CN105897250A - I/F conversion circuit - Google Patents
I/F conversion circuit Download PDFInfo
- Publication number
- CN105897250A CN105897250A CN201610213816.1A CN201610213816A CN105897250A CN 105897250 A CN105897250 A CN 105897250A CN 201610213816 A CN201610213816 A CN 201610213816A CN 105897250 A CN105897250 A CN 105897250A
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- digital logic
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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
An I/F conversion circuit comprises an integrating circuit, a comparison circuit, a digital logic control circuit, an electronic switch circuit and a constant current source circuit which are connected orderly and electrically. The electronic switch circuit is also connected with the integrating circuit electrically, namely, the integrating circuit, the comparison circuit, the digital logic control circuit and the electronic switch circuit form the closed-loop electric connection, and the constant current source circuit is connected with the electronic switch circuit electrically. The advantages of the I/F conversion circuit are that: the digital logic control circuit adopts four times of work clock as a main working frequency, and processes the circuit work clock signals into the clock signals of which the high level and low level proportion is 7:1 by the counting frequency division, NOT gate and or gate digital logic shaping, thereby effectively reducing a non-linear error introduced by the switch work imperfection, and achieving a nonlinear correction purpose; the constant current source utilization rate of the conversion circuit is effectively improved from 50% to 87.5%; an input range can be improved obviously; the I/F conversion circuit is widely used in a plurality of fields, such as aerospace, aviation, inertial navigation, petroleum, building, etc., has more potential demands, and has huge economic and social benefits.
Description
Technical field
The invention belongs to signaling conversion circuit and manufacture field, be specifically related to a kind of I/F change-over circuit.
Background technology
I/F change-over circuit is one of Primary Component in inertial navigation system, linear for accelerometer output current signal can be converted to the discernible digital signal of computer by it, the conversion accuracy of I/F change-over circuit determines the precision of inertial navigation, and its importance is the most increasingly understood by people, payes attention to.Digital Logic control circuit is the important component part of I/F change-over circuit, and Digital Logic control mode directly affects the conversion accuracy of I/F change-over circuit.I/F change-over circuit of the prior art has a disadvantage in that the conversion accuracy up to 1 × 10 of thick-film hybrid integration I/F change-over circuit-4Magnitude, constant-current source utilization rate can only achieve 50%, and constant-current source utilization rate is low, input range is little for it, conversion accuracy is on the low side, it is impossible to fully meet Aeronautics and Astronautics system high integration, the needs in high-end inertial navigation system field.
Summary of the invention
The technical problem to be solved is: overcome the deficiencies in the prior art, it is provided that the I/F change-over circuit that a kind of constant-current source utilization rate is high, input range is big, conversion accuracy is high.
The technical solution adopted for the present invention to solve the technical problems is: a kind of I/F change-over circuit, it is characterized in that: include an integrating circuit, a comparison circuit, a Digital Logic control circuit, an electronic switching circuit, a constant-current source circuit, described integrating circuit, comparison circuit, Digital Logic control circuit, electronic switching circuit order successively electrically connects, and described electronic switching circuit electrically connects described integrating circuit again；That is, described integrating circuit, comparison circuit, Digital Logic control circuit, electronic switching circuit form closed loop and electrically connect；Described constant-current source electrically connects described electric circuit electronics technical on-off circuit.
Preferably, described integrating circuit includes an integration amplifier, an integrating capacitor, an expansion current circuit；Described integration amplifier, integrating capacitor, expansion current circuit order successively electrically connects.
Preferably, described comparison circuit includes that one compares voltage-setting circuitry, a positive passage comparator, a negative passage comparator, and the described voltage-setting circuitry that compares electrically connects described positive passage comparator, negative passage comparator respectively；Described expansion current circuit electrically connects and described compares voltage-setting circuitry.
Preferably, described Digital Logic control circuit includes that an enumerator, a reverser, one or door, a prime trigger, one and door, a rear class trigger, described enumerator, reverser or door, prime trigger electrically connect with door, rear class trigger successively order；Described positive passage comparator, negative passage comparator electrically connect with described prime trigger respectively；Described rear class trigger electrically connects described electronic switching circuit.
Preferably, described constant-current source circuit includes a positive current constant current reset circuit, a negative current constant current reset circuit, and described positive current constant current reset circuit, negative current constant current reset circuit electrically connect described electronic switching circuit respectively.
