CN103135648A - Low dropout regulator - Google Patents
Low dropout regulator Download PDFInfo
- Publication number
- CN103135648A CN103135648A CN2013100895407A CN201310089540A CN103135648A CN 103135648 A CN103135648 A CN 103135648A CN 2013100895407 A CN2013100895407 A CN 2013100895407A CN 201310089540 A CN201310089540 A CN 201310089540A CN 103135648 A CN103135648 A CN 103135648A
- Authority
- CN
- China
- Prior art keywords
- resistor
- breakover element
- resistance
- error amplifier
- output terminal
- 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.)
- Granted
Links
Images
Landscapes
- Continuous-Control Power Sources That Use Transistors (AREA)
Abstract
The invention relates to a low dropout regulator. The low dropout regulator comprises a feedback circuit, a reference voltage unit which is connected with the cathode of an error amplifier. A control end of a first on-element in the feedback circuit is connected with an output end of the error amplifier. An input end of the first on-element and an output end of the first on-element are respectively connected with a power supply and an output end of the regulator. A resistor branch and a circumscribed capacitor branch are connected between the output end of the regulator and ground in parallel. The resistor branch is provided with a first resistor and a second resistor. The first resistor and the second resistor are in series. The anode of the error amplifier is connected with the first resistor and the second resistor. The first resistor and the second resistor feed back signals. An output end of a second on-element is connected with the ground through a third resistor. An input end of the second on-element is connected with the output end of the regulator, and a control end of the second on-element is connected with the output end of the error amplifier. The problems that transmission voltage fluctuation is too large and stable time is too long caused by load current saltus step of the low dropout regulator are solved, static power consumption increase is reduced to a maximized degree, the circuit structure is simple, transient response speed and precision of low dropout regulator (LDO) circuits are greatly improved.
Description
Technical field
The present invention relates to integrated circuit, is a kind of circuit structure of low pressure difference linear voltage regulator (Low Dropout Regulator, LDO) of quick response concretely.
Background technology
Along with the develop rapidly of electronic technology, various portable electronics play, show more clearly that to multimedia data stream, audio frequency demands such as reaching more amusements constantly promotes, and power management scheme seems more and more important efficiently.Low pressure difference linear voltage regulator (LDO) is low because of its cost, encapsulation is easy, few, the ultralow characteristics such as noise, high PSRR and little power consumption of peripherals become one of power solution that has competitive power.
Traditional LDO has comprised reference voltage unit Vref, error amplifier EA, feedback circuit 100 as shown in Figure 1, external capacitor C, the output end vo ut of voltage stabilizer and input power Vin.
Wherein, reference voltage unit Vref is band-gap reference circuit.Feedback circuit 100 is comprised of resistance R 1 and resistance R 2, the PMOS adjustment pipe MP of feedback series connection.
Feedback signal Vfb is taken between resistance R 1 and resistance R 2, and receives the positive input of error amplifier EA.Because it is exactly sign-changing amplifier that PMOS adjusts pipe itself, so receiving the positive input of error amplifier EA, feedback signal consists of feedback loop.The reference voltage that band-gap reference produces is received error amplifier EA negative input.The grid that PMOS adjusts pipe is received in the output of error amplifier EA.PMOS adjusts the source electrode of pipe MP as input, receives input power Vin end, receives the output end vo ut of the voltage stabilizer of LDO together with the end of drain electrode and external capacitor C.Error amplifier EA, P type field effect transistor MP and feedback resistance R1, R2 have formed the feedback loop of LDO together, are used for regulated output voltage.If ignore the gain error of LDO, can obtain output voltage:
When load current is jumped to heavy duty or jumped to underloading by heavy duty by underloading, to be load current by little unexpected change large or by reducing greatly suddenly, because bound-time is short, and the limited bandwidth of LDO, can produce voltage overshoot at output terminal, and output stablize time of needs from fluctuate to can be more of a specified duration, the feedback loop of LDO itself and limited output bandwidth be with can't the fast and stable transmission voltage, thereby rear one-level circuit can't be worked.
At present, industry has gone out the scheme of many raising LDO transient responses, such as adopting the BUFFER(buffer memory) the level spread bandwidth etc., although these schemes can arrive certain effect, their defective is the circuit structure more complicated, and has increased extra power consumption.
Summary of the invention
The invention provides a kind of low pressure difference linear voltage regulator, when solving low pressure difference linear voltage regulator load saltus step cause that output voltage saltus step fluctuation is excessive and from fluctuation to long problem stabilization time, simplify as much as possible circuit structure simultaneously and reduce the increase of power consumption.
low pressure difference linear voltage regulator of the present invention, comprise feedback circuit and the reference voltage unit that is connected with the error amplifier negative pole, has the first breakover element in feedback circuit, the control end of described the first breakover element is connected with the output terminal of error amplifier, the input termination power of the first breakover element, output terminal connects the output terminal of described voltage stabilizer, also be parallel with resistance branch and external capacitive branch between the output terminal of voltage stabilizer and ground, the first resistance and the second resistance that series connection is arranged in resistance branch, go out from tap between the first resistance and the second resistance the positive pole that feedback signal is connected to described error amplifier, electric capacity is arranged in capacitive branch, the output terminal of voltage stabilizer also is connected with the input end of the second breakover element, the control end of the second breakover element is connected to the output terminal of error amplifier, and the output terminal of the second breakover element is by the 3rd resistance eutral grounding.
When the LDO(low pressure difference linear voltage regulator) load current when larger increase occurs at short notice, output voltage is reduced rapidly, feedback voltage also can reduce rapidly, amplify the signal that changes by error amplifier, the error amplifier output terminal also can reduce, i.e. the control end lower voltage of the control end voltage of the first breakover element and the second breakover element.At this moment, the electric current that flows through the first breakover element increases, the electric current that flows through the second breakover element reduces, the electric current that the electric current that the first breakover element increases and the second breakover element reduce has flow into the output terminal of voltage stabilizer simultaneously, compensate load current and increased the electric current that consumes, two breakover elements have suppressed simultaneously load current and have increased at short notice and cause that output voltage reduces, and have accelerated the stable of stabilizer output voltage.
On the contrary, when larger reducing occured at short notice, stabilizer output voltage increased rapidly when the load current of LDO, and feedback voltage also increases rapidly, the error amplifier output terminal also can increase, and namely the control end voltage of the control end voltage of the first breakover element and the second breakover element increases.At this moment, the electric current that flows through the first breakover element reduces, the electric current that flows through the second breakover element increases, it is the electric current that reduced by the first breakover element on the one hand of the electric current that reduces of load and absorbing, the current drain that is increased by the second breakover element has simultaneously been fallen, two breakover elements have suppressed simultaneously load current and have reduced at short notice and cause that output voltage increases, and have accelerated the stable of stabilizer output voltage.
Preferably, described the first breakover element and the second breakover element are field effect transistor.According to different needs and occasion, can be also other similar element, as triode etc.
Concrete, described the first breakover element is P type field effect transistor, the second breakover element is the N-type field effect transistor.If the type of the first breakover element and the second breakover element changes, can do corresponding adjustment to circuit structure according to the ultimate principle of electricity field.
Concrete, described the 3rd resistance is variable resistor.Can control the voltage of the second breakover element output terminal by regulating the 3rd resistance sizes, thus the size of current of this branch road of can regulating and controlling flowing through.Satisfying under the prerequisite that output voltage is required, by regulating the 3rd resistance, make the electric current that flows through the second breakover element when stable state as far as possible little, thereby maximize the increase that has reduced the LDO quiescent dissipation.
Low pressure difference linear voltage regulator of the present invention, when having solved the saltus step of low pressure difference linear voltage regulator load current, caused transmission of electricity presses fluctuation excessive and from fluctuation to long problem stabilization time, when satisfying the output voltage requirement, compare with other circuit that improves the LDO transient response, reduced the quiescent dissipation of circuit, and circuit structure is more simple, and power consumption is lower, has improved greatly transient response speed and the precision of LDO circuit.
