CN105335974A - Phase calibration method, apparatus and equipment - Google Patents
Phase calibration method, apparatus and equipment Download PDFInfo
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- CN105335974A CN105335974A CN201510685238.7A CN201510685238A CN105335974A CN 105335974 A CN105335974 A CN 105335974A CN 201510685238 A CN201510685238 A CN 201510685238A CN 105335974 A CN105335974 A CN 105335974A
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Abstract
The invention discloses a phase calibration method, apparatus and equipment. The phase calibration method comprises acquiring a stable index signal of a negative feedback circuit; detecting the stable index signal, and determining whether the negative feedback circuit is stable; when the negative feedback circuit is not stable, detecting the stable phase interval for the negative feedback circuit, and determining the optimum phase according to the stable phase interval; and inputting the optimum phase as the phase of an input signal of the negative feedback circuit. Through the above scheme, the phase calibration method can realize calibration of phase information and guarantee the stability of equipment without changing the original negative feedback system design thought, and is universal among different systems, and is high in easy use.
Description
Technical field
The present invention relates to control field, particularly relate to a kind of method of phase alignment, device and equipment.
Background technology
Along with the development of the communication technology and observation and control technology, the accuracy requirement to equipment of various measuring and controlling equipment, communication facilities is also more and more higher, but because signal is in collection or transmitting procedure, generally all more or less can there is loss of signal, namely occur phase offset, in order to ensure the stability of Signal transmissions, increasing equipment can carry out the accurate control of phase information, such as, the calibration to realizing phase place is carried out by degeneration factor equipment or increase negative-feedback circuit.
As shown in Figure 1, Fig. 1 is the structural representation of degeneration factor of the prior art.Feedback system comprise input signal A, output signal B and feedback signal C, in order to ensure validity and the job stability of degeneration factor, so feedback signal C phase value must with the phase value of input signal A keep 180 difference.But due to the existence of loss of signal, generally the difference of the phase value of feedback signal C and the phase value of input signal A generally all can not remain on 180 degree, the stability of further influential system.
In order to solve the problem, prior art is generally adopt or feedback system inner detection, the examination of carrying out phase information inner from feedback circuit, and compensate according to or the inner phase deviation detected of feedback system inner from feedback circuit further, revise.By said method, although can realization to a certain degree to the phase compensation of feedback circuit or feedback system, ensure the stability of system.But because the different communication system that occurs now and detection system all can exist different circuit arrangements, the circuit different for each or system need to arrange phase alignment scheme corresponding with it separately, not only make original circuit more complicated, increase manpower and resources costs, and poor universality, ease for use is also not enough.
Summary of the invention
The technical matters that the present invention mainly solves is to provide a kind of method of phase alignment, device and equipment, under the prerequisite not changing original degeneration factor mentality of designing, the calibration to phase information can be realized, ensure the stability of equipment, and between different systems, there is versatility, ease for use is strong.
For solving the problems of the technologies described above, first aspect present invention provides a kind of method of phase alignment, comprising:
Gather the stability index signal of negative-feedback circuit;
Described stability index signal is detected, and judges whether described negative-feedback circuit is stablized;
When described negative-feedback circuit is unstable, the stable phase angle detecting described negative-feedback circuit is interval, and determines optimum phase according to described stable phase angle interval; And
The phase place of described optimum phase as the input signal of described negative-feedback circuit is inputted.
In conjunction with first aspect, in the first possibility embodiment of first aspect, the stable phase angle of the described negative-feedback circuit of described detection is interval, and determines that the step of optimum phase is specially according to described stable phase angle interval:
The phase place of the input signal of described negative-feedback circuit being scanned in the schedule time, determining that the stable phase angle of described negative-feedback circuit is interval by detecting described stability index signal;
Optimum phase is determined according to described stable phase angle interval.
May embodiment in conjunction with the first of first aspect, may in embodiment at the second of first aspect, describedly determine that the step of optimum phase specifically comprises according to described stable phase angle interval:
The mesophase spherule place value in described stable phase angle interval is defined as optimum phase.
In conjunction with the first possibility embodiment of first aspect, in the third possibility embodiment of first aspect, the described phase place by the input signal of described negative-feedback circuit scanned in the schedule time, determined that the step in the stable phase angle interval of described negative-feedback circuit specifically comprises by detecting described stability index signal:
The phase place of the input signal of described negative-feedback circuit being scanned from 0 degree to 360 degree in the schedule time, determining that the stable phase angle of described negative-feedback circuit is interval by detecting described stability index signal.
