CN206379940U - A kind of high-precision zero offset adjustment R/D converters - Google Patents
A kind of high-precision zero offset adjustment R/D converters Download PDFInfo
- Publication number
- CN206379940U CN206379940U CN201621480448.9U CN201621480448U CN206379940U CN 206379940 U CN206379940 U CN 206379940U CN 201621480448 U CN201621480448 U CN 201621480448U CN 206379940 U CN206379940 U CN 206379940U
- Authority
- CN
- China
- Prior art keywords
- circuit
- input
- signal
- output end
- resistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Landscapes
- Networks Using Active Elements (AREA)
- Amplifiers (AREA)
Abstract
The utility model is related to a kind of high-precision zero offset adjustment R/D converters, including the first signal processing circuit and secondary signal process circuit, described first, the input of binary signal process circuit is the signal input part of rotary transformer, its output end respectively with adaptive circuit, sector function generator and error formation circuit input end are connected, the output end of sector function generator and error formation circuit is successively through the first bandpass filter, phase discriminator, integral filter circuit, the input that voltage controlled oscillator latches forward-backward counter with tri-state is connected, the sector function generator and error formation circuit latch forward-backward counter interactive connection with tri-state, the input of second bandwidth-limited circuit is connected with the output end of voltage controlled oscillator.The utility model can be adjusted and compensate to the asymmetry for inputting signals of rotating transformer, effective to correct the deviation that cosine and sine signal is brought due to external environment condition, improve circuit output precision.
Description
Technical field
The utility model is related to R/D switch technologies field, and in particular to a kind of high-precision zero offset adjustment R/D conversions
Device.
Background technology
R/D converters are mainly by the position signalling of simulation（Signals of rotating transformer）It is converted into data signal, extensive use
In the army and the people's electronic system such as space flight, aviation, ship, weapons, electronics.Because rotary transformer zero-bit has error, rotation becomes
Depressor output just, cosine signal non complete symmetry, will be deteriorated using conversion accuracy during R/D converters, or even beyond requiring model
Enclose, be unsatisfactory for some needing the occasion of high precision collecting.
Utility model content
The purpose of this utility model is that providing a kind of high-precision zero offset adjusts R/D converters, can be by input not
To into just, cosine signal carry out zero offset adjustment, be converted into highest 16 parallel binary output, meet space flight, aviation, ship
The high-precision Angle-domain imaging system such as oceangoing ship, weapons is used.
To achieve the above object, the utility model employs following technical scheme：
A kind of high-precision zero offset adjustment R/D converters, including the first signal processing circuit, secondary signal processing electricity
Road, the first bandwidth-limited circuit, phase discriminator, integral filtering, voltage controlled oscillator, tri-state latch forward-backward counter, biasing adjustment
The input of circuit and the second bandwidth-limited circuit, first signal processing circuit and secondary signal process circuit becomes for rotation
The signal input part of depressor, input phase of the output end through phase adaptation circuit with phase discriminator of the first signal processing circuit
Even, the output end of secondary signal process circuit is successively through sector function generator and error formation circuit, the first bandpass filtering electricity
Road is connected with the input of phase discriminator, the input phase of the integrated filter circuit of output end and voltage controlled oscillator of phase discriminator
Even, the output end of voltage controlled oscillator is connected with the input that tri-state latches forward-backward counter, and tri-state latches the defeated of forward-backward counter
Go out output end of the end for data signal, the sector function generator and error formation circuit latch forward-backward counter with tri-state and handed over
Connect, the input of second bandwidth-limited circuit is connected with the output end of voltage controlled oscillator, the bias adjustment circuit
Output end be connected with the input of integral filter circuit.
Described high-precision zero offset adjustment R/D converters, first signal processing circuit turns including the first signal
Circuit, the first signal isolation circuit are changed, secondary signal process circuit includes secondary signal change-over circuit, the 3rd signaling conversion circuit
With secondary signal isolation circuit, first signaling conversion circuit, secondary signal change-over circuit and the 3rd signaling conversion circuit
Input is the signal input part of rotary transformer, and the output end of the first signaling conversion circuit is through the first signal isolation circuit and phase
The input of position adaptive circuit is connected, and the output end of secondary signal change-over circuit and the 3rd signaling conversion circuit is through secondary signal
Isolation circuit is connected with the input of sector function generator and error formation circuit.
Described high-precision zero offset adjustment R/D converters, first signaling conversion circuit, secondary signal conversion electricity
Road and the 3rd signaling conversion circuit are made up of operational amplifier Q1, Q2, Q3 respectively, the input of the operational amplifier Q1 and rotation
The excited signal for changing depressor is connected, and its output end is connected with the first signal isolation circuit, the input of the operational amplifier Q2
End is connected with the sinusoidal signal of rotary transformer, and operational amplifier Q3 input is connected with the cosine signal of rotary transformer,
Operational amplifier Q2 and operational amplifier Q3 output end are connected with secondary signal isolation circuit, and the operational amplifier Q3's is anti-
It is connected successively through resistance R9, R13 with its output end to input.
Described high-precision zero offset adjustment R/D converters, the bias adjustment circuit include resistance R16, R17,
R18, one end of the resistance R16 is connected with R17, and resistance R16 and resistance the R17 other end are connected with power supply, and the one of resistance R18
End is connected with the input of integral filter circuit, and its other end is connected at the node between resistance R16 and resistance R17.
Described high-precision zero offset adjustment R/D converters, second bandwidth-limited circuit includes operational amplifier
Q4, the in-phase input end of the operational amplifier Q4 is connected with voltage controlled oscillator, and its reverse input end is through two electric capacity C1 in parallel
It is connected with resistance R14 with its output end, and reverse input end is grounded through resistance R15.
The asymmetry that input signals of rotating transformer can be adjusted for the utility model as shown from the above technical solution
And compensation, it is effective to correct the deviation that cosine and sine signal is brought due to external environment condition, improve output accuracy；Meanwhile, Ke Yiyou
Effect ground carries out the compensation of the error of zero, and error signal is biased into adjustment by circuit operation principle, circuit output is improved
Precision, is that system has safely provided guarantee.
Brief description of the drawings
Fig. 1 is circuit block diagram of the present utility model.
Embodiment
The utility model is described further below in conjunction with the accompanying drawings：
As shown in figure 1, the high-precision zero offset adjustment R/D converters of the present embodiment, including the first signal processing circuit
1st, secondary signal process circuit 2, the first bandwidth-limited circuit 5, phase discriminator 6, integral filtering 7, voltage controlled oscillator 9, tri-state lock
Deposit forward-backward counter 8, bias adjustment circuit and the second bandwidth-limited circuit, the first signal processing circuit 1 and secondary signal processing
The input of circuit 2 is the signal input part of rotary transformer, and the output end of the first signal processing circuit 1 is through phase adaptation electricity
Road 3 is connected with the input of phase discriminator 6, and the output end of secondary signal process circuit 2 is successively through sector function generator and mistake
Difference forms circuit 4, the first bandwidth-limited circuit 5 and is connected with the input of phase discriminator 6, and the output end of phase discriminator 6 is integrated
Filter circuit 7 is connected with the input of voltage controlled oscillator 9, and output end and the tri-state of voltage controlled oscillator 9 latch forward-backward counter 8
Input is connected, and the output end that tri-state latches forward-backward counter 8 is the output end of data signal, sector function generator and error
Form circuit 4 to interconnect with tri-state latch forward-backward counter 8, input and the voltage controlled oscillator 9 of the second bandwidth-limited circuit
Output end be connected, the output end of bias adjustment circuit is connected with the input of integral filter circuit 7.
First signal processing circuit 1 includes the first signaling conversion circuit, the first signal isolation circuit, secondary signal processing electricity
Road 2 includes secondary signal change-over circuit, the 3rd signaling conversion circuit and secondary signal isolation circuit.First signaling conversion circuit,
The input of secondary signal change-over circuit and the 3rd signaling conversion circuit is the signal input part of rotary transformer, and the first signal turns
The output end for changing circuit is connected through the first signal isolation circuit 11 with the input of phase adaptation circuit 3, secondary signal conversion
The output end of circuit and the 3rd signaling conversion circuit is formed through secondary signal isolation circuit 21 with sector function generator and error
The input of circuit 4 is connected.
First signaling conversion circuit, secondary signal change-over circuit and the 3rd signaling conversion circuit are respectively by operational amplifier
Q1, Q2, Q3 are constituted, and operational amplifier Q1 input is connected with excited signal RL, RH of rotary transformer, its output end and the
One signal isolation circuit is connected, and operational amplifier Q2 input is connected with sinusoidal signal S1, S3 of rotary transformer, and computing is put
Big device Q3 input is connected with cosine signal S2, S4 of rotary transformer, and operational amplifier Q2 and operational amplifier Q3's is defeated
Go out end with secondary signal isolation circuit to be connected, operational amplifier Q3 reverse input end is successively through resistance R9, R13 and its output end
It is connected.First signaling conversion circuit, the effect of secondary signal change-over circuit and the 3rd signaling conversion circuit are according to different user
The use difference of rotary transformer and the signal output impedance that causes is different, realize that high impedance is inputted, while by the simulation of input
Signal voltage isolation is converted to the accurate orthogonal signalling VS and VC of two-way.Phase adaptation circuit 3 carries out signal by excitatory input
Processing and adjustment, can improve the accuracy and stability of excited signal.
Sector function generator exchanges error using sector broken line technology with error formation circuit 4 with linear approximation method formation
Function voltage, the timeliness and correctness of the exchange margin of error of circuit formation, determines the conversion accuracy of whole circuit.It is internal
By active filter when tracking loop circuit design, after one integrator of series connection, by phase discriminator 6 make loop turn into second order without
Margin, i.e., the servo loop that static and velocity error is zero so that closed-loop system has sufficiently high sensitivity and stability.
Bipolarity voltage controlled oscillator 9 is special using the resolver-to-angle converter of charge balance method principle and constant-current source Technology design
Use circuit.The DC voltage of input is converted to the pulse signal of circuit work frequency in the ratio of design by circuit, is exported simultaneously
One logic level, indicates the polarity of the DC voltage of input.Bipolarity voltage controlled oscillator 9 is that can whole circuit continuously normal
The key of tracking.
The reversible latching accumulator 8 of tri-state is worked by two eight reversible counting latch using cascade system, while low by eight
Digit counter by selection port SC1, SC2 can convert 2,4,6,8 functions for counting, realize circuit have resolution ratio 10,
12nd, 14,16 programmable technical requirements.
Bias adjustment circuit includes resistance R16, R17, R18, and resistance R16 one end is connected with R17, resistance R16 and resistance
The R17 other end is connected with power supply, and resistance R18 one end is connected with the input of integral filter circuit, and its other end is connected to
At node between resistance R16 and resistance R17.
Second bandwidth-limited circuit includes operational amplifier Q4, operational amplifier Q4 in-phase input end and voltage controlled oscillator
It is connected, its reverse input end is connected through electric capacity C1 and resistance R14 the second bandwidth-limited circuit composed in parallel with its output end, and
Reverse input end is grounded through resistance R15, amplifier Q4 output end external load circuit.
The high-precision zero offset of the present embodiment adjusts the implementation method of R/D converters, comprises the following steps：
S1：The pumping signal that first signal processing circuit 1 produces rotary transformer carries out signal amplification and filters out interference
Feeding phase adaptation circuit 3 afterwards, through phase adaptation circuit 3 by the excited signal voltage of input and the cosine and sine signal of input
It is unified that voltage enters signal on line phase and quadrant, and input to phase discriminator 6 and decomposed simultaneously；
S2：Rotary transformer is produced two-way by secondary signal process circuit 2 to be believed with the sinusoidal signal and cosine of angle change
Number carry out AC signal amplification, and through the first bandpass filter 5 filter out interference after feeding sector function generator and error formed
Circuit 4；
S3：The voltage of precision needed for two-way cosine and sine signal is decomposed into by sector function generator and error formation circuit 4
Signal, and it is sent to phase discriminator 6 by voltage signal progress exchange amplification and after filtering out interference；
S4：Obtained exchange all-view signal is converted into half-wave voltage signal by phase discriminator 6, and the half-wave voltage signal passes through integrating circuit
DC level is obtained after computing, and the pulse produced by Voltage-Controlled oscillation circuit 9 and counting direction signal can into tri-state latch
Inverse counter 8, latches forward-backward counter 8 through tri-state and produces digital angle signal, export digital angle.
The high-precision zero offset adjustment R/D converters of the present embodiment, using three adjustment, are once cosine gain-adjusteds,
Adjusted by R13 resistances, realize that the inherent variability of the cosine and sine signal output become to rotation is compensated, improve measurement accuracy；Two
It is bias-adjusted, in order to which integrator is output as zero when ensureing that input angle signal is equal with data signal, eliminates the defeated of integrator
Enter imbalance and bias current cause the drift of the output signal of voltage controlled oscillator 9, biasing adjustment is constituted by R16, R17, R18,
Ensure when input angle is zero, output digital angle is also zero.Integrator is output as zero simultaneously；Three be signal waveform processing and
Ratio is adjusted, and bandpass filtering is constituted by R14, R15, C1, operational amplifier Q4, and gain tune is carried out by amplifier and proportion resistor
It is whole, that is, capacitance-resistance parameter is adjusted, high fdrequency component is eliminated, signal quality is improved, analog signal output ripple is reduced, output signal is lifted
Voltage uniformity.Signal quality is improved, fine adjustment signal amplitude realizes the high accuracy conversion of output signal voltage.
Embodiment described above is only that preferred embodiment of the present utility model is described, not to this practicality
New scope is defined, on the premise of the utility model design spirit is not departed from, and those of ordinary skill in the art are to this
Various modifications and improvement that the technical scheme of utility model is made, all should fall into the protection of the utility model claims determination
In the range of.
Claims (5)
1. a kind of high-precision zero offset adjustment R/D converters, it is characterised in that：Including the first signal processing circuit, the second letter
Number process circuit, the first bandwidth-limited circuit, phase discriminator, integral filtering, voltage controlled oscillator, tri-state latch forward-backward counter,
The input of bias adjustment circuit and the second bandwidth-limited circuit, first signal processing circuit and secondary signal process circuit
For the signal input part of rotary transformer, the output end of the first signal processing circuit is through phase adaptation circuit and phase discriminator
Input is connected, and the output end of secondary signal process circuit is successively through sector function generator and error formation circuit, first band
Bandpass filter circuit is connected with the input of phase discriminator, the integrated filter circuit of output end of phase discriminator and voltage controlled oscillator
Input is connected, and the output end of voltage controlled oscillator is connected with the input that tri-state latches forward-backward counter, and tri-state latches reversible meter
The output end of number device is the output end of data signal, and the sector function generator and error formation circuit latch reversible with tri-state
Counter is interconnected, and the input of second bandwidth-limited circuit is connected with the output end of voltage controlled oscillator, the biasing
The output end of adjustment circuit is connected with the input of integral filter circuit.
2. high-precision zero offset adjustment R/D converters according to claim 1, it is characterised in that：First signal
Process circuit includes the first signaling conversion circuit and the first signal isolation circuit, and the secondary signal process circuit includes the second letter
Number change-over circuit, the 3rd signaling conversion circuit and secondary signal isolation circuit, first signaling conversion circuit, secondary signal turn
The input for changing circuit and the 3rd signaling conversion circuit is the signal input part of rotary transformer, the first signaling conversion circuit it is defeated
Go out end through the first signal isolation circuit with the input of phase adaptation circuit to be connected, secondary signal change-over circuit and the 3rd signal
The output end of change-over circuit is connected through secondary signal isolation circuit with the input of sector function generator and error formation circuit.
3. high-precision zero offset adjustment R/D converters according to claim 2, it is characterised in that：First signal
Change-over circuit, secondary signal change-over circuit and the 3rd signaling conversion circuit are made up of operational amplifier Q1, Q2, Q3 respectively, described
Operational amplifier Q1 input is connected with the excited signal of rotary transformer, its output end and the first signal isolation circuit phase
Even, the input of the operational amplifier Q2 is connected with the sinusoidal signal of rotary transformer, operational amplifier Q3 input and
The cosine signal of rotary transformer is connected, operational amplifier Q2 and operational amplifier Q3 output end and secondary signal isolation circuit
It is connected, the reverse input end of the operational amplifier Q3 is connected through resistance R9, R13 with its output end successively.
4. high-precision zero offset adjustment R/D converters according to claim 1, it is characterised in that：The biasing adjustment
Circuit includes resistance R16, R17, R18, and one end of the resistance R16 is connected with R17, resistance R16 and resistance the R17 other end and
Power supply is connected, and resistance R18 one end is connected with the input of integral filter circuit, and its other end is connected to resistance R16 and resistance
At node between R17.
5. high-precision zero offset adjustment R/D converters according to claim 1, it is characterised in that：Second band logical
Filter circuit includes operational amplifier Q4, and the in-phase input end of the operational amplifier Q4 is connected with voltage controlled oscillator, and its is reverse
Input is connected through two electric capacity C1 and resistance R14 in parallel with its output end, and reverse input end is grounded through resistance R15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621480448.9U CN206379940U (en) | 2016-12-30 | 2016-12-30 | A kind of high-precision zero offset adjustment R/D converters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621480448.9U CN206379940U (en) | 2016-12-30 | 2016-12-30 | A kind of high-precision zero offset adjustment R/D converters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206379940U true CN206379940U (en) | 2017-08-04 |
Family
ID=59408116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621480448.9U Withdrawn - After Issue CN206379940U (en) | 2016-12-30 | 2016-12-30 | A kind of high-precision zero offset adjustment R/D converters |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206379940U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106656188A (en) * | 2016-12-30 | 2017-05-10 | 中国电子科技集团公司第四十三研究所 | High-precision zero offset adjustment R/D converter and implementation method thereof |
| CN107666321A (en) * | 2017-10-17 | 2018-02-06 | 中国电子科技集团公司第四十三研究所 | D/R converter parallel binary angle code two-way orthogonal signalling conversion equipments |
| CN110595514A (en) * | 2019-09-24 | 2019-12-20 | 中国电子科技集团公司第四十三研究所 | Phase adaptive circuit in rotary-to-digital converter and control method thereof |
-
2016
- 2016-12-30 CN CN201621480448.9U patent/CN206379940U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106656188A (en) * | 2016-12-30 | 2017-05-10 | 中国电子科技集团公司第四十三研究所 | High-precision zero offset adjustment R/D converter and implementation method thereof |
| CN107666321A (en) * | 2017-10-17 | 2018-02-06 | 中国电子科技集团公司第四十三研究所 | D/R converter parallel binary angle code two-way orthogonal signalling conversion equipments |
| CN107666321B (en) * | 2017-10-17 | 2023-10-24 | 中国电子科技集团公司第四十三研究所 | Parallel binary angle code-two-path orthogonal signal conversion device of D/R converter |
| CN110595514A (en) * | 2019-09-24 | 2019-12-20 | 中国电子科技集团公司第四十三研究所 | Phase adaptive circuit in rotary-to-digital converter and control method thereof |
| CN110595514B (en) * | 2019-09-24 | 2021-10-01 | 中国电子科技集团公司第四十三研究所 | Phase adaptive circuit in rotary-to-digital converter and control method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206379940U (en) | A kind of high-precision zero offset adjustment R/D converters | |
| CN105553443B (en) | Weak signal extraction and digital processing system under the conditions of a kind of very noisy | |
| CN100422690C (en) | Angle detection signal processing system | |
| CN205883201U (en) | Move looks ware circuit and MEMS gyroscope | |
| CN102045062B (en) | Digital phase-locked loop based on Cordic algorithm | |
| CN103532556B (en) | A kind of single-chip shaft angle signal is to serial digital signal change-over circuit | |
| CN108562286A (en) | Digital PLL circuit in restructural MEMS gyro number TT＆C system | |
| CN103957007A (en) | Random waveform weak signal detection method and system under low signal to noise ratio | |
| CN101738495B (en) | CORDIC algorithm-based capacitive micro-accelerometer signal detection device | |
| CN204131498U (en) | A kind of phase-locked loop frequency synthesizer | |
| CN104320137A (en) | Phase locking loop frequency synthesizer | |
| CN106533437B (en) | A kind of thin step frequency source circuit in broadband | |
| CN104882886A (en) | LLCL filtering-based active power filter compound control method | |
| US4368432A (en) | Sine wave generator for different frequencies | |
| Lahiri | Low-frequency quadrature sinusoidal oscillators using current differencing buffered amplifiers | |
| CN106656188A (en) | High-precision zero offset adjustment R/D converter and implementation method thereof | |
| CN108398658A (en) | A kind of automatic frequency control apparatus and method | |
| Miller | Inductance formula for a single-layer circular coil | |
| CN117110643A (en) | Rate integrating hemispherical resonant gyro angular rate output method | |
| CN208206150U (en) | Digital PLL circuit in restructural MEMS gyro number TT&C system | |
| CN207399182U (en) | D/R converter parallel binary angles code-two-way orthogonal signalling conversion equipment | |
| CN205693648U (en) | A kind of digital servo-control modulator multiplier for Rb atom frequency marking | |
| CN104660253A (en) | Measuring device with phase-locked loop | |
| CN103888239B (en) | Chaotic circuit composed of RC oscillator and LC resonant loop | |
| CN204515404U (en) | Digital quantizer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170804 Effective date of abandoning: 20230718 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20170804 Effective date of abandoning: 20230718 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |