CN101281041A - Single power supply CMOS integrated circuit autosyn / rotary transformer - digital conversion technique - Google Patents
Single power supply CMOS integrated circuit autosyn / rotary transformer - digital conversion technique Download PDFInfo
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Abstract
The invention is a digital converting technology for a single power source CMOS integrated circuit differential synchro/rotating transformer, characterized in that the technology processes the digital treatment for the differential synchro/rotating transformer signal, and converts the differential synchro/rotating transformer signal as the binary digital signal which is composed of a solid control transformer circuit, a alternative current error amplifier circuit, a phase-sensitive demodulating circuit, an integral circuit, a voltage control shaking circuit and a digital control circuit; the technology uses the standard CMOS integrated circuit technique of the single power source for integrating the circuit on the single chip to achieve the digital converting from the angle quantity. The invention has high precision, low cost which can achieve the high density installation of the system component.
Description
Technical field
The present invention belongs to technical field of integrated circuits, the universal CMOS integrated circuit autosyn/rotary transformer-digital conversion technique of particularly a kind of single supply.
Background technology
Selsyn is a kind of induction type electromechanical compo, be used for automatic control, transmit and calculate the answer system synchronously, the corner of rotating shaft is transformed to electric signal or electric signal is transformed to the corner of rotating shaft, realize remote transmission, reception and the conversion of angle-data, reach the purpose of automatic indication angle, position, distance and instruction.
Rotary transformer is the signal element that a kind of output voltage changes with angle of rotor.When field copper during with the alternating voltage excitation of certain frequency, the voltage of output winding is tied to form sine with the functional relationships of angle of rotor, cosine function concerns.It is mainly used in coordinate transform, triangulo operation and angle-data transmission.
Autosyn/rotary transformer is as shaft angle displacement measurement element, has measuring accuracy height, simple in structure, reliable, be mainly used in all very high environment of precision prescribed, reliability, compare with other angle measurement method, autosyn/rotary transformer is used for measurement of angle and has remarkable advantages.
1, on performance: because autosyn/rotary transformer inside is without any electronic component, its vibration resistance, temperature tolerance, corrosion resistivity, anti-dust and aspects such as greasy dirt and anti-interference all have good performance, can adapt to the request for utilization of any environment, have high reliability.And photo-electric, raster pattern, magnetoelectric sensor inner integrated a lot of electronic devices and components, vibrated easily, life-span of temperature, corrosive gas, dust and greasy dirt and light source influences, its interference free performance is also not as selsyn and rotary transformer.
2, from using: with the axis angle measurement system that autosyn/rotary transformer is formed, it is wide to have working range, can directly transmit the displacement information of 360 ° of angles of circumference, and need not mechanically contact when long-distance transmissions information.Installation dimension selects the space big, can have from diameter 20mm～200mm, and physical dimension is not subjected to the influence of resolution; Easy to connect between sensor and the data processing section, only need 5 or 6 lines.
Autosyn/rotary transformer is as the axis angle measurement element, for automatic control system provides low-cost, high-precision position transducer.In industrial detection control field, selsyn signal/signals of rotating transformer need be converted to digital signal is used for microprocessor or computing machine carries out data processing.At present, realize that autosyn/rotary transformer-digital conversion mode has two kinds, a kind of is the special chip assembling of adopting offshore company to produce, because special chip price height, the expense of product is higher than the mode of other measurement of angle.A kind of is to adopt D/A converter, operational amplifier, resistor network etc. to separate the coding circuit that element is formed, this conversion regime adopts split-type structural, need to use a large amount of resolution elements inevitably, have following defective: volume is big, element distributes and relatively disperses, can not realize the system element high-density installation, volume ratio is bigger.Poor reliability has been used a large amount of resolution elements, and integrated level is low, has reduced the reliability of system.
Summary of the invention
Technical matters to be solved by this invention is at the deficiencies in the prior art, and single power supply CMOS integrated circuit autosyn/rotary transformer-digital conversion technique that a kind of volume is little, precision is high, cost is low is provided.
Technical matters to be solved by this invention is to realize by following technical scheme.The present invention is a kind of single power supply CMOS integrated circuit autosyn/rotary transformer-digital conversion technique, be characterized in, it carries out digitized processing to selsyn signal/signals of rotating transformer, selsyn signal/signals of rotating transformer is converted to binary digital signal, and it is made up of solid-state control transformer circuit, interchange error amplifying circuit, phase demodulation circuit, integrating circuit, Voltage-Controlled oscillation circuit and digital control circuit; It adopts the standard CMOS integrated circuit technology of single supply, and foregoing circuit is integrated on the single chip, realizes that angular metric is to digital conversion.
Technical matters to be solved by this invention can also further realize by following technical scheme.Above-described switch technology, be characterized in, the signals of rotating transformer of the selsyn signal of three-way input or the input of four lines is converted into the cosine and sine signal V1 and the V2 of low-voltage, the digital angle φ that produces with up-down counter sues for peace in solid-state control transformer circuit, error signal KEoSin of output after exchanging error amplifying circuit (θ-φ), the closed loop that this error signal is formed through phase demodulation circuit, integrating circuit, Voltage-Controlled oscillation circuit and digital control circuit is sought the Sin (zero point of θ-φ); When this process was finished, the digital angle φ of digital control circuit equaled signal input shaft angle θ.Wherein: θ is the shaft angle of selsyn; K is a no-load voltage ratio; Eo is the amplitude of reference voltage; ω is a carrier frequency, i.e. the angular frequency of excitation voltage.
Technical matters to be solved by this invention can also further realize by following technical scheme.Above-described switch technology, be characterized in, solid-state control transformer circuit adopts high 6 segment circuits and low 10 sub-circuits, high 6 segment circuits decompose 0 °-5.625 ° with 0 °-360 ° of angle variable quantities, low 10 sub-circuits adopt the D/A converter of R-2R resistance, constitute an analog multiplier, realize of the conversion of the interior analog angle of 0 ° of-5.625 ° of scope to digital angle.
Technical matters to be solved by this invention can also further realize by following technical scheme.Above-described switch technology is characterized in, exchanges the direct current signal in the error amplifying circuit employing AC coupling amplifying circuit elimination circuit, error signal KEoSin (θ-φ) by bandpass filter high frequency noise is dropped within the loop bandwidth.
Technical matters to be solved by this invention can also further realize by following technical scheme.Above-described switch technology is characterized in, the phase demodulation circuit will exchange error signal KEoSin by amplifier and analog switch, and (θ-φ) converts half-wave voltage signal to; Integrating circuit converts half-wave voltage signal to d. c. voltage signal by amplifier and resistance-capacitance network; Voltage-Controlled oscillation circuit adopts the homing position type voltage controlled oscillator, according to the size generation time clock of the direct-flow error voltage of importing; Digital control circuit is made up of up-down counter, data latching and logic control circuit, and it produces digital angle signal φ under the control of clock pulse signal.
Below the technology of the present invention is carried out specific description.
The circuit general function of switch technology of the present invention is to realize the conversion of analog angle to digital angle, its principle of work is to drive the new digital angle of subsequent conditioning circuit generation by the difference between analog angle and the digital angle to approach analog angle, analog angle and digital angle are equated in our permissible accuracy scope, thereby realized the conversion of analog angle to digital angle.It is divided into 2 parts, and a part is that analog angle and digital angle are asked poor, and another part is this difference signal to be handled produce the new digital angle that more approaches analog angle.First be exactly solid-state control transformer circuit mainly act on be realize analog angle and digital angle ask poor, produce the error electric signal, and the second portion effect is this electric signal to be handled produce new digital signal.This part is relatively complicated, what main cause was that solid-state control transformer circuit produces is sinusoidal signal, produces the new circuit that digital signal added for handling this signal: comprise the interchange error amplifying circuit, the phase demodulation circuit, integrating circuit, Voltage-Controlled oscillation circuit and digital control circuit.Wherein the phase demodulation circuit is that the error electric signal is carried out rectification, and adds integrating circuit and rectified signal is carried out Integral Processing produce stable direct current signal and drive follow-up Voltage-Controlled oscillation circuit work.Voltage-Controlled oscillation circuit is as interface generation digital signal acceptable clock signal and the direction signal of simulating signal to the digital signal conversion.
The overall circuit of switch technology of the present invention is a second order servo, and its major advantage is the astatism that can realize that constant speed is followed the tracks of, thereby realizes good dynamic characteristics.It mainly is made up of six parts: solid-state control transformer circuit exchanges error amplifying circuit, phase demodulation circuit, integrating circuit, Voltage-Controlled oscillation circuit, digital control circuit.Structure as shown in Figure 1.
1, solid-state control transformer circuit.
Solid-state control transformer circuit is to the cosine and sine signal of representative simulation angle and represents the switch controlling signal of digital angle to ask difference operation to obtain characterizing the sinusoidal signal (wherein the amplitude of sinusoidal signal is represented the difference size, and phase place is represented the difference direction) of its difference size and Orientation.Solid-state control transformer can be divided into 2 parts: high 6 segment circuits and low 10 sub-circuits.
High 6 segment circuit effects are to obtain analog angle and high 6 bit digital angle differences obtain two paths of signals, and this two paths of signals enters high 6 segment circuits (being actually 10 D/A conversions) and just think that when D/A output equals zero analog angle and numeral equate in accuracy rating.Being one positive one negative two signals (can comprise zero-signal) with regard to the two paths of signals that requires a high position to be input to low level like this, is null signal in accuracy rating through just obtaining output behind the follow-up D/A only in this way.
Make a concrete analysis of as follows: the input of representative simulation angle be the sine and cosine two paths of signals: Uin1=sin θ sin ω t; Uin2=cos θ sin ω t is because sin ω t is the first-harmonic of signal, so subsequent analysis is omitted sin ω t, we use Usin=sin θ traditionally, and Ucos=cos θ represents the two-way simulating signal imported, and we convert input to following form for convenient calculating:
Usin＝sinθ，
Ucos＝cosθ＝-sin(θ-90°)，
sin(θ-0°)＝Usin，
sin(θ-90°)＝-Ucos，
We can obtain through simple negate: sin (θ-180 °)=-Usin,
sin(θ-270°)＝Ucos，
sin(θ-360°)＝Usin.
The two paths of signals that faces mutually carries out additive operation and is averaged also passable the arriving of correction factor:
Top computing guarantees that arbitrarily angled θ can guarantee that a n makes
Sin (θ-n * 5.625 °) * sin[θ-(n+1) * 5.625 °]≤0 wherein: 0≤n≤63
Can the control by D/A guarantee that output equal 0 in accuracy rating facing 2 D/A that send into low level once positive one negative signal mutually, and select to make D/A that sends into low level once positive one negative signal and control D/A the null control signal of output represent the digital signal that equates with analog angle, thereby the conversion of realization analog to digital (also can understand so here want the digital angle that obtains by certain logical process can controlled signal that solid-state control transformer is output as is zero).
The low level segmentation is 10 a D/A converter.Two reference voltages of D/A are exactly that these two signals of two signals of high-order segmentation output are:
U15=sin (θ-n * 5.625 °) and U16=sin[θ-(n+1) * 5.625 °] or
U15=sin[θ-(n+1) * 5.625 °] and U16=sin (θ-n * 5.625 °)
0≤n≤63 wherein
Uref1=sin (θ-n * 5.625 °) 〉=0 is then arranged, Uref2=sin[θ-(n+1) * 5.625 °]≤0
The approximate sinusoidal signal of thinking is linear in 5.625 ° of scopes of n * 5.625 °≤θ≤(n+1), then for 5.625 ° of arbitrarily angled n * 5.625 °≤θ≤(n+1) then by the signals of output after the D/A control is
Uerror=sin[θ-(n+1) 5.625 °]+k[sin (θ-n * 5.625 °)-sin (θ-(n+1) * 5.625 °)] sin[θ-(n+1) 5.625 ° wherein=(1-k)]+ksin (θ-n * 5.625 °)
0≤k≤1，
The pairing digital quantity of k of this moment is just equal with analog angle θ when Uerror=0, realizes the conversion of digital to analogy.
Analog angle θ can divide 4 quadrants:
U1=sin in first quartile (θ-0 °), u2=sin (θ-90 °)
U1=sin in second quadrant (θ-180 °), u2=sin (θ-90 °)
U1=sin in third quadrant (θ-180 °), u2=sin (θ-270 °)
U1=sin in four-quadrant (θ-270 °), u2=sin (θ-360 °)
Can see by primary computing signal is transformed into angle in [90 °, 90] interval.
Compensated coefficient through resistance and amplifier
The back:
Obtain u4=sin (θ-45 °) at first quartile
Obtain u4=sin (θ-135 °) at second quadrant
Obtain u4=sin (θ-225 °) at third quadrant
Obtain u4=sin (θ-315 °) at four-quadrant
Signal u1, u2 and u4 pass through again
The back amplifying circuit obtains u7 and u8.
And u7=sin (θ-m * 22.5 °), u8=sin (θ-(m+1) 22.5 °) ... 1.
u7＝sin(θ-(m+1)×22.5°)，u8＝sin(θ-m×22.5°)…②
Formula is selected during for odd number as m when m selects formula during for even number in 0≤m≤15 2. 1., can see the coefficient that the amplifier through the back compensates again
Signal has been transformed in the scope of angle [22.5 °, 22.5 °].
Compensated coefficient through resistance and amplifier
After obtain
u10＝sin[θ-(2m+1)×11.25°]0≤m≤15
Signal has compensated coefficient through the resistance and the amplifier of back again
After obtain
U15=sin (θ-l * 5.625 °) and u16=sin[θ-(l+1) * 5.625 °] ... 3.
U15=sin[θ-(l+1) * 5.625 °] and u16=sin (θ-l * 5.625 °) ... 4.
3. 0≤l≤63 select formula 4. so just signal to be transformed in the angle [5.625 °, 5.625 °] during for odd number as l when l selects formula during for even number, just enter following D/A and change.
Our last surface analysis thinks that in 5.625 ° of scopes the linear signal of working as is input as:
When u15=sin (θ-l * 5.625 °) and u16=sin[θ-(l+1) * 5.625 °] time by after the D/A linearization
Obtain Uerror=(1-k) sin[θ-(n+1) 5.625 °]+ksin (θ-n * 5.625 °)
When u15=sin[θ-(l+1) * 5.625 °] and during u16=sin (θ-l * 5.625 °) by behind the D/A
Obtain Uerror=(1-k) sin[θ-(n+1) 5.625 °]+ksin (θ-n * 5.625 °)
Obtain error voltage Uerror when Uerror=0, realized the angular transition of analog to digital.
2, exchange error amplifying circuit.
Exchange to amplify adopt the AC coupling amplifying circuit to eliminate direct current signal in the circuit, circuit structure as shown in Figure 3: error signal KEoSin (θ-φ) by a R, the C coupling, filtering DC component wherein.R
1, R
2, C
1, C
2Constitute a bandpass filter, high frequency noise is dropped within the loop bandwidth, when placing this effect of significant noise circumstance particularly evident revolving to become.
It (also be KEoSin (θ-φ)), and following circuit is exactly how process errors voltage signal Uerror produces new digital angle that the front has introduced how analog angle and digital angle to ask difference and obtain error voltage signal Uerror.This part circuit has comprised the interchange error amplifying circuit, phase demodulation circuit, integrating circuit, Voltage-Controlled oscillation circuit and digital control circuit.
3, phase demodulation circuit.
The phase demodulation circuit is equivalent to a full-wave rectifying circuit, promptly the error signal of sinusoidal variations is become the steamed bun ripple.Be error signal to be adjusted by carrier frequency.Particular circuit configurations such as Fig. 4.Wherein the control signal Ref of selector switch is the square wave that is produced by excited signal.We know that the amplitude of error signal Uerror characterizes the difference of analog angle and digital angle, and phase place characterizes the direction of difference, and the effect of phase demodulation circuit is to judge that the direction of difference adjusts waveform simultaneously and be convenient to subsequent conditioning circuit error span is extracted.
4, integrating circuit.
The integrating circuit effect is that the signal after the phase depending on rectification is carried out the DC level velocity voltage Uvel that amplitude that filtering extracts error voltage Uerror obtains characterizing error span, drives follow-up voltage controlled oscillator work by Uvel then.Whole circuit structure such as Fig. 5.Integrating circuit mainly is that the amplitude that extracts error voltage Uerror produces can be for the velocity voltage signal Uvel of follow-up oscillatory circuit use.
The integrator main circuit is a correctable common integrator, and the element of integrator (resistance, electric capacity) can be selected to make converter have only dynamic perfromance according to the bandwidth of signal by the user.Tremble sign indicating number (when the digital angle φ that quantizes can not accurately represent input angle θ in order to prevent converter, the saltus step between ± 1bit continuously that is taken place), be provided with threshold interval, make it in the 1LSB scope, to keep error amount, the feedback of VCO is added to the integrator input end internally, with guarantee to have only when error during more than or equal to 1LSB VCO just understand refresh counter.
5, Voltage-Controlled oscillation circuit (VCO).
Voltage-Controlled oscillation circuit is that response speed voltage signal Uvel produces clock and the direction signal that uses for the back counter.Be that mimic channel arrives the digital circuit interface circuit.Adopt homing position type voltage-frequency converting circuit theory diagram as shown in Figure 6, circuit is made up of integrator and single limit comparer, and S is an analog switch, can be made up of metal-oxide-semiconductor.If output voltage U
OS disconnects during for high level, U
OS closure during for low level.When power connection, because voltage is zero on the capacitor C, i.e. U
VCO=0, make U
OBe height, S disconnects, and integrator is to U
VELIntegration, U
VCOReduce gradually; In case U
VCOCross reference voltage U
REF, U
OTo become low level, cause the S closure, and make C be discharged to zero rapidly, i.e. U
VCO=0, thus U
OTransition is high level; S disconnects again, repeats said process, and circuit produces self-sustained oscillation.U
VELBigger, U
VCOChange to U from zero
REFRequired time is weak point more, and oscillation frequency is also just high, and the U that constantly just changes
OThe clock signal that is produced exactly is U simultaneously
VCOPositive-negative polarity just represented " add, subtract " signal.Homing position type voltage-frequency converting circuit its oscillation period of T and frequency f shown in Figure 6 are:
T≈R·C·U
REF/U
VEL
f＝1/T
The VCO unit is phase sensitivity and filtered error signal to be processed make its clock signal that produces follow-up digital counter circuit and " add, subtract " signal on the whole, is the bound fraction of simulation part and numerical portion in the circuit.
6, digital control circuit.
It comprises counter circuit and data latching and auxiliary logical circuit.The effect of counter is that the pulse of the counting of VCO and up-down signal are produced digital counting, handle the generation control signal with these digital quantities by the back logical circuit then and control segment circuit, thereby constitute a closed loop, reach steady state (SS) through the feedback processing of not stopping and export correct digital angle amount then.What we adopted is 16 up-down counters, and increasing control bit simultaneously can be converted into 14 12 and 10 digit counters by switch control, can produce the zero-crossing pulse signal simultaneously.
Logical circuit is that 16 digital signal is transformed the control signal that becomes the solid-state control transformer circuit of control by logic, realizes the difference operation of asking of analog angle and digital angle.Finish the mathematical computations that solid-state control transformer circuit is realized, the switch of solid-state control transformer circuit switches individual characteristics, be once only to move a signal wire, adopt the mode of stepping, introduce XOR control in 5.625 ° of whiles of a high-order moved further at low level and realize the inverted problem of low level that high-order stepping causes, progressively finish the simulation of 360 ° of angles, these logic functions are attached in high-order and low level segmentation control the inside.Other auxiliary circuit is exactly INH, ENM, and ENL, a series of logic functions such as DATALOAD, these functions mainly are to realize data latching and put several functions by triple gate and d type flip flop.
The technology of the present invention performance index.
Autosyn/rotary transformer-DC voltage conversion performance index is as shown in the table.
Description of drawings
Fig. 1 is the theory diagram of the technology of the present invention.
Fig. 2 is solid-state control transformer circuit block diagram.
Fig. 3 is for exchanging error amplifying circuit figure.
Fig. 4 is the phase demodulation circuit diagram.
Fig. 5 is integrator circuit figure.
Fig. 6 is Voltage-Controlled oscillation circuit figure.
Embodiment
Below further describe concrete technical scheme of the present invention,, and do not constitute restriction its right so that those skilled in the art understands the present invention further.
Embodiment 1.A kind of single power supply CMOS integrated circuit autosyn/rotary transformer-digital conversion technique, it carries out digitized processing to selsyn signal/signals of rotating transformer, selsyn signal/signals of rotating transformer is converted to binary digital signal, and it is made up of solid-state control transformer circuit, interchange error amplifying circuit, phase demodulation circuit, integrating circuit, Voltage-Controlled oscillation circuit and digital control circuit; It adopts the standard CMOS integrated circuit technology of single supply, and foregoing circuit is integrated on the single chip, realizes that angular metric is to digital conversion.
Embodiment 2.In the embodiment 1 described switch technology, the signals of rotating transformer of the selsyn signal of three-way input or the input of four lines is converted into the cosine and sine signal V1 and the V2 of low-voltage, the digital angle φ that produces with up-down counter sues for peace in solid-state control transformer circuit, error signal KEoSin of output after exchanging error amplifying circuit (θ-φ), the closed loop that this error signal is formed through phase demodulation circuit, integrating circuit, Voltage-Controlled oscillation circuit and digital control circuit is sought the Sin (zero point of θ-φ); When this process was finished, the digital angle φ of digital control circuit equaled signal input shaft angle θ.
Embodiment 3.In the embodiment 1 described switch technology, solid-state control transformer circuit adopts high 6 segment circuits and low 10 sub-circuits, high 6 segment circuits decompose 0 °-5.625 ° with 0 °-360 ° of angle variable quantities, low 10 sub-circuits adopt the D/A converter of R-2R resistance, constitute an analog multiplier, realize of the conversion of the interior analog angle of 0 ° of-5.625 ° of scope to digital angle.
Embodiment 4.In the embodiment 1 described switch technology, exchange the direct current signal in the error amplifying circuit employing AC coupling amplifying circuit elimination circuit, error signal KEoSin (θ-φ) high frequency noise is dropped within the loop bandwidth by bandpass filter.
Embodiment 5.In the embodiment 1 described switch technology, the phase demodulation circuit will exchange error signal KEoSin by amplifier and analog switch, and (θ-φ) converts half-wave voltage signal to; Integrating circuit converts half-wave voltage signal to d. c. voltage signal by amplifier and resistance-capacitance network; Voltage-Controlled oscillation circuit adopts the homing position type voltage controlled oscillator, according to the size generation time clock of the direct-flow error voltage of importing; Digital control circuit is made up of up-down counter, data latching and logic control circuit, and it produces digital angle signal φ under the control of clock pulse signal.
Claims (5)
1. single power supply CMOS integrated circuit autosyn/rotary transformer-digital conversion technique, it is characterized in that, it carries out digitized processing to selsyn signal/signals of rotating transformer, selsyn signal/signals of rotating transformer is converted to binary digital signal, and it is made up of solid-state control transformer circuit, interchange error amplifying circuit, phase demodulation circuit, integrating circuit, Voltage-Controlled oscillation circuit and digital control circuit; It adopts the standard CMOS integrated circuit technology of single supply, and foregoing circuit is integrated on the single chip, realizes that angular metric is to digital conversion.
2. switch technology according to claim 1, it is characterized in that, the signals of rotating transformer of the selsyn signal of three-way input or the input of four lines is converted into the cosine and sine signal V1 and the V2 of low-voltage, the digital angle φ that produces with up-down counter sues for peace in solid-state control transformer circuit, error signal KEoSin of output after exchanging error amplifying circuit (θ-φ), the closed loop that this error signal is formed through phase demodulation circuit, integrating circuit, Voltage-Controlled oscillation circuit and digital control circuit is sought the Sin (zero point of θ-φ); When this process was finished, the digital angle φ of digital control circuit equaled signal input shaft angle θ.
3. switch technology according to claim 1, it is characterized in that, solid-state control transformer circuit adopts high 6 segment circuits and low 10 sub-circuits, high 6 segment circuits decompose 0 °-5.625 ° with 0 °-360 ° of angle variable quantities, low 10 sub-circuits adopt the D/A converter of R-2R resistance, constitute an analog multiplier, realize of the conversion of the interior analog angle of 0 ° of-5.625 ° of scope to digital angle.
4. switch technology according to claim 1, it is characterized in that, exchange the direct current signal in the error amplifying circuit employing AC coupling amplifying circuit elimination circuit, error signal KEoSin (θ-φ) high frequency noise is dropped within the loop bandwidth by bandpass filter.
5. switch technology according to claim 1 is characterized in that, the phase demodulation circuit will exchange error signal KEoSin by amplifier and analog switch, and (θ-φ) converts half-wave voltage signal to; Integrating circuit converts half-wave voltage signal to d. c. voltage signal by amplifier and resistance-capacitance network; Voltage-Controlled oscillation circuit adopts the homing position type voltage controlled oscillator, according to the size generation time clock of the direct-flow error voltage of importing; Digital control circuit is made up of up-down counter, data latching and logic control circuit, and it produces digital angle signal φ under the control of clock pulse signal.
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| CN101789757A (en) * | 2010-03-12 | 2010-07-28 | 连云港杰瑞电子有限公司 | Digital conversion method of differential synchro/rotary transformer of singlechip |
| CN101789757B (en) * | 2010-03-12 | 2013-03-20 | 连云港杰瑞电子有限公司 | Digital conversion method of differential synchro/rotary transformer signal of singlechip |
| CN101788307B (en) * | 2010-03-31 | 2012-01-11 | 连云港杰瑞电子有限公司 | Signal-digit converter of low-temperature drift rotary transformer |
| CN101788307A (en) * | 2010-03-31 | 2010-07-28 | 连云港杰瑞电子有限公司 | Signal-digit converter of low-temperature drift rotary transformer |
| CN102288207A (en) * | 2011-07-22 | 2011-12-21 | 深圳市航盛电子股份有限公司 | Signal transforming device of rotating transformer |
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| CN102751991A (en) * | 2012-07-30 | 2012-10-24 | 哈尔滨工业大学 | Delta-Sigma modulation principle based digital switching device and method for rotary transformer |
| CN102751991B (en) * | 2012-07-30 | 2015-04-22 | 哈尔滨工业大学 | Delta-Sigma modulation principle based digital switching device and method for rotary transformer |
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| 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 |
| CN104954022A (en) * | 2015-07-17 | 2015-09-30 | 深圳市芯联电子科技有限公司 | Digital converter of rotary transformer and integrating circuit of digital converter |
| CN106385259A (en) * | 2016-10-26 | 2017-02-08 | 连云港杰瑞电子有限公司 | Single chip internal reference shaft angle conversion circuit and method |
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| CN107356268A (en) * | 2017-07-11 | 2017-11-17 | 连云港杰瑞电子有限公司 | A kind of differential converting method of rotary transformer to numeral |
| CN107356268B (en) * | 2017-07-11 | 2020-07-14 | 连云港杰瑞电子有限公司 | Differential conversion method from rotary transformer to digit |
| CN110768672A (en) * | 2019-11-05 | 2020-02-07 | 连云港杰瑞电子有限公司 | Shaft angle conversion circuit and method of single-chip anti-irradiation fully-differential structure |
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| CN110768672B (en) * | 2019-11-05 | 2023-09-26 | 连云港杰瑞电子有限公司 | Axle angle conversion circuit and method of single-chip anti-irradiation fully-differential structure |
| CN110784223B (en) * | 2019-11-05 | 2023-09-26 | 连云港杰瑞电子有限公司 | Shaft angle-digital conversion circuit and method for single-chip digital quadrant segmentation technology |
| CN113848343A (en) * | 2021-09-13 | 2021-12-28 | 中国人民解放军92601部队 | Artillery angle parameter measurement and detection device |
| CN114705117A (en) * | 2022-04-12 | 2022-07-05 | 上海赢双电机有限公司 | Precision testing method for rotary transformer |
| CN114705117B (en) * | 2022-04-12 | 2023-11-07 | 上海赢双电机科技股份有限公司 | Precision testing method for rotary transformer |
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