CN106533393A - Sine wave digital phase shifting circuit - Google Patents
Sine wave digital phase shifting circuit Download PDFInfo
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- CN106533393A CN106533393A CN201611238990.8A CN201611238990A CN106533393A CN 106533393 A CN106533393 A CN 106533393A CN 201611238990 A CN201611238990 A CN 201611238990A CN 106533393 A CN106533393 A CN 106533393A
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- 230000015654 memory Effects 0.000 claims abstract description 29
- 230000010363 phase shift Effects 0.000 claims description 44
- 230000003321 amplification Effects 0.000 claims description 15
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 15
- 238000002955 isolation Methods 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 208000010138 Diastema Diseases 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
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- 210000000475 diastema Anatomy 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
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- 238000011896 sensitive detection Methods 0.000 description 1
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- 238000005303 weighing Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H17/00—Networks using digital techniques
- H03H17/08—Networks for phase shifting
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B11/00—Automatic controllers
- G05B11/01—Automatic controllers electric
- G05B11/36—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential
- G05B11/42—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential for obtaining a characteristic which is both proportional and time-dependent, e.g. P. I., P. I. D.
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
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Abstract
The present invention relates to a sine wave digital phase shifting circuit. The circuit is characterized by comprising two multiplication type D/A converters, two ROM memories, two followers, a transformer, and a 90-degree phase shifting circuit. The two ROM memories respectively store cosine data of 2<n> digital angles theta and sine data of 2<n> digital angles theta. Outputs of the two ROM memories are respectively connected with corresponding digital input ends of the two multiplication type D/A converters. Reference voltage input ends V<R> of the two multiplication type D/A converters are respectively connected with a sine wave ksinomegat and a cosine kcosomegat of the sine wave of an analog signal with phase shifted. The outputs are input into a primary level of the transformer evenly, and a secondary output of the transformer is a sine wave output after phase shifting. Compared with the prior art, the circuit has the advantages of high accuracy of phase shifting angle, high phase shifting speed, and closed loop feedback control by using various digital PID control manners.
Description
Technical field
The present invention relates to a kind of digital phase shift circuit, category electronic signal measurement and control technology field.
Background technology
Phase shifter is a kind of two ends mouthpiece, and major function is that the phase place to transmission signal is adjusted to meet system
Require.There are analog phase shifter and digital phase shifter phase shifter, under noise or interference environment tracks small-signal, and this requires phase shift
Utensil have phase shifting accuracy high, strong antijamming capability and it is easily controllable the features such as, analog phase shifter due to the restriction of theory structure,
Design requirement can not be met, typically using digital phase shifter.Digital phase shifter is the core of phase-sensitive detection, phase controlling
Part, is widely used in the various control systems such as Aeronautics and Astronautics, navigation and communication system, such as radar directed navigation, coordinate transform, fire
In the various industrial uses such as big gun control, microwave apparatus and measuring system, machine tool control system, put in various high-precision linear power
In big device circuit design, digital phase shifter is also main circuit.
Mainly have to the circuit for realizing digital phase shifter at present:The circuit forms such as switching mode, DDS types, traditional numeral
Phase shifter is mainly realized by PIN switching diodes or ferrite device.Design be simply easily achieved, due to hard switching exist compared with
Big switching loss, limits the raising of switching frequency, and is affected by phase-shift control circuit, and phase shift angle control accuracy is not
Height, the defect of such phase shifter is that phase shifting accuracy is relatively low, and its phase shift digit is generally less than 7, it is difficult to directly meet high-precision phase position
Control and the system requirements of Phase Tracking.In traditional high-precision phase position control design case, " diastema technology " is typically employed to
Make up this not enough, but its consequence is to cause increasing for phase controlling level, to the interference free performance of application system extremely not
Profit.Although direct digital frequency synthesis technology (direct digital synthesis, write a Chinese character in simplified form DDS) goes out from the concept of phase place
Send out and signal is synthesized, employ Digitized Structure, when changing with accurate frequency and phase resolution, fast frequency
Between the features such as, may make up high accuracy phase shifting device, but which will adopt DDS chips, or adopt DSP and fpga chip to replace original
The phase-shift circuit that constitutes of traditional single-chip microcomputer, to reach the purpose of high accuracy phase shift, but hardware cost is too high, and software debugging is multiple
It is miscellaneous, often change a phase shift and will readjust software, in-convenience in use, and limited by wave filter, to high-frequency signal phase shift
Effect is dissatisfied.
The content of the invention
The goal of the invention of the present invention is to provide a kind of phase shift angle high precision, speed soon, and can adopt various numbers
Word PID control method realizes the sine wave digital phase shift circuit of closed loop feedback control.
