CN105335974B - The method and apparatus of phase alignment - Google Patents
The method and apparatus of phase alignment Download PDFInfo
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- CN105335974B CN105335974B CN201510685238.7A CN201510685238A CN105335974B CN 105335974 B CN105335974 B CN 105335974B CN 201510685238 A CN201510685238 A CN 201510685238A CN 105335974 B CN105335974 B CN 105335974B
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Abstract
The invention discloses a kind of method, apparatus of phase alignment and equipment, the method for the phase alignment includes：Acquire the stability index signal of negative-feedback circuit；The stability index signal is detected, and judges whether the negative-feedback circuit is stablized；When the negative-feedback circuit is unstable, the stable phase angle section of the negative-feedback circuit is detected, and optimum phase is determined according to the stable phase angle section；And it is inputted the optimum phase as the phase of the input signal of the negative-feedback circuit.By the above-mentioned means, the present invention can realize the calibration to phase information under the premise of not changing original degeneration factor mentality of designing, ensures the stability of equipment, and there is versatility between different systems, be easily used.
Description
Technical field
The present invention relates to control fields, more particularly to a kind of method and apparatus of phase alignment.
Background technology
Along with the continuous development of the communication technology and observation and control technology, various measuring and controlling equipments, communication equipment are to the precision of equipment
It is required that it is also higher and higher, but since signal is in acquisition or transmission process, presence signal that generally all can be more or less is lost,
There is phase offset, in order to ensure that the stability of signal transmission, more and more equipment can carry out the accurate control of phase information
System, for example, by degeneration factor equipment or increasing negative-feedback circuit come to realizing the calibration to phase.
As shown in FIG. 1, FIG. 1 is the structural schematic diagrams of degeneration factor in the prior art.Reponse system includes input
Signal A, output signal B and feedback signal C, in order to ensure the validity and job stability of degeneration factor, then feeding back
The phase value of signal C must keep 180 difference with the phase value of input signal A.But due to the presence of loss of signal, generally
In the case of the phase value of feedback signal C and the difference of phase value of input signal A generally will not all be maintained at 180 degree, further
The stability of influence system.
To solve the above-mentioned problems, the prior art be usually used inside the feedback circuit or reponse system inside come into
The detection of row phase information is screened, and further according to the phase detected inside feedback circuit or inside reponse system
Deviation compensates, and corrects.By the above method, although being capable of a degree of phase realized to feedback circuit or reponse system
Position compensation, ensures the stability of system.But since the different communication systems and detecting system occurred now can all exist
Different circuit arrangements for each different circuit or system is required for that corresponding phase alignment side is separately provided
Case not only makes original circuit more complicate, and increases manpower and resources costs, and poor universality, ease for use are also insufficient.
Invention content
The invention mainly solves the technical problem of providing a kind of method equipment of phase alignment, can not change it is original
Under the premise of degeneration factor mentality of designing, realizes the calibration to phase information, ensure the stability of equipment, and be in different
There is versatility between system, be easily used.
In order to solve the above technical problems, first aspect present invention provides a kind of method of phase alignment, including：
Acquire the stability index signal of negative-feedback circuit；
The stability index signal is detected, and judges whether the negative-feedback circuit is stablized；
When the negative-feedback circuit is unstable, by the phase of the input signal of the negative-feedback circuit the predetermined time into
Row scanning determines the stable phase angle section of the negative-feedback circuit by detecting the stability index signal, and according to described steady
Phase bit section determines optimum phase；And
It is inputted the optimum phase as the phase of the input signal of the negative-feedback circuit.
The first possible embodiment with reference to first aspect, in second of possible embodiment of first aspect, institute
The step of determining optimum phase according to the stable phase angle section is stated to specifically include：
The interphase place value in the stable phase angle section is determined as optimum phase.
The first possible embodiment with reference to first aspect, in the third possible embodiment of first aspect, institute
It states and is scanned the phase of the input signal of the negative-feedback circuit in the predetermined time, by detecting the stability index signal
The step of stable phase angle section for determining the negative-feedback circuit, specifically includes：
The phase of the input signal of the negative-feedback circuit degree is scanned in the predetermined time from 0 degree to 360, inspection is passed through
Survey the stable phase angle section that the stability index signal determines the negative-feedback circuit.
The first possible embodiment with reference to first aspect, in the 4th kind of possible embodiment of first aspect, institute
It states and is scanned the phase of the input signal of the negative-feedback circuit in the predetermined time, by detecting the stability index signal
The step of stable phase angle section for determining the negative-feedback circuit, specifically includes：
The phase of the input signal of the negative-feedback circuit degree is scanned in the predetermined time from 0 degree to 360, until detection
To after the stable phase angle section, stopping is scanned the subsequent phase in stable phase angle section.
In order to solve the above technical problems, second aspect of the present invention provides a kind of equipment of phase alignment, including processor with
Memory,
The processor is used for, acquire negative-feedback circuit in stability index signal, by the stability index signal into
Row detection determines whether the negative-feedback circuit is stablized；When determining that the negative-feedback circuit is unstable, by negative-feedback electricity
The phase of the input signal on road is scanned in the predetermined time, and the negative-feedback electricity is determined by detecting the stability index signal
The stable phase angle section on road determines optimum phase according to the stable phase angle section；And using the optimum phase as described negative
The phase of the input signal of feedback circuit is inputted；
The memory is used for, and is stored the program run in the processor and is generated in described program operational process
Data.
In conjunction with second aspect, in the first possible embodiment of second aspect, the processor is specifically used for institute
The interphase place value for stating stable phase angle section is determined as optimum phase.
In conjunction with second aspect, in second of possible embodiment of second aspect, the processor is specifically used for institute
It states the phase of the input signal of negative-feedback circuit degree to be scanned from 0 degree to 360 in the predetermined time, be referred to by detecting the stabilization
Mark signal determines the stable phase angle section of the negative-feedback circuit.
In conjunction with second aspect, in the third possible embodiment of second aspect, the processor is specifically used for institute
It states the phase of the input signal of negative-feedback circuit degree to be scanned from 0 degree to 360 in the predetermined time, until detecting the stable phase
Behind the section of position, stopping is scanned the subsequent phase in stable phase angle section.
The beneficial effects of the invention are as follows：The case where being different from the prior art, the present invention are collecting the steady of negative-feedback circuit
After determining index signal, stability index signal is detected, judges whether negative-feedback circuit is stablized, and is determining negative-feedback circuit
When unstable, the stable phase angle section of negative-feedback circuit is detected, after determining optimum phase according to stable phase angle section, by best phase
Position is inputted as the phase of the input signal of negative-feedback circuit.By the above-mentioned means, original negative-feedback can not changed
Under the premise of thought of design, realizes the calibration to phase information, ensures the stability of equipment, and the scope of application does not limit,
It can see with device in different equipment easy-to-use, there is preferable versatility.And the method for the present invention simplicity itself is, it can be achieved that property
By force, there is stronger practicability.
Description of the drawings
Fig. 1 is the structural schematic diagram of prior art phase alignment system of the present invention；
Fig. 2 is the structural schematic diagram of one embodiment of system of phase alignment of the present invention；
Fig. 3 is the flow diagram of one embodiment of method of phase alignment of the present invention；
Fig. 4 is the flow diagram of another embodiment of method of phase alignment of the present invention；
Fig. 5 is the structural schematic diagram of one concrete application embodiment of Fig. 3 phase alignments；
Fig. 6 is the structural schematic diagram of one embodiment of device of phase alignment of the present invention；
Fig. 7 is the structural schematic diagram of one embodiment of equipment of phase alignment of the present invention.
Specific implementation mode
Referring to Fig.2, Fig. 2 is the structural schematic diagram of one embodiment of phase alignment system of the present invention.The phase of present embodiment
Position calibration system includes negative-feedback circuit 201 and phase alignment equipment 202.Wherein, the phase alignment system of present embodiment
Degeneration factor suitable for closure.And it is suitable for any device and equipment comprising degeneration factor.
Negative-feedback circuit 201 includes negative-feedback unit 2011 and energy coupling unit 2022.Wherein, negative-feedback unit
The system of 2011 generally relative information sensitivities is in the present embodiment the effective object of phase alignment.Energy coupling unit
2022 are partly coupled to the output signal of the degeneration factor of closure in negative-feedback unit 2010, total with negative-feedback unit 2011
The feedback loop circuit being closed with composition.
Phase alignment equipment 202 is used to acquire the stability index signal of negative-feedback circuit 201, is sentenced according to stability index signal
Whether disconnected negative-feedback circuit 201 is stablized, when phase alignment equipment 202 determines that negative-feedback circuit 201 is unstable, by adjusting negative
Stability index signal is acquired while the phase of 201 input signal of feedback circuit and negative-feedback circuit is detected according to aforementioned stable
Stable phase angle section is determining optimum phase according to stable phase angle section, believes optimum phase as the input of negative-feedback circuit
Number phase inputted.Ensure negative-feedback circuit 201 stablizes output.
Specifically, referring to Fig. 3, Fig. 3 is the flow diagram of one embodiment of method of phase alignment of the present invention.This reality
The method for applying the phase alignment of mode includes the following steps：
301：Acquire the stability index signal of negative-feedback circuit.
In order to ensure that the loop for the degeneration factor being closed is in normal working condition, need to the steady of negative-feedback circuit
It is qualitative to be differentiated.Specifically, whether the acquisition in real time of the equipment of phase alignment, which can characterize negative-feedback circuit and be in, stablizes shape
The stability index signal of state.
Whether the index in stable state has much the general negative-feedback circuit that can embody closure, such as when negative anti-
When current feed circuit plays pendulum, it may appear that the band external expansion of signal, therefore the equipment of phase alignment can be outer by acquiring band
The amplitude of signal determines whether negative-feedback circuit is stablized.In addition, when unstable state occur in some negative-feedback circuits, due to
There is deviation in phase information, and transmission signal is lost, it may appear that and the distortion of signal is influenced by negative-feedback circuit is unstable,
The power supply situation of negative-feedback circuit changes, and therefore, the equipment of phase alignment can also pass through the distortion degree of acquisition signal
Or the variation of the supply current or voltage of detection negative-feedback circuit judges whether negative-feedback circuit is stablized.In other embodiment
In, further include other stable phase angle indexs, does not limit herein.
302：The stability index signal is detected and judges whether the negative-feedback circuit is stablized.
The equipment of phase alignment is after collecting stability index signal, in order to determine whether current negative-feedback circuit is stablized,
It is further advanced by and stability index signal is detected, to judge whether negative-feedback circuit is in stable state.Such as judge to believe
Number whether there is band external expansion, it is whether normal that whether amplitude is stablized, whether signal distortion, supply current and voltage occurs
Deng details are not described herein.
303：When the negative-feedback circuit is unstable, the stable phase angle section of the negative-feedback circuit is detected, and according to
The stable phase angle section determines optimum phase.
By the detection to stability index signal, if current steady index signal is shown normally, i.e., at negative-feedback circuit
The current input phase of negative-feedback circuit is not changed in the equipment of stable state, phase-detection.
If current negative-feedback circuit plays pendulum, the equipment of phase alignment is by the input signal of negative-feedback circuit
Phase degree be scanned from 0 degree to 360 in the predetermined time, stability index signal is detected while scan input signal, is led to
Detection stability index signal is crossed it is found that during the phase of input signal is from 0 degree to 360 degree of scannings, negative-feedback circuit also exists
Switch between stable state and unstable state, further determines that corresponding stable phase angle when negative-feedback circuit is in stable state
Section.Wherein, it is found by repeated detection, aforementioned stable phase interval is continuous section.Concrete reason is as follows：
Since for a negative-feedback circuit, the stabilization of negative-feedback circuit whether is generally dependent on the gain of circuit
Nargin and phase margin, if the gain margin of negative-feedback circuit is fixed, the stabilization of negative-feedback circuit whether, is abundant by phase
Degree determines.Above-mentioned principle is explained from the angle of mathematics below.
Assuming that the gain margin of negative-feedback circuit is Q, then the phase value P of the real input signal of negative-feedback circuit with it is best
The absolute value of the difference for meeting P and P0 between phase P0 is less than Q, shown in following relational expression：
|P-P0|<Q；
That is (P0-Q)<P<(P0+Q).
From the foregoing, it will be observed that the phase P of the input signal of negative-feedback circuit is stable in section [P0-Q, P0+Q], i.e., surely
Phase bit section is continuous section [P0-Q, P0+Q].
