 6th resistance, first capacitor, the second capacitor, triode, first diode；First electricity
One end of one end of resistance, one end of the second resistance and the first capacitor is all connected with the base stage of the triode；It is described
The other end of first resistor is for connecting the first switching signal；The other end of the second resistance, the first capacitor it is another
The emitter of end and the triode is grounded；The collector of the triode connects one end of the 3rd resistor；It is described
The other end of 3rd resistor connects the adjustable side of the three-terminal regulator chip；It is steady that one end of 4th resistance connects three end
Press the adjustable side of chip, the other end ground connection of the 4th resistance；One end of 5th resistance connects the three-terminal voltage-stabilizing core
The other end of the adjustable side of piece, the 5th resistance connects the output end of the three-terminal regulator chip；The one of second capacitor
End connects the adjustable side of the three-terminal regulator chip, and the other end of second capacitor connects one end of the 6th resistance, institute
The other end for stating the 6th resistance connects the three-terminal voltage-stabilizing core for connecting the second switching signal, the anode of the first diode
The output end of piece, the cathode of the first diode is for connecting tuner；The input terminal connection of the three-terminal regulator chip is straight
Stream source.
2. control switching circuit as described in claim 1, which is characterized in that further include: third capacitor and the 4th capacitor；It is described
One end of third capacitor connects the input terminal of the three-terminal regulator chip, the other end ground connection of the third capacitor；Described 4th
One end of capacitor connects the cathode of the first diode, the other end ground connection of the 4th capacitor.
3. control switching circuit as described in claim 1, which is characterized in that further include: the second diode；Two or two pole
The anode of pipe connects the DC source, and the cathode of second diode connects the input terminal of the three-terminal regulator chip.
4. control switching circuit as described in claim 1, which is characterized in that the three-terminal regulator chip selects LM317T.
5. control switching circuit as described in claim 1, which is characterized in that first switching signal is polarization mode switching
Signal；Second switching signal is DiSEqC switching signal.
6. a kind of receiver, which is characterized in that including control switching circuit described in claim 1-5 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920868527.4U CN209710217U (en) | 2019-06-08 | 2019-06-08 | Control switching circuit and receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920868527.4U CN209710217U (en) | 2019-06-08 | 2019-06-08 | Control switching circuit and receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209710217U true CN209710217U (en) | 2019-11-29 |
Family
ID=68651477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920868527.4U Expired - Fee Related CN209710217U (en) | 2019-06-08 | 2019-06-08 | Control switching circuit and receiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209710217U (en) |
-
2019
- 2019-06-08 CN CN201920868527.4U patent/CN209710217U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20191129 |