CN103107800B - A kind of energy quick and stable starts method and the circuit thereof controlling loop - Google Patents
A kind of energy quick and stable starts method and the circuit thereof controlling loop Download PDFInfo
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- CN103107800B CN103107800B CN201210548857.8A CN201210548857A CN103107800B CN 103107800 B CN103107800 B CN 103107800B CN 201210548857 A CN201210548857 A CN 201210548857A CN 103107800 B CN103107800 B CN 103107800B
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Abstract
The invention discloses a kind of energy quick and stable and start method and the circuit thereof controlling loop.First set up a startup control signal having certain deviation with control signal expection stationary value, when loop start, startup control signal is made comparisons with feedback signal, the comparative result obtained controls starting current generation network and charges to loop compensation electric capacity, when circuit is i.e. up to steady operation point, comparative result is anti-phase, cuts off this charging current, is automatically adjusted by system loop subsequently and reach stable state.Due to during loop start, electric charge needed for the foundation of burning voltage on loop compensation electric capacity, in addition to being adjusted, by loop self, the difference current produced and providing, also introduces the electric current outside the loop that can automatically cut off, therefore, reach quick and stable and start the purpose controlling loop.
Description
Technical field
The present invention relates to a kind of semiconductor integrated circuit, start method and the circuit thereof controlling loop particularly to a kind of energy quick and stable.
Background technology
In Analog Circuit Design, the startup of circuit is people's problems through being commonly encountered.Can circuit start, and the speed of startup how, is very important.
Realize accurately controlling, be the main purpose of Analog Circuit Design, and use loop to control the most important method being to realize controlling.Degeneracy point is the most all contained containing the system controlling loop.If taking no action to, after system electrification, typically all in do not have electric current to flow degeneracy point (zero current degeneracy point) control under, circuit likely can not start.It addition, analog control circuit utilizes the error amplification of operational amplifier often, by feedback control loop, reduce error, reach the purpose accurately controlled.And the high-gain needed for error amplification, generally require two-stage or more stages amplifier stage could realize, it is therefore necessary to circuit is compensated, loop stability just can be made to work.Common practice is, the high resistant point at circuit accesses electric capacity, makes limit change relative to position, it is ensured that loop stability works.Whether the parasitic capacitance of circuit, or the compensation electric capacity additionally introduced, change to steady operation point from unexpected steady operation point, current potential thereon tends to occur change, it is thus desirable to circuit provides corresponding net charge, make capacitance voltage that corresponding change to occur, finally set up DC operation node.Owing to compensating electric capacity, all the most much greater than other parasitic capacitance, each node sets up the electric charge needed for DC operation point voltage, and often, needed for compensating electric capacity potential change, electric charge is most.Therefore, compensate electric capacity and often limit the toggle speed of circuit.
The common method starting control loop is between the path of power supply, one resistive path is set, the signal produced by this resistive path by detection, make whole system depart from zero current degeneracy point, utilize difference current produced by operational amplifier application condition to provide the electric charge needed for aforementioned backoff electric capacity potential change.In this course, being adjusted by self loop, system gradually builds up DC point.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, make the voltage on electric capacity set up faster.But this is to increase quiescent dissipation as cost.
2) with the form of open loop, give and compensate electric capacity perfusion electric current.But owing to the final steady state voltage on electric capacity cannot be determined beforehand, the overtension or too low on electric capacity, causes and occurred punching in system starting process, or started slow problem.
Summary of the invention
The problem that the present invention solves is, the quiescent dissipation accelerating to control occur during loop start is excessive, or crosses and break through big, or starts the fastest problem.
In order to solve the problems referred to above, the invention discloses a kind of energy quick and stable and start method and the circuit thereof controlling loop.Concrete scheme is: first set up a startup control signal having certain deviation with control signal expection stationary value, when loop start, startup control signal is made comparisons with feedback signal, the comparative result obtained controls starting current generation network and charges to loop compensation electric capacity, when circuit is i.e. up to steady operation point, comparative result is anti-phase, cuts off this charging current, is automatically adjusted by system loop subsequently and reach stable state.Due to during loop start, electric charge needed for the foundation of burning voltage on loop compensation electric capacity, in addition to being adjusted, by loop self, the difference current produced and providing, also introduces the electric current outside the loop that can automatically cut off, therefore, reach quick and stable and start the purpose controlling loop.
As shown in Figure 1, a kind of energy quick and stable disclosed by the invention starts method and the circuit thereof controlling loop, including: start with comparator (comparator), starting current generation network (cur_start), deviation generator (Vos), other for controlling loop, including: control signal generator (Vsig), operational amplifier (opamp), compensate network (network_comp), executor (actuator).A differential input end of operational amplifier is received in the output of control signal generator (Vsig) by node Nref, and Nref is also coupled to one end of deviation generator Vos；The input sin compensating network (network_comp) is received in the output of operational amplifier by node Nop_out；The output sout compensating network receives the input of executor by node Ncomp；The output sampling of executor receives node Nfb by the sampled output mouth sout of executor, and Nfb is also coupled to a differential input end of comparator, and another differential input end of operational amplifier；The other end of bias signal generator receives another differential input end of startup comparator also by node Nref_os；The output of startup 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.The most exemplary gives an output startup electric current starting current generation network insensitive to supply voltage: be made up of three PMOS transistor (PMst1, PMst2, PMst3) and a resistance Rst, the source of PMst1, one end of resistance Rst is connected to power junctions Nvdda；The drain terminal of PMst1, grid, the source of PMst2 is connected to node Nvst；The drain terminal of PMst2, grid, the grid end of PMst3, the output with startup comparator is connected to node Ncomp_out；The other end of Rst and the source of Pst3 are connected to node Nres；The output of starting current generation network, i.e. the drain terminal of PMst3, it is connected to node Nst_cap with the ist port compensating network.
nullAbove-mentioned control signal，There is various ways，As being voltage，Electric current，Electric charge，Using voltage as signal form，Circuit work process is described as follows: first set up a startup control signal (voltage of node Nref_os) having certain deviation with control signal expection stationary value (output voltage of Vsig) by deviation generator (Vos)，When loop start，This startup control signal is made comparisons by startup comparator (comparator) with feedback signal (voltage on node Nfb)，The comparative result (voltage on node Ncomp_out) obtained controls starting current generation network (cur_start)，Charge to loop compensation electric capacity (Cap)，When circuit is i.e. up to steady operation point，Comparative result is anti-phase，Stop this charging operations，Automatically adjusted by system loop subsequently and reach stable state.
One advantage of the program is, due to during loop start, and electric current needed for the foundation of burning voltage on loop compensation electric capacity, in addition to loop self adjusts the electric current produced, also introduce the electric current outside loop, therefore, start-up course greatly speeds up.
The another advantage of the program is, owing to deviation generator establishes a startup control signal having certain deviation with control signal expection stationary value, this deviation ensure that, before system reaches stationary value, starting current generation network can turn off the electric current accelerating to start in time.Because of the overshooting problem too fast without introducing common adjoint toggle speed.
The most merely illustrative, with voltage signal, circuit work process is described, it practice, signal can occur in a variety of manners, such as voltage, electric current, electric charge etc..
Accompanying drawing explanation
With embodiment, the present invention is further described in detail below in conjunction with the accompanying drawings:
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.
Detailed description of the invention
Below by specific instantiation, embodiments of the present invention are described, refer to Fig. 2 to Fig. 5.Those skilled in the art can be understood other advantages and effect of the present invention easily by content disclosed in the present specification.The present invention can also be carried out by the most different detailed description of the invention or apply.Every details in this specification can also carry out various modification or change based on different viewpoints and application under the spirit without departing from the present invention.
One embodiment of the present of invention is as shown in Figure 2.This embodiment has carried out concrete refinement to the compensation network (network_comp) in Fig. 1, executor (actuator).Compensating network and only include a compensation electric capacity, three ports of compensation network: input port sin, output port sout, starting current access interface ist, all receive on the same pole plate compensating electric capacity, another pole plate of electric capacity is connected to the ground.Executor is made up of a nmos pass transistor (NMactor) and resistance (Ractor).Wherein one end of Ractor is connected to the ground, and the other end is connected by the output port sout of executor with the source of NMactor；The grid end of NMactor is connected with the input sin of executor；The drain terminal of NMactor is connected with power junctions Nvdda.Corresponding identical with Fig. 1 of other parts of circuit.
One embodiment of the present of invention is as shown in Figure 3.This embodiment is in addition to compensating network (network_comp), and corresponding and in Fig. 2 the embodiment of other parts is identical.The compensation network of this embodiment is in series by resistance-capacitance network, compensates three ports of network: input port sin, output port sout, starting current access interface ist, all receiving is one end of resistance, and the other end of electric capacity is then connected to the ground.
One embodiment of the present of invention is as shown in Figure 4.This embodiment is in addition to compensating network (network_comp), and corresponding and in Fig. 2 the embodiment of other parts is identical.The compensation 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 other end of resistance is Same Vertices with compensation the input port sin of network, output port sout；The non-resistive of electric capacity connects end and is connected to the ground.
