CN102571002A - Automatic-biasing structural operation amplifier applied to band gap reference source - Google Patents
Automatic-biasing structural operation amplifier applied to band gap reference source Download PDFInfo
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- CN102571002A CN102571002A CN2010105825604A CN201010582560A CN102571002A CN 102571002 A CN102571002 A CN 102571002A CN 2010105825604 A CN2010105825604 A CN 2010105825604A CN 201010582560 A CN201010582560 A CN 201010582560A CN 102571002 A CN102571002 A CN 102571002A
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Abstract
The invention discloses an automatic-biasing structural operation amplifier applied to a band gap reference source, which comprises an input stage, an output stage, a biasing circuit and a starting circuit of the biasing circuit, wherein the biasing circuit produces direct-current biasing voltage of the operation amplifier. Feedback is formed between the output stage and the input stage of the operation amplifier through a band gap reference source core circuit, the biasing voltage of the operation amplifier is controlled by signals of an output end of the operation amplifier, and the biasing voltage generating circuit of the operation amplifier and the band gap reference source core circuit share the same starting circuit. The automatic-biasing structural operation amplifier is favorable for reducing the area and power consumption of a chip and improving operation reliability.
Description
Technical field
The present invention relates to a kind of electronic system, automatic biasing structure arithmetic amplifier on particularly a kind of chip.
Background technology
Operational amplifier has become in the analog integrated circuit that purposes is the widest, one of most important parts.Its main function is for analog signal provides enough gains, utilizes the various feedback circuit that adds, and operational amplifier can be realized the multiple processing capacity to analog signal, for example amplification, differential, integration, summation, logarithm operation etc.
The biasing of operational amplifier is extremely important, is the basic condition of operational amplifier work, is the key factor that can the decision operational amplifier operate as normal.The band-gap reference source circuit is used for producing reference voltage or electric current more accurately, is common in various A/D, and D/A is during telecommunication circuit, data acquisition system and accurate sensing etc. are used.Its inside generally needs operation amplifier circuit and band gap reference core circuit to connect into feedback form to guarantee high-precision requirement.
The bias voltage of present most operation amplifier circuits is produced by independent biasing circuit.Wrong stable state in the biasing circuit, biasing circuit needs a start-up circuit, makes biasing circuit get into correct stable state.In band gap reference, in order to improve its toggle speed, the band gap reference core circuit also often needs a startup accelerating circuit.Yet more start-up circuit except meeting brings the bigger expense of area and power consumption, also can bring since more stable state with start precedence and cause circuit working to wait integrity problem unusually.This has improved the complexity and the difficulty that design, has also reduced the reliability of circuit working.
Summary of the invention
Technical problem to be solved by this invention provides a kind of, and it can reduce band gap reference module dissipation and area overhead, and improves the module functional reliability.
In order to solve above technical problem, the invention provides a kind of automatic biasing structure arithmetic amplifier that is applied to band gap reference, it comprises: the input stage of operational amplifier; The output stage of operational amplifier; Produce the biasing circuit of operational amplifier dc offset voltage; The start-up circuit of biasing circuit; The output stage of said operational amplifier constitutes feedback through the input stage of band gap reference core circuit and operational amplifier; The bias voltage of said operational amplifier receives the control of the output end signal of operational amplifier own, the shared start-up circuit of the bias-voltage generating circuit of said operational amplifier and band gap reference core circuit.
Beneficial effect of the present invention is: reduced the power consumption and the area consumption of independent biasing circuit, helped improving functional reliability.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is done further explain.
Fig. 1 is the described internal circuit that is applied to the automatic biasing structure arithmetic amplifier of band gap reference of the embodiment of the invention;
Fig. 2 is applied to the automatic biasing structure arithmetic amplifier of band gap reference and the connection layout of band gap reference core circuit and start-up circuit.
Embodiment
The present invention provides a kind of automatic biasing structure arithmetic amplifier that is applied to band gap reference.Can reduce band gap reference module dissipation and area overhead, and improve the module functional reliability.According to the present invention, a kind of automatic biasing structure arithmetic amplifier that is applied to band gap reference is provided.Wherein the input and output side of automatic biasing structure arithmetic amplifier and band gap reference core circuit connect into feedback form.The direct voltage of operational amplifier output terminal can be used as the bias voltage of operational amplifier self, also can utilize image current to flow through the heavy bias voltage that produces of electric current.With the bias voltage of this generation bias voltage as operational amplifier.The bias voltage of operational amplifier is produced by the output control of operational amplifier oneself, rather than by independently biasing circuit generation in addition, this bias mode of operational amplifier is called automatic biasing.The shared start-up circuit of the bias voltage of operational amplifier and band gap reference core circuit.
The automatic biasing structure arithmetic amplifier that is applied to band gap reference is compared the operational amplifier of traditional structure, has reduced the power consumption and the area consumption of independent biasing circuit.The shared start-up circuit of the bias-voltage generating circuit of operational amplifier and band gap reference core circuit can reduce multistable that startup respectively possibly bring and the risk that successively starts.The automatic biasing structure arithmetic amplifier of realizing according to the present invention that is applied to band gap reference; Constitute feedback with the band gap reference core circuit; Produce the bias voltage that operational amplifier needs; And with the shared start-up circuit of band gap reference core circuit, help reducing chip area and power consumption, help improving functional reliability.
As shown in Figure 1, be an automatic biasing structure arithmetic amplifier internal circuit schematic diagram that is applied to band gap reference of implementing according to the present invention.This operational amplifier can adopt other multiple structures, for example two-stage calculation amplifier, cascodes operational amplifier etc. according to application demand when actual design.Fig. 2 is applied to the automatic biasing structure arithmetic amplifier of band gap reference and the connection layout of band gap reference core circuit and start-up circuit.Wherein the input and output side of automatic biasing structure arithmetic amplifier and band gap reference core circuit connect into feedback form.The bias voltage vbias of operational amplifier is produced by the output control of operational amplifier oneself among the present invention, rather than by independently biasing circuit generation in addition, this bias mode of operational amplifier is called automatic biasing.The automatic biasing structure is compared other biasing circuit and has been saved chip area and power consumption.The shared start-up circuit of the bias voltage of operational amplifier and band gap reference core circuit.
Start-up circuit is managed M4, M5 and resistance R 4 by NMOS and is constituted, and assurance band gap reference core circuit and operational amplifier can be set up correct working point fast, can not be operated under the wrong stable state.Compare with the structure of general employing two cover start-up circuits, a shared start-up circuit can reduce because many start-up circuits do not match, and successively starts to wait the risk that causes, and improves the circuit working reliability.
The present invention is not limited to the execution mode that preceding text are discussed.More than the description of embodiment is intended in order to describe and explain the technical scheme that the present invention relates to.Based on the conspicuous conversion of 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, so that those of ordinary skill in the art can use numerous embodiments of the present invention and multiple alternative reaches the object of the invention.
Claims (2)
1. be applied to the automatic biasing structure arithmetic amplifier of band gap reference, it is characterized in that, comprising:
The input stage of operational amplifier;
The output stage of operational amplifier;
Produce the biasing circuit of operational amplifier dc offset voltage;
The start-up circuit of biasing circuit;
The output stage of said operational amplifier constitutes feedback through the input stage of band gap reference core circuit and operational amplifier; The bias voltage of said operational amplifier receives the control of the output end signal of operational amplifier own, the shared start-up circuit of the bias-voltage generating circuit of said operational amplifier and band gap reference core circuit.