Below in conjunction with the embodiment of embodiment, foregoing of the present invention is described in further detail again.But this should be interpreted as that the scope of the above-mentioned theme of the present invention only limits to following example.Do not breaking away from the above-mentioned technological thought situation of the present invention, various replacements or change according to ordinary skill knowledge and customary means are made all should comprise within the scope of the invention.
Description of drawings
Fig. 1 is the circuit diagram of conventional low difference linear constant voltage regulator.
Fig. 2 is the circuit diagram of low pressure difference linear voltage regulator of the present invention.
Embodiment
Low pressure difference linear voltage regulator of the present invention (LDO), comprise feedback circuit 100 and the reference voltage unit Vref that is connected with error amplifier EA negative pole as shown in Figure 2, and reference voltage unit Vref is band-gap reference circuit.Feedback circuit 100 is made of P type metal-oxide-semiconductor structure the first breakover element MP, the first resistance R 1 and the second resistance R 2.The grid of described the first breakover element MP is connected with the output terminal of error amplifier EA, and the source electrode of the first breakover element MP meets power supply Vin, and drain electrode connects the output end vo ut of described voltage stabilizer.Also be parallel with resistance branch and external capacitive branch between the output end vo ut of voltage stabilizer and ground.The first resistance R 1 and the second resistance R 2 that series connection is arranged in resistance branch go out from tap between the first resistance R 1 and the second resistance R 2 positive pole that feedback signal Vfb is connected to described error amplifier EA.Capacitor C is arranged in capacitive branch.The output end vo ut of voltage stabilizer also is connected with the drain electrode of the second breakover element MN of N-type metal-oxide-semiconductor structure, and the grid of the second breakover element MN is connected to the output terminal of error amplifier EA, and the source electrode of the second breakover element MN is by the 3rd resistance R 3 ground connection.The 3rd resistance R 3 is variable resistor.
Consisted of charge discharging resisting circuit 200 by the second breakover element MN and the 3rd resistance R 3, and can be by regulating the 3rd resistance R 3 sizes, control the voltage of the second breakover element MN source electrode of N-type metal-oxide-semiconductor, the size of current of charge discharging resisting circuit 200 thereby regulating and controlling is flowed through.Satisfying under the prerequisite that output voltage is required, by regulating the 3rd resistance R 3, make the electric current that flows through the second breakover element MN when stable state as far as possible little, thereby maximize the increase that has reduced the LDO quiescent dissipation.
When larger increase occurs in the load current of LDO at short notice, output voltage is reduced rapidly, feedback voltage also can reduce rapidly, amplify the signal that changes by error amplifier EA, error amplifier EA output terminal also can reduce, and namely the grid voltage of the grid voltage of the first breakover element MP and the second breakover element MN reduces.At this moment, the electric current that flows through the first breakover element MP increases, the electric current that flows through the second breakover element MN reduces, the electric current that the electric current that the first breakover element MP increases and the second breakover element MN reduce has flow into the output end vo ut of voltage stabilizer simultaneously, compensate load current and increased the electric current that consumes, two breakover elements have suppressed simultaneously load current and have increased at short notice and cause that output voltage reduces, and have accelerated the stable of stabilizer output voltage.
On the contrary, when larger reducing occured at short notice, stabilizer output voltage increased rapidly when the load current of LDO, and feedback voltage also increases rapidly, error amplifier EA output terminal also can increase, and namely the grid voltage of the grid voltage of the first breakover element MP and the second breakover element MN increases.At this moment, the electric current that flows through the first breakover element MP reduces, the electric current that flows through the second breakover element MN increases, it is the electric current that reduced by the first breakover element MP on the one hand of the electric current that reduces of load and absorbing, the current drain that is increased by the second breakover element MN has simultaneously been fallen, two breakover elements have suppressed simultaneously load current and have reduced at short notice and cause that output voltage increases, and have accelerated the stable of stabilizer output voltage.