In conjunction with the first possibility embodiment of first aspect, in the 4th kind of possibility embodiment of first aspect, the described phase place by the input signal of described negative-feedback circuit scanned in the schedule time, determined that the step in the stable phase angle interval of described negative-feedback circuit specifically comprises by detecting described stability index signal:
The phase place of the input signal of described negative-feedback circuit was scanned from 0 degree to 360 degree in the schedule time, after described stable phase angle interval being detected, stops scanning the interval follow-up phase place of described stable phase angle.
For solving the problems of the technologies described above, second aspect present invention provides a kind of device of phase alignment, comprising: collecting unit, stable detection unit, stable phase angle determining unit and phasing unit,
Described collecting unit is for gathering the stability index signal of negative-feedback circuit;
Described stable detection unit is used for detecting described stability index signal, and judges whether described negative-feedback circuit is stablized;
Described stable phase angle determining unit is used for when described negative-feedback circuit is unstable, and the stable phase angle detecting described negative-feedback circuit is interval, and determines optimum phase according to described stable phase angle interval;
Described phasing unit is used for the phase place of described optimum phase as the input signal of described negative-feedback circuit to input.
For solving the problems of the technologies described above, third aspect present invention provides a kind of equipment of phase alignment, comprises processor and storer,
Described processor is used for, and gathering stability index signal in negative-feedback circuit, determining whether described negative-feedback circuit is stablized by carrying out detection to described stability index signal; When determining that described negative-feedback circuit is unstable, the stable phase angle detecting described negative-feedback circuit is interval, determines optimum phase according to described stable phase angle interval; And the phase place of described optimum phase as the input signal of described negative-feedback circuit is inputted;
Described storer is used for, and stores the data produced in the program and described program operation process run in described processor.
In conjunction with the third aspect, in the first possibility embodiment of the third aspect, described processor scans in the schedule time specifically for the phase place of the input signal by described negative-feedback circuit, determines that the stable phase angle of described negative-feedback circuit is interval by detecting described stability index signal;
Optimum phase is determined according to described stable phase angle interval.
In conjunction with the first possibility embodiment of the third aspect, in the second possibility embodiment of the third aspect, described processor is specifically for being defined as optimum phase by the mesophase spherule place value in described stable phase angle interval.
In conjunction with the first possibility embodiment of the third aspect, in the third possibility embodiment of the third aspect, described processor scans from 0 degree to 360 degree in the schedule time specifically for the phase place of the input signal by described negative-feedback circuit, determines that the stable phase angle of described negative-feedback circuit is interval by detecting described stability index signal.
In conjunction with the first possibility embodiment of the third aspect, in the 4th kind of possibility embodiment of the third aspect, described processor scans from 0 degree to 360 degree in the schedule time specifically for the phase place of the input signal by described negative-feedback circuit, after described stable phase angle interval being detected, stop scanning the interval follow-up phase place of described stable phase angle.
The invention has the beneficial effects as follows: the situation being different from prior art, the present invention is after collecting the stability index signal of negative-feedback circuit, stability index signal is detected, judge whether negative-feedback circuit is stablized, and when determining that negative-feedback circuit is unstable, the stable phase angle detecting negative-feedback circuit is interval, after determining optimum phase, the phase place of optimum phase as the input signal of negative-feedback circuit is inputted according to stable phase angle interval.By the way, under the prerequisite not changing original degeneration factor mentality of designing, the calibration to phase information can be realized, ensure the stability of equipment, and the scope of application not limit, and can see easy-to-use at different equipment and device, have good versatility.And the inventive method itself is easy, realizability is strong, has stronger practicality.
Accompanying drawing explanation
Fig. 1 is the structural representation of prior art phase alignment system of the present invention;
Fig. 2 is the structural representation of system one embodiment of phase alignment of the present invention;
Fig. 3 is the schematic flow sheet of method one embodiment of phase alignment of the present invention;
Fig. 4 is the schematic flow sheet of another embodiment of method of phase alignment of the present invention;
Fig. 5 is the structural representation of Fig. 3 phase alignment one embody rule embodiment;
Fig. 6 is the structural representation of device one embodiment of phase alignment of the present invention;
Fig. 7 is the structural representation of equipment one embodiment of phase alignment of the present invention.
Embodiment
Consult Fig. 2, Fig. 2 is the structural representation of phase alignment system one embodiment of the present invention.The phase alignment system of present embodiment comprises negative-feedback circuit 201 and phase alignment equipment 202.Wherein, the phase alignment system of present embodiment is applicable to the degeneration factor that closes.And be applicable to any device and the equipment that comprise degeneration factor.
Negative-feedback circuit 201 comprises negative feedback unit 2011 and Energy Coupling unit 2022.Wherein, negative feedback unit 2011 is generally the system of relative information sensitivity, in the present embodiment, is the effective object of phase alignment.The output signal of closed degeneration factor is partly coupled in negative feedback unit 2010 by Energy Coupling unit 2022, jointly forms closed feedback loop circuit with negative feedback unit 2011.
Phase alignment equipment 202 is for gathering the stability index signal of negative-feedback circuit 201, judge whether negative-feedback circuit 201 is stablized according to stability index signal, when phase alignment equipment 202 determines that negative-feedback circuit 201 is unstable, stability index signal is gathered and to detect the stable phase angle of negative-feedback circuit according to aforementioned stable interval while phase place by adjustment negative-feedback circuit 201 input signal, determining optimum phase according to stable phase angle interval, the phase place of optimum phase as the input signal of negative-feedback circuit is inputted.Ensure the stable output of negative-feedback circuit 201.
Particularly, refer to Fig. 3, Fig. 3 is the schematic flow sheet of method one embodiment of phase alignment of the present invention.The method of the phase alignment of present embodiment comprises the steps:
301: the stability index signal gathering negative-feedback circuit.
In order to ensure that the loop of the degeneration factor closed is in normal duty, need to differentiate the stability of negative-feedback circuit.Particularly, the collection that the equipment of phase alignment is real-time can characterize the stability index signal whether negative-feedback circuit is in steady state (SS).
General can embody the index whether closed negative-feedback circuit be in steady state (SS) and have a lot, such as when negative-feedback circuit plays pendulum, there will be the band external expansion of signal, therefore by the amplitude gathering out-of-band-signal, the equipment of phase alignment determines whether negative-feedback circuit is stablized.In addition, when there is non-steady state in some negative-feedback circuits, because deviation appears in phase information, signal transmission generation loss, there will be the distortion of signal, by the impact of negative-feedback circuit instability, the power supply situation of negative-feedback circuit changes, therefore, the equipment of phase alignment or can also detect the supply current of negative-feedback circuit or the change of voltage and judges whether negative-feedback circuit is stablized by the distortion degree of collection signal.In other embodiments, also comprise other stable phase angle indexs, do not limit at this.
302: described stability index signal is detected and judges whether described negative-feedback circuit is stablized.
The equipment of phase alignment, after collecting stability index signal, in order to determine whether current negative-feedback circuit is stablized, being further advanced by and detecting stability index signal, judges whether negative-feedback circuit is in steady state (SS).As judged, whether signal there is band external expansion, and whether amplitude whether stable, signal occurs that whether distortion, supply current and voltage is normal etc., do not repeat them here.
303: when described negative-feedback circuit is unstable, the stable phase angle detecting described negative-feedback circuit is interval, and determines optimum phase according to described stable phase angle interval.
By the detection to stability index signal, if the display of current steady index signal is normal, namely negative-feedback circuit is in steady state (SS), and the equipment of phase-detection does not change the current input phase of negative-feedback circuit.
If current negative-feedback circuit plays pendulum, the phase place of the input signal of negative-feedback circuit scans from 0 degree to 360 degree in the schedule time by the equipment of phase alignment, stability index signal is detected while scan input signal, known by detecting stability index signal, in the phase place of input signal from 0 degree to 360 degree scanning process, negative-feedback circuit also switches between steady state (SS) and non-steady state, determines that the stable phase angle that negative-feedback circuit is corresponding when being in steady state (SS) is interval further.Wherein, finding through repeated detection, is that continuous print is interval between aforementioned stable phase region.Concrete reason is as follows:
Due to, for a negative-feedback circuit, negative-feedback circuit whether stablize the gain margin and phase margin that generally depend on circuit, if the gain margin of negative-feedback circuit is fixed, so whether stablizing of negative-feedback circuit is determined by phase margin.From the angle of mathematics, above-mentioned principle is made an explanation below.
