CN106774617A - A kind of electric current can accurate corrective network - Google Patents
A kind of electric current can accurate corrective network Download PDFInfo
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- CN106774617A CN106774617A CN201611203981.5A CN201611203981A CN106774617A CN 106774617 A CN106774617 A CN 106774617A CN 201611203981 A CN201611203981 A CN 201611203981A CN 106774617 A CN106774617 A CN 106774617A
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- current
- source electrode
- electric current
- pmos
- corrective network
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F3/00—Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties
- G05F3/02—Regulating voltage or current
- G05F3/08—Regulating voltage or current wherein the variable is dc
- G05F3/10—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics
- G05F3/16—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices
- G05F3/20—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices using diode- transistor combinations
- G05F3/26—Current mirrors
- G05F3/262—Current mirrors using field-effect transistors only
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Amplifiers (AREA)
- Control Of Electrical Variables (AREA)
Abstract
The invention discloses a kind of electric current can accurate corrective network, the electric current precisely can constitute current source circuit by corrective network together with reference current generating circuit, current mirror.Current source circuit first passes through electric current production circuit and obtains electric current, then exported to size of current corrective network by current mirror, high-precision electric current precisely can be exported after corrective network, current mirror just can finally be needed to use the module of reference current to each by size of current.Electric current of the present invention can accurate corrective network, be capable of achieving the regulation of reference current scope, current precision can adjust, while have realizing the characteristics of area is small, and integrated level is high.
Description
Technical field
The invention belongs to IC design field, specificallying relate to a kind of electric current can accurate corrective network.
Background technology
In Analogous Integrated Electronic Circuits, current source is one of most basic module, its size of current be subject to technique, temperature etc. because
The influence of element, the present invention provide a kind of electric current can accurate corrective network energy accurate adjustment size of current, while have integrated level it is high,
Realize the small advantage of area.
The content of the invention
In view of the regulation to reference current size, and realize that size of current can be corrected precisely, the invention provides a kind of electricity
Stream can accurate corrective network circuit structure.
Above-mentioned purpose of the invention, will be achieved by the following technical programs：
A kind of electric current precisely can first pass through electric current production circuit acquisition electric current by corrective network, then be exported to electricity by current mirror
Stream size corrective network, precisely high-precision electric current can be exported after corrective network through overcurrent, just can finally be arrived current mirror
Each needs to use the module of reference current.
Further, PMOS M31, M32 of the current correction network, the grid of M33 ... M3n, M3 (n+1) connect
Ground, M31 drain electrodes are connected with the source electrode of M32, M32 drain electrodes are connected with the source electrode of M33 ... the source electrode and electric current of initial M31
The drain electrode of PMOS M21 is connected in 1, the grounded drain of last PMOS M3 (n+1).
Further, PMOS M311, M312 described in current correction network, M321, M322, M331, M332 ... M3n1,
The grounded-grid of M3n2, the source electrode of M311 is connected with the source electrode of M31, and the drain electrode of M311 is connected with the source electrode of M312, the leakage of M312
Pole is connected with either-or switch S31 moved ends, and the source electrode of M321 is connected with the source electrode of M32, M321 drain electrode and M322 source electrode phase
Even, the drain electrode of M322 is connected with either-or switch S32 moved ends ..., and the source electrode of M3n1 is connected with the source electrode of M3n, the drain electrode of M3n1
It is connected with the source electrode of M3n2, the drain electrode of M3n2 is connected with either-or switch S3n moved ends.
Further, described in current correction network PMOS M31, M311, M312, M32, M321, M322, M33,
The size of M331, M332 ... M3n, 3n1, M3n2 is identical.
Further, two fixing ends one of two choosing switch S31, S31 ... S3n described in current correction network connect
Ground, another fixing end is connected with NMOS tube M30 poles and grid, NMOS tube M30 poles ground connection.
The technical scheme beneficial effect of offer of the invention is：A kind of electric current provided by the present invention can precisely correct net
Network, by the size of current corrective network using metal-oxide-semiconductor structure, energy is simple, convenient, accurately realize size of current 1/2nEssence
Degree correction.The adjustable range of reference current size can reach 1/2 simultaneouslyn~ 2 times, in addition the present invention efficiently reduce LDO cores
Piece area, makes chip integration higher, also reduces cost.
Hereinafter just accompanying drawing in conjunction with the embodiments, the specific embodiment of the technical scheme provided the present invention is made further
It is bright, so that the present invention is easier to understand, implements.
Brief description of the drawings
A kind of electric currents of Fig. 1 can accurate corrective network；
A kind of electric currents of Fig. 2 precisely can implement illustration by corrective network.
Specific embodiment
Specific embodiment will be illustrated further to spirit of the invention, herein illustrative examples of the invention and
Illustrate for explaining the present invention, but be not construed as limitation of the invention.
A kind of electric current can accurate corrective network, electric current is produced by reference current generating circuit, through current mirror, size of current school
Positive network produces accurate correcting current.
The reference current generating circuit as shown in Figure 2 includes operational amplifier OP, PMOS M11, resistance R11；It is described
The anti-phase of operational amplifier OP is transported into termination reference voltage, and the output of the operational amplifier connects the grid of PMOS M11, PMOS
The source electrode of pipe M11 is connected to power supply, and the drain electrode of PMOS M11 is connected to the Single port of resistance R11, and same with operational amplifier
Phase input is connected together, the another port ground connection of resistance R11.
Described current mirror 1, it is characterised in that the grid of PMOS M21 and the output end of error amplifier, PMOS M21
Grid connection, the source electrode of PMOS M21 connects with power supply, the drain electrode of PMOS M21 and current correction network connection.
PMOS M31, M32 of the current correction network, the grounded-grid of M33 ... M3n, M3 (n+1), M31 drain electrodes
It is connected with the source electrode of M32, M32 drain electrodes are connected with the source electrode of M33 ... the source electrode of the M31 of starting and PMOS in electric current 1
The drain electrode of M21 is connected, the grounded drain of last PMOS M3 (n+1).
PMOS M311, M312 of the current correction network, M321, M322, M331, M332 ... M3n1, M3n2
Grounded-grid, the source electrode of M311 is connected with the source electrode of M31, and the drain electrode of M311 is connected with the source electrode of M312, the drain electrode of M312 and two
A switch S31 moved ends are selected to connect, the source electrode of M321 is connected with the source electrode of M32, and the drain electrode of M321 is connected with the source electrode of M322, M322
Drain electrode be connected with either-or switch S32 moved ends ... the source electrode of M3n1 is connected with the source electrode of M3n, and the drain electrode of M3n1 is with M3n2
Source electrode is connected, and the drain electrode of M3n2 is connected with either-or switch S3n moved ends.
PMOS M31, M311, M312, M32, M321, M322, M33, M331, M332 ... of the current correction network
The size of M3n, 3n1, M3n2 is identical.
Two fixing ends, one ground connection of two choosing switch S31, S31 ... S3n of the current correction network, another is consolidated
Fixed end is connected with NMOS tube M30 poles and grid, NMOS tube M30 poles ground connection.
The grid of NMOS tube M41, M42 ... the M4k of the current mirror 2 is connected with NMOS tube M3 grids, NMOS tube M41,
The source ground of M42 ... M4k, the drain electrode of NMOS tube M41, M42 ... M4k provides current to each mould for needing to use electric current
Block.
The electric current of present invention design precisely can first pass through electric current production circuit acquisition electric current by corrective network, then by electric current
To size of current corrective network, the size of current that switch S3n is flowed through in size of current corrective network is 1/2 for mirror image outputn, electricity
Stream is by switch or flow direction ground, or flows to current mirror, and electric current 1/2 can be simply and easily realized by the control for switchingn
Precision regulation, current mirror just can finally be needed to use the module of reference current to each.By this hair in this paper institute's years
Bright description and embodiments, those skilled in the art can will readily appreciate that other aspects and embodiment.
For those skilled in the art, under the premise without departing from the principles of the invention, can also make
Go out various specific deformations and combination, these deformations and combination also should be regarded as protection scope of the present invention.
Claims (4)
1. current correction network according to claim 1, it is characterised in that PMOS M31, M32, M33 ... M3n,
The grounded-grid of M3 (n+1), M31 drain electrodes are connected with the source electrode of M32, and it is initial that M32 drain electrodes are connected with the source electrode of M33 ...
The source electrode of M31 is connected with the drain electrode of PMOS M21 in electric current 1, the grounded drain of last PMOS M3 (n+1).
2. current correction network according to claim 1, it is characterised in that PMOS M311, M312, M321,
The grounded-grid of M322, M331, M332 ... M3n1, M3n2, the source electrode of M311 is connected with the source electrode of M31, the drain electrode of M311 with
The source electrode of M312 is connected, and the drain electrode of M312 is connected with either-or switch S31 moved ends, and the source electrode of M321 is connected with the source electrode of M32,
The drain electrode of M321 is connected with the source electrode of M322, the drain electrode of M322 is connected with either-or switch S32 moved ends ... the source electrode of M3n1 with
The source electrode of M3n is connected, and the drain electrode of M3n1 is connected with the source electrode of M3n2, and the drain electrode of M3n2 is connected with either-or switch S3n moved ends.
3. PMOS M31, M311 according to claim 1, claim 2, M312, M32, M321, M322, M33,
The size of M331, M332 ... M3n, 3n1, M3n2 is identical.
4. current correction network according to claim 1, it is characterised in that two of two choosing switch S31, S31 ... S3n
One ground connection of fixing end, another fixing end is connected with NMOS tube M30 poles and grid, NMOS tube M30 poles ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611203981.5A CN106774617B (en) | 2016-12-23 | 2016-12-23 | A kind of electric current can accurate corrective network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611203981.5A CN106774617B (en) | 2016-12-23 | 2016-12-23 | A kind of electric current can accurate corrective network |
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| Publication Number | Publication Date |
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| CN106774617A true CN106774617A (en) | 2017-05-31 |
| CN106774617B CN106774617B (en) | 2019-07-19 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040140853A1 (en) * | 2001-05-25 | 2004-07-22 | Infineon Technologies North America Corp. | Gm replica cell utilizing an error amplifier connected to a current mirror |
| CN1595808A (en) * | 2003-09-09 | 2005-03-16 | 三星电子株式会社 | Digital-to-analog converter circuits including independently sized reference current source transistors and methods of operating same |
| US20090167579A1 (en) * | 2007-12-28 | 2009-07-02 | Nec Electronics Corporation | D/a conversion circuit |
| CN101625575A (en) * | 2009-07-24 | 2010-01-13 | 中国科学院微电子研究所 | Complementary CMOS reference voltage source |
| US20150022259A1 (en) * | 2013-07-17 | 2015-01-22 | Media Tek Singapore Pte. Ltd. | Calibration method and apparatus for current and resistance |
| CN105468071A (en) * | 2014-09-04 | 2016-04-06 | 中芯国际集成电路制造(上海)有限公司 | Band gap voltage reference source circuit and integrated circuit |
-
2016
- 2016-12-23 CN CN201611203981.5A patent/CN106774617B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040140853A1 (en) * | 2001-05-25 | 2004-07-22 | Infineon Technologies North America Corp. | Gm replica cell utilizing an error amplifier connected to a current mirror |
| CN1595808A (en) * | 2003-09-09 | 2005-03-16 | 三星电子株式会社 | Digital-to-analog converter circuits including independently sized reference current source transistors and methods of operating same |
| US20090167579A1 (en) * | 2007-12-28 | 2009-07-02 | Nec Electronics Corporation | D/a conversion circuit |
| CN101625575A (en) * | 2009-07-24 | 2010-01-13 | 中国科学院微电子研究所 | Complementary CMOS reference voltage source |
| US20150022259A1 (en) * | 2013-07-17 | 2015-01-22 | Media Tek Singapore Pte. Ltd. | Calibration method and apparatus for current and resistance |
| CN105468071A (en) * | 2014-09-04 | 2016-04-06 | 中芯国际集成电路制造(上海)有限公司 | Band gap voltage reference source circuit and integrated circuit |
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| Publication number | Publication date |
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| CN106774617B (en) | 2019-07-19 |
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