CN103107800A - Method capable of fast and stably starting control loop and circuit of control loop - Google Patents
Method capable of fast and stably starting control loop and circuit of control loop Download PDFInfo
- Publication number
- CN103107800A CN103107800A CN2012105488578A CN201210548857A CN103107800A CN 103107800 A CN103107800 A CN 103107800A CN 2012105488578 A CN2012105488578 A CN 2012105488578A CN 201210548857 A CN201210548857 A CN 201210548857A CN 103107800 A CN103107800 A CN 103107800A
- Authority
- CN
- China
- Prior art keywords
- loop
- control signal
- startup
- control
- starting current
- 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)
- Control Of Voltage And Current In General (AREA)
Abstract
The invention discloses a method capable of fast and stably starting a control loop and a circuit of a control loop. Firstly, a control signal which is used for starting and has a certain deviation with expected stable value of a control signal is established. When the loop is started, the control signal for starting is compared with a feedback signal to obtain a comparative result to control starting current generating network to charge a loop compensation capacitor. When the circuit is about to reach a steady state working point, the comparative result is in a reversal phase, a charging current is cut off, and the steady state can be reached through automatic adjustment of the system loop. Due to the facts that in the process of starting the loop, electric charge needed for establishing stabilizing voltage on the loop compensation capacitor is provided by a differential current generated through self-adjustment of the loop, and in addition, currents except the loop are capable of automatically cutting off and is introduced for providing the needed electric charge, and the purpose of fast and stably starting the control loop is achieved.
Description
Technical field
The present invention relates to a kind of semiconductor integrated circuit, particularly a kind of energy quick and stable starts method and the circuit thereof of control loop.
Background technology
In Analog Circuit Design, the startup of circuit is the problem that people often encounter.Can circuit start, and the speed of startup how, is very important.
Realizing accurate control, is the main purpose of Analog Circuit Design, is the most important method that realizes control and adopt loop to control.The system that contains control loop generally all contains the degeneracy point.If do not take measures, after system powers on, generally all be under degeneracy point (the zero current degeneracy point) control that there is no current flowing, circuit might be able to not start.In addition, analog control circuit utilizes the error amplification of operational amplifier often, by feedback control loop, reduces error, reaches the purpose of accurate control.And error is amplified required high-gain, often needs two-stage or more multistage amplifying stage to realize, therefore must compensate circuit, just can make loop stability work.Common way is that the high resistant point access electric capacity at circuit changes the limit relative position, guarantees loop stability work.No matter be the parasitic capacitance of circuit, or the building-out capacitor of introducing in addition, change to the steady operation point from unexpected steady operation point, current potential on it often changes, therefore need circuit that corresponding net charge is provided, make capacitance voltage that corresponding the variation occur, finally set up the DC operation node.Due to building-out capacitor, generally all much bigger than other parasitic capacitance, each node is set up the required electric charge of DC operation point voltage, and often, the required electric charge of building-out capacitor potential change is maximum.Therefore, building-out capacitor has often limited the toggle speed of circuit.
The method of common startup control loop is between the path of power supply, a resistive path is set, by detecting the signal that is produced by this resistive path, make whole system break away from zero current degeneracy point, the difference current that utilizes the operational amplifier error ratio to produce provides aforementioned building-out capacitor potential change required electric charge.In this course, by self loop adjustment, system sets up dc point gradually.For start quickly speed, usual way has two kinds:
1) increase the quiescent current of operational amplifier, strengthen the error current in start-up course, the voltage on electric capacity is set up faster.But this is to increase quiescent dissipation as cost.
2) with the form of open loop, pour into electric current to building-out capacitor.But because the final steady state voltage on electric capacity can not be determined in advance, the overtension on electric capacity or too low causes to occur overshoot in system starting process, or starts slow problem.
Summary of the invention
The problem that the present invention solves is that the quiescent dissipation that occurs in quickening control loop start-up course is excessive, or overshoot is excessive, or starts fast not problem.