Claims (4)
1. low pressure difference linear voltage regulator, comprise feedback circuit (100) and the reference voltage unit (Vref) that is connected with error amplifier (EA) negative pole, has the first breakover element (MP) in feedback circuit (100), the control end of described the first breakover element (MP) is connected with the output terminal of error amplifier (EA), the input termination power (Vin) of the first breakover element (MP), output terminal connects the output terminal (Vout) of described voltage stabilizer, also be parallel with resistance branch and external capacitive branch between the output terminal (Vout) of voltage stabilizer and ground, the first resistance (R1) and the second resistance (R2) that series connection is arranged in resistance branch, go out from tap between the first resistance (R1) and the second resistance (R2) positive pole that feedback signal (Vfb) is connected to described error amplifier (EA), electric capacity (C) is arranged in capacitive branch, it is characterized by: the output terminal of voltage stabilizer (Vout) also is connected with the input end of the second breakover element (MN), the control end of the second breakover element (MN) is connected to the output terminal of error amplifier (EA), and the output terminal of the second breakover element (MN) is by the 3rd resistance (R3) ground connection.
2. low pressure difference linear voltage regulator as claimed in claim 1, it is characterized by: described the first breakover element (MP) and the second breakover element (MN) are field effect transistor.
3. low pressure difference linear voltage regulator as claimed in claim 2 is characterized by: described the first breakover element (MP) is P type field effect transistor, and the second breakover element (MN) is the N-type field effect transistor.
4. low pressure difference linear voltage regulator as described in one of claims 1 to 3, it is characterized by: described the 3rd resistance (R3) is variable resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310089540.7A CN103135648B (en) | 2013-03-20 | 2013-03-20 | Low dropout regulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310089540.7A CN103135648B (en) | 2013-03-20 | 2013-03-20 | Low dropout regulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103135648A true CN103135648A (en) | 2013-06-05 |
| CN103135648B CN103135648B (en) | 2015-01-21 |
Family
ID=48495616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310089540.7A Expired - Fee Related CN103135648B (en) | 2013-03-20 | 2013-03-20 | Low dropout regulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103135648B (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103970176A (en) * | 2014-05-26 | 2014-08-06 | 万高(杭州)科技有限公司 | Low-dropout linear voltage-stabilizing circuit and application system thereof |
| CN104079169A (en) * | 2014-06-24 | 2014-10-01 | 华为技术有限公司 | Circuit of switching inductance power supply |
| CN104079177A (en) * | 2014-06-24 | 2014-10-01 | 华为技术有限公司 | Circuit of voltage adjuster |
| CN104753344A (en) * | 2013-12-27 | 2015-07-01 | 展讯通信（上海）有限公司 | Technology for reducing BUCK static current |
| CN104793688A (en) * | 2015-04-22 | 2015-07-22 | 无锡中普微电子有限公司 | Voltage regulator |
| CN104954938A (en) * | 2015-06-03 | 2015-09-30 | 广东欧珀移动通信有限公司 | Power amplifier of earphone |
| CN105955390A (en) * | 2016-07-01 | 2016-09-21 | 唯捷创芯(天津)电子技术股份有限公司 | Low-dropout linear regulator module, chip and communication terminal |
| CN110347205A (en) * | 2018-04-03 | 2019-10-18 | 三美电机株式会社 | Power supply control semiconductor device and output voltage variable power supply device |
| CN110442179A (en) * | 2019-09-06 | 2019-11-12 | 深圳讯达微电子科技有限公司 | The low pressure difference linear voltage regulator and removing method of connection resistances influence can be eliminated |
| CN111679710A (en) * | 2020-07-08 | 2020-09-18 | 中国电子科技集团公司第二十四研究所 | Voltage difference detection circuit and low voltage difference linear voltage stabilizer |
| CN112527044A (en) * | 2020-12-02 | 2021-03-19 | 上海维安半导体有限公司 | Transient response enhancement circuit of no-capacitor LDO |
| CN112527041A (en) * | 2020-12-25 | 2021-03-19 | 北京集创北方科技股份有限公司 | Low dropout regulator circuit |
| CN113655837A (en) * | 2021-07-23 | 2021-11-16 | 成都华微电子科技有限公司 | Linear voltage stabilizer with fast transient response |
| CN114647271A (en) * | 2022-05-23 | 2022-06-21 | 芯海科技（深圳）股份有限公司 | LDO circuit, control method, chip and electronic equipment |
| CN115167600A (en) * | 2022-07-29 | 2022-10-11 | 西安微电子技术研究所 | Low dropout regulator circuit capable of resisting transient overshoot of output voltage |
| CN117277514A (en) * | 2023-11-17 | 2023-12-22 | 苏州贝克微电子股份有限公司 | Power supply circuit capable of reducing output voltage fluctuation |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101075143A (en) * | 2006-05-17 | 2007-11-21 | 深圳安凯微电子技术有限公司 | Low-voltage linear adjuster |
| US20080218137A1 (en) * | 2007-03-06 | 2008-09-11 | Fabio Hideki Okuyama | Technique for improving efficiency of a linear voltage regulator |
| CN101398694A (en) * | 2007-09-30 | 2009-04-01 | Nxp股份有限公司 | Non-capacitance low voltage difference constant voltage regulator with rapid excess voltage response |
| US20100213907A1 (en) * | 2009-02-25 | 2010-08-26 | Himax Analogic, Inc. | Low Drop Out Linear Regulator |
| KR20110003074A (en) * | 2009-07-03 | 2011-01-11 | 주식회사 하이닉스반도체 | Internal voltage generator for semiconductor device |
-
2013
- 2013-03-20 CN CN201310089540.7A patent/CN103135648B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101075143A (en) * | 2006-05-17 | 2007-11-21 | 深圳安凯微电子技术有限公司 | Low-voltage linear adjuster |
| US20080218137A1 (en) * | 2007-03-06 | 2008-09-11 | Fabio Hideki Okuyama | Technique for improving efficiency of a linear voltage regulator |
| CN101398694A (en) * | 2007-09-30 | 2009-04-01 | Nxp股份有限公司 | Non-capacitance low voltage difference constant voltage regulator with rapid excess voltage response |
| US20100213907A1 (en) * | 2009-02-25 | 2010-08-26 | Himax Analogic, Inc. | Low Drop Out Linear Regulator |
| KR20110003074A (en) * | 2009-07-03 | 2011-01-11 | 주식회사 하이닉스반도체 | Internal voltage generator for semiconductor device |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104753344A (en) * | 2013-12-27 | 2015-07-01 | 展讯通信（上海）有限公司 | Technology for reducing BUCK static current |
| CN103970176A (en) * | 2014-05-26 | 2014-08-06 | 万高(杭州)科技有限公司 | Low-dropout linear voltage-stabilizing circuit and application system thereof |
| CN104079169A (en) * | 2014-06-24 | 2014-10-01 | 华为技术有限公司 | Circuit of switching inductance power supply |
| CN104079177A (en) * | 2014-06-24 | 2014-10-01 | 华为技术有限公司 | Circuit of voltage adjuster |
| CN104079177B (en) * | 2014-06-24 | 2017-06-20 | 华为技术有限公司 | A kind of circuit of voltage adjuster |
| CN104793688A (en) * | 2015-04-22 | 2015-07-22 | 无锡中普微电子有限公司 | Voltage regulator |
| CN104954938A (en) * | 2015-06-03 | 2015-09-30 | 广东欧珀移动通信有限公司 | Power amplifier of earphone |
| WO2016192674A1 (en) * | 2015-06-03 | 2016-12-08 | 广东欧珀移动通信有限公司 | Earphone power amplifier |
| CN105955390A (en) * | 2016-07-01 | 2016-09-21 | 唯捷创芯(天津)电子技术股份有限公司 | Low-dropout linear regulator module, chip and communication terminal |
| CN110347205A (en) * | 2018-04-03 | 2019-10-18 | 三美电机株式会社 | Power supply control semiconductor device and output voltage variable power supply device |
| CN110442179A (en) * | 2019-09-06 | 2019-11-12 | 深圳讯达微电子科技有限公司 | The low pressure difference linear voltage regulator and removing method of connection resistances influence can be eliminated |
| CN110442179B (en) * | 2019-09-06 | 2024-04-30 | 深圳讯达微电子科技有限公司 | Low-dropout linear voltage regulator capable of eliminating influence of connecting line resistance and elimination method |
| CN111679710A (en) * | 2020-07-08 | 2020-09-18 | 中国电子科技集团公司第二十四研究所 | Voltage difference detection circuit and low voltage difference linear voltage stabilizer |
| CN111679710B (en) * | 2020-07-08 | 2022-01-21 | 中国电子科技集团公司第二十四研究所 | Voltage difference detection circuit and low voltage difference linear voltage stabilizer |
| CN112527044A (en) * | 2020-12-02 | 2021-03-19 | 上海维安半导体有限公司 | Transient response enhancement circuit of no-capacitor LDO |
| CN112527044B (en) * | 2020-12-02 | 2022-04-15 | 上海维安半导体有限公司 | Transient response enhancement circuit of no-capacitor LDO |
| CN112527041A (en) * | 2020-12-25 | 2021-03-19 | 北京集创北方科技股份有限公司 | Low dropout regulator circuit |
| CN113655837A (en) * | 2021-07-23 | 2021-11-16 | 成都华微电子科技有限公司 | Linear voltage stabilizer with fast transient response |
| CN114647271A (en) * | 2022-05-23 | 2022-06-21 | 芯海科技（深圳）股份有限公司 | LDO circuit, control method, chip and electronic equipment |
| CN115167600A (en) * | 2022-07-29 | 2022-10-11 | 西安微电子技术研究所 | Low dropout regulator circuit capable of resisting transient overshoot of output voltage |
| CN117277514A (en) * | 2023-11-17 | 2023-12-22 | 苏州贝克微电子股份有限公司 | Power supply circuit capable of reducing output voltage fluctuation |
| CN117277514B (en) * | 2023-11-17 | 2024-02-09 | 苏州贝克微电子股份有限公司 | Power supply circuit capable of reducing output voltage fluctuation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103135648B (en) | 2015-01-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103135648B (en) | Low dropout regulator | |
| CN105334900B (en) | Fast transient response low pressure difference linear voltage regulator | |
| US7683592B2 (en) | Low dropout voltage regulator with switching output current boost circuit | |
| CN106558987B (en) | Low quiescent current linear regulator circuit | |
| US7323853B2 (en) | Low drop-out voltage regulator with common-mode feedback | |
| US8810219B2 (en) | Voltage regulator with transient response | |
| CN103376816B (en) | Low-dropout voltage regulator | |
| US8471539B2 (en) | Low drop out voltage regulato | |
| CN106575865B (en) | The method of voltage regulator and the short-circuit protection in offer voltage regulator | |
| JP5014194B2 (en) | Voltage regulator | |
| KR102470562B1 (en) | Regulator with enhanced slew rate | |
| KR102277392B1 (en) | Buffer circuits and methods | |
| US7928708B2 (en) | Constant-voltage power circuit | |
| CN101419477A (en) | Controllable low voltage differential linear voltage stabilizing circuit for providing multi-output voltages | |
| TWI411903B (en) | Low drop out voltage regulator | |
| KR101238173B1 (en) | A Low Dropout Regulator with High Slew Rate Current and High Unity-Gain Bandwidth | |
| KR102225712B1 (en) | Voltage regulator | |
| CN108508953B (en) | Novel slew rate enhancement circuit and low dropout regulator | |
| CN102645945A (en) | Voltage regulator | |
| CN103412602A (en) | Non-capacitive low-dropout linear voltage regulator | |
| CN103472882A (en) | Low dropout regulator of integrated slew rate enhancement circuit | |
| CN102393778A (en) | Low-voltage-difference linear stabilized-voltage circuit and system | |
| JP6457887B2 (en) | Voltage regulator | |
| US9823678B1 (en) | Method and apparatus for low drop out voltage regulation | |
| CN110554728A (en) | Low dropout linear voltage stabilizing circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| 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: 20150121 Termination date: 20160320 |