One embodiment of the present of invention is as shown in Figure 5.Differing with embodiment above, control signal, the steady state potential compensated on electric capacity are with power line as AC deposition, 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, and Nref is also coupled to one end of deviation generator Vos；The input sin compensating network (Network_comp) is received in the output of operational amplifier by node Nop_out；The output sout compensating network receives the input port sin of executor by node Ncomp；The input port sin, output port sout that compensate network all connects by a resistance Rcomp receive power junctions Nvdda with compensating electric capacity Cap, resistance Rcomp and the current input terminal mouth ist that compensation electric capacity Cap junction point is compensation network；The output sampling of executor receives node Nfb by the sampled output mouth sout of executor, and Nfb is also coupled to a differential input end of comparator, and another differential input end of operational amplifier；The other end of bias signal generator receives another differential input end of startup comparator also by node Nref_os；Start and be connected with starting current generation network by node Ncomp_out with the output of comparator (comparator)；The output of starting current generation network is connected with compensating network (network_comp) starting current access interface ist by node Nst_cap.The most exemplary gives an output startup electric current starting current generation network insensitive to supply voltage: be made up of three nmos pass transistors (NMst1, NMst2, NMst3) and a resistance Rst, the source of NMst1, one end of resistance Rst is connected to power supply ground；The drain terminal of NMst1, grid, the source of NMst2 is connected to node Nvst；The drain terminal of NMst2, grid, the grid end of NMst3, the output with startup comparator is connected to node Ncomp_out；The other end of Rst and the source of NMst3 are connected to node Nres；The output of starting current generation network, i.e. the drain terminal of NMst3, it is connected to node Nst_cap with the ist port compensating network.It addition, the most exemplary internal structure giving executor: it is made up of a PMOS transistor (PMactor) and resistance (Ractor).Wherein one end of Ractor is connected with power junctions Nvdda, and the other end is connected by the output port sout of executor with the source of PMactor；The grid end of PMactor is connected with the input sin of executor；The drain terminal of PMactor exemplary with power supply be connected.
The principle of above-described embodiment merely exemplary explanation present invention and effect thereof, not for limiting the present invention.Above-described embodiment all can be modified under the spirit and the scope of the present invention or change by person skilled in the art.Therefore, art has all equivalence modification or changes that usually intellectual is completed under without departing from the spirit suggested by the present invention and technological thought such as, is still contained by the claim of the present invention.
Claims (4)
1. one kind quick and stable can start the circuit controlling loop, it is characterised in that at least include:
Deviation generator (1)；
Start with comparator (2)；And
Starting current generation network (3)；
Described control loop includes: control signal generator, operational amplifier, compensation network；Wherein,
A startup control signal having certain deviation with control signal expection stationary value is set up by deviation generator (1)；When controlling loop start,
Startup control signal is made comparisons with feedback signal by startup comparator (2), and the comparative result obtained controls starting current generation network (3),
Giving the compensation electric capacity charging controlling to compensate network in loop, when controlling loop and being i.e. up to steady operation point, comparative result is anti-phase, and cutting off should
Charging operations, is automatically adjusted by control loop subsequently and reaches stable state；
Described deviation generator (1) establishes a control signal expection stationary value produced with control signal generator has the startup of certain deviation to control
Signal processed, this deviation ensure that, before system reaches stationary value, starting current generation network (3) can turn off the electric current accelerating to start in time,
Because of the overshooting problem too fast without introducing common adjoint toggle speed；
Controlling during loop start, electric current needed for the foundation of burning voltage on described compensation electric capacity, except adjusting and produce by controlling loop self
Difference current provide outside, also introduce can automatically cut off control the electric current outside loop.
2. as claimed in claim 1 quick and stable can start the circuit controlling loop, it is characterised in that described startup comparator (2) at least two
Individual input signal: the startup control signal set up by deviation generator (1), controls loop feedback signal；Its output signal controls to start electricity
There is network (3) in stream, makes starting current generation network (3) charge to loop compensation electric capacity at the loop start initial stage；I.e. it is up to surely at loop
During state operating point, comparative result is anti-phase, cuts off this charging operations, is automatically adjusted by system loop subsequently and reach stable state.
3. quick and stable can start the circuit controlling loop as claimed in claim 1, it is characterised in that described starting current generation network (3) accepts
Starting the control with comparator (2), when loop start, startup control signal is made to compare by startup comparator (2) and feedback signal
Relatively, the comparative result obtained controls starting current generation network (3), charges to loop compensation electric capacity, is i.e. up to steady operation point at loop
Time, comparative result is anti-phase, cuts off this charging operations, is automatically adjusted by system loop subsequently and reach stable state.
4. quick and stable can start the circuit controlling loop as claimed in claim 1, it is characterised in that described control signal has various ways, for
Voltage, or be electric current, or be electric charge.
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| 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 |
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| 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 |
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| CN103107800B true CN103107800B (en) | 2016-08-17 |
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| CN105099159B (en) * | 2015-08-21 | 2017-08-29 | 电子科技大学 | A kind of fast start circuit for DC DC converters |
| CN112350888B (en) * | 2020-10-23 | 2022-10-11 | 英业达科技有限公司 | Starting state detection system and method thereof |
Citations (3)
| 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 |
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4163019B2 (en) * | 2003-02-06 | 2008-10-08 | シャープ株式会社 | Stabilized power supply device, switching power supply using the same, and electronic equipment |
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Patent Citations (3)
| 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 |
| 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 |
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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. |
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