In order to address the above problem, the invention discloses method and circuit thereof that a kind of energy quick and stable starts control loop.Concrete scheme is: first set up one and expect that with control signal stationary value has the startup control signal of certain deviation, when loop start, start and make comparisons with control signal and feedback signal, the comparative result that obtains is controlled starting current generation network to the loop compensation capacitor charging, when circuit is about to reach steady operation point, comparative result is anti-phase, cuts off this charging current, is automatically adjusted by system's loop subsequently to reach stable state.Due in the loop start process, on loop compensation electric capacity burning voltage set up required electric charge, except the difference current that is produced by loop self adjustment provides, also introduced the electric current outside the loop that can automatically cut off, therefore, reached the purpose of quick and stable startup control loop.
As shown in Figure 1, a kind of energy quick and stable disclosed by the invention starts method and the circuit thereof of control loop, comprise: start with comparator (comparator), starting current generation network (cur_start), deviation generator (Vos), other be control loop, comprising: control signal generator (Vsig), operational amplifier (opamp), compensating network (network_comp), actuator (actuator).A differential input end of operational amplifier is received in the output of control signal generator (Vsig) by node Nref, Nref also receives the end of deviation generator Vos; The input sin of compensating network (network_comp) is received in the output of operational amplifier by node Nop_out; The output sout of compensating network receives the input of actuator by node Ncomp; The output sampling of actuator is received node Nfb by the sampling output port sout of actuator, and Nfb also receives a differential input end of comparator, and another differential input end of operational amplifier; The other end of bias signal generator also receives by node Nref_os another differential input end that starts with comparator; The output that starts with comparator is connected with starting current generation network by node Ncomp_out; The output of starting current generation network is connected with compensating network (network_comp) starting current access interface ist by node Nst_cap.Here exemplaryly provided an output and started with electric current the insensitive starting current generation of supply voltage network: formed by three PMOS transistors (PMst1, PMst2, PMst3) and a resistance R st, the source of PMst1, the end of resistance R st is connected in power junctions Nvdda; The drain terminal of PMst1, grid, the source of PMst2 is connected in node Nvst; The drain terminal of PMst2, grid, the grid end of PMst3 is connected in node Ncomp_out with the output that starts with comparator; The other end of Rst and the source of Pst3 are connected in node Nres; The output of starting current generation network, i.e. the drain terminal of PMst3 is connected in node Nst_cap with the ist port of compensating network.
above-mentioned control signal, has various ways, as being voltage, electric current, electric charge, with voltage as signal form, the circuit working process prescription is as follows: first set up one by deviation generator (Vos) and expect that with control signal stationary value (output voltage of Vsig) has the startup control signal (voltage of node Nref_os) of certain deviation, when loop start, this startup is made comparisons by startup comparator (comparator) with control signal and feedback signal (voltage on node Nfb), the comparative result that obtains (voltage on node Ncomp_out) is controlled starting current generation network (cur_start), give loop compensation electric capacity (Cap) charging, when circuit is about to reach steady operation point, comparative result is anti-phase, stop this charging operations, automatically adjusted by system's loop subsequently and reach stable state.
An advantage of this scheme is, due in the loop start process, on loop compensation electric capacity burning voltage set up required electric current, except the electric current that loop self adjustment produces, also introduced the electric current outside the loop, therefore, start-up course is accelerated greatly.
Another advantage of this scheme is, because the deviation generator has been set up one and with control signal expection stationary value, the startup control signal of certain deviation has been arranged, this deviation guaranteed, before system reached stationary value, starting current generation network can in time turn-off and accelerate the electric current that starts.Thereby can not introduce the common too fast overshooting problem of toggle speed of following.
Below only exemplary, with voltage signal, the circuit working process is described, in fact, signal can occur with various forms, as voltage, electric current, electric charge etc.
Description of drawings
Below in conjunction with drawings and Examples, the present invention is done further detailed explanation:
Fig. 1: technical scheme schematic diagram disclosed by the invention;
Fig. 2: specific embodiment 1 disclosed by the invention;
Fig. 3: specific embodiment 2 disclosed by the invention;
Fig. 4: specific embodiment 3 disclosed by the invention;
Fig. 5: specific embodiment 4 disclosed by the invention.
Embodiment
Below by specific instantiation explanation embodiments of the present invention, see also Fig. 2 to Fig. 5.Those skilled in the art can understand other advantages of the present invention and effect easily by content disclosed in the present specification.The present invention can also be implemented or be used by other different embodiment.Every details in this specification also can be based on different viewpoints and application, carries out various modifications or change under spirit of the present invention not deviating from.
One embodiment of the present of invention as shown in Figure 2.This embodiment is to the compensating network in Fig. 1 (network_comp), and actuator (actuator) has carried out concrete refinement.Compensating network includes only a building-out capacitor, three ports of compensating network: input port sin, output port sout, starting current access interface ist, all to receive on the same pole plate of building-out capacitor, and another pole plate of electric capacity is connected to the ground.Actuator is made of a nmos pass transistor (NMactor) and resistance (Ractor).Wherein the end of Ractor is connected to the ground, and the source of the other end and NMactor is connected by the output port sout of actuator; The grid end of NMactor is connected with the input sin of actuator; The drain terminal of NMactor is connected with power junctions Nvdda.Other parts of circuit corresponding with Fig. 1 in identical.
One embodiment of the present of invention as shown in Figure 3.This embodiment is except compensating network (network_comp), and the embodiment with in Fig. 2 corresponding to other parts is identical.The compensating network of this embodiment is in series by resistance-capacitance network, three ports of compensating network: input port sin, output port sout, starting current access interface ist, and all receiving is an end of resistance, the other end of electric capacity is connected to the ground.
One embodiment of the present of invention as shown in Figure 4.This embodiment is except compensating network (network_comp), and the embodiment with in Fig. 2 corresponding to other parts is identical.The compensating network of this embodiment is in series by resistance-capacitance network, and resistance is connected with starting current access interface ist with the common node of electric capacity; The input port sin of the other end of resistance and compensating network, output port sout are Same Vertices; The non-resistance link of electric capacity is connected to the ground.
One embodiment of the present of invention as shown in Figure 5.Not identical with the embodiment of front is, the stable state current potential on control signal, building-out capacitor is take power line as exchanging ground, but the principle of technical scheme is the same.Concrete structure is described below: a differential input end of operational amplifier is received in the output of control signal generator (Vsig) by node Nref, Nref also receives the end of deviation generator Vos; The input sin of compensating network (Network_comp) is received in the output of operational amplifier by node Nop_out; The output sout of compensating network receives the input port sin of actuator by node Ncomp; The input port sin of compensating network, output port sout all connect with building-out capacitor Cap by a resistance R comp and receive power junctions Nvdda, and resistance R comp and building-out capacitor Cap tie point are the current input terminal mouth ist of compensating network; The output sampling of actuator is received node Nfb by the sampling output port sout of actuator, and Nfb also receives a differential input end of comparator, and another differential input end of operational amplifier; The other end of bias signal generator also receives by node Nref_os another differential input end that starts with comparator; The output that starts with comparator (comparator) is connected with starting current generation network by node Ncomp_out; The output of starting current generation network is connected with compensating network (network_comp) starting current access interface ist by node Nst_cap.Here exemplaryly provided an output and started with electric current the insensitive starting current generation of supply voltage network: formed by three nmos pass transistors (NMst1, NMst2, NMst3) and a resistance R st, the source of NMst1, the end of resistance R st are connected in power supply ground; The drain terminal of NMst1, grid, the source of NMst2 is connected in node Nvst; The drain terminal of NMst2, grid, the grid end of NMst3 is connected in node Ncomp_out with the output that starts with comparator; The other end of Rst and the source of NMst3 are connected in node Nres; The output of starting current generation network, i.e. the drain terminal of NMst3 is connected in node Nst_cap with the ist port of compensating network.In addition, the exemplary internal structure that has provided actuator here: consisted of by a PMOS transistor (PMactor) and resistance (Ractor).Wherein the end of Ractor is connected with power junctions Nvdda, and the source of the other end and PMactor is connected by the output port sout of actuator; The grid end of PMactor is connected with the input sin of actuator; What the drain terminal of PMactor was exemplary is connected with power supply ground.
