CN203217411U - Low-voltage stabilized power supply - Google Patents
Low-voltage stabilized power supply Download PDFInfo
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- CN203217411U CN203217411U CN 201320111542 CN201320111542U CN203217411U CN 203217411 U CN203217411 U CN 203217411U CN 201320111542 CN201320111542 CN 201320111542 CN 201320111542 U CN201320111542 U CN 201320111542U CN 203217411 U CN203217411 U CN 203217411U
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Abstract
The utility model discloses a low-voltage stabilized power supply which comprises a control transistor circuit and a feedback circuit connected with the control transistor circuit, wherein the feedback circuit is used for controlling voltage drop of the control transistor circuit, the control transistor circuit comprises an output transistor circuit and an overcurrent protection circuit connected with the output transistor circuit, the feedback circuit comprises a voltage amplifying circuit, an error amplifier and a reference voltage circuit, the input end of the voltage amplifying circuit is connected with the voltage output end of the control transistor circuit, the output end of the voltage amplifying circuit is connected with the inverted input end of the error amplifier, the reference voltage circuit is connected with the in-phase input end of the error amplifier, and the output end of the error amplifier is connected with the output transistor circuit. According to the low-voltage stabilized power supply, the feedback circuit is used for dynamically regulating the voltage drop of the control transistor circuit, and therefore, a power supply lower than a reference voltage can be generated under the condition of no need of dual power supplies or a special chip.
Description
Technical field
The utility model relates to electronic technology field, especially, relates to a kind of low-voltage regulated power supply.
Background technology
In Circuits System, power supply is an indispensable most important part, along with the development of modern integrated circuits, the function of chip from strength to strength, integrated level is more and more higher, thereby causes the power of chip also to become increasing.For make chip not reason heating damage, need the power supply of lower supply voltage, particularly CPU, now be reduced to 1.0V, and along with the development of chip, voltage may can drop to also lower.Existing general linear voltage regulator, because its reference voltage is all higher, be example with general linear voltage regulator circuit design, output voltage can not be lower than reference voltage, linear voltage regulator commonly used, as LM1117, LM317 etc., reference voltage is 1.25V, dedicated fiducial source TL431 is 2.5V, and they all can not satisfy existing LVPS requirement.Therefore, need a kind of new circuit, produce LVPS.
One of method that produces low-voltage is to select the voltage stabilizing chip of low reference voltage for use at present, perhaps select low pressure reference voltage chip for use, but be to use the obstructed integrated circuit of using, after circuit design is intact, can only use a kind of chip, price is expensive, and does not purchase, and limited by reference voltage, can not produce more voltage; Another kind method is to add negative supply in power supply, divider resistance is connected between power supply and the negative supply, but this method circuit structure complexity influences circuit reliability and cost.In addition, above-mentioned two kinds of existing methods can cause power supply ripple bigger, and negative supply also can be introduced the noise in the negative supply, and low reference voltage can be affected by noise bigger.
The utility model content
The utility model provides a kind of low-voltage regulated power supply, and this power supply is not needing special chip, does not need just can produce the voltage that is lower than reference voltage under the situation of dual power supply.
The low-voltage regulated power supply that the utility model embodiment provides comprises the control transistor circuit, and the feedback circuit that is connected with described control transistor circuit; Described feedback circuit is used for the pressure drop of the described control transistor circuit of control;
Described control transistor circuit comprises output transistor circuit, and the current foldback circuit that is connected with described output transistor circuit;
Described feedback circuit comprises voltage amplifier circuit, error amplifier and reference voltage circuit;
The input end of described voltage amplifier circuit connects the voltage output end of described control transistor circuit, the output terminal of described voltage amplifier circuit connects the inverting input of described error amplifier, described reference voltage circuit connects the in-phase input end of described error amplifier, and the output terminal of described error amplifier connects described output transistor circuit.
In above-mentioned control transistor circuit, described output transistor circuit comprises first triode, second triode and constant current source, and described current foldback circuit comprises first resistance, second resistance, the 3rd resistance and the 3rd triode;
One end of described constant current source connects the voltage input end of described control transistor circuit, the other end of described constant current source connects the base stage of described second triode, the collector of described second triode connects the voltage input end of described control transistor circuit, the emitter of described second triode connects the base stage of described first triode, the collector of described first triode connects the collector of described second triode, one end of described first resistance connects the emitter of described first triode, the other end of described first resistance connects the voltage output end of described control transistor circuit, one end of described second resistance connects the emitter of described first triode, the other end of described second resistance connects the base stage of described the 3rd triode, one end of described the 3rd resistance connects the base stage of described the 3rd triode, the other end ground connection of described the 3rd resistance, the collector of described the 3rd triode connects the base stage of described second triode, the emitter of described the 3rd triode connects the voltage output end of described control transistor circuit, the base stage of described second triode also connects the output terminal of described error amplifier, and the voltage output end of described control transistor circuit is used for connecting load.
In above-mentioned control transistor circuit, described reference voltage circuit comprises the 4th triode, the 5th triode, the 4th resistance, the 5th resistance, the 6th resistance and first operational amplifier, one end of described the 6th resistance connects the voltage output end of described reference voltage circuit, the other end of described the 6th resistance connects the collector of described the 5th triode, one end of described the 5th resistance connects the node between the voltage output end of described the 6th resistance and described reference voltage circuit, the other end of described the 5th resistance connects an end of described the 4th resistance, the other end of described the 4th resistance connects the collector of described the 4th triode, the base stage of described the 4th triode is connected with collector, the grounded emitter of described the 4th triode, the direction input end of described first operational amplifier connects the node between described the 4th resistance and described the 5th resistance, the in-phase input end of described first operational amplifier connects the node between the collector of described the 6th resistance and described the 5th triode, the base stage of described the 5th triode is connected with collector, the grounded emitter of described the 5th triode, the output terminal of described first operational amplifier connects the voltage output end of described reference voltage circuit, and the voltage output end of described reference voltage circuit connects the in-phase input end of described error amplifier.
In above-mentioned control transistor circuit, described voltage amplifier circuit comprises the 7th resistance, the 8th resistance, the 9th resistance and second operational amplifier, one end of described the 7th resistance connects the voltage output end of described control transistor circuit, the other end of described the 7th resistance connects the in-phase input end of described second operational amplifier, one end ground connection of described the 8th resistance, the other end of described the 8th resistance connects the inverting input of described second operational amplifier, one end of described the 9th resistance connects the inverting input of described second operational amplifier, the other end of described the 9th resistance connects the output terminal of described second operational amplifier, and the output terminal of described second operational amplifier also connects the inverting input of described error amplifier.
In above-mentioned control transistor circuit, described control transistor circuit, error amplifier, reference voltage circuit are integrated at voltage stabilizing chip internal commonly used.
The low-voltage regulated power supply that another embodiment of the utility model provides comprises the control transistor circuit, and the feedback circuit that is connected with described control transistor circuit; Described feedback circuit is used for the pressure drop of the described control transistor circuit of control;
Described control transistor circuit comprises switching transistor, and the energy storage filtering circuit that is used for energy storage filtering that is connected with described switching transistor;
Described feedback circuit comprises voltage-multiplying circuit, bleeder circuit, error amplifier, PWM wave generation circuit and is used for providing the reference voltage circuit of reference voltage;
The input end of described voltage-multiplying circuit connects the voltage output end of described control transistor circuit, the output terminal of described voltage-multiplying circuit connects the input end of described bleeder circuit, the output terminal of described bleeder circuit connects the inverting input of described error amplifier, described reference voltage circuit connects the in-phase input end of described error amplifier, the output terminal of described error amplifier connects the input end of described PWM wave generation circuit, and the output terminal of described PWM wave generation circuit connects described switching transistor.
Preferably, described PWM wave generation circuit comprises triangular-wave generator and voltage comparator;
Described triangular-wave generator connects the in-phase input end of described voltage comparator, and the inverting input of described voltage comparator connects the output terminal of described error amplifier, and the output terminal of described voltage comparator connects the base stage of described switching transistor.
The utility model is dynamically adjusted the pressure drop of control transistor circuit by feedback circuit, thereby can not need special chip, and does not need just can produce the power supply that is lower than reference voltage under the situation of dual power supply.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the utility model embodiment, to do to introduce simply to the accompanying drawing of required use among the embodiment below, apparently, accompanying drawing in describing below is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structure principle chart of the low-voltage regulated power supply that provides of the utility model embodiment;
Fig. 2 is the circuit diagram of control transistor circuit in the low-voltage regulated power supply that provides of the utility model embodiment;
Fig. 3 is the circuit diagram of reference voltage circuit in the low-voltage regulated power supply that provides of the utility model embodiment;
Fig. 4 is the circuit diagram of voltage amplifier circuit in the low-voltage regulated power supply that provides of the utility model embodiment;
Fig. 5 is the structure principle chart of the low-voltage regulated power supply that provides of another embodiment of the utility model;
Fig. 6 is the structure principle chart of PWM wave generation circuit in the low-voltage regulated power supply that provides of another embodiment of the utility model.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
Fig. 1 shows the structure principle chart of the low-voltage regulated power supply that the utility model embodiment provides.This low-voltage regulated power supply comprises control transistor circuit 11 and feedback circuit; Feedback circuit is used for the pressure drop of control transistor circuit 11 is controlled, and feedback circuit comprises voltage amplifier circuit 12, reference voltage circuit 13 and error amplifier 14; The input end of voltage amplifier circuit 12 connects the voltage output end of control transistor circuit 11, the output terminal of voltage amplifier circuit 12 connects the inverting input of error amplifier 14, reference voltage circuit 13 connects the in-phase input end of error amplifier 14, reference voltage circuit 13 is used for providing reference voltage, i.e. reference voltage Vref on the in-phase input end of error amplifier 14; The output terminal of error amplifier 14 connects control transistor circuit 11; Control transistor circuit 11, error amplifier 14, reference voltage circuit 13 can be integrated at voltage stabilizing chip internal commonly used.
The circuit diagram of control transistor circuit 11 is controlled transistor circuit 11 and is comprised output transistor circuit as shown in Figure 2, and the current foldback circuit that is connected with output transistor circuit; Output transistor circuit comprises the first triode Q1, second triode Q2 and the constant current source, and current foldback circuit comprises first resistance R 1, second resistance R 2, the 3rd resistance R 3 and the 3rd triode Q3.
Constant current source can provide electric current I s, one end of constant current source connects the voltage input end of control transistor circuit 1, the other end of constant current source connects the base stage of the second triode Q2, the collector of the second triode Q2 connects the voltage input end of control transistor circuit 11, the emitter of the second triode Q2 connects the base stage of the first triode Q1, the collector of the first triode Q1 connects the collector of the second triode Q2, one end of first resistance R 1 connects the emitter of the first triode Q1, the other end of first resistance R 1 connects the voltage output end of control transistor circuit 11, one end of second resistance R 2 connects the emitter of the first triode Q1, the other end of second resistance R 2 connects the base stage of the 3rd triode Q3, one end of the 3rd resistance R 3 connects the base stage of the 3rd triode Q2, the other end ground connection of the 3rd resistance R 3, the collector of the 3rd triode Q3 connects the base stage of the second triode Q2, the emitter of the 3rd triode Q3 connects the voltage output end of control transistor circuit 11, the base stage of the second triode Q2 also connects the output terminal of error amplifier 14, and the voltage output end of control transistor circuit 11 is used for connecting load RL.
The circuit diagram of reference voltage circuit 13 as shown in Figure 3, reference voltage circuit 13 comprises the 4th triode Q4, the 5th triode Q5, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6 and the first operational amplifier U1, one end of the 6th resistance R 6 connects the voltage output end of reference voltage circuit 13, the other end of the 6th resistance R 6 connects the collector of the 5th triode Q5, one end of the 5th resistance R 5 connects the node between the voltage output end of the 6th resistance R 6 and reference voltage circuit 13, the other end of the 5th resistance R 5 connects an end of the 4th resistance R 4, the other end of the 4th resistance R 4 connects the collector of the 4th triode Q4, the base stage of the 4th triode Q4 is connected with collector, the grounded emitter of the 4th triode Q4, the direction input end of the first operational amplifier U1 connects the node between the 4th resistance R 4 and the 5th resistance R 5, the in-phase input end of the first operational amplifier U1 connects the node between the collector of the 6th resistance R 6 and the 5th triode Q5, the base stage of the 5th triode Q5 is connected with collector, the grounded emitter of the 5th triode Q5, the output terminal of the first operational amplifier U1 connects the voltage output end of reference voltage circuit 13, and the voltage output end of reference voltage circuit 13 connects the in-phase input end of error amplifier 14.
The circuit diagram of voltage amplifier circuit 12 as shown in Figure 4, voltage amplifier circuit 12 comprises the 7th resistance R 8, the 8th resistance R 8, the 9th resistance R 9 and the second operational amplifier U2, one end of the 7th resistance R 7 connects the voltage output end of control transistor circuit 11, the other end of the 7th resistance R 7 connects the in-phase input end of the second operational amplifier U2, one end ground connection of the 8th resistance R 8, the other end of the 8th resistance R 8 connects the inverting input of the second operational amplifier U2, one end of the 9th resistance R 9 connects the inverting input of the second operational amplifier U2, the other end of the 9th resistance R 9 connects the output terminal of the second operational amplifier U2, and the output terminal of the second operational amplifier U2 also connects the inverting input of error amplifier 14.
The concrete principle of work of low-voltage regulated power supply shown in Figure 1 is as follows: control transistor circuit 11 produces pressure drop, make the voltage Vin of input drop to required voltage Vout, the voltage of output is Vfb after voltage amplifier circuit 12 amplifies, the reference voltage that Vfb is input to error amplifier 14 and reference voltage circuit 13 to be provided compares, signal relatively is input in the control transistor circuit 11 again, so that the pressure drop of control transistor circuit 11 is controlled, make the stable voltage of its output.When the output voltage of control transistor circuit 11 is higher, feedback voltage can be higher than reference voltage, error amplifier 14 can absorb the electric current in the sad stream source of controlling in the transistor circuit 11, electric current in the control transistor circuit 11 is reduced, pressure drop increases, thereby reduces the output voltage of control transistor circuit 11; Otherwise if the output voltage of control transistor circuit 11 is on the low side, control transistor circuit 11 can reduce pressure drop, thereby increases output voltage.The entire circuit of low-voltage regulated power supply of the present utility model is in dynamically adjusting, with the low-voltage that realizes that output is stable.
Fig. 5 show low-voltage regulated power supply that another embodiment of the utility model provides structure principle chart.In this embodiment, the control transistor circuit of low-voltage regulated power supply comprises switching transistor 51, and the energy storage filtering circuit 52 that is used for energy storage filtering that is connected with switching transistor 51; The voltage input end of control transistor circuit, switching transistor 51, energy storage filtering circuit 52 and the voltage output end of control transistor circuit are connected in turn.The feedback circuit of the low-voltage regulated power supply among this embodiment comprises voltage-multiplying circuit 53, bleeder circuit 54, error amplifier 56, pulse-length modulation (PWM) wave generation circuit 57 and is used for providing the reference voltage circuit 55 of reference voltage.
The input end of voltage-multiplying circuit 53 connects the voltage output end of control transistor circuit, the output terminal of voltage-multiplying circuit 53 connects the input end of bleeder circuit 54, the output terminal of bleeder circuit 54 connects the inverting input of error amplifier 56, reference voltage circuit 55 connects the in-phase input end of error amplifier 56, the output terminal of error amplifier 56 connects the input end of PWM wave generation circuit 57, and the output terminal of PWM wave generation circuit 57 connects switching transistor 51.
The concrete structure of PWM wave generation circuit 57 is seen Fig. 6, and PWM wave generation circuit 57 comprises triangular-wave generator 571 and voltage comparator 572; Triangular-wave generator 571 connects the in-phase input end of voltage comparator 572, and the inverting input of voltage comparator 572 connects the output terminal of error amplifier 56, and the output terminal of voltage comparator 572 connects the base stage of switching transistor 51.
The concrete principle of work of low-voltage regulated power supply shown in Figure 5 is as follows: input voltage vin produces output voltage V out through switching transistor 51 and energy storage filtering circuit 52 backs, output voltage V out amplifies through voltage-multiplying circuit 53, again through after bleeder circuit 54 samplings, can obtain feedback voltage Vfb, then error amplifier 56 reference voltage that feedback voltage Vfb and reference voltage circuit 55 are provided compare and the fault in enlargement signal after, error signal is sent into PWM wave generation circuit 57; In PWM wave generation circuit 57, voltage comparator 572 compares the triangular signal of error signal and triangular-wave generator 571 generations, with the pwm control signal of output suitable duty ratio to the base stage of switching transistor 51, thereby can pass through the PWM ripple duty on off state of gauge tap transistor 51 recently; Switching transistor 51 exportable PWM ripple signals behind the inductance capacitor filtering in energy storage filtering circuit 52, are exported stable low-voltage.
It is pointed out that the utility model not only can be applicable to linear stabilized power supply as shown in Figure 1, low voltage DC-DC power supply shown in Figure 5, can also be applied in any power sources such as AC-DC Switching Power Supply.
The above is preferred embodiment of the present utility model only, is not limited to the utility model, all any modifications of making within spirit of the present utility model and principle, is equal to and replaces and improvement etc., all should be included in the protection domain of the present utility model.
Claims (7)
1. a low-voltage regulated power supply is characterized in that, described power supply comprises the control transistor circuit, and the feedback circuit that is connected with described control transistor circuit; Described feedback circuit is used for the pressure drop of the described control transistor circuit of control;
Described control transistor circuit comprises output transistor circuit, and the current foldback circuit that is connected with described output transistor circuit;
Described feedback circuit comprises voltage amplifier circuit, error amplifier and reference voltage circuit;
The input end of described voltage amplifier circuit connects the voltage output end of described control transistor circuit, the output terminal of described voltage amplifier circuit connects the inverting input of described error amplifier, described reference voltage circuit connects the in-phase input end of described error amplifier, and the output terminal of described error amplifier connects described output transistor circuit.
2. low-voltage regulated power supply according to claim 1, it is characterized in that, described output transistor circuit comprises first triode, second triode and constant current source, and described current foldback circuit comprises first resistance, second resistance, the 3rd resistance and the 3rd triode;
One end of described constant current source connects the voltage input end of described control transistor circuit, the other end of described constant current source connects the base stage of described second triode, the collector of described second triode connects the voltage input end of described control transistor circuit, the emitter of described second triode connects the base stage of described first triode, the collector of described first triode connects the collector of described second triode, one end of described first resistance connects the emitter of described first triode, the other end of described first resistance connects the voltage output end of described control transistor circuit, one end of described second resistance connects the emitter of described first triode, the other end of described second resistance connects the base stage of described the 3rd triode, one end of described the 3rd resistance connects the base stage of described the 3rd triode, the other end ground connection of described the 3rd resistance, the collector of described the 3rd triode connects the base stage of described second triode, the emitter of described the 3rd triode connects the voltage output end of described control transistor circuit, the base stage of described second triode also connects the output terminal of described error amplifier, and the voltage output end of described control transistor circuit is used for connecting load.
3. low-voltage regulated power supply according to claim 1, it is characterized in that, described reference voltage circuit comprises the 4th triode, the 5th triode, the 4th resistance, the 5th resistance, the 6th resistance and first operational amplifier, one end of described the 6th resistance connects the voltage output end of described reference voltage circuit, the other end of described the 6th resistance connects the collector of described the 5th triode, one end of described the 5th resistance connects the node between the voltage output end of described the 6th resistance and described reference voltage circuit, the other end of described the 5th resistance connects an end of described the 4th resistance, the other end of described the 4th resistance connects the collector of described the 4th triode, the base stage of described the 4th triode is connected with collector, the grounded emitter of described the 4th triode, the direction input end of described first operational amplifier connects the node between described the 4th resistance and described the 5th resistance, the in-phase input end of described first operational amplifier connects the node between the collector of described the 6th resistance and described the 5th triode, the base stage of described the 5th triode is connected with collector, the grounded emitter of described the 5th triode, the output terminal of described first operational amplifier connects the voltage output end of described reference voltage circuit, and the voltage output end of described reference voltage circuit connects the in-phase input end of described error amplifier.
4. low-voltage regulated power supply according to claim 1, it is characterized in that, described voltage amplifier circuit comprises the 7th resistance, the 8th resistance, the 9th resistance and second operational amplifier, one end of described the 7th resistance connects the voltage output end of described control transistor circuit, the other end of described the 7th resistance connects the in-phase input end of described second operational amplifier, one end ground connection of described the 8th resistance, the other end of described the 8th resistance connects the inverting input of described second operational amplifier, one end of described the 9th resistance connects the inverting input of described second operational amplifier, the other end of described the 9th resistance connects the output terminal of described second operational amplifier, and the output terminal of described second operational amplifier also connects the inverting input of described error amplifier.
5. according to each described low-voltage regulated power supply in the claim 1～4, it is characterized in that described control transistor circuit, error amplifier, reference voltage circuit are integrated at voltage stabilizing chip internal commonly used.
6. a low-voltage regulated power supply is characterized in that, described power supply comprises the control transistor circuit, and the feedback circuit that is connected with described control transistor circuit; Described feedback circuit is used for the pressure drop of the described control transistor circuit of control;
Described control transistor circuit comprises switching transistor, and the energy storage filtering circuit that is used for energy storage filtering that is connected with described switching transistor;
Described feedback circuit comprises voltage-multiplying circuit, bleeder circuit, error amplifier, PWM wave generation circuit and is used for providing the reference voltage circuit of reference voltage;
The input end of described voltage-multiplying circuit connects the voltage output end of described control transistor circuit, the output terminal of described voltage-multiplying circuit connects the input end of described bleeder circuit, the output terminal of described bleeder circuit connects the inverting input of described error amplifier, described reference voltage circuit connects the in-phase input end of described error amplifier, the output terminal of described error amplifier connects the input end of described PWM wave generation circuit, and the output terminal of described PWM wave generation circuit connects described switching transistor.
7. low-voltage regulated power supply according to claim 6 is characterized in that, described PWM wave generation circuit comprises triangular-wave generator and voltage comparator;
Described triangular-wave generator connects the in-phase input end of described voltage comparator, and the inverting input of described voltage comparator connects the output terminal of described error amplifier, and the output terminal of described voltage comparator connects the base stage of described switching transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320111542 CN203217411U (en) | 2013-03-12 | 2013-03-12 | Low-voltage stabilized power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320111542 CN203217411U (en) | 2013-03-12 | 2013-03-12 | Low-voltage stabilized power supply |
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| CN203217411U true CN203217411U (en) | 2013-09-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320111542 Expired - Fee Related CN203217411U (en) | 2013-03-12 | 2013-03-12 | Low-voltage stabilized power supply |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105425886A (en) * | 2015-12-24 | 2016-03-23 | 昆山龙腾光电有限公司 | Voltage regulation circuit and programmable power source |
| CN106208767A (en) * | 2016-08-19 | 2016-12-07 | 天津市百利电气有限公司 | A kind of power supply of low pressure controller dynamic stability |
| CN108572280A (en) * | 2018-06-26 | 2018-09-25 | 中国工程物理研究院化工材料研究所 | A kind of large range high precision explosive device resistance tester |
-
2013
- 2013-03-12 CN CN 201320111542 patent/CN203217411U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105425886A (en) * | 2015-12-24 | 2016-03-23 | 昆山龙腾光电有限公司 | Voltage regulation circuit and programmable power source |
| CN105425886B (en) * | 2015-12-24 | 2017-05-10 | 昆山龙腾光电有限公司 | Voltage regulation circuit and programmable power source |
| CN106208767A (en) * | 2016-08-19 | 2016-12-07 | 天津市百利电气有限公司 | A kind of power supply of low pressure controller dynamic stability |
| CN108572280A (en) * | 2018-06-26 | 2018-09-25 | 中国工程物理研究院化工材料研究所 | A kind of large range high precision explosive device resistance tester |
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| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHENZHEN SKYWORTH DIGITAL TECHNOLOGY CO., LTD. Free format text: FORMER NAME: SKY-WORTH DIGITAL TECHNOLOGY CO., LTD.;SHENZHEN CITY |
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| CP01 | Change in the name or title of a patent holder |
Address after: 518000 Guangdong city of Shenzhen province Nanshan District Gao Xin Road Building A14, SKYWORTH Patentee after: Shenzhen Skyworth Digital Technology Co., Ltd. Address before: 518000 Guangdong city of Shenzhen province Nanshan District Gao Xin Road Building A14, SKYWORTH Patentee before: Shenzhen Skyworth Digital Technology Co., Ltd. |
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| 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: 20130925 Termination date: 20180312 |