CN103135655B - Starting circuit of band gap basic standard source - Google Patents
Starting circuit of band gap basic standard source Download PDFInfo
- Publication number
- CN103135655B CN103135655B CN201110391320.0A CN201110391320A CN103135655B CN 103135655 B CN103135655 B CN 103135655B CN 201110391320 A CN201110391320 A CN 201110391320A CN 103135655 B CN103135655 B CN 103135655B
- Authority
- CN
- China
- Prior art keywords
- node
- current mirror
- band gap
- source
- resistor
- 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.)
- Active
Links
Landscapes
- Amplifiers (AREA)
- Control Of Electrical Variables (AREA)
Abstract
The invention discloses a starting circuit of a band gap basic standard source. The starting circuit of the band gap basic standard source comprises a current mirror MP1, a current mirror MP2 and a current mirror MP3, grid electrodes of the current mirror MP1, the current mirror MP2 and the current mirror MP3 are of output of an operational amplifier A1, and source electrodes of the current mirror MP1, the current mirror MP2 and the current mirror MP3 are connected with a power source. A drain electrode node A of the current mirror MP1is connected with a resistor R1, an emitting electrode of an audion Q1 and input of the operational amplifier A1, and a drain electrode node B of MP0 is connected with a resistor R0, a resistor R2 and the input of the operational amplifier A1. A node C of the other end of the resistor R0 is connected with an emitting electrode of an audion Q0, a drain electrode of the current mirror MP2 is connected with a resistor R3 and connected with input voltage vref, and the other ends of the resistor R1, the resistor R2 and the resistor R3 and base electrodes and collector electrodes of the audion Q0 and the audionQ1 are connected with the ground. Drain electrodes of a transistor MN1 and a transistor MN2 are connected with the power source, grid electrodes of the transistor MN1 and the transistor MN2 are respectively connected with the node B and the node C, and a source electrode of the transistor MN1 is connected with a resistor R4. A node D of the other end of the resistor R4 is connected with a current source I1 and a corrugated metal pipe (CMP) input of a comparator, and a node E of a source electrode of the transistor MN2 is connected with the input and a current source I2 of the comparator. The starting circuit of the band gap basic standard source can improve precision of the band gap basic standard source.
Description
Technical field
The present invention relates to a kind of start-up circuit of band gap reference of high precision low-voltage.
Background technology
Reference current source occupies very important status in simulation and mixed-signal system, and at A/D converter, D/A converter and a lot of mimic channel are as played vital effect in the circuit such as operational amplifier, wave filter.
At present, as shown in Figure 2, due to needs low pressure band gap reference, therefore need to be incorporated to two identical resistance R 1, R2 at amplifier input end, because actual amplifier input end has OFFSET, therefore this structure has been brought extra steady state (SS),, except the state that normal condition and PMOS current mirror turn-off completely, also has the 3rd state.Under this state, triode has receives the electric current of peace level.In order to avoid the 3rd steady state (SS), in full condition of work and process corner situation, while normally work, the circuit in start-up circuit often can not be closed completely, have tens and receive and pacify hundreds of even and receive the electric current of peace magnitude and flow into the loop of band gap reference, reduced the precision of band gap reference.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of start-up circuit of band gap reference, and it can improve the precision of band gap reference.
In order to solve above technical matters, the invention provides a kind of start-up circuit of band gap reference; Comprise: current mirror MP1, MP2 and MP3, the grid of current mirror MP1, MP2 and MP3 is all the output of amplifier A1, its source electrode all connects power supply, drain node A connecting resistance R1, the emitter of triode Q1 and the input of amplifier A1 of current mirror MP1; The input of drain node B connecting resistance R0, resistance R 2 and the amplifier A1 of MP0, the other end node C of resistance R 0 connects the emitter of triode Q0, and the drain electrode connecting resistance R3 of current mirror MP2 also connects input voltage vref; The other end of resistance R 1, R2, R3 and triode Q0, the base stage of Q1, the equal ground connection of collector; The drain electrode of transistor MN1 and MN2 connects power supply, grid meets respectively Node B and node C, the source electrode connecting resistance R4 of transistor MN1, resistance R 4 other end node D connect current source I1 and comparator C MP input, and the source node E of transistor MN2 connects comparer input and current source I2.
Beneficial effect of the present invention is: the precision that can improve band gap reference.
In band gap reference, the voltage at resistance R 0 two ends of connecting with triode Q0 is detected, and control start-up circuit by this testing result and open or close.
Brief description of the drawings
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is the schematic diagram of the start-up circuit of band gap reference of the present invention;
Fig. 2 is the schematic diagram of the start-up circuit of common band gap reference.
Embodiment
As shown in Figure 1, this is a kind of start-up circuit of band gap reference of high precision low-voltage.MP1, MP2 and MP3 are current mirror, its grid is all the output of amplifier A1, its source electrode all connects power supply, the drain node A connecting resistance R1 of MP1, the input of the emitter of triode Q1 and amplifier A1, the drain node B connecting resistance R0 of MP0, the input of resistance R 2 and amplifier A1, the other end node C of resistance R 0 connects the emitter of triode Q0, and the drain electrode connecting resistance R3 of MP2 also inputs vref, resistance R 1, R2, the base stage of the other end of R3 and triode Q0, Q1, the equal ground connection of collector.The drain electrode of MN1 and MN2 connects power supply, grid meets respectively Node B and node C, the source electrode connecting resistance R4 of MN1, resistance R 4 other end node D connect current source I1 and comparator C MP input, the source node E of MN2 connects comparer input and current source I2, comparer output control band gap reference start-up circuit startup.
As shown in Figure 1, in three steady state (SS)s of band gap reference, only has normal operating conditions, MP0 has the circuit of microampere order and in resistance R 0, produces the voltage of 60mV～120mV, under other two steady state (SS)s, whether the pressure drop producing in resistance R 0 is not more than 2mV, as long as therefore can distinguish the pressure drop size in resistance R 0, just can control start-up circuit and open or close completely.By with a comparer with hysteresis, circuit that just can be such.Node B, C pass through respectively source follower output node F, E, and wherein node F voltage deducts a fixed voltage again and obtains node D, and node D and node E are relatively exported to control whether opening of start-up circuit by comparator C MP.In the time of normal work, the electric current that does not have extra start-up circuit flows into band gap reference loop like this.
The present invention is not limited to embodiment discussed above.Above the description of embodiment is intended in order to describe and illustrate the technical scheme the present invention relates to.Apparent conversion based on the present invention enlightenment or substitute and also should be considered to fall into protection scope of the present invention.Above embodiment is used for disclosing best implementation method of the present invention, to make those of ordinary skill in the art can apply numerous embodiments of the present invention and multiple alternative reaches object of the present invention.
Claims (2)
1. the start-up circuit of a band gap reference; It is characterized in that, comprising:
Current mirror MP1, MP2 and MP3, the grid of current mirror MP1, MP2 and MP3 is all the output of amplifier A1, its source electrode all connects power supply, drain node A connecting resistance R1, the emitter of triode Q1 and the input of amplifier A1 of current mirror MP1;
The input of drain node B connecting resistance R0, resistance R 2 and the amplifier A1 of MP0, the other end node C of resistance R 0 connects the emitter of triode Q0, and the drain electrode connecting resistance R3 of current mirror MP2 also connects input voltage vref;
The other end of resistance R 1, R2, R3 and triode Q0, the base stage of Q1, the equal ground connection of collector;
The drain electrode of transistor MN1 and MN2 connects power supply, grid meets respectively Node B and node C, the source electrode connecting resistance R4 of transistor MN1, resistance R 4 other end node D connect current source I1 and comparator C MP input, the source node E of transistor MN2 connects comparer input and current source I2, and comparator output terminal connects the start end of band gap reference.