Although negative-feedback circuit can all show relatively stable state in entire stable phase angle section, detecting
Middle discovery will appear an optimum phase corresponding with minimal error, specifically, present embodiment in stable phase angle section
In, by the way of average, the interphase place value for defining the stable phase angle section is optimum phase：
[(P0-Q)+(P0+Q)]/2=P0.
In the present embodiment, the equipment of phase alignment is that the stability in real time to negative-feedback circuit is detected.But
It is that sometimes stable phase angle section is not to appear at 360 degree of position, in order to save sweep time, also for convenient for most
The influence worked normally to equipment in phase calibration process is reduced to limits, in another embodiment, by negative-feedback electricity
The phase of the input signal on road degree is scanned in the predetermined time from 0 degree to 360, in the stable phase angle for detecting negative-feedback circuit
Behind section, stop the scanning to the phase behind stable phase angle section, without having to from 0 degree of scanning to 360 degree, when saving
Between and negative-feedback circuit processor resource.Specific workflow figure, as shown in Figure 4.
304：It is inputted the optimum phase as the phase of the input signal of the negative-feedback circuit.
The equipment of phase alignment carries out the input signal of negative-feedback circuit after obtaining the optimum phase of negative-feedback circuit
Calibration, inputs above-mentioned optimum phase as the phase of the input signal of negative-feedback circuit.
For example, it is the structural schematic diagram of one concrete application embodiment of phase alignment refering to Fig. 5, Fig. 5.
As shown in figure 5, Fig. 5 is an emission system with negative-feedback circuit, including by all component groups in dotted line frame
At negative-feedback circuit 501, phase alignment equipment 502 and transmitting antenna 503.
When emission system is in closed-loop working state, shiftings of the ambient controller such as DSP by PV to negative-feedback circuit 501
After phase device unit 5011 carries out tax phase value, emission system can control 501 work of negative-feedback circuit by input phase of the phase value
Make, it is current negative anti-as determining that phase alignment equipment 502 acquires the feedback signal I that negative-feedback circuit 501 exports and feedback signal Q
Whether current feed circuit 501 is in the stability index signal of steady-working state, such as judges feedback signal I and feedback signal by detection
Q and input signal I and input signal Q is not limited herein with the presence or absence of scheduled phase relation etc..If phase alignment equipment
502, by detection, determine that current negative-feedback circuit 501 is in non-stable working condition, emission system is by PV to phase shifter
The input phase of unit 5011 degree is scanned from 0 degree to 360, and while scanning acquisition feedback circuit 501 export it is anti-
Feedback signal I and feedback signal Q.The correspondence with stability index signal of input phase value is observed by observation, determines transmitting
The stable phase angle section of the negative-feedback circuit 501 of system, and determine according to stable phase angle section the best phase of negative-feedback circuit 501
Position.For example, in [0,360] degree range, the input phase of phase shifter element 5011 is found in the section that [120,200] are spent,
Negative-feedback circuit 501 is in steady-working state, then determining that section [120,200] degree is the stable phase angle area of emission system
Between, by (120+200)/2=160 degree it is found that optimum phase is 160 degree.Then, it is the best of negative-feedback circuit 501 with 160 degree
Phase is inputted, and is launched by transmitter 503 after ovennodulation is amplified in input signal I and input signal Q.
It is different from the prior art, the phase alignment equipment of present embodiment is in the stability index letter for collecting negative-feedback circuit
After number, stability index signal is detected, to judge whether negative-feedback circuit is stablized, and is determining that negative-feedback circuit is unstable
When, detect the stable phase angle section of negative-feedback circuit, after determining optimum phase according to stable phase angle section, using optimum phase as
The phase of the input signal of negative-feedback circuit is inputted.By the above-mentioned means, can be set not changing original degeneration factor
Under the premise of counting thinking, realizes the calibration to phase information, ensure the stability of equipment, and the scope of application does not limit, Neng Gou
Different equipment see with device it is easy-to-use, have preferable versatility.And the method for the present invention itself is easy, it can be achieved that property is strong, has
There is stronger practicability.
It is the structural schematic diagram of one embodiment of device of phase alignment of the present invention refering to Fig. 6, Fig. 6.As shown in fig. 6, this
The device of the phase alignment of embodiment includes：Collecting unit 601, stable detection unit 602, stable phase angle determination unit 603
And phasing unit 604.
Wherein, collecting unit 601 is used to acquire the stability index signal of negative-feedback circuit.
In order to ensure that the loop for the degeneration factor being closed is in normal working condition, need to the steady of negative-feedback circuit
It is qualitative to be differentiated.Specifically, collecting unit 601 acquires in real time can characterize whether negative-feedback circuit is in stable state
Stability index signal.
Whether the index in stable state has much the general negative-feedback circuit that can embody closure, such as when negative anti-
When current feed circuit plays pendulum, it may appear that the band external expansion of signal, therefore the equipment of phase alignment can be outer by acquiring band
The amplitude of signal determines whether negative-feedback circuit is stablized.In addition, when unstable state occur in some negative-feedback circuits, due to
There is deviation in phase information, and transmission signal is lost, it may appear that and the distortion of signal is influenced by negative-feedback circuit is unstable,
The power supply situation of negative-feedback circuit changes, therefore, the distortion degree or inspection that collecting unit 601 can also be by acquisition signal
The variation of the supply current or voltage of negative-feedback circuit is surveyed to judge whether negative-feedback circuit is stablized.In other embodiments,
Further include other stable phase angle indexs, does not limit herein.
Stable detection unit 602 judges that the negative-feedback circuit is for being detected to the stability index signal
No stabilization.
Collecting unit 601 is after collecting stability index signal, in order to determine whether current negative-feedback circuit is stablized, into one
Step ground is by being detected stability index signal, to judge whether negative-feedback circuit is in stable state.Such as judging signal is
It is no band external expansion occur, whether amplitude is stablized, whether signal distortion occurs, whether supply current and voltage normal etc.,
This is repeated no more.
Stable phase angle determination unit 603 is used for when the negative-feedback circuit is unstable, detects the negative-feedback circuit
Stable phase angle section, and optimum phase is determined according to the stable phase angle section.
Detection by stable phase angle determination unit 603 to stability index signal determines, if current steady index signal
Display is normal, i.e., negative-feedback circuit is in stable state, and the device of phase-detection does not change the current the input phase of negative-feedback circuit
Position.
If current negative-feedback circuit plays pendulum, stable phase angle determination unit 603 is by the defeated of negative-feedback circuit
Enter the phase of signal degree to be scanned from 0 degree to 360 in the predetermined time, stability index letter is detected while scan input signal
Number, by detecting stability index signal it is found that during the phase of input signal is from 0 degree to 360 degree of scannings, negative-feedback circuit
Also switch between stable state and unstable state, stable phase angle determination unit 603 further determines that negative-feedback circuit is in
Corresponding stable phase angle section when stable state.Wherein, it is found by repeated detection, aforementioned stable phase interval is continuous area
Between.Concrete reason is as follows：
Since for a negative-feedback circuit, the stabilization of negative-feedback circuit whether is generally dependent on the gain of circuit
Nargin and phase margin, if the gain margin of negative-feedback circuit is fixed, the stabilization of negative-feedback circuit whether, is abundant by phase
Degree determines.Above-mentioned principle is explained from the angle of mathematics below.
Assuming that the gain margin of negative-feedback circuit is Q, then the phase value P of the real input signal of negative-feedback circuit with it is best
The absolute value of the difference for meeting P and P0 between phase P0 is less than Q, shown in following relational expression：
|P-P0|<Q；
That is (P0-Q)<P<(P0+Q).
From the foregoing, it will be observed that the phase P of the input signal of negative-feedback circuit is stable in section [P0-Q, P0+Q], i.e., surely
Phase bit section is continuous section [P0-Q, P0+Q].
Although negative-feedback circuit can all show relatively stable state in entire stable phase angle section, detecting
Middle discovery will appear an optimum phase corresponding with minimal error, specifically, present embodiment in stable phase angle section
In, by the way of average, the interphase place value for defining the stable phase angle section is optimum phase：
[(P0-Q)+(P0+Q)]/2=P0.
In the present embodiment, stable detection unit 602 is that the stability in real time to negative-feedback circuit is detected.But
It is that sometimes stable phase angle section is not to appear at 360 degree of position, in order to save sweep time, also for convenient for most
The influence worked normally to equipment in phase calibration process is reduced to limits, in another embodiment, by negative-feedback electricity
The phase of the input signal on road degree is scanned in the predetermined time from 0 degree to 360, in the stable phase angle for detecting negative-feedback circuit
Behind section, stop the scanning to the phase behind stable phase angle section, without having to from 0 degree of scanning to 360 degree, when saving
Between and negative-feedback circuit processor resource.
Phasing unit 604 be used for using the optimum phase as the phase of the input signal of the negative-feedback circuit into
Row input.
Phasing unit 604 after obtaining the optimum phase of negative-feedback circuit, to the input signal of negative-feedback circuit into
Row calibration, inputs above-mentioned optimum phase as the phase of the input signal of negative-feedback circuit.
It is different from the prior art, the collecting unit of the device of the phase alignment of present embodiment is collecting negative-feedback circuit
Stability index signal after, stable detection unit is detected stability index signal, to judge whether negative-feedback circuit is stablized,
Stable phase angle determination unit detects the stable phase angle of negative-feedback circuit when stable detection unit determines that negative-feedback circuit is unstable
Section, and optimum phase is determined according to stable phase angle section, phasing unit is using optimum phase as the defeated of negative-feedback circuit
The phase for entering signal is inputted.By the above-mentioned means, can under the premise of not changing original degeneration factor mentality of designing,
It realizes the calibration to phase information, ensures the stability of equipment, and the scope of application does not limit, it can be in different equipment and device
See it is easy-to-use, have preferable versatility.And present invention itself is simple in structure, it can be achieved that property is strong, has stronger practicability.
It is the structural schematic diagram of one embodiment of equipment of phase alignment of the present invention refering to Fig. 7, Fig. 7.Present embodiment
The equipment of phase alignment includes processor 701 and memory 702,
Processor 701 and memory 702 are coupled by bus 703, and it includes data/address bus that wherein bus 903, which is removed,
Except, can also include power bus, controlling bus and status signal bus in addition etc..But for the sake of clear explanation, in figure
Various buses are all designated as bus 703.
Processor 701 is for acquiring stability index signal in negative-feedback circuit, by being carried out to the stability index signal
Detection determines whether the negative-feedback circuit is stablized；When determining that the negative-feedback circuit is unstable, the negative-feedback electricity is detected
The stable phase angle section on road determines optimum phase according to the stable phase angle section；And using the optimum phase as described negative
The phase of the input signal of feedback circuit is inputted.
Specifically, it in order to ensure that the loop for the degeneration factor being closed is in normal working condition, needs to negative-feedback
The stability of circuit is differentiated.Processor 701 acquires in real time can characterize whether negative-feedback circuit is in stable state
Stability index signal.
Being generally possible to the negative-feedback circuit that embodiment is closed, whether the index in stable state has very much, such as works as negative-feedback
When circuit plays pendulum, it may appear that the band external expansion of signal, therefore the equipment of phase alignment can be by acquiring with outer letter
Number amplitude determine whether negative-feedback circuit is stablized.In addition, when unstable state occur in some negative-feedback circuits, due to phase
There is deviation in position information, and transmission signal is lost, it may appear that the distortion of signal is influenced by negative-feedback circuit is unstable, negative
The power supply situation of feedback circuit changes, and therefore, processor 701 can also be negative by the distortion degree or detection that acquire signal
The variation of the supply current or voltage of feedback circuit judges whether negative-feedback circuit is stablized.In other embodiments, it also wraps
Other stable phase angle indexs are included, are not limited herein.
Processor 701 is after collecting stability index signal, in order to determine whether current negative-feedback circuit is stablized, further
Ground is by being detected stability index signal, to judge whether negative-feedback circuit is in stable state.Such as whether judge signal
There is band external expansion, whether amplitude is stablized, whether signal distortion occurs, whether supply current and voltage normal etc., herein
It repeats no more.
Processor 701 is determined by the detection to stability index signal, if current steady index signal is shown normally,
I.e. negative-feedback circuit is in stable state, and the device of phase-detection does not change the current input phase of negative-feedback circuit.
If current negative-feedback circuit plays pendulum, processor 701 is by the phase of the input signal of negative-feedback circuit
Position degree is scanned in the predetermined time from 0 degree to 360, and detection stability index signal, passes through inspection while scan input signal
Stability index signal is surveyed it is found that during the phase of input signal is from 0 degree to 360 degree of scannings, negative-feedback circuit is also in stabilization
Switch between state and unstable state, stable phase angle determination unit 603 further determines that negative-feedback circuit is in stable state
When corresponding stable phase angle section.Wherein, it is found by repeated detection, aforementioned stable phase interval is continuous section.Specifically
The reason is as follows that：
Since for a negative-feedback circuit, the stabilization of negative-feedback circuit whether is generally dependent on the gain of circuit
Nargin and phase margin, if the gain margin of negative-feedback circuit is fixed, the stabilization of negative-feedback circuit whether, is abundant by phase
Degree determines.Above-mentioned principle is explained from the angle of mathematics below.
Assuming that the gain margin of negative-feedback circuit is Q, then the phase value P of the real input signal of negative-feedback circuit with it is best
The absolute value of the difference for meeting P and P0 between phase P0 is less than Q, shown in following relational expression：
|P-P0|<Q；
That is (P0-Q)<P<(P0+Q).
From the foregoing, it will be observed that the phase P of the input signal of negative-feedback circuit is stable in section [P0-Q, P0+Q], i.e., surely
Phase bit section is continuous section [P0-Q, P0+Q].
Although negative-feedback circuit can all show relatively stable state in entire stable phase angle section, detecting
Middle discovery will appear an optimum phase corresponding with minimal error, specifically, present embodiment in stable phase angle section
In, by the way of average, the interphase place value for defining the stable phase angle section is optimum phase：
[(P0-Q)+(P0+Q)]/2=P0.
In the present embodiment, processor 701 is that the stability in real time to negative-feedback circuit is detected.But have
When stable phase angle section be not to appear at 360 degree of position, in order to save sweep time, also for convenient for greatest extent
Ground reduces the influence to equipment normal work in phase calibration process, in another embodiment, by the defeated of negative-feedback circuit
Enter the phase of signal degree to be scanned from 0 degree to 360 in the predetermined time, in the stable phase angle section for detecting negative-feedback circuit
Afterwards, stop scanning to the phase behind stable phase angle section, without having to from 0 degree scanning to 360 degree, with save the time with
The processor resource of negative-feedback circuit.
Processor 701 calibrates the input signal of negative-feedback circuit after obtaining the optimum phase of negative-feedback circuit,
It is inputted above-mentioned optimum phase as the phase of the input signal of negative-feedback circuit.
Memory 702 is used to store the program run in the processor and be generated in described program operational process
Data.It may include read-only memory and random access memory, and instruction and data provided to processor 701.Memory 702
It is a part of can also include nonvolatile RAM (NVRAM).
Memory 702 stores following element, can perform unit either data structure either their subset or
Their superset:
Operational order：Including various operational orders, for realizing various operations.
Operating system：Including various system programs, for realizing various basic businesses and the hardware based task of processing.
In embodiments of the present invention, operational order (operational order that processor 701 is stored by calling memory 702
It is storable in operating system), to execute aforesaid operations.
Processor 701 can also be known as CPU (Central Processing Unit, central processing unit).Memory
702 may include read-only memory and random access memory, and provide instruction and data to processor 901.Memory 702
A part can also include nonvolatile RAM (NVRAM).
The method that the embodiments of the present invention disclose can be applied in processor 701, or be realized by processor 701.
Processor 701 may be a kind of IC chip, the processing capacity with signal.During realization, the above method it is each
Step can be completed by the integrated logic circuit of the hardware in processor 701 or the instruction of software form.Above-mentioned processing
Device 701 can be general processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), ready-made programmable gate array
(FPGA) either other programmable logic device, discrete gate or transistor logic, discrete hardware components.May be implemented or
Person executes disclosed each method, step and the logic diagram in the embodiment of the present invention.General processor can be microprocessor or
Person's processor can also be any conventional processor etc..The step of method in conjunction with disclosed in the embodiment of the present invention, can be straight
Connect and be presented as that hardware decoding processor executes completion, or in decoding processor hardware and software unit combination executed
At.Software unit can be located at random access memory, and flash memory, read-only memory, programmable read only memory or electrically-erasable can
In the storage medium of this fields such as programmable memory, register maturation.The storage medium is located at memory 702, and processor 701 is read
Information in access to memory 702, in conjunction with the step of its hardware completion above method.
It is different from the prior art, the processor of the equipment of the phase alignment of present embodiment is collecting negative-feedback circuit
After stability index signal, stability index signal is detected, to judge whether negative-feedback circuit is stablized, is determining negative-feedback electricity
When road is unstable, the stable phase angle section of negative-feedback circuit is detected, and optimum phase is determined according to stable phase angle section, and will most
Good phase is inputted as the phase of the input signal of negative-feedback circuit.By the above-mentioned means, original bear can not changed
Under the premise of reponse system mentality of designing, realizes the calibration to phase information, ensure the stability of equipment, and the scope of application is unlimited
It is fixed, can see with device in different equipment it is easy-to-use, with preferable versatility.And present invention itself is simple in structure, can be real
Existing property is strong, has stronger practicability.
Mode the above is only the implementation of the present invention is not intended to limit the scope of the invention, every to utilize this
Equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content, it is relevant to be applied directly or indirectly in other
Technical field is included within the scope of the present invention.
Claims (8)
1. a kind of method of phase alignment, which is characterized in that including：
Acquire the stability index signal of negative-feedback circuit；
The stability index signal is detected, and judges whether the negative-feedback circuit is stablized；
When the negative-feedback circuit is unstable, the phase of the input signal of the negative-feedback circuit is swept in the predetermined time
It retouches, the stable phase angle section of the negative-feedback circuit is determined by detecting the stability index signal, and according to the stable phase
Position section determines optimum phase；And
It is inputted the optimum phase as the phase of the input signal of the negative-feedback circuit.
2. according to the method described in claim 1, it is characterized in that, described determine optimum phase according to the stable phase angle section
The step of include：
The interphase place value in the stable phase angle section is determined as optimum phase.
3. according to the method described in claim 1, it is characterized in that, the phase of the input signal by the negative-feedback circuit
It is scanned in the predetermined time, the stable phase angle section of the negative-feedback circuit is determined by the detection stability index signal
Step includes：
The phase of the input signal of the negative-feedback circuit degree is scanned in the predetermined time from 0 degree to 360, passes through and detects institute
State the stable phase angle section that stability index signal determines the negative-feedback circuit.
4. according to the method described in claim 1, it is characterized in that, the phase of the input signal by the negative-feedback circuit
It is scanned in the predetermined time, the stable phase angle section of the negative-feedback circuit is determined by the detection stability index signal
Step includes：
The phase of the input signal of the negative-feedback circuit degree is scanned in the predetermined time from 0 degree to 360, until detecting institute
After stating stable phase angle section, stopping is scanned the subsequent phase in stable phase angle section.
5. a kind of equipment of phase alignment, which is characterized in that including processor and memory,
The processor is used for, and stability index signal in negative-feedback circuit is acquired, by being examined to the stability index signal
It surveys and determines whether the negative-feedback circuit is stablized；When determining that the negative-feedback circuit is unstable, by the negative-feedback circuit
The phase of input signal is scanned in the predetermined time, and the negative-feedback circuit is determined by detecting the stability index signal
Stable phase angle section determines optimum phase according to the stable phase angle section；And using the optimum phase as the negative-feedback
The phase of the input signal of circuit is inputted；
The memory is used for, the number for storing the program run in the processor and being generated in described program operational process
According to.
6. equipment according to claim 5, which is characterized in that the processor is specifically used for the stable phase angle section
Interphase place value be determined as optimum phase.
7. equipment according to claim 5, which is characterized in that the processor is specifically used for the negative-feedback circuit
The phase of input signal degree is scanned in the predetermined time from 0 degree to 360, by detecting described in the stability index signal determines
The stable phase angle section of negative-feedback circuit.
8. equipment according to claim 5, which is characterized in that the processor is specifically used for the negative-feedback circuit
The phase of input signal degree is scanned in the predetermined time from 0 degree to 360, until after detecting the stable phase angle section, is stopped
The subsequent phase in stable phase angle section is scanned.
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| KR100424180B1 (en) * | 2001-12-21 | 2004-03-24 | 주식회사 하이닉스반도체 | A delay locked loop circuit with duty cycle correction function |
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| CN1866744A (en) * | 2005-10-10 | 2006-11-22 | 华为技术有限公司 | Digital logic phase-locked loop realizing apparatus |
| CN102891656A (en) * | 2012-06-27 | 2013-01-23 | 中国电子科技集团公司第四十一研究所 | Internal detection based automatic calibrating method for broadband signal open loop power |
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