Suppose that the gain margin of negative-feedback circuit is Q, then the absolute value meeting the difference of P and P0 between the phase value P of the real input signal of negative-feedback circuit and optimum phase P0 is less than Q, shown in following relational expression:
|P-P0|<Q；
I.e. (P0-Q) <P< (P0+Q).
As from the foregoing, the phase place P of the input signal of negative-feedback circuit is stable in interval [P0-Q, P0+Q], and namely stable phase angle interval is continuous print interval [P0-Q, P0+Q].
Although, negative-feedback circuit all can show comparatively stable state in whole stable phase angle interval, but find in the detection, an optimum phase corresponding with least error is there will be in stable phase angle interval, particularly, in present embodiment, adopt average mode, the mesophase spherule place value defining described stable phase angle interval is optimum phase:
[(P0-Q)+(P0+Q)]/2＝P0。
In the present embodiment, the equipment of phase alignment is real-time detecting the stability of negative-feedback circuit.But, sometimes stable phase angle interval not all appears at the position of 360 degree, in order to save sweep time, also for the ease of reducing to greatest extent in phase calibration process the impact that equipment normally works, in another embodiment, the phase place of the input signal of negative-feedback circuit was scanned from 0 degree to 360 degree in the schedule time, after the stable phase angle interval of negative-feedback circuit being detected, stop the scanning to the phase place behind stable phase angle interval, and without the need to 360 degree must be scanned up to from 0 degree, to save time and the processor resource of negative-feedback circuit.Specific works flow process figure, as shown in Figure 4.
304: the phase place of described optimum phase as the input signal of described negative-feedback circuit is inputted.
The equipment of phase alignment, after obtaining the optimum phase of negative-feedback circuit, is calibrated the input signal of negative-feedback circuit, the phase place of above-mentioned optimum phase as the input signal of negative-feedback circuit is inputted.
For example, consult Fig. 5, Fig. 5 is the structural representation of phase alignment one embody rule embodiment.
As shown in Figure 5, Fig. 5 is an emission coefficient with negative-feedback circuit, comprises the negative-feedback circuit 501, phase alignment equipment 502 and the emitting antenna 503 that are made up of components and parts all in dotted line frame.
When emission coefficient is in closed-loop working state, ambient controller is as after DSP carries out tax phase value by the phase shifter element 5011 of PV to negative-feedback circuit 501, emission coefficient can work for input phase controls negative-feedback circuit 501 with this phase value, phase alignment equipment 502 gather negative-feedback circuit 501 export feedback signal I and feedback signal Q as determining whether current negative-feedback circuit 501 is in the stability index signal of steady-working state, as judged whether feedback signal I and feedback signal Q and input signal I and input signal Q exists predetermined phase relation etc. by detecting, do not limit at this.If phase alignment equipment 502 is through detecting, determine that current negative-feedback circuit 501 is in non-stable duty, emission coefficient is scanned from 0 degree to 360 degree the input phase of phase shifter element 5011 by PV, and while scanning, gather feedback signal I and the feedback signal Q of feedback circuit 501 output.By observe input phase value with the corresponding relation of stability index signal, determine that the stable phase angle of the negative-feedback circuit 501 of emission coefficient is interval, and determine the optimum phase of negative-feedback circuit 501 according to stable phase angle interval.Such as, [0,360] within the scope of degree, find that in the interval that the input phase of phase shifter element 5011 is spent in [120,200], negative-feedback circuit 501 is in steady-working state, so just determine interval [120,200] degree is the stable phase angle interval of emission coefficient, and from (120+200)/2=160 degree, optimum phase is 160 degree.Then, input with 160 degree of optimum phases for negative-feedback circuit 501, launched by transmitter 503 after ovennodulation is amplified at input signal I and input signal Q.
Be different from prior art, the phase alignment equipment of present embodiment is after collecting the stability index signal of negative-feedback circuit, stability index signal is detected, to judge whether negative-feedback circuit is stablized, and when determining that negative-feedback circuit is unstable, the stable phase angle detecting negative-feedback circuit is interval, after determining optimum phase, the phase place of optimum phase as the input signal of negative-feedback circuit is inputted according to stable phase angle interval.By the way, under the prerequisite not changing original degeneration factor mentality of designing, the calibration to phase information can be realized, ensure the stability of equipment, and the scope of application not limit, and can see easy-to-use at different equipment and device, have good versatility.And the inventive method itself is easy, realizability is strong, has stronger practicality.
Consult Fig. 6, Fig. 6 is the structural representation of device one embodiment of phase alignment of the present invention.As shown in Figure 6, the device of the phase alignment of present embodiment comprises: collecting unit 601, stable detection unit 602, stable phase angle determining unit 603 and phasing unit 604.
Wherein, collecting unit 601 is for gathering the stability index signal of negative-feedback circuit.
In order to ensure that the loop of the degeneration factor closed is in normal duty, need to differentiate the stability of negative-feedback circuit.Particularly, collecting unit 601 gathers in real time and can characterize the stability index signal whether negative-feedback circuit is in steady state (SS).
General can embody the index whether closed negative-feedback circuit be in steady state (SS) and have a lot, such as when negative-feedback circuit plays pendulum, there will be the band external expansion of signal, therefore by the amplitude gathering out-of-band-signal, the equipment of phase alignment determines whether negative-feedback circuit is stablized.In addition, when there is non-steady state in some negative-feedback circuits, because deviation appears in phase information, signal transmission generation loss, there will be the distortion of signal, by the impact of negative-feedback circuit instability, the power supply situation of negative-feedback circuit changes, therefore, collecting unit 601 or can also detect the supply current of negative-feedback circuit or the change of voltage and judges whether negative-feedback circuit is stablized by the distortion degree of collection signal.In other embodiments, also comprise other stable phase angle indexs, do not limit at this.
Stable detection unit 602 for detecting described stability index signal, and judges whether described negative-feedback circuit is stablized.
Collecting unit 601, after collecting stability index signal, in order to determine whether current negative-feedback circuit is stablized, being further advanced by and detecting stability index signal, judges whether negative-feedback circuit is in steady state (SS).As judged, whether signal there is band external expansion, and whether amplitude whether stable, signal occurs that whether distortion, supply current and voltage is normal etc., do not repeat them here.
Stable phase angle determining unit 603 is for when described negative-feedback circuit is unstable, and the stable phase angle detecting described negative-feedback circuit is interval, and determines optimum phase according to described stable phase angle interval.
By the detection of stable phase angle determining unit 603 pairs of stability index signals, determine, if the display of current steady index signal is normal, namely negative-feedback circuit is in steady state (SS), and the device of phase-detection does not change the current input phase of negative-feedback circuit.
If current negative-feedback circuit plays pendulum, the phase place of the input signal of negative-feedback circuit scans from 0 degree to 360 degree in the schedule time by stable phase angle determining unit 603, stability index signal is detected while scan input signal, known by detecting stability index signal, in the phase place of input signal from 0 degree to 360 degree scanning process, negative-feedback circuit also switches between steady state (SS) and non-steady state, and stable phase angle determining unit 603 determines that the stable phase angle that negative-feedback circuit is corresponding when being in steady state (SS) is interval further.Wherein, finding through repeated detection, is that continuous print is interval between aforementioned stable phase region.Concrete reason is as follows:
Due to, for a negative-feedback circuit, negative-feedback circuit whether stablize the gain margin and phase margin that generally depend on circuit, if the gain margin of negative-feedback circuit is fixed, so whether stablizing of negative-feedback circuit is determined by phase margin.From the angle of mathematics, above-mentioned principle is made an explanation below.
Suppose that the gain margin of negative-feedback circuit is Q, then the absolute value meeting the difference of P and P0 between the phase value P of the real input signal of negative-feedback circuit and optimum phase P0 is less than Q, shown in following relational expression:
|P-P0|<Q；
I.e. (P0-Q) <P< (P0+Q).
As from the foregoing, the phase place P of the input signal of negative-feedback circuit is stable in interval [P0-Q, P0+Q], and namely stable phase angle interval is continuous print interval [P0-Q, P0+Q].
Although, negative-feedback circuit all can show comparatively stable state in whole stable phase angle interval, but find in the detection, an optimum phase corresponding with least error is there will be in stable phase angle interval, particularly, in present embodiment, adopt average mode, the mesophase spherule place value defining described stable phase angle interval is optimum phase:
[(P0-Q)+(P0+Q)]/2＝P0。
In the present embodiment, stable detection unit 602 is real-time detecting the stability of negative-feedback circuit.But, sometimes stable phase angle interval not all appears at the position of 360 degree, in order to save sweep time, also for the ease of reducing to greatest extent in phase calibration process the impact that equipment normally works, in another embodiment, the phase place of the input signal of negative-feedback circuit was scanned from 0 degree to 360 degree in the schedule time, after the stable phase angle interval of negative-feedback circuit being detected, stop the scanning to the phase place behind stable phase angle interval, and without the need to 360 degree must be scanned up to from 0 degree, to save time and the processor resource of negative-feedback circuit.
Phasing unit 604 is for inputting the phase place of described optimum phase as the input signal of described negative-feedback circuit.
Phasing unit 604, after obtaining the optimum phase of negative-feedback circuit, is calibrated the input signal of negative-feedback circuit, the phase place of above-mentioned optimum phase as the input signal of negative-feedback circuit is inputted.
Be different from prior art, the collecting unit of the device of the phase alignment of present embodiment is after collecting the stability index signal of negative-feedback circuit, stable detection unit detects stability index signal, to judge whether negative-feedback circuit is stablized, stable phase angle determining unit is when stable detection unit determination negative-feedback circuit is unstable, the stable phase angle detecting negative-feedback circuit is interval, and determine optimum phase according to stable phase angle interval, the phase place of optimum phase as the input signal of negative-feedback circuit inputs by phasing unit.By the way, under the prerequisite not changing original degeneration factor mentality of designing, the calibration to phase information can be realized, ensure the stability of equipment, and the scope of application not limit, and can see easy-to-use at different equipment and device, have good versatility.And this body structure of the present invention is simple, realizability is strong, has stronger practicality.
Consult Fig. 7, Fig. 7 is the structural representation of equipment one embodiment of phase alignment of the present invention.The equipment of the phase alignment of present embodiment comprises processor 701 and storer 702,
Processor 701 and storer 702 are coupled by bus 703, and wherein bus 903 is except comprising data bus, can also comprise power bus, control bus and status signal bus in addition etc.But for the purpose of clearly demonstrating, in the drawings various bus is all designated as bus 703.
By carrying out detection to described stability index signal, processor 701, for gathering stability index signal in negative-feedback circuit, determines whether described negative-feedback circuit is stablized; When determining that described negative-feedback circuit is unstable, the stable phase angle detecting described negative-feedback circuit is interval, determines optimum phase according to described stable phase angle interval; And the phase place of described optimum phase as the input signal of described negative-feedback circuit is inputted.
Particularly, in order to ensure that the loop of the degeneration factor closed is in normal duty, need to differentiate the stability of negative-feedback circuit.Processor 701 gathers in real time and can characterize the stability index signal whether negative-feedback circuit is in steady state (SS).
Generally can embody the index whether closed negative-feedback circuit be in steady state (SS) has a lot, such as when negative-feedback circuit plays pendulum, there will be the band external expansion of signal, therefore by the amplitude gathering out-of-band-signal, the equipment of phase alignment determines whether negative-feedback circuit is stablized.In addition, when there is non-steady state in some negative-feedback circuits, because deviation appears in phase information, signal transmission generation loss, there will be the distortion of signal, by the impact of negative-feedback circuit instability, the power supply situation of negative-feedback circuit changes, therefore, processor 701 or can also detect the supply current of negative-feedback circuit or the change of voltage and judges whether negative-feedback circuit is stablized by the distortion degree of collection signal.In other embodiments, also comprise other stable phase angle indexs, do not limit at this.
Processor 701, after collecting stability index signal, in order to determine whether current negative-feedback circuit is stablized, being further advanced by and detecting stability index signal, judges whether negative-feedback circuit is in steady state (SS).As judged, whether signal there is band external expansion, and whether amplitude whether stable, signal occurs that whether distortion, supply current and voltage is normal etc., do not repeat them here.
Processor 701, by the detection to stability index signal, is determined, if the display of current steady index signal is normal, namely negative-feedback circuit is in steady state (SS), and the device of phase-detection does not change the current input phase of negative-feedback circuit.
If current negative-feedback circuit plays pendulum, the phase place of the input signal of negative-feedback circuit scans from 0 degree to 360 degree in the schedule time by processor 701, stability index signal is detected while scan input signal, known by detecting stability index signal, in the phase place of input signal from 0 degree to 360 degree scanning process, negative-feedback circuit also switches between steady state (SS) and non-steady state, and stable phase angle determining unit 603 determines that the stable phase angle that negative-feedback circuit is corresponding when being in steady state (SS) is interval further.Wherein, finding through repeated detection, is that continuous print is interval between aforementioned stable phase region.Concrete reason is as follows:
Due to, for a negative-feedback circuit, negative-feedback circuit whether stablize the gain margin and phase margin that generally depend on circuit, if the gain margin of negative-feedback circuit is fixed, so whether stablizing of negative-feedback circuit is determined by phase margin.From the angle of mathematics, above-mentioned principle is made an explanation below.
Suppose that the gain margin of negative-feedback circuit is Q, then the absolute value meeting the difference of P and P0 between the phase value P of the real input signal of negative-feedback circuit and optimum phase P0 is less than Q, shown in following relational expression:
|P-P0|<Q；
I.e. (P0-Q) <P< (P0+Q).
As from the foregoing, the phase place P of the input signal of negative-feedback circuit is stable in interval [P0-Q, P0+Q], and namely stable phase angle interval is continuous print interval [P0-Q, P0+Q].
Although, negative-feedback circuit all can show comparatively stable state in whole stable phase angle interval, but find in the detection, an optimum phase corresponding with least error is there will be in stable phase angle interval, particularly, in present embodiment, adopt average mode, the mesophase spherule place value defining described stable phase angle interval is optimum phase:
[(P0-Q)+(P0+Q)]/2＝P0。
In the present embodiment, processor 701 is real-time detecting the stability of negative-feedback circuit.But, sometimes stable phase angle interval not all appears at the position of 360 degree, in order to save sweep time, also for the ease of reducing to greatest extent in phase calibration process the impact that equipment normally works, in another embodiment, the phase place of the input signal of negative-feedback circuit was scanned from 0 degree to 360 degree in the schedule time, after the stable phase angle interval of negative-feedback circuit being detected, stop the scanning to the phase place behind stable phase angle interval, and without the need to 360 degree must be scanned up to from 0 degree, to save time and the processor resource of negative-feedback circuit.
Processor 701, after obtaining the optimum phase of negative-feedback circuit, is calibrated the input signal of negative-feedback circuit, the phase place of above-mentioned optimum phase as the input signal of negative-feedback circuit is inputted.
Storer 702 is for storing the data produced in the program and described program operation process run in described processor.ROM (read-only memory) and random access memory can be comprised, and provide instruction and data to processor 701.A part for storer 702 can also comprise nonvolatile RAM (NVRAM).
Storer 702 stores following element, can performance element or data structure, or their subset, or their superset:
Operational order: comprise various operational order, for realizing various operation.
Operating system: comprise various system program, for realizing various basic business and processing hardware based task.
In embodiments of the present invention, the operational order (this operational order can store in an operating system) that processor 701 stores by calling storer 702, performs aforesaid operations.
Processor 701 can also be called CPU (CentralProcessingUnit, CPU (central processing unit)).Storer 702 can comprise ROM (read-only memory) and random access memory, and provides instruction and data to processor 901.A part for storer 702 can also comprise nonvolatile RAM (NVRAM).
The method that the invention described above embodiment discloses can be applied in processor 701, or is realized by processor 701.Processor 701 may be a kind of integrated circuit (IC) chip, has the processing power of signal.In implementation procedure, each step of said method can be completed by the instruction of the integrated logic circuit of the hardware in processor 701 or software form.Above-mentioned processor 701 can be general processor, digital signal processor (DSP), special IC (ASIC), ready-made programmable gate array (FPGA) or other programmable logic device (PLD), discrete gate or transistor logic, discrete hardware components.Can realize or perform disclosed each method, step and the logic diagram in the embodiment of the present invention.The processor etc. of general processor can be microprocessor or this processor also can be any routine.Step in conjunction with the method disclosed in the embodiment of the present invention directly can be presented as that hardware decoding processor is complete, or combines complete with the hardware in decoding processor and software unit.Software unit can be positioned at random access memory, flash memory, ROM (read-only memory), in the storage medium of this area maturations such as programmable read only memory or electrically erasable programmable storer, register.This storage medium is positioned at storer 702, and processor 701 reads the information in storer 702, completes the step of said method in conjunction with its hardware.
Be different from prior art, the processor of the equipment of the phase alignment of present embodiment is after collecting the stability index signal of negative-feedback circuit, stability index signal is detected, to judge whether negative-feedback circuit is stablized, when determining that negative-feedback circuit is unstable, the stable phase angle detecting negative-feedback circuit is interval, and determines optimum phase according to stable phase angle interval, and the phase place of optimum phase as the input signal of negative-feedback circuit is inputted.By the way, under the prerequisite not changing original degeneration factor mentality of designing, the calibration to phase information can be realized, ensure the stability of equipment, and the scope of application not limit, and can see easy-to-use at different equipment and device, have good versatility.And this body structure of the present invention is simple, realizability is strong, has stronger practicality.
The foregoing is only embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize instructions of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (11)
1. a method for phase alignment, is characterized in that, comprising:
Gather the stability index signal of negative-feedback circuit;
Described stability index signal is detected, and judges whether described negative-feedback circuit is stablized;
When described negative-feedback circuit is unstable, the stable phase angle detecting described negative-feedback circuit is interval, and determines optimum phase according to described stable phase angle interval; And
The phase place of described optimum phase as the input signal of described negative-feedback circuit is inputted.
2. method according to claim 1, is characterized in that, the stable phase angle of the described negative-feedback circuit of described detection is interval, and determines that the step of optimum phase comprises according to described stable phase angle interval:
The phase place of the input signal of described negative-feedback circuit being scanned in the schedule time, determining that the stable phase angle of described negative-feedback circuit is interval by detecting described stability index signal;
Optimum phase is determined according to described stable phase angle interval.
3. method according to claim 2, is characterized in that, describedly determines that the step of optimum phase comprises according to described stable phase angle interval:
The mesophase spherule place value in described stable phase angle interval is defined as optimum phase.
4. method according to claim 2, it is characterized in that, the described phase place by the input signal of described negative-feedback circuit scanned in the schedule time, determined that the step in the stable phase angle interval of described negative-feedback circuit comprises by detecting described stability index signal:
The phase place of the input signal of described negative-feedback circuit being scanned from 0 degree to 360 degree in the schedule time, determining that the stable phase angle of described negative-feedback circuit is interval by detecting described stability index signal.
5. method according to claim 2, it is characterized in that, the described phase place by the input signal of described negative-feedback circuit scanned in the schedule time, determined that the step in the stable phase angle interval of described negative-feedback circuit comprises by detecting described stability index signal:
The phase place of the input signal of described negative-feedback circuit was scanned from 0 degree to 360 degree in the schedule time, after described stable phase angle interval being detected, stops scanning the interval follow-up phase place of described stable phase angle.
6. a device for phase alignment, is characterized in that, comprising: collecting unit, stable detection unit, stable phase angle determining unit and phasing unit,
Described collecting unit is for gathering the stability index signal of negative-feedback circuit;
Described stable detection unit is used for detecting described stability index signal, and judges whether described negative-feedback circuit is stablized;
Described stable phase angle determining unit is used for when described negative-feedback circuit is unstable, and the stable phase angle detecting described negative-feedback circuit is interval, and determines optimum phase according to described stable phase angle interval;
Described phasing unit is used for the phase place of described optimum phase as the input signal of described negative-feedback circuit to input.
7. an equipment for phase alignment, is characterized in that, comprises processor and storer,
Described processor is used for, and gathering stability index signal in negative-feedback circuit, determining whether described negative-feedback circuit is stablized by carrying out detection to described stability index signal; When determining that described negative-feedback circuit is unstable, the stable phase angle detecting described negative-feedback circuit is interval, determines optimum phase according to described stable phase angle interval; And the phase place of described optimum phase as the input signal of described negative-feedback circuit is inputted;
Described storer is used for, and stores the data produced in the program and described program operation process run in described processor.
8. equipment according to claim 7, it is characterized in that, described processor scans in the schedule time specifically for the phase place of the input signal by described negative-feedback circuit, determines that the stable phase angle of described negative-feedback circuit is interval by detecting described stability index signal;
Optimum phase is determined according to described stable phase angle interval.
9. equipment according to claim 8, is characterized in that, described processor is specifically for being defined as optimum phase by the mesophase spherule place value in described stable phase angle interval.
10. equipment according to claim 8, it is characterized in that, described processor scans from 0 degree to 360 degree in the schedule time specifically for the phase place of the input signal by described negative-feedback circuit, determines that the stable phase angle of described negative-feedback circuit is interval by detecting described stability index signal.
11. equipment according to claim 8, it is characterized in that, described processor scans from 0 degree to 360 degree in the schedule time specifically for the phase place of the input signal by described negative-feedback circuit, after described stable phase angle interval being detected, stop scanning the interval follow-up phase place of described stable phase angle.
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