Preferably, described positive current constant current reset circuit includes the first voltage reference circuit, the first voltage follow amplifier, the first sampling resistor network, and described first voltage reference circuit, the first voltage follow amplifier, the first sampling resistor network order successively electrically connects；Described negative current constant current reset circuit includes the second voltage reference circuit, the second voltage follow amplifier, the second sampling resistor network, and described second voltage reference circuit, the second voltage follow amplifier, the second sampling resistor network order successively electrically connects；First sampling resistor network, the second sampling resistor network electrically connect described electronic switching circuit respectively.
Preferably, described electronic switching circuit is four-way simulant electronic switch.
Preferably, the described voltage-setting circuitry that compares is that electric resistance partial pressure type voltage arranges circuit.
Compared with prior art, the invention has the beneficial effects as follows: the Digital Logic control circuit 3 in the present invention have employed four times of work clocks as main operating frequency, divided by counting, not gate, or door Digital Logic shaping, circuit operating clock signals being processed into high level with low level ratio is the clock signal of 7:1, Digital Logic control circuit 3 uses wide triggering mode, this control mode utilizes and puts horizontal reset into the low level (slot pulling time) of each clock cycle 1/8 is split, the ratio that the error making switch parameter cause accounts for feedback charge is identical, the nonlinearity erron that switch imperfection introduces can be effectively reduced, reach the purpose of non-liner revision；The control model of application can effectively reduce the transformed error that traditional flip-flop mode control circuit brings, and I/F conversion accuracy can be improved an order of magnitude；The work clock high level of its control model and low level ratio are 7:1, and traditional flip-flop pattern high level and low level ratio are 1:1, so, the present invention can be effectively improved change-over circuit constant-current source utilization rate, and it is risen to 87.5% by 50%；Simultaneously in the case of application constant-current source is identical, input range can significantly improve.The present invention is thick film circuit technique, the crystallization of Digital Logic control chip circuit engineering integrated use, the features such as its high constant-current source utilization rate, high conversion accuracy, wide range can widen the application of this product significantly, succeeding in developing of the correlation technique of this project, will widen the range of application of thick-film hybrid integration I/F change-over circuit.It not only can be widely used in the fields such as space flight, aviation, inertial navigation, and more and more applies at multiple civil area such as oil, building, and potential demand amount is relatively big, has huge Social benefit and economic benefit.
Accompanying drawing explanation
Fig. 1 is the circuit block diagram of the embodiment of the present invention.
Figure is labeled as:
1, integrating circuit；11, integration amplifier；12, integrating capacitor；13, current circuit is expanded；2, comparison circuit；
21, voltage-setting circuitry is compared；22, positive passage comparator；23, negative passage comparator；3, Digital Logic control circuit；31, enumerator；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, the first voltage reference circuit；
512, the first voltage follow amplifier；513, the first sampling resistor network；52, negative current constant current reset circuit；
521, the second voltage reference circuit；522, the second voltage follow amplifier；523, the second sampling resistor network.
Detailed description of the invention
Embodiment below in conjunction with the accompanying drawings, is described further the present invention:
Embodiment one
As shown in Figure 1, a kind of I/F change-over 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 order successively electrically connects, and electronic switching circuit 4 electrically connects integrating circuit 5 again；That is, integrating circuit 1, comparison circuit 2, Digital Logic control circuit 3, electronic switching circuit 4 form closed loop and electrically connect；Constant-current source 5 electrically connects electronic switching circuit 4；
Integrating circuit 1 includes integration amplifier 11, integrating capacitor 12, expands current circuit 13, and integration amplifier 11, integrating capacitor 12, expansion current circuit 13 order successively electrically connect；Comparison circuit 2 includes comparing voltage-setting circuitry 21, positive passage comparator 22, negative passage comparator 23, compares voltage-setting circuitry 21 and electrically connects positive passage comparator 22, negative passage comparator 23 respectively；The current circuit 11 that expands in integrating circuit 1 electrically connects the comparison voltage-setting circuitry 21 in comparison circuit 2；Digital Logic control circuit 3 includes that enumerator 31, reverser 32 or door 33, prime trigger 34 and door 35, rear class trigger 36, enumerator 31, reverser 32 or door 33, prime trigger 34 electrically connect with door 35, rear class trigger 36 successively order；Positive passage comparator 22, negative passage comparator 23 in comparison circuit 2 electrically connect with the prime trigger 34 in Digital Logic control circuit 3 respectively；Rear class trigger 36 in Digital Logic control circuit 3 electrically connects electronic switching circuit 4；
Constant-current source circuit 5 includes that positive current constant current reset circuit 51, negative current constant current reset circuit 52, positive current constant current reset circuit 51, negative current constant current reset circuit 52 electrically connect electric circuit electronics technical on-off circuit respectively；Positive current constant current reset circuit 51 includes first voltage reference circuit the 