2. the automatic biasing structure arithmetic amplifier that is applied to band gap reference as claimed in claim 1 is characterized in that, the input stage of said operational amplifier adopts the both-end differential input stage or adopts single-ended input stage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105825604A CN102571002A (en) | 2010-12-10 | 2010-12-10 | Automatic-biasing structural operation amplifier applied to band gap reference source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105825604A CN102571002A (en) | 2010-12-10 | 2010-12-10 | Automatic-biasing structural operation amplifier applied to band gap reference source |
Publications (1)
| Publication Number | Publication Date |
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| CN102571002A true CN102571002A (en) | 2012-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010105825604A Pending CN102571002A (en) | 2010-12-10 | 2010-12-10 | Automatic-biasing structural operation amplifier applied to band gap reference source |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103560665A (en) * | 2013-11-08 | 2014-02-05 | 深圳创维－Rgb电子有限公司 | DC-DC conversion circuit and DC-DC chip |
| CN105071780A (en) * | 2015-08-25 | 2015-11-18 | 上海集成电路研发中心有限公司 | Broadband low noise amplifier with output to input feedback |
| CN105116954A (en) * | 2015-09-07 | 2015-12-02 | 卓捷创芯科技（深圳）有限公司 | Automatic biasing band-gap reference circuit with wide input voltage range and high-precision output |
| CN108809259A (en) * | 2017-05-05 | 2018-11-13 | 中芯国际集成电路制造(上海)有限公司 | Power amplifier circuit and forming method thereof |
| CN109101069A (en) * | 2018-10-26 | 2018-12-28 | 上海海栎创微电子有限公司 | A kind of voltage buffer circuit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060279270A1 (en) * | 2005-06-10 | 2006-12-14 | An-Chung Chen | Bandgap reference circuit |
| CN101131592A (en) * | 2007-09-20 | 2008-02-27 | 华中科技大学 | Band-gap reference source with high power supply restraint |
| CN101592971A (en) * | 2008-05-28 | 2009-12-02 | 北京中电华大电子设计有限责任公司 | A kind of self-adapting starting circuit that is used for reference source |
| CN102109871A (en) * | 2009-12-24 | 2011-06-29 | 上海华虹集成电路有限责任公司 | Band gap reference source |
-
2010
- 2010-12-10 CN CN2010105825604A patent/CN102571002A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060279270A1 (en) * | 2005-06-10 | 2006-12-14 | An-Chung Chen | Bandgap reference circuit |
| CN101131592A (en) * | 2007-09-20 | 2008-02-27 | 华中科技大学 | Band-gap reference source with high power supply restraint |
| CN101592971A (en) * | 2008-05-28 | 2009-12-02 | 北京中电华大电子设计有限责任公司 | A kind of self-adapting starting circuit that is used for reference source |
| CN102109871A (en) * | 2009-12-24 | 2011-06-29 | 上海华虹集成电路有限责任公司 | Band gap reference source |
Non-Patent Citations (3)
| Title |
|---|
| 张红丽等: "一种高精度CMOS带隙基准电路的设计", 《微纳电子技术》 * |
| 张超等: "一种自偏置电流CMOS基准源的分析与设计", 《电子科技》 * |
| 瞿美霞: "CMOS带隙基准源的研究与实现", 《中国优秀硕士学位论文全文数据库信息科技辑》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103560665A (en) * | 2013-11-08 | 2014-02-05 | 深圳创维－Rgb电子有限公司 | DC-DC conversion circuit and DC-DC chip |
| CN105071780A (en) * | 2015-08-25 | 2015-11-18 | 上海集成电路研发中心有限公司 | Broadband low noise amplifier with output to input feedback |
| CN105071780B (en) * | 2015-08-25 | 2018-10-16 | 上海集成电路研发中心有限公司 | With the wideband low noise amplifier for being output to input feedback |
| CN105116954A (en) * | 2015-09-07 | 2015-12-02 | 卓捷创芯科技（深圳）有限公司 | Automatic biasing band-gap reference circuit with wide input voltage range and high-precision output |
| WO2017041691A1 (en) * | 2015-09-07 | 2017-03-16 | 卓捷创芯科技（深圳）有限公司 | Self-biased bandgap reference circuit with wide range of input voltages and high-precision output |
| CN108809259A (en) * | 2017-05-05 | 2018-11-13 | 中芯国际集成电路制造(上海)有限公司 | Power amplifier circuit and forming method thereof |
| CN108809259B (en) * | 2017-05-05 | 2022-03-11 | 中芯国际集成电路制造(上海)有限公司 | Power amplifier circuit and method of forming the same |
| CN109101069A (en) * | 2018-10-26 | 2018-12-28 | 上海海栎创微电子有限公司 | A kind of voltage buffer circuit |
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Application publication date: 20120711 |