2. the start-up circuit of band gap reference as claimed in claim 1; It is characterized in that, in band gap reference, the voltage at resistance R 0 two ends of connecting with triode Q0 is detected, and control start-up circuit by this testing result and open or close.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110391320.0A CN103135655B (en) | 2011-11-30 | 2011-11-30 | Starting circuit of band gap basic standard source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110391320.0A CN103135655B (en) | 2011-11-30 | 2011-11-30 | Starting circuit of band gap basic standard source |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103135655A CN103135655A (en) | 2013-06-05 |
| CN103135655B true CN103135655B (en) | 2014-12-10 |
Family
ID=48495621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110391320.0A Active CN103135655B (en) | 2011-11-30 | 2011-11-30 | Starting circuit of band gap basic standard source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103135655B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104132702B (en) * | 2014-08-11 | 2017-10-13 | 东南大学 | A kind of Acceleration of starting circuit of bandgap voltage reference |
| CN104714594B (en) * | 2015-03-27 | 2016-03-23 | 西安紫光国芯半导体有限公司 | A kind of start-up circuit of band-gap reference |
| CN106168826B (en) * | 2016-09-23 | 2017-06-06 | 厦门新页微电子技术有限公司 | A kind of gap tunable reference voltage circuit for being applied to wireless charging control chip |
| CN107943182B (en) * | 2017-11-30 | 2019-10-11 | 上海华虹宏力半导体制造有限公司 | Band gap reference start-up circuit |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2239645A1 (en) * | 2009-04-09 | 2010-10-13 | austriamicrosystems AG | Band gap reference circuit and method for operating a band gap reference circuit |
| CN102103388A (en) * | 2009-12-22 | 2011-06-22 | 三星半导体(中国)研究开发有限公司 | Bandgap voltage reference circuit with start-up circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2442494A (en) * | 2006-10-06 | 2008-04-09 | Wolfson Microelectronics Plc | Voltage reference start-up circuit |
-
2011
- 2011-11-30 CN CN201110391320.0A patent/CN103135655B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2239645A1 (en) * | 2009-04-09 | 2010-10-13 | austriamicrosystems AG | Band gap reference circuit and method for operating a band gap reference circuit |
| CN102103388A (en) * | 2009-12-22 | 2011-06-22 | 三星半导体(中国)研究开发有限公司 | Bandgap voltage reference circuit with start-up circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103135655A (en) | 2013-06-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107209528B (en) | Band gap voltage generates | |
| CN101470457A (en) | Bandgap refernce voltage generating circuit | |
| CN105320199B (en) | A kind of reference voltage source with high-order compensation | |
| CN104750150A (en) | Voltage regulator and electronic apparatus | |
| CN103135655B (en) | Starting circuit of band gap basic standard source | |
| CN112769093B (en) | Current-limiting control circuit, chip and power supply | |
| CN103809648B (en) | The start-up circuit of band gap reference | |
| CN107102680A (en) | A kind of low noise low pressure difference linear voltage regulator | |
| CN109101067A (en) | A kind of low pressure difference linear voltage regulator of dual power rail | |
| CN106020317B (en) | A kind of current foldback circuit of low pressure difference linear voltage regulator | |
| CN104635823B (en) | Low-dropout linear voltage-regulating circuit | |
| CN104331112A (en) | Low dropout linear regulator and soft starting circuit thereof | |
| CN205540381U (en) | Accurate excess temperature protection circuit of current feedback formula | |
| CN106055011B (en) | A kind of self-starting power supply circuit | |
| CN209709677U (en) | A kind of protection circuit of high efficiency current detecting and current-limiting function | |
| CN105807831A (en) | Linear voltage regulator and linear voltage stabilizing system preventing overshoot | |
| CN202817742U (en) | Overcurrent protection circuit | |
| CN102023668B (en) | Linear voltage adjuster circuit | |
| CN203084588U (en) | Voltage stabilizer | |
| CN208888682U (en) | Low-dropout linear voltage-regulating circuit, electronic equipment | |
| CN107368139B (en) | Low-noise L DO of integrated chip circuit | |
| CN208188715U (en) | The LDO circuit of high PSRR quick response | |
| CN109787207A (en) | A protection circuit with high-efficiency current detection and current-limiting functions | |
| CN110320953A (en) | A kind of adjustable reference voltage source of output voltage | |
| CN104977972B (en) | Low pressure and low power-consumption band-gap reference 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 | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI HUAHONG GRACE SEMICONDUCTOR MANUFACTURING Free format text: FORMER OWNER: HUAHONG NEC ELECTRONICS CO LTD, SHANGHAI Effective date: 20140116 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 201206 PUDONG NEW AREA, SHANGHAI TO: 201203 PUDONG NEW AREA, SHANGHAI |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20140116 Address after: 201203 Shanghai city Zuchongzhi road Pudong New Area Zhangjiang hi tech Park No. 1399 Applicant after: Shanghai Huahong Grace Semiconductor Manufacturing Corporation Address before: 201206, Shanghai, Pudong New Area, Sichuan Road, No. 1188 Bridge Applicant before: Shanghai Huahong NEC Electronics Co., Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |