CN109508063A - A kind of error amplifier with feedforward compensation network - Google Patents
A kind of error amplifier with feedforward compensation network Download PDFInfo
- Publication number
- CN109508063A CN109508063A CN201811624526.1A CN201811624526A CN109508063A CN 109508063 A CN109508063 A CN 109508063A CN 201811624526 A CN201811624526 A CN 201811624526A CN 109508063 A CN109508063 A CN 109508063A
- Authority
- CN
- China
- Prior art keywords
- grid
- drain electrode
- feedforward
- gain module
- compensation
- 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
- 239000003990 capacitor Substances 0.000 claims abstract description 7
- 239000004065 semiconductor Substances 0.000 claims description 12
- 230000009286 beneficial effect Effects 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- 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)
Abstract
The present invention provides a kind of error amplifier with feedforward compensation network, it is characterized in that, including master gain module, feedforward gain module, gain resistor, compensation resistance, main compensating electric capacity and auxiliary compensation capacitance, the present invention provides two zero points for compensating LC duopole by feedforward compensation network, to in the case where not introducing capacitor in sheet, the stability and response quickly of system are improved, integrated level is high.
Description
Technical field
The present invention relates to field of power supplies, in particular to a kind of error amplifier with feedforward compensation network.
Background technique
Consumer electronics market is persistently expanded in recent years, and ic power field is also rapidly expanding, with power supply core
The continuous reduction of piece cost, the device costs such as capacitor, the resistance of power supply chip periphery far more than chip itself cost, therefore
The size and cost for reducing peripheral components become one of the key factor of power supply IC design.And the core for reducing peripheral components is
The switching frequency of switching power source chip product is improved, but the power supply chip product frequency of the preferable current-mode control of stability can not
It further increases, switching frequency can be increased to 6MHz~8MHz by the power supply chip product of traditional voltage-mode control, therefore
With huge cost advantage, but the power supply chip of voltage-mode control, due to the influence of LC duopole, often stability is poor.
Summary of the invention
In order to solve the above-mentioned technical problem, the present invention proposes following technical scheme:
A kind of error amplifier with feedforward compensation network, including master gain module, feedforward gain module, gain electricity
Resistance, compensation resistance, main compensating electric capacity and auxiliary compensation capacitance；
Wherein master gain module and feedforward gain module are respectively connected to identical input signal VREF and VFB, master gain mould
The output of block is connected with the top crown of the main compensating electric capacity of circuit, the bottom crown ground connection of main compensating electric capacity, feedforward gain module
Output be connected with one end of gain resistor, the other end of gain resistor ground connection, the output of feedforward gain module and auxiliary are mended
The top crown for repaying capacitor is connected, and the lower substrate of auxiliary compensation capacitance is connected with one end of compensation resistance, compensates the another of resistance
One end is connected with the output of the top crown of compensating electric capacity and master gain module, the bottom crown and compensation resistance of auxiliary compensation capacitance
The signal that one end is connected is the output signal of the error amplifier.
Further scheme,
Master gain module includes that 4 p-type metal-oxide-semiconductors are respectively PM1, PM2, PM3 and PM4, further includes having 4 N-type metal-oxide-semiconductors point
Not Wei NM1, NM2, NM3 and NM4, wherein specific connection type is, PM1 and PM2 are input to pipe, and grid connects positive and negative difference respectively
The former pole of input signal, PM1 is connected with the source electrode of PM2, connects bias current signal, the drain electrode of the drain electrode of PM1 and NM2, NM2
The grid of grid and NM1 are connected to form current mirror structure, drain electrode and the drain electrode of NM3, the grid and NM4 of NM3 of PM2
Grid be connected to form mirror-image structure, the drain electrode of NM1 is connected structure with the grid of the drain electrode of PM3, the grid of PM3 and PM4
It is mirrored into structure, the drain terminal of NM4 is connected with the drain terminal of PM4, this signal is the output signal of main gain module, with main compensation electricity
That holds is connected, and connects one end of compensation resistance.
Further scheme,
Feedforward gain module includes that 4 p-type metal-oxide-semiconductors are respectively PM5, PM6, PM7 and PM8, further includes 3 N-type metal-oxide-semiconductors
NM5, NM6 and NM7, wherein specific connection type is that NM5 is connected with PM1 and NM2, another mirror as trsanscondutance amplifier
As output, the drain electrode of NM5 and drain electrode, the grid of PM5 and the grid of PM6 of PM5 are connected to form mirror-image structure, wherein PM6
Breadth length ratio ratio PM5 it is 2 times big, constitute 2 times of enlarged structures of mutual conductance；
The drain electrode of PM6 and drain electrode, the grid of NM6 and the grid of NM7 of NM6 are connected to form mirror-image structure, wherein NM7
Big 4 times of compositions, the 4 times of enlarged structures of mutual conductance of breadth length ratio ratio NM6；
The drain electrode of NM7 and drain electrode, the grid of PM7 and the grid of PM8 of PM7 are connected to form mirror-image structure, wherein PM8
Breadth length ratio ratio PM7 is 4 times big, constitutes 4 times of enlarged structures of mutual conductance.
Further scheme,
Master gain module and feedforward gain module are trsanscondutance amplifier type.
Beneficial effect by adopting the above technical scheme is:
A kind of error amplifier with feedforward compensation network of the present invention, is provided by feedforward compensation network for compensating
Two zero points of LC duopole, to improve the stability and sound of system in the case where not introducing capacitor in sheet
Should quickly, integrated level is high.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the small signal graph of present system；
Fig. 2 is circuit structure schematic diagram of the present invention；
Specific embodiment
A kind of error amplifier with feedforward compensation network of the present invention, including master gain module, feedforward gain module, increasing
Beneficial resistance, compensation resistance, main compensating electric capacity and auxiliary compensation capacitance,
As shown in Figure 1, wherein master gain module and gain module are trsanscondutance amplifier type, wherein master gain module
Mutual conductance is GM, and the mutual conductance of feedforward gain module is hGM, and the ratio of gains feedforward gain module of master gain module is h times big, gain resistor
For resistance R1, compensation resistance is RX, and main compensating electric capacity is that CEA and auxiliary compensation capacitance CX constitutes compensation network, REA, CEA difference
The output resistance and output capacitance of Representative errors amplifier.
Wherein master gain module and feedforward gain module are respectively connected to identical input signal VREF and VFB, master gain mould
The output of block is connected with the top crown of the main compensating electric capacity of circuit, the bottom crown ground connection of main compensating electric capacity, feedforward gain module
Output be connected with one end of gain resistor, the other end of gain resistor ground connection, the output of feedforward gain module and auxiliary are mended
The top crown for repaying capacitor is connected, and the lower substrate of auxiliary compensation capacitance is connected with one end of compensation resistance, compensates the another of resistance
One end is connected with the output of the top crown of compensating electric capacity and master gain module, the bottom crown and compensation resistance of auxiliary compensation capacitance
The signal that one end is connected is the output signal of the error amplifier.
Wherein the output impedance of master gain module is REA, output signal VB, and resistance R1, RX and capacitor CX constitute compensation
Network, REA, CEA respectively represent the output resistance and output capacitance of error amplifier, and Gm indicates error amplifier regular path
Mutual conductance, hGm indicate the mutual conductance of error amplifier fast path, and h is a constant.The transfer function for considering the error amplifier, by
In there is two small signal paths, output is considered as the value that two small signal path superposition generates, and note Gm access is 1 access, hGm
Access is 2 accesses.
For this circuit topological structure, the nodal voltage equation for listing each node is as follows:
VC=VB+(VA-VC)·s·CX·RX
Finally obtain the transmission function of the invention error amplifier are as follows:
From this transmission function as can be seen that the invention error amplifier include two zero points and two poles, two
Zero point is respectively as follows:
Two poles are respectively as follows:
By the reasonable selection to R1, RX, CEA, CX, zero pole point position required for loop stability can produce.