The present invention to be achieved in that and be connected with resistance R's including two multiplication type d/a converters, two ROM memories, two
The follower (amplification of follower is 1) of operational amplification circuit composition, transformator, 90 phase-shift circuits, resistance R are connected to
Between the end of oppisite phase and outfan of operational amplification circuit, the angle for needing phase shift is n positions binary code b1 b2 …bi…bn(bi=0
Or 1, i=1,2,3 ..., the digital angle θ that n) constitutes, set the weight of i-th bit in the binary code of n positions asa i =180º/2i -1, i=1,2,3 ..., n, n positions binary code b1 b2 …bi…bnIn i-th bit biIf 0, represent represented by the i-th bit
Angle be zero, if i-th bit biBe 1, angle represented by the i-th bit is represented as its weight i.e. 180/2i-1, digital angle θ
It is all b in the binary code of n positionsiPosition is 1 corresponding weight sum, i.e. θ=b i a i , wherein a ROM memory stores 2 respectivelyn
The cosine cos θ data (m' positions binary code) of individual digital angle θ, another ROM memory stores 2 respectivelynThe sine of individual digital angle θ
Sin θ data (m' positions binary code), the n positions binary code corresponding to digital angle θ is simultaneously as the corresponding of two ROM memories
The address of cos θ data and sin θ data, the output (m' positions binary code numeral output) of two ROM memories are taken advantage of with two respectively
The wherein corresponding digital input end of method type D/A converter is connected, and the output digit of ROM memory is turned with multiplying-type D/A that is connected
Parallel operation numeral input digit is corresponding, the reference voltage of the wherein multiplication type d/a converter being connected with a wherein ROM memory
Input VRIt is connected with analogue signal sine wave ksin ω t (k is constant coefficient) being shifted by, is connected with another ROM memory
Another multiplication type d/a converter reference voltage input terminal VRWith cosine formula kcos ω t (the ksin ω t Jing 90 of sine wave
Phase-shift circuit is obtained) it is connected, Jing is connected with the operational amplification circuit structure of resistance R respectively for the output of two multiplication type d/a converters
Into follower isolation drive, be balanced and be input to primary, the sine wave that the secondary of transformator is output as after phase shift is defeated
Go out.
During work, n positions binary code is selected by physical switch (such as micro-computer controlling apparatus etc.), it is determined that needing displacement
Digital angle θ, make two ROM memories while exporting the cos θ and sin θ (number of the cos θ of output and sin θ for m' positions binary code
Word information) be converted into analog information to two multiplication type d/a converter Jing multiplication type d/a converters respectively, and respectively with treat phase shift
The sinusoid ksin ω t analogue signals of sine wave are multiplied with the cosine formula kcos ω t analogue signals of sine wave, the simulation letter for obtaining
Number (k'sin ω tcos θ and k'cos ω tsin θ, k' are the constant coefficients after conversion) respectively Jing operational amplification circuits constitute with
After with device isolation drive, while being added to the two ends of primary, k'sin ω tcos θ-k'cos ω tsin θ=k'sin is obtained
The sine wave-shaped signal of (ω t- θ), that is, realize the angle phase shift to sinusoid ksin ω t analogue signals.The cosine formula of sine wave
Kcos ω t analogue signals are by being obtained after 90 phase-shift circuits after phase shift sine wave.
Compared with the prior art the present invention, is synchronous electronic information due to being input into and exporting, and, by arranging two
The digit of ary codes n, can just obtain the phase shift angle of required precision and cover all of angle with required precision, because
This, it is fast with phase shift angle high precision, speed, and closed loop feedback control can be realized using various digital PID control methods
Advantage.
Description of the drawings
Fig. 1 is the circuit diagram of the present invention.
Specific embodiment：
The present invention is described in further detail in conjunction with drawings and Examples：
As illustrated, the operational amplification circuit structure of resistance R is connected with including two multiplication type d/a converters, two ROM memories, two
Into follower (amplification of follower be 1), transformator, 90 phase-shift circuits, resistance R are connected to operational amplification circuit
Between end of oppisite phase and outfan, the angle for needing phase shift is n positions binary code b1 b2 …bi…bn(bi=0 or 1, i=1,2,
3rd ... the digital angle θ for, n) constituting, set the weight of i-th bit in the binary code of n positions asa i =180º/2i-1, i=1,2,
3rd ..., n, n position binary code b1 b2 ….bi…bnIn i-th bit biIf 0, represent angle represented by the i-th bit as
Zero, if i-th bit biBe 1, angle represented by the i-th bit is represented as its weight i.e. 180/2i-1, digital angle θ is n positions two
All b in ary codesiPosition is 1 corresponding weight sum, i.e. θ=b i a i , wherein a ROM memory stores 2 respectivelynIndividual numeral
The cosine cos θ data (m' positions binary code) of angle θ, another ROM memory stores 2 respectivelynThe sinusoidal sin θ number of individual digital angle θ
According to (m' positions binary code), the corresponding cos θ numbers simultaneously as two ROM memories of the n positions binary code corresponding to digital angle θ
According to the address with sin θ data, the output (m' positions binary code numeral output) of two ROM memories respectively with two multiplying-type D/A
The wherein corresponding digital input end of transducer is connected, output digit and the multiplication type d/a converter number that is connected of ROM memory
Word input digit is corresponding, the reference voltage input terminal of the wherein multiplication type d/a converter being connected with a wherein ROM memory
VRIt is connected with the analogue signal sine wave ksin ω t being shifted by, another multiplying-type D/A conversion being connected with another ROM memory
The reference voltage input terminal V of deviceRWith the cosine formula kcos ω t of sine wave（90 phase-shift circuits of ksin ω t Jing are obtained）It is connected, two
Jing is connected with the follower isolation drive that the operational amplification circuit of resistance R is constituted respectively for the output of multiplication type d/a converter, is put down
Weighing apparatus is input to primary, and the secondary of transformator is output as the sinewave output after phase shift.
During work, by physical switch（Such as micro-computer controlling apparatus etc.）Select the digital angle θ of n positions binary code（As θ is
0000101000, i.e. n are 10, then it represents that corresponding angle, θ=180/25-1+180º/27-1=11.25°+2.8125°=
14.0625 °, while 0000101000 address again as two ROM；And for example the digital angle θ of n positions binary code is
00000101000, i.e. n are 11, then it represents that corresponding angle, θ=180 °/26-1+180°/28-1=5.625°+1.40625°=
7.03125°）, while 00000101000 address again as two ROM, makes two ROM memories while exporting cos θ and sin θ
（The cos θ of output and the digital information that sin θ is m' positions binary code）Respectively to two multiplication type d/a converters, Jing multiplying-type D/A
Transducer is converted into analog information, and respectively with treat more than the sinusoid ksin ω t analogue signals and sine wave of phase shift sine wave
String formula kcos ω t analogue signals are multiplied, the follower isolation drive that the analogue signal difference Jing operational amplification circuits for obtaining are constituted
Afterwards, the two ends of primary are added to respectively simultaneously, so as to obtain the sine wave-shaped signal at phase shift θ angles.The cosine of sine wave
Formula kcos ω t simulations are by being obtained after 90 ° of phase-shift circuits after phase shift sine wave.
By taking n=10 as an example, two ROM memories each data for being stored have 1010=1024 and corresponding 1010=1024 two
The address of scale coding form, it is as shown in the table：
Here the phase shift angle required precision that numeral angle θ can be as needed sets the digit of binary code n, ROM1Storage
Digital angle θ corresponding cosine (i.e. the digital information of the m' positions binary code of cos θ) output is to multiplication type d/a converter 1
The digit and ROM of conversion digit order number input2The corresponding sines of storage numeral angle θ (i.e. believe by the numeral of the m' positions binary code of sin θ
Breath) output to multiplication type d/a converter 2 conversion digit order number be input into digit it is identical, and its digit depending on cos θ with
Sin θ precision prescribed, memorizer export the selection of digit m', depending on the selection of D/A converter digit, that is, also depend on measurement
Required precision, D/A converter digit are higher, and converted measurement is higher, can take eight here（Precision is 1.40625 °）, ten
（Precision is 0.3515625 °）, 12（Precision is 180 °/4096）, sixteen bit（Precision is 180 °/65536）D/A conversion
Device；The digit of ROM memory is determined according to the D/A converter selected.
Additionally, operational amplifier A1、A2The follower amplification of composition is 1, operational amplifier A1、A2Parameter is consistent,
Two resistance R are equal, and precision is better than one thousandth.Transformator requires superhigh magnetic conductivity, to guarantee phase shifting accuracy.
When specifically used：
1. eight, ten, 12, the D/A converter of sixteen bit are selected according to the requirement of phase shifting accuracy；
2. the digit of the binary code of numeral angle θ is determined according to the D/A converter selected；
3. the size of computing follow-up amplifier and resistance R is determined according to phase shifting accuracy, and its precision of resistance R is in one thousandth
More than；
4. connect circuit according to schematic diagram and always adjust.
By taking n=10 as an example, minimum phase shift angle is 180 °/210-1=0.3515625 °, when digital angle θ is 0000101000
When, then it represents that angle, θ=180 °/25-1+180°/27-1=11.25 °+2.8125 °=14.0625 °, while 0000101000 makees again
For the address of two ROM, as example, the principle explanation of phase shift is carried out：
The sinusoid for treating phase shift sine wave is：
ksinωt
The cosine formula of the sine wave obtained after 90 ° of phase-shift circuits after phase shift sine wave is：kcosωt
By computer or other method inputs 0000101000, that is, the angle, θ for needing phase shift is 14.0625 °, while
00000101000 address again as two ROM,
The wherein result obtained by a multiplication type d/a converter is：
k'sinωt×cosθ= k'sinωtcosθ （1）
The result obtained by another multiplication type d/a converter is：
k'cosωt×sinθ= k'cosωtsinθ （2）
Analogue signal Jing after operational amplification circuit gain（1）、（2）It is added to the two ends of primary respectively simultaneously, it is secondary
The result of output is：
k'sinωtcosθ-k'cosωtsinθ= k'sin (ωt -θ) （3）
Phase shift θ=14.0625 ° are realized.
Claims (2)
1. a kind of sine wave digital phase shift circuit, it is characterised in that connect including two multiplication type d/a converters, two ROM memories, two
Follower, transformator that the operational amplification circuit of resistance R is constituted are connected to, 90 phase-shift circuits, resistance R are connected to operation amplifier electricity
Between the end of oppisite phase and outfan on road, the angle for needing phase shift is n positions binary code b1 b2 …bi…bn(bi=0 or 1, i=1,2,
3rd ... the digital angle θ for, n) constituting, set the weight of i-th bit in the binary code of n positions asa i =180º/2i-1, i=1,2,
3rd ..., n, n position binary code b1 b2 …bi…bnIn i-th bit biIf 0, represent angle represented by the i-th bit as
Zero, if i-th bit biBe 1, angle represented by the i-th bit is represented as its weight i.e. 180/2i-1, digital angle θ is n positions two
All b in ary codesiPosition is 1 corresponding weight sum, i.e. θ=b i a i , wherein a ROM memory stores 2 respectivelynIndividual digital angle
The cosine cos θ data of θ, another ROM memory store 2 respectivelynThe sinusoidal sin θ data of individual digital angle θ, corresponding to digital angle θ
N positions binary code corresponding cos θ data and the address of sin θ data simultaneously as two ROM memories, two ROM memories
Output (m' positions binary code numeral output) wherein corresponding digital input end phase respectively with two multiplication type d/a converters
Even, the output digit of ROM memory is corresponding with connected multiplication type d/a converter numeral input digit, deposits with a wherein ROM
The reference voltage input terminal V of the wherein multiplication type d/a converter that reservoir is connectedRWith the analogue signal sine wave ksin being shifted by
ω t are connected, the reference voltage input terminal V of another multiplication type d/a converter being connected with another ROM memoryRWith sine wave
Cosine formula kcos ω t are connected, and 90 phase-shift circuits of ksin ω t Jing are obtained, and the output difference Jing of two multiplication type d/a converters connects
Be connected to resistance R operational amplification circuit constitute follower isolation drive, be balanced and be input to primary, transformator time
Level is output as the sinewave output after phase shift.
2. sine wave digital phase shift circuit according to claim 1, it is characterised in that the amplification of follower is 1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611238990.8A CN106533393B (en) | 2016-12-28 | 2016-12-28 | Sine wave digital phase shifting circuit |
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| CN201611238990.8A CN106533393B (en) | 2016-12-28 | 2016-12-28 | Sine wave digital phase shifting circuit |
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| CN106533393B CN106533393B (en) | 2023-06-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115616489A (en) * | 2022-09-30 | 2023-01-17 | 西安航空学院 | Phase shifting method and system for realizing arbitrary phase shifting value by ultrasonic wave or electric wave |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5276633A (en) * | 1992-08-14 | 1994-01-04 | Harris Corporation | Sine/cosine generator and method |
| CN103532556A (en) * | 2013-10-28 | 2014-01-22 | 连云港杰瑞电子有限公司 | Axial angle signal-to-serial digital signal conversion circuit of single chip |
| CN206389341U (en) * | 2016-12-28 | 2017-08-08 | 佛山科学技术学院 | A kind of sine wave digital phase shift circuit |
-
2016
- 2016-12-28 CN CN201611238990.8A patent/CN106533393B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5276633A (en) * | 1992-08-14 | 1994-01-04 | Harris Corporation | Sine/cosine generator and method |
| CN103532556A (en) * | 2013-10-28 | 2014-01-22 | 连云港杰瑞电子有限公司 | Axial angle signal-to-serial digital signal conversion circuit of single chip |
| CN206389341U (en) * | 2016-12-28 | 2017-08-08 | 佛山科学技术学院 | A kind of sine wave digital phase shift circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115616489A (en) * | 2022-09-30 | 2023-01-17 | 西安航空学院 | Phase shifting method and system for realizing arbitrary phase shifting value by ultrasonic wave or electric wave |
| CN115616489B (en) * | 2022-09-30 | 2023-08-18 | 西安航空学院 | Phase shifting method and system for realizing arbitrary phase shifting value by using ultrasonic wave or electric wave |
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