CN105897250B - A kind of I/F conversion circuit - Google Patents
A kind of I/F conversion circuit Download PDFInfo
- Publication number
- CN105897250B CN105897250B CN201610213816.1A CN201610213816A CN105897250B CN 105897250 B CN105897250 B CN 105897250B CN 201610213816 A CN201610213816 A CN 201610213816A CN 105897250 B CN105897250 B CN 105897250B
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- circuit
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/0175—Coupling arrangements; Interface arrangements
- H03K19/017509—Interface arrangements
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/20—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits characterised by logic function, e.g. AND, OR, NOR, NOT circuits
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
- H03K5/22—Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral
- H03K5/24—Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral the characteristic being amplitude
Abstract
A kind of I/F conversion circuit, including integrating circuit, comparison circuit, Digital Logic control circuit, electronic switching circuit, constant-current source circuit are successively sequentially electrically connected, electronic switching circuit electrically connects integrating circuit again；I.e. integrating circuit, comparison circuit, Digital Logic control circuit, electronic switching circuit form closed loop and electrically connect；Constant-current source electrically connects electric circuit electronics technical switching circuit.Its advantage is that: Digital Logic control circuit uses four times of work clocks as main working frequency, by counting frequency dividing, NOT gate or door Digital Logic shaping, by the clock signal that circuit operating clock signals are processed into high level and low level ratio is 7:1, it is effectively reduced the nonlinearity erron that switch work imperfection introduces, achievees the purpose that non-liner revision；Conversion circuit constant current source utilization rate is effectively improved, it rises to 87.5% by 50%；Input range can significantly improve.It is widely used in the multiple fields such as space flight, aviation, inertial navigation, petroleum, building, and potential demand amount is larger, has huge economical, societal benefits.
Description
Technical field
The invention belongs to signal conversion circuit manufacturing fields, and in particular to a kind of I/F conversion circuit.
Background technique
I/F conversion circuit is one of the Primary Component in inertial navigation system, it can be by accelerometer output current signal
Linear is converted to the identifiable digital signal of computer, and the conversion accuracy of I/F conversion circuit determines the precision of inertial navigation,
Its importance is increasingly understood by people, is paid attention to.Digital Logic control circuit is the important composition portion of I/F conversion circuit
Point, Digital Logic control mode directly affects the conversion accuracy of I/F conversion circuit.I/F conversion circuit in the prior art exists
Following disadvantage: the conversion accuracy up to 1 × 10 of thick-film hybrid integration I/F conversion circuit-4Magnitude, constant current source utilization rate can only reach
To 50%, constant current source utilization rate is low, input range is small, conversion accuracy is relatively low, cannot fully meet Aeronautics and Astronautics system height collection
Cheng Du, high-end inertial navigation system field needs.
Summary of the invention
The technical problems to be solved by the present invention are: overcome the deficiencies of the prior art and provide a kind of constant current source utilization rate it is high,
The I/F conversion circuit that input range is big, conversion accuracy is high.
The technical solution adopted by the present invention to solve the technical problems is: a kind of I/F conversion circuit, it is characterised in that: packet
Include an integrating circuit, a comparison circuit, a Digital Logic control circuit, an electronic switching circuit, a constant-current source circuit, the product
Parallel circuit, comparison circuit, Digital Logic control circuit, electronic switching circuit successively sequentially electrically connect, the electronic switching circuit
The integrating circuit is electrically connected again；Also that is, the integrating circuit, comparison circuit, Digital Logic control circuit, electronic switching circuit
Closed loop is formed to electrically connect；The constant-current source electrically connects the electric circuit electronics technical switching circuit.
Preferably, the integrating circuit includes an integral amplifier, an integrating capacitor, an expansion current circuit；The integral amplifier,
Integrating capacitor, expansion current circuit successively sequentially electrically connect.
Preferably, the comparison circuit compares including comparison voltage setting circuit, a positive channel comparator, a negative channel
Device, the comparison voltage setting circuit electrically connect the positive channel comparator, negative channel comparator respectively；The expansion current circuit electricity
Couple the comparison voltage setting circuit.
Preferably, the Digital Logic control circuit include a counter, a reverser, one or door, a prime trigger,
One with door, a rear class trigger, the counter, reverser or door, prime trigger, with door, rear class trigger successively sequence
It electrically connects；The positive channel comparator, negative channel comparator are electrically connected with the prime trigger respectively；The rear class trigger
Electrically connect the electronic switching circuit.
Preferably, the constant-current source circuit includes a positive current constant current reset circuit, a negative current constant current reset circuit, institute
State positive current constant current reset circuit, negative current constant current reset circuit electrically connects the electronic switching circuit respectively.
Preferably, the positive current constant current reset circuit includes that first voltage reference circuit, first voltage follow amplifier,
One sampling resistor network, the first voltage reference circuit, first voltage follow amplifier, the first sampling resistor network successively sequence
It electrically connects；The negative current constant current reset circuit includes that second voltage reference circuit, second voltage follow amplifier, the second sampling electricity
Network is hindered, the second voltage reference circuit, second voltage follow amplifier, the second sampling resistor network successively sequentially to electrically connect；
First sampling resistor network, the second sampling resistor network electrically connect the electronic switching circuit respectively.
Preferably, the electronic switching circuit is four-way simulant electronic switch.
Preferably, the comparison voltage setting circuit is that circuit is arranged in electric resistance partial pressure type voltage.
Compared with prior art, the beneficial effects of the present invention are: the Digital Logic control circuit 3 in the present invention uses four
Times work clock is believed circuit work clock by counting frequency dividing, NOT gate or door Digital Logic shaping as main working frequency
Number it is processed into high level and clock signal that low level ratio is 7:1, Digital Logic control circuit 3 uses wide triggering mode,
The control mode puts capable reset into using the low level (slot pulling time) in each clock cycle 1/8 is split, makes switch parameter
At error account for feedback charge ratio it is identical, can be effectively reduced switch work imperfection introduce nonlinearity erron, reach
To the purpose of non-liner revision；The control model of application can effectively reduce the conversion of traditional flip-flop mode control circuit bring and miss
I/F conversion accuracy can be improved an order of magnitude by difference；The work clock high level and low level ratio of its control model are 7:1,
And traditional flip-flop mode high level and low level ratio are 1:1, so, the present invention can effectively improve conversion circuit constant-current source
Utilization rate, it rises to 87.5% by 50%；Simultaneously in the identical situation of application constant-current source, input range can be significantly improved.This
Invention is the crystallization of thick film circuit technique, Digital Logic control chip circuit technological synthesis utilization, high constant current source utilization rate, height
The features such as conversion accuracy, wide range, can widen the application field of the product significantly, and the relevant technologies of the project are succeeded in developing, will
Widen the application range of thick-film hybrid integration I/F conversion circuit.It not only can be widely used in space flight, aviation, inertial navigation
Equal fields, and more and more apply in multiple civil fields such as petroleum, building, potential demand amount is larger, has huge
Social benefit and economic benefit.
Detailed description of the invention
Fig. 1 is the circuit block diagram of the embodiment of the present invention.
In the figure, it is marked as
1, integrating circuit；11, amplifier is integrated；12, integrating capacitor；13, expand current circuit；2, comparison circuit；
21, circuit is arranged in comparison voltage；22, positive channel comparator；23, negative channel comparator；3, Digital Logic control electricity
Road；31, counter；32, phase inverter；33 or door；34, prime trigger；35 and door；36, rear class trigger；
4, electronic switching circuit；5, constant-current source circuit；51, positive current constant-current source；511, first voltage reference circuit；
512, first voltage follows amplifier；513, the first sampling resistor network；52, negative current constant current reset circuit；
521, second voltage reference circuit；522, second voltage follows amplifier；523, the second sampling resistor network.
Specific embodiment
Embodiment with reference to the accompanying drawing is described further the present invention:
Embodiment one
As shown in Figure 1, a kind of I/F conversion circuit, including integrating circuit 1, comparison circuit 2, Digital Logic control circuit 3,
Electronic switching circuit 4, constant-current source circuit 5, integrating circuit 1, comparison circuit 2, Digital Logic control circuit 3, electronic switching circuit 4
It successively sequentially electrically connects, electronic switching circuit 4 electrically connects integrating circuit 5 again；Also that is, integrating circuit 1, comparison circuit 2, number are patrolled
Collect control circuit 3, electronic switching circuit 4 forms closed loop and electrically connects；Constant-current source 5 electrically connects electronic switching circuit 4；
Integrating circuit 1 include integral amplifier 11, integrating capacitor 12, expand current circuit 13, integral amplifier 11, integrating capacitor 12,
Expand current circuit 13 successively sequentially to electrically connect；Comparison circuit 2 includes comparison voltage setting circuit 21, positive channel comparator 22, bears and lead to
Road comparator 23, comparison voltage setting circuit 21 electrically connect positive channel comparator 22, negative channel comparator 23 respectively；Integrating circuit
Expansion current circuit 11 in 1 electrically connects the setting circuit 21 of the comparison voltage in comparison circuit 2；Digital Logic control circuit 3 includes meter
Number devices 31, reverser 32 or door 33, prime trigger 34, with door 35, rear class trigger 36, counter 31, reverser 32 or
Door 33, prime trigger 34 are successively sequentially electrically connected with door 35, rear class trigger 36；Positive channel comparator in comparison circuit 2
22, negative channel comparator 23 is electrically connected with the prime trigger 34 in Digital Logic control circuit 3 respectively；Digital Logic control electricity
Rear class trigger 36 in road 3 electrically connects electronic switching circuit 4；
Constant-current source circuit 5 includes positive current constant current reset circuit 51, negative current constant current reset circuit 52, and positive current constant current is multiple
Position circuit 51, negative current constant current reset circuit 52 electrically connect electric circuit electronics technical switching circuit respectively；Positive current constant current reset circuit 51
Amplifier 512, the first sampling resistor network 513, first voltage benchmark are followed including first voltage reference circuit 511, first voltage
Circuit 511, first voltage follow amplifier 512, the first sampling resistor network 513 successively sequentially to electrically connect；Negative current constant current resets
Circuit 52 follows amplifier 522, the second sampling resistor network 523, the second electricity including second voltage reference circuit 521, second voltage
Pressure reference circuit 521, second voltage follow amplifier 522, the second sampling resistor network 523 successively sequentially to electrically connect；First sampling
Resistor network 513, the second sampling resistor network 523 electrically connect the electronic switching circuit 4 respectively.Electronic switching circuit 4 is four
Channel analogy electronic switch；It is that circuit is arranged in electric resistance partial pressure type voltage that circuit 21, which is arranged, in comparison voltage.
Integrating circuit 1 is to ensure that the stabilization of circuit integral work using high input impedance amplifier and accurate integrating capacitor
Property；Positive channel comparator 22, negative channel comparator 23 select high-precision, low imbalance comparator；Digital Logic control circuit 3 is abandoned
Conventional digital controls chip and triggers mode, can significantly improve the conversion accuracy of I/F conversion circuit, reduce turn that electronic switch introduces
The utilization rate changed error, clock utilization can be significantly improved, improve constant-current source.Constant-current source circuit 5 selects High Precision Low Temperature drift electricity
It presses benchmark and High Precision Low Temperature to float precision resistance network, ensure that the conversion accuracy and temperature characterisitic of circuit.
I/F conversion circuit scale factory non-linearity is the most important technical indicator of circuit, and it is more for introducing the factor of error
Aspect, most important factor is the imperfection of electronic switch circuit for working.To improve circuit conversion precision, reduces or evade
Electronic switching circuit 4 work imperfection introduce error, converted using charge balance equation, charge balance be input current and by
What the time tune bandwidth signals that Digital Logic control circuit 3 controls the connection feedback equalization reset constant-current source of electronic switching circuit 4 were realized,
In 4 make and break process transition period of electronic switching circuit, since the intrinsic switching delay time of switching device causes output waveform
Edge distortion, so cause the overshoot or reduction of balancing charge, the time of balancing charge is wide when input current different due to correspondence
Degree is different, and balancing charge by starting along be distorted formed charge variation amount be it is fixed, for different input currents, open
The ratio for closing feedback charge shared by error caused by parameter is different, the nonlinearity erron for so causing I/F to convert.Counter 31 is right
Clock signal clk is divided, and forms waveform convertion circuit by NOT gate and/or 33 circuit of door, generates transformation working clock frequency
CLK/4, high level and low level ratio are that 7:1 is used for linear amendment, and Digital Logic control circuit 3 uses wide triggering side
Formula, the control mode put capable reset into using the low level (slot pulling time) in each clock cycle 1/8 is split, make switch parameter
Caused by error account for feedback charge ratio it is identical, as long as guarantee switch resetting time long enough, each feedback cycle waveform
All be it is identical, can reach the purpose of non-liner revision, the conversion accuracy of I/F conversion circuit can be significantly improved.
The course of work and working principle of the invention is as follows:
As shown in Figure 1, carrying out principles illustrated by taking positive current inputs as an example.Integrating circuit 1 is by the positive current of input to integral
Capacitor 12 is integrated, which is integral charging process, and integral output end output voltage gradually decreases.Integrate the voltage of output
Be reduced to comparison circuit 2 compare setting voltage value when, positive channel comparator 22 is flipped, comparator output overturn by high level
To low level, comparator exports the input signal as Digital Logic control circuit 3, Digital Logic control circuit 3 one outputs
End is as the positive channel frequence output of circuit, control signal of another output end as electronic switching circuit 4, by electronic switching circuit
4 are converted on state by off-state, and the electric current of negative current constant current reset circuit 52 is applied to the input of integrating circuit 1
End, because constant current source current is greater than input current, integrating circuit 1 enters reverse integral state, which is integral discharge process, makes
1 output voltage of integrating circuit gradually rises, after voltage value is arranged in the comparison that output voltage reaches comparison circuit 2, comparison circuit 2
It is flipped, the output of Digital Logic control circuit 3 is flipped, and electronic switching circuit 4 is made to be transformed into disconnection shape from state
State is isolated by constant current source current, and integrating circuit 1 is made to rework in charged state.The above cycling is repeated, electric current frequency is formed
Rate conversion.The transformational relation of output frequency and input current are as follows: FO=KIin.
Negative current working principle state and positive current work are consistent.
More than, it is only presently preferred embodiments of the present invention, is not that the invention has other forms of limitations, it is any ripe
Know the equivalent reality that professional and technical personnel was changed or be modified as equivalent variations possibly also with the technology contents of the disclosure above
Apply example.But without departing from the technical solutions of the present invention, to the above embodiments according to the technical essence of the invention
Any simple modification, equivalent variations and remodeling, still fall within the protection scope of technical solution of the present invention.
Claims (3)
1. a kind of I/F conversion circuit, it is characterised in that: including an integrating circuit, a comparison circuit, Digital Logic control electricity
Road, an electronic switching circuit, a constant-current source circuit, the integrating circuit, comparison circuit, Digital Logic control circuit, electronic cutting
Powered-down road successively sequentially electrically connects, and the electronic switching circuit electrically connects the integrating circuit again；Also that is, the integrating circuit,
Comparison circuit, Digital Logic control circuit, electronic switching circuit form closed loop and electrically connect；The constant-current source circuit electrically connects described
Electronic switching circuit；
The integrating circuit includes an integral amplifier, an integrating capacitor, an expansion current circuit；The integral amplifier, integrating capacitor, expansion
Current circuit successively sequentially electrically connects；
The comparison circuit includes that circuit, a positive channel comparator, a negative channel comparator, the comparison is arranged in a comparison voltage
Voltage-setting circuitry electrically connects the positive channel comparator, negative channel comparator respectively；
The expansion current circuit electrically connects the comparison voltage setting circuit；
After the Digital Logic control circuit is including a counter, a reverser, one or door, a prime trigger, one and door, one
Grade trigger, the counter, reverser or door, prime trigger are successively sequentially electrically connected with door, rear class trigger；
The positive channel comparator, negative channel comparator are electrically connected with the prime trigger respectively；
The rear class trigger electrically connects the electronic switching circuit；
The constant-current source circuit includes a positive current constant current reset circuit, a negative current constant current reset circuit, and the positive current is permanent
Stream reset circuit, negative current constant current reset circuit electrically connect the electronic switching circuit respectively；
The positive current constant current reset circuit includes that first voltage reference circuit, first voltage follow amplifier, the first sampling resistor
Network, the first voltage reference circuit, first voltage follow amplifier, the first sampling resistor network successively sequentially to electrically connect；
The negative current constant current reset circuit includes that second voltage reference circuit, second voltage follow amplifier, the second sampling resistor
Network, the second voltage reference circuit, second voltage follow amplifier, the second sampling resistor network successively sequentially to electrically connect；
First sampling resistor network, the second sampling resistor network electrically connect the electronic switching circuit respectively.
2. I/F conversion circuit according to claim 1, it is characterised in that: the electronic switching circuit is four-way simulation
Electronic switch.
3. I/F conversion circuit according to claim 2, it is characterised in that: the comparison voltage setting circuit is resistance point
Pressure type voltage-setting circuitry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610213816.1A CN105897250B (en) | 2016-04-08 | 2016-04-08 | A kind of I/F conversion circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610213816.1A CN105897250B (en) | 2016-04-08 | 2016-04-08 | A kind of I/F conversion circuit |
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| CN105897250A CN105897250A (en) | 2016-08-24 |
| CN105897250B true CN105897250B (en) | 2019-04-16 |
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| CN201610213816.1A Active CN105897250B (en) | 2016-04-08 | 2016-04-08 | A kind of I/F conversion circuit |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108693401A (en) * | 2018-07-12 | 2018-10-23 | 湖南科众兄弟科技有限公司 | The low power consumption high-precision circuit of pulse is obtained by current measurement |
| CN108900194A (en) * | 2018-09-26 | 2018-11-27 | 北方电子研究院安徽有限公司 | A kind of power frequency conversion circuit that programmable multi-threshold compares |
| CN109708669B (en) * | 2019-02-28 | 2020-10-02 | 重庆理工大学 | Accelerometer signal processing system and method |
| CN110350785A (en) * | 2019-06-26 | 2019-10-18 | 青岛航天半导体研究所有限公司 | Multichannel integrated current frequency converter |
| CN110471484B (en) * | 2019-08-23 | 2021-05-25 | 西安微电子技术研究所 | Voltage reference source circuit and application thereof in shunt type I/F conversion circuit |
| CN110572157B (en) * | 2019-08-30 | 2021-04-27 | 中勍科技有限公司 | Temperature compensation method for I/F conversion circuit board |
| CN110541792B (en) * | 2019-09-27 | 2020-09-15 | 青岛航天半导体研究所有限公司 | Power generation device installation method based on gyroscope automatic navigation system |
| CN110868215B (en) * | 2019-12-10 | 2024-02-09 | 中国电子科技集团公司第四十三研究所 | Self-adaptive control high-precision current/frequency conversion circuit |
| CN111638744B (en) * | 2020-04-30 | 2022-05-24 | 北京航天时代光电科技有限公司 | Current frequency conversion circuit |
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| CN102539831A (en) * | 2012-02-17 | 2012-07-04 | 北京航天自动控制研究所 | Signal conversion device for accelerometer in strapdown inertial navigation system |
| CN202853621U (en) * | 2012-08-24 | 2013-04-03 | 青岛航天半导体研究所有限公司 | Signal processing circuit of inertial navigation system |
| CN204854755U (en) * | 2015-08-21 | 2015-12-09 | 西安博航电子有限公司 | Dynamic tuned gyroscope appearance control circuit |
| CN205139170U (en) * | 2015-11-06 | 2016-04-06 | 青岛航天半导体研究所有限公司 | Accelerometer servo circuit |
| CN205657674U (en) * | 2016-04-08 | 2016-10-19 | 青岛航天半导体研究所有限公司 | IF converting circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2526508A (en) * | 2014-02-27 | 2015-12-02 | Atlantic Inertial Systems Ltd | Inertial navigation system |
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2016
- 2016-04-08 CN CN201610213816.1A patent/CN105897250B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102539831A (en) * | 2012-02-17 | 2012-07-04 | 北京航天自动控制研究所 | Signal conversion device for accelerometer in strapdown inertial navigation system |
| CN202853621U (en) * | 2012-08-24 | 2013-04-03 | 青岛航天半导体研究所有限公司 | Signal processing circuit of inertial navigation system |
| CN204854755U (en) * | 2015-08-21 | 2015-12-09 | 西安博航电子有限公司 | Dynamic tuned gyroscope appearance control circuit |
| CN205139170U (en) * | 2015-11-06 | 2016-04-06 | 青岛航天半导体研究所有限公司 | Accelerometer servo circuit |
| CN205657674U (en) * | 2016-04-08 | 2016-10-19 | 青岛航天半导体研究所有限公司 | IF converting circuit |
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