As shown in Fig. 2, it is respectively PM1, PM2, PM3 and PM4 that master gain module, which includes 4 p-type metal-oxide-semiconductors, it further include having 4
N-type metal-oxide-semiconductor is respectively NM1, NM2, NM3 and NM4, wherein specific connection type is, PM1 and PM2 are input to pipe, grid difference
Positive and negative differential input signal is connect, the former pole of PM1 is connected with the source electrode of PM2, connects bias current signal, the drain electrode of PM1 is with NM2's
Drain electrode, the grid of NM2 and NM1 grid be connected to form current mirror structure, the drain electrode of the drain electrode of PM2 and NM3, NM3
The grid of grid and NM4 are connected to form mirror-image structure, the drain electrode of NM1 and drain electrode, the grid of PM3 and the grid of PM4 of PM3
Pole is connected to form mirror-image structure, and the drain terminal of NM4 is connected with the drain terminal of PM4, this signal is the output signal of main gain module,
With being connected for main compensating electric capacity, and connect compensation resistance one end.
Feedforward gain module includes that 4 p-type metal-oxide-semiconductors are respectively PM5, PM6, PM7 and PM8, further includes 3 N-type metal-oxide-semiconductors
NM5, NM6 and NM7, wherein specific connection type is that NM5 is connected with PM1 and NM2, another mirror as trsanscondutance amplifier
As output, the drain electrode of NM5 and drain electrode, the grid of PM5 and the grid of PM6 of PM5 are connected to form mirror-image structure, wherein PM6
Breadth length ratio ratio PM5 it is 2 times big, constitute 2 times of enlarged structures of mutual conductance；The drain electrode of PM6 and the drain electrode of NM6, the grid and NM7 of NM6
Grid be connected to form mirror-image structure, wherein big 4 times of compositions, 4 times of enlarged structures of mutual conductance of NM7 breadth length ratio ratio NM6；The drain electrode of NM7
The grid of drain electrode, PM7 and the grid of PM8 with PM7 are connected to form mirror-image structure, and wherein PM8 breadth length ratio ratio PM7 is 4 times big,
Constitute 4 times of enlarged structures of mutual conductance.
Containing feedforward path to adapt to the quick response of loop under the conditions of loading saving in circuit of the present invention, and provide
Two low frequency zero points can be used for compensating the LC duopole of voltage-mode control DC-DC converter.
Although hereinbefore having been made with reference to some embodiments, present invention is described, of the invention not departing from
In the case where range, it can be carried out various improvement and can with equivalent without replacement technical point therein, especially, as long as
There is no technical contradiction, the various features in the various embodiments of institute's careless mistake of the present invention can be combined by either type and be made
It is only in omitting length and economize on resources with, the description for not carrying out exhaustive row to the case where these combinations in the present invention
Consider.Therefore, the invention is not limited to specific embodiments disclosed herein, and including falling into claim.
Claims (4)
1. a kind of error amplifier with feedforward compensation network, which is characterized in that including master gain module, feedforward gain mould
Block, gain resistor, compensation resistance, main compensating electric capacity and auxiliary compensation capacitance；
Wherein the master gain module and feedforward gain module are respectively connected to identical input signal VREF and VFB, master gain mould
The output of block is connected with the top crown of the main compensating electric capacity of circuit, the bottom crown ground connection of main compensating electric capacity, feedforward gain module
Output be connected with one end of gain resistor, the other end of gain resistor ground connection, the output of feedforward gain module and auxiliary are mended
The top crown for repaying capacitor is connected, and the lower substrate of auxiliary compensation capacitance is connected with one end of compensation resistance, compensates the another of resistance
One end is connected with the output of the top crown of compensating electric capacity and master gain module, the bottom crown and compensation resistance of auxiliary compensation capacitance
The signal that one end is connected is the output signal of the error amplifier.
2. a kind of error amplifier with feedforward compensation network according to claim 1, which is characterized in that the main increasing
Beneficial module includes that 4 p-type metal-oxide-semiconductors are respectively PM1, PM2, PM3 and PM4, further include have 4 N-type metal-oxide-semiconductors be respectively NM1, NM2,
NM3 and NM4, wherein specific connection type is, PM1 and PM2 are input to pipe, and grid meets positive and negative differential input signal, PM1 respectively
Former pole be connected with the source electrode of PM2, connect bias current signal, drain electrode and the drain electrode of NM2, the grid and NM1 of NM2 of PM1
Grid be connected to form current mirror structure, the drain electrode of PM2 is connected with the grid of the drain electrode of NM3, the grid of NM3 and NM4
Composition mirror-image structure is connect, the drain electrode of NM1 and drain electrode, the grid of PM3 and the grid of PM4 of PM3 are connected to form mirror-image structure,
The drain terminal of NM4 is connected with the drain terminal of PM4, this signal is the output signal of main gain module, and being connected for main compensating electric capacity,
And connect one end of compensation resistance.
3. a kind of error amplifier with feedforward compensation network according to claim 2, which is characterized in that the feedforward
Gain module includes that 4 p-type metal-oxide-semiconductors are respectively PM5, PM6, PM7 and PM8, further includes 3 N-types metal-oxide-semiconductor NM5, NM6 and NM7,
Wherein specific connection type is that NM5 is connected with PM1 and NM2, and another mirror image as trsanscondutance amplifier exports, the leakage of NM5
The grid of the drain electrode of pole and PM5, the grid of PM5 and PM6 is connected to form mirror-image structure, and wherein the breadth length ratio ratio PM5 of PM6 is big
2 times, constitute 2 times of enlarged structures of mutual conductance；
The drain electrode of PM6 and drain electrode, the grid of NM6 and the grid of NM7 of NM6 are connected to form mirror-image structure, wherein NM7 wide length
Big 4 times of compositions, 4 times of enlarged structures of mutual conductance of NM6 frequently；
The drain electrode of NM7 and drain electrode, the grid of PM7 and the grid of PM8 of PM7 are connected to form mirror-image structure, wherein PM8 wide length
Frequently PM7 is 4 times big, constitutes 4 times of enlarged structures of mutual conductance.
4. a kind of error amplifier with feedforward compensation network according to claim 1, which is characterized in that the main increasing
Beneficial module and feedforward gain module are trsanscondutance amplifier type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811624526.1A CN109508063B (en) | 2018-12-28 | 2018-12-28 | Error amplifier with feedforward compensation network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811624526.1A CN109508063B (en) | 2018-12-28 | 2018-12-28 | Error amplifier with feedforward compensation network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109508063A true CN109508063A (en) | 2019-03-22 |
| CN109508063B CN109508063B (en) | 2024-03-15 |
Family
ID=65756675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811624526.1A Active CN109508063B (en) | 2018-12-28 | 2018-12-28 | Error amplifier with feedforward compensation network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109508063B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040032533A (en) * | 2002-10-10 | 2004-04-17 | 주식회사 하이닉스반도체 | Method for cancellation of poll-zero of feed-forward amplifier |
| CN101197558A (en) * | 2006-12-07 | 2008-06-11 | 株式会社日立国际电气 | Feed-forward amplifier |
| KR20080086048A (en) * | 2007-03-21 | 2008-09-25 | 엘지전자 주식회사 | Operational amplifier |
| EP2312751A1 (en) * | 2009-10-13 | 2011-04-20 | Sequans Communications | Differential amplifier with common-mode feedback |
| CN103780213A (en) * | 2013-12-24 | 2014-05-07 | 南京中科微电子有限公司 | Multistage operational amplifier |
| CN103986429A (en) * | 2013-02-07 | 2014-08-13 | 联发科技股份有限公司 | Dynamic feed-forward OPAMP-based circuit |
| CN105811889A (en) * | 2016-04-20 | 2016-07-27 | 佛山臻智微芯科技有限公司 | Feedforward compensation type transconductance operational amplifier |
