CN203813659U - Satellite tuner power supply circuit - Google Patents
Satellite tuner power supply circuit Download PDFInfo
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- CN203813659U CN203813659U CN201420121881.8U CN201420121881U CN203813659U CN 203813659 U CN203813659 U CN 203813659U CN 201420121881 U CN201420121881 U CN 201420121881U CN 203813659 U CN203813659 U CN 203813659U
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- triode
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Abstract
The utility model discloses a satellite tuner power supply circuit. According to the satellite tuner power supply circuit, a major loop of the conventional satellite tuner power supply circuit is connected with resistors in series, and the current of an output terminal during short circuit can be greatly reduced so that devices of the major loop can be prevented from being damaged, the stability of circuit usage is improved, and the cost is relatively low. The satellite tuner power supply circuit comprises a triode Q1, a triode Q2, a triode Q3, a triode Q4, a triode Q5, a triode Q6, a triode Q7, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a capacitor C1, a capacitor C2, a polarity capacitor C, a diode D1, a diode D2, a tuner LNB and a resistor R10, one terminal of the resistor R10 is connected with a collector electrode of the triode Q5 and a cathode terminal of the diode D2, and the other terminal of the resistor R10 is connected with one terminal of the resistor R8, one terminal of the resistor R9, one terminal of the capacitor C2, and a power supply terminal of the tuner LNB.
Description
Technical field
The utility model relates to electronic circuit field, relates in particular to a kind of satellite low noise block power supply circuits.
Background technology
Tuner: being commonly called as tuner, is that television set is used for receiving high-frequency signal and a kind of device that demodulates video information, is also the Part I of public passage.The tuner that television set uses at present is generally divided into digital signal tuner and analog signal tuner.In brief, tuner is exactly the tuning and high-frequency signal amplifier receiving television signals.
Satellite low noise block need to be powered and could be used, and existing satellite low noise block power supply circuits mainly contain several modes: 1, realize by the device that boosts; 2, by low pressure difference linear voltage regulator (Low Dropout Regulator, LDO), direct voltage more than 24V is depressured to 13/18V to supplying power for tuner.But these two kinds of implementations all need higher cost, and existing satellite low noise block power supply circuits scheme, in the time of load end short circuit, caused large electric current is very easy to damage components and parts, thereby uses and all bring very large puzzlement to manufacturer production test link, terminal use.
For above problem, this programme is intended to reduce integrated circuit cost, and can efficiently solve impulse current and burn out the problem of loop device.
Utility model content
The utility model discloses a kind of satellite low noise block power supply circuits; by the mode of series resistance on the major loop at existing satellite low noise block power supply circuits; electric current can significantly reduce output short circuit time; thereby can protect major loop device not to be damaged; then improved the stability that circuit uses, and it is relatively low to realize cost.
The satellite low noise block power supply circuits that the utility model provides, comprising: triode Q1, triode Q2, triode Q3, triode Q4, triode Q5, triode Q6, triode Q7, resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 9, capacitor C 1, capacitor C 2, polar capacitor C, diode D1, diode D2 and tuner LNB, the base stage of described triode Q1 is connected with the switch terminals of described tuner LNB by described resistance R 1, the collector electrode of described triode Q1 is connected with the base stage of described triode Q2 by described resistance R 2, the emitter of described triode Q1 is connected with the emitter of described triode Q4 and the collector electrode of described triode Q7, the emitter of described triode Q2 is connected with voltage input end, the collector electrode of described triode Q2 is connected with the positive terminal of described diode D1, one end of the negative pole end of described diode D1 and described resistance R 3, the collector electrode of described triode Q3, the positive terminal of described polar capacitor C, one end of described capacitor C 1, the emitter of the positive terminal of described diode D2 and described triode Q5 is connected, the emitter of described triode Q3 is connected with the other end of voltage input end and described resistance R 3, the base stage of described triode Q3 is connected with the described collector electrode of stating triode Q4 by described resistance R 4, the base stage of described triode Q4 is connected with the frequency modulation end of described tuner LNB by described resistance R 5, the negative pole end of described polar capacitor C is connected with the other end of described capacitor C 1 and ground connection, the negative pole end of the collector electrode of described triode Q5 and described diode D2, one end of described resistance R 8, one end of described resistance R 9, the power end of one end of described capacitor C 2 and described tuner LNB is connected, the base stage of described triode Q5 is connected with the collector electrode of described triode Q6 by described resistance R 6, the base stage of described triode Q6 is connected with a certain frequency range of described tuner LNB by described resistance R 7, the grounded emitter of described triode Q6, the other end of described resistance R 8 is connected with the base stage of described triode Q7, the emitter of described triode Q7, the other end of described resistance R 9, the other end ground connection of described capacitor C 2,
Described circuit also comprises resistance R 10;
One end of described resistance R 10 is connected with the negative pole end of described diode D2 with the collector electrode of described triode Q5, and the other end of described resistance R 10 is connected with one end of described resistance R 8, one end, one end of described capacitor C 2 and the power end of described tuner LNB of described resistance R 9.
Alternatively,
The resistance of described resistance R 10 is not less than 3.6 ohm.
By the mode of series resistance on the major loop at existing satellite low noise block power supply circuits; electric current when satellite low noise block power supply circuits of the present utility model can significantly reduce output short circuit; thereby can protect major loop device not to be damaged; then improved the stability that circuit uses, and it is relatively low to realize cost.
Brief description of the drawings
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the circuit connection diagram of the utility model satellite low noise block power supply circuits.
Embodiment
The utility model discloses a kind of satellite low noise block power supply circuits; by the mode of series resistance on the major loop at existing satellite low noise block power supply circuits; electric current can significantly reduce output short circuit time; thereby can protect major loop device not to be damaged; then improved the stability that circuit uses, and it is relatively low to realize cost.
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is known and detailed description, obviously, described embodiment is only a part of embodiment of the present utility model, instead of whole embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making all other embodiment that obtain under creative work prerequisite, all belong to the scope of the utility model protection.Refer to Fig. 1, the satellite low noise block power supply circuits of the utility model embodiment, comprising: triode Q1, triode Q2, triode Q3, triode Q4, triode Q5, triode Q6, triode Q7, resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 9, capacitor C 1, capacitor C 2, polar capacitor C, diode D1, diode D2 and tuner LNB, the base stage of described triode Q1 is connected with the switch terminals of described tuner LNB by described resistance R 1, the collector electrode of described triode Q1 is connected with the base stage of described triode Q2 by described resistance R 2, the emitter of described triode Q1 is connected with the emitter of described triode Q4 and the collector electrode of described triode Q7, the emitter of described triode Q2 is connected with voltage input end, the collector electrode of described triode Q2 is connected with the positive terminal of described diode D1, one end of the negative pole end of described diode D1 and described resistance R 3, the collector electrode of described triode Q3, the positive terminal of described polar capacitor C, one end of described capacitor C 1, the emitter of the positive terminal of described diode D2 and described triode Q5 is connected, the emitter of described triode Q3 is connected with the other end of voltage input end and described resistance R 3, the base stage of described triode Q3 is connected with the described collector electrode of stating triode Q4 by described resistance R 4, the base stage of described triode Q4 is connected with the frequency modulation end of described tuner LNB by described resistance R 5, the negative pole end of described polar capacitor C is connected with the other end of described capacitor C 1 and ground connection, the negative pole end of the collector electrode of described triode Q5 and described diode D2, one end of described resistance R 8, one end of described resistance R 9, the power end of one end of described capacitor C 2 and described tuner LNB is connected, the base stage of described triode Q5 is connected with the collector electrode of described triode Q6 by described resistance R 6, the base stage of described triode Q6 is connected with a certain frequency range of described tuner LNB by described resistance R 7, the grounded emitter of described triode Q6, the other end of described resistance R 8 is connected with the base stage of described triode Q7, the emitter of described triode Q7, the other end of described resistance R 9, the other end ground connection of described capacitor C 2,
Described circuit also comprises resistance R 10;
One end of described resistance R 10 is connected with the negative pole end of described diode D2 with the collector electrode of described triode Q5, and the other end of described resistance R 10 is connected with one end of described resistance R 8, one end, one end of described capacitor C 2 and the power end of described tuner LNB of described resistance R 9.
The satellite low noise block power supply circuits of the utility model embodiment, before introducing resistance R 10, if output short circuit will cause larger impulse current, thereby damage triode Q2 and triode Q3, reaction, on terminal use, is exactly that satellite receiver can not normally be accepted program; After adding resistance R 10, due to the shunting action of resistance R 10, the impulse current of output short circuit can significantly reduce, thus can protect triode Q2 and triode Q3 not damaged, and then improve the circuit performance of satellite low noise block power supply circuits.
Alternatively,
The resistance of described resistance R 10 is not less than 3.6 ohm.
It should be noted that, in above-mentioned satellite low noise block power supply circuits, the design parameter of each electronic devices and components can be as follows:
Triode Q1, triode Q2, triode Q3, triode Q4, triode Q5, triode Q6 and triode Q7 respectively are: triode 3904, triode SS8550, triode 3904, triode 3904, triode SS8550, triode 3904 and triode 3904;
Resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 9 and resistance R 10 respectively are: 10K Ω, 3.3K Ω, 22K Ω, 4.7K Ω, 4.7K Ω, 4.7K Ω, 20K Ω, 1.1K Ω and 3.6 Ω;
Capacitor C 1, capacitor C 2, polar capacitor C, diode D1 and diode D2 respectively are: 0.1 μ F, 1 μ F, 47 μ F, in4002 and in4002.
When in the satellite low noise block power supply circuits of the utility model embodiment, electronic devices and components adopt above-mentioned parameter, before introducing resistance R 10, by the electric current of triode Q2 and triode Q3, up to 23.8A; After introducing resistance R 10, obviously drop to 5.24A by the electric current of triode Q2 and triode Q3, this impulse current is greatly improved, thereby has protected triode Q2 and triode Q3 not to be damaged.
By the mode of series resistance on the major loop at existing satellite low noise block power supply circuits; electric current when satellite low noise block power supply circuits of the present utility model can significantly reduce output short circuit; thereby can protect major loop device not to be damaged; then improved the stability that circuit uses, and it is relatively low to realize cost.
Above a kind of satellite low noise block power supply circuits provided by the utility model are described in detail, for one of ordinary skill in the art, according to the thought of the utility model embodiment, all will change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.
Claims (2)
1. satellite low noise block power supply circuits, is characterized in that, comprising: triode Q1, triode Q2, triode Q3, triode Q4, triode Q5, triode Q6, triode Q7, resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 9, capacitor C 1, capacitor C 2, polar capacitor C, diode D1, diode D2 and tuner LNB, the base stage of described triode Q1 is connected with the switch terminals of described tuner LNB by described resistance R 1, the collector electrode of described triode Q1 is connected with the base stage of described triode Q2 by described resistance R 2, the emitter of described triode Q1 is connected with the emitter of described triode Q4 and the collector electrode of described triode Q7, the emitter of described triode Q2 is connected with voltage input end, the collector electrode of described triode Q2 is connected with the positive terminal of described diode D1, one end of the negative pole end of described diode D1 and described resistance R 3, the collector electrode of described triode Q3, the positive terminal of described polar capacitor C, one end of described capacitor C 1, the emitter of the positive terminal of described diode D2 and described triode Q5 is connected, the emitter of described triode Q3 is connected with the other end of voltage input end and described resistance R 3, the base stage of described triode Q3 is connected with the described collector electrode of stating triode Q4 by described resistance R 4, the base stage of described triode Q4 is connected with the frequency modulation end of described tuner LNB by described resistance R 5, the negative pole end of described polar capacitor C is connected with the other end of described capacitor C 1 and ground connection, the negative pole end of the collector electrode of described triode Q5 and described diode D2, one end of described resistance R 8, one end of described resistance R 9, the power end of one end of described capacitor C 2 and described tuner LNB is connected, the base stage of described triode Q5 is connected with the collector electrode of described triode Q6 by described resistance R 6, the base stage of described triode Q6 is connected with a certain frequency range of described tuner LNB by described resistance R 7, the grounded emitter of described triode Q6, the other end of described resistance R 8 is connected with the base stage of described triode Q7, the emitter of described triode Q7, the other end of described resistance R 9, the other end ground connection of described capacitor C 2, is characterized in that, described circuit also comprises resistance R 10,
One end of described resistance R 10 is connected with the negative pole end of described diode D2 with the collector electrode of described triode Q5, and the other end of described resistance R 10 is connected with one end of described resistance R 8, one end, one end of described capacitor C 2 and the power end of described tuner LNB of described resistance R 9.
2. satellite low noise block power supply circuits according to claim 1, is characterized in that, the resistance of described resistance R 10 is not less than 3.6 ohm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420121881.8U CN203813659U (en) | 2014-03-18 | 2014-03-18 | Satellite tuner power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420121881.8U CN203813659U (en) | 2014-03-18 | 2014-03-18 | Satellite tuner power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203813659U true CN203813659U (en) | 2014-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420121881.8U Expired - Lifetime CN203813659U (en) | 2014-03-18 | 2014-03-18 | Satellite tuner power supply circuit |
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| Country | Link |
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| CN (1) | CN203813659U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107888177A (en) * | 2017-11-22 | 2018-04-06 | 西安电子科技大学 | IC interior offset correction circuit |
| CN109037960A (en) * | 2018-08-10 | 2018-12-18 | 宁波耀德成智能科技有限公司 | Satellite antenna tuner polarizing voltage adjusts device |
-
2014
- 2014-03-18 CN CN201420121881.8U patent/CN203813659U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107888177A (en) * | 2017-11-22 | 2018-04-06 | 西安电子科技大学 | IC interior offset correction circuit |
| CN107888177B (en) * | 2017-11-22 | 2020-07-07 | 西安电子科技大学 | Integrated circuit internal bias correction circuit |
| CN109037960A (en) * | 2018-08-10 | 2018-12-18 | 宁波耀德成智能科技有限公司 | Satellite antenna tuner polarizing voltage adjusts device |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140903 |