Above-described embodiment is exemplary illustration principle of the present invention and effect thereof only, but not is used for restriction the present invention.The person skilled in the art all can under spirit of the present invention and category, modify or change above-described embodiment.Therefore, have in technical field under such as and know that usually the knowledgeable modifies or changes not breaking away from all equivalences of completing under the suggested spirit of the present invention and technological thought, is still contained by claim of the present invention.
Claims (6)
1. method and the circuit thereof of an energy quick and stable startup control loop, is characterized in that, comprises at least:
Deviation generator (1)
Start with comparator (2);
Starting current generation network (3).
2. a kind of method and circuit thereof that can quick and stable starts control loop as claimed in claim 1, is characterized in that, sets up one by deviation generation module (1) and expect that with control signal stationary value has the startup control signal of certain deviation; When loop start, startup is made comparisons by startup comparator (2) and feedback signal with control signal, the comparative result that obtains is controlled starting current generation network (3), give the loop compensation capacitor charging, when loop is about to reach steady operation point, comparative result is anti-phase, cuts off this charging operations, is automatically adjusted by system's loop subsequently to reach stable state.
3. deviation generation module as claimed in claim 2 (1), it is characterized in that, set up one and expected that with control signal stationary value has the startup control signal of certain deviation, this deviation has guaranteed, before system reaches stationary value, starting current generation network (3) can in time turn-off and accelerate the electric current that starts, thereby can not introduce the common too fast overshooting problem of toggle speed of following.
4. startup as claimed in claim 2 with comparator (2), is characterized in that having two input signals at least: by the startup control signal that deviation generation module (1) is set up, control loop feedback signal; Its output signal is controlled starting current generation network (3), make starting current generation network (3) at the loop start initial stage to the loop compensation capacitor charging; When loop was about to reach steady operation point, comparative result was anti-phase, cut off this charging operations, was automatically adjusted by system's loop subsequently to reach stable state.
5. starting current generation network as claimed in claim 2 (3), it is characterized in that, accept to start the control with comparator (2), when loop start, startup is made comparisons by startup comparator (2) and feedback signal with control signal, the comparative result that obtains is controlled starting current generation network (3), give the loop compensation capacitor charging, when loop is about to reach steady operation point, comparative result is anti-phase, cut off this charging operations, reach stable state by automatic adjustment of system's loop subsequently.
6. control signal as claimed in claim 2, is characterized in that, this control signal has various ways, as being voltage, electric current, electric charge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210548857.8A CN103107800B (en) | 2012-12-13 | 2012-12-13 | A kind of energy quick and stable starts method and the circuit thereof controlling loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210548857.8A CN103107800B (en) | 2012-12-13 | 2012-12-13 | A kind of energy quick and stable starts method and the circuit thereof controlling loop |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103107800A true CN103107800A (en) | 2013-05-15 |
| CN103107800B CN103107800B (en) | 2016-08-17 |
Family
ID=48315407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210548857.8A Active CN103107800B (en) | 2012-12-13 | 2012-12-13 | A kind of energy quick and stable starts method and the circuit thereof controlling loop |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103107800B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105099159A (en) * | 2015-08-21 | 2015-11-25 | 电子科技大学 | Quick starting circuit for DC-DC converter |
| CN112350888A (en) * | 2020-10-23 | 2021-02-09 | 英业达科技有限公司 | Starting state detection system and method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1501574A (en) * | 2002-11-14 | 2004-06-02 | 罗姆股份有限公司 | Switch power supply apparatus and controller IC thereof |
| US20040155635A1 (en) * | 2003-02-06 | 2004-08-12 | Katsumi Inaba | Stabilized power supply-use device, and switching power supply and electronic device using the same |
| CN101084621A (en) * | 2004-12-21 | 2007-12-05 | 罗姆股份有限公司 | Switching regulator |
| CN101529983A (en) * | 2006-10-25 | 2009-09-09 | 松下电工株式会社 | LED lighting circuit and illuminating apparatus using the same |
-
2012
- 2012-12-13 CN CN201210548857.8A patent/CN103107800B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1501574A (en) * | 2002-11-14 | 2004-06-02 | 罗姆股份有限公司 | Switch power supply apparatus and controller IC thereof |
| US20040155635A1 (en) * | 2003-02-06 | 2004-08-12 | Katsumi Inaba | Stabilized power supply-use device, and switching power supply and electronic device using the same |
| CN101084621A (en) * | 2004-12-21 | 2007-12-05 | 罗姆股份有限公司 | Switching regulator |
| CN101529983A (en) * | 2006-10-25 | 2009-09-09 | 松下电工株式会社 | LED lighting circuit and illuminating apparatus using the same |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105099159A (en) * | 2015-08-21 | 2015-11-25 | 电子科技大学 | Quick starting circuit for DC-DC converter |
| CN105099159B (en) * | 2015-08-21 | 2017-08-29 | 电子科技大学 | A kind of fast start circuit for DC DC converters |
| CN112350888A (en) * | 2020-10-23 | 2021-02-09 | 英业达科技有限公司 | Starting state detection system and method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103107800B (en) | 2016-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1848019B (en) | Constant voltage power supply circuit and method of testing the same | |
| US9454164B2 (en) | Method and apparatus for limiting startup inrush current for low dropout regulator | |
| CN105468075B (en) | Negative pressure charge pump feedback circuit | |
| CN105652949A (en) | Voltage regulator with soft start circuit | |
| CN104750150A (en) | Voltage regulator and electronic apparatus | |
| CN102681579A (en) | Voltage regulator | |
| CN106788356B (en) | A kind of linear voltage regulator with real-time frequency compensation function | |
| CN104699162A (en) | Quick-response low-dropout regulator | |
| CN105955387B (en) | A kind of bicyclic protection low voltage difference LDO linear voltage regulators | |
| JP2007048283A (en) | Zero cancellation in multiloop voltage regulator control scheme | |
| JP2015118452A (en) | Voltage regulator | |
| US20150311691A1 (en) | Overcurrent protection circuit, semiconductor device and voltage regulator | |
| CN101840242A (en) | CMOS low power consumption voltage current offset start-up circuit | |
| CN103809647A (en) | Reference voltage source with high power supply rejection ratio | |
| CN103809645A (en) | Starting circuit for wide power band gap reference source | |
| CN103107800A (en) | Method capable of fast and stably starting control loop and circuit of control loop | |
| US10261533B2 (en) | Low dropout regulator (LDO) circuit | |
| US10095260B2 (en) | Start-up circuit arranged to initialize a circuit portion | |
| TWI468894B (en) | Low dropout regulator with improved transient response | |
| US9385658B2 (en) | Fast recovery scheme of transconductance gain for folded cascode amplifier | |
| KR20150136401A (en) | Band gap reference voltage circuit | |
| CN107395146B (en) | Constant transconductance amplifier circuit | |
| KR20130024556A (en) | Power amplifier system | |
| JP2010050619A (en) | Optical receiving amplifier | |
| CN210244187U (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 | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 510663 8th floor, building C2, Chuangxin building, No. 182, Kexue Avenue, Huangpu District, Guangzhou, Guangdong Patentee after: Guangzhou Huizhi Microelectronics Co.,Ltd. Address before: 510663 unit c2-307, innovation building, No. 182, science Avenue, Science City, high tech Industrial Development Zone, Guangzhou, Guangdong Province Patentee before: SMARTER MICROELECTRONICS (GUANG ZHOU) Co.,Ltd. |