| CN106774614A (en) * | 2016-12-05 | 2017-05-31 | 电子科技大学 | A kind of low pressure difference linear voltage regulator with super transconductance structure |
| CN109004911A (en) * | 2017-06-07 | 2018-12-14 | 亚德诺半导体集团 | The difference amplifier of common mode inhibition with adjusting and circuit with improved common mode rejection ratio |
| CN209231807U (en) * | 2018-12-28 | 2019-08-09 | 西安航天民芯科技有限公司 | A kind of error amplifier with feedforward compensation network |
-
2018
- 2018-12-28 CN CN201811624526.1A patent/CN109508063B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040032533A (en) * | 2002-10-10 | 2004-04-17 | 주식회사 하이닉스반도체 | Method for cancellation of poll-zero of feed-forward amplifier |
| CN101197558A (en) * | 2006-12-07 | 2008-06-11 | 株式会社日立国际电气 | Feed-forward amplifier |
| KR20080086048A (en) * | 2007-03-21 | 2008-09-25 | 엘지전자 주식회사 | Operational amplifier |
| EP2312751A1 (en) * | 2009-10-13 | 2011-04-20 | Sequans Communications | Differential amplifier with common-mode feedback |
| CN103986429A (en) * | 2013-02-07 | 2014-08-13 | 联发科技股份有限公司 | Dynamic feed-forward OPAMP-based circuit |
| CN103780213A (en) * | 2013-12-24 | 2014-05-07 | 南京中科微电子有限公司 | Multistage operational amplifier |
| CN105811889A (en) * | 2016-04-20 | 2016-07-27 | 佛山臻智微芯科技有限公司 | Feedforward compensation type transconductance operational amplifier |
| CN106774614A (en) * | 2016-12-05 | 2017-05-31 | 电子科技大学 | A kind of low pressure difference linear voltage regulator with super transconductance structure |
| CN109004911A (en) * | 2017-06-07 | 2018-12-14 | 亚德诺半导体集团 | The difference amplifier of common mode inhibition with adjusting and circuit with improved common mode rejection ratio |
| CN209231807U (en) * | 2018-12-28 | 2019-08-09 | 西安航天民芯科技有限公司 | A kind of error amplifier with feedforward compensation network |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109508063B (en) | 2024-03-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11082047B2 (en) | Low dropout linear voltage regulator | |
| CN101893908B (en) | Filling in/pulling out current rapid response linear voltage regulator and regulating method | |
| TW200941174A (en) | Power management circuit and method of frequency compensation thereof | |
| CN102880219B (en) | Linear voltage regulator with dynamic compensation characteristic | |
| CN104238613B (en) | A kind of digital circuit low pressure difference linear voltage regulator | |
| CN106537276B (en) | A kind of linear regulator | |
| CN104516391B (en) | The CMOS votage reference source of a kind of low-power consumption low temperature drift | |
| CN103309386A (en) | Self-calibrating stable ldo regulator | |
| CN102999075A (en) | Voltage regulator | |
| TW201217934A (en) | Programmable low dropout linear regulator | |
| CN108508958B (en) | Pseudo-digital low dropout linear regulator and power management chip | |
| US9477246B2 (en) | Low dropout voltage regulator circuits | |
| CN108803764A (en) | A kind of LDO circuit of fast transient response | |
| CN108776500A (en) | It is a kind of based on frequency compensation and transient response improve circuit without capacitance LDO outside piece | |
| CN108241396A (en) | A kind of low pressure difference linear voltage regulator for improving transient response speed | |
| CN104950976B (en) | Voltage stabilizing circuit based on slew rate increasing | |
| CN108258897B (en) | Charge pump device and method for operating charge pump device | |
| CN209231807U (en) | A kind of error amplifier with feedforward compensation network | |
| CN113741610B (en) | Reference voltage circuit and chip | |
| CN115333334A (en) | Switching power supply apparatus | |
| CN103279163A (en) | High-power-voltage-rejection-rate capacitor-free low-voltage-difference voltage regulator | |
| CN113359928A (en) | Voltage generating circuit | |
| CN109508063A (en) | A kind of error amplifier with feedforward compensation network | |
| CN115237193B (en) | LDO system suitable for low-voltage input and large-current output | |
| CN215117303U (en) | Voltage generating circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Dong Lei Inventor after: Sun Quan Inventor before: Wang Xiaofei Inventor before: Dong Lei Inventor before: Sun Quan |
|
| CB03 | Change of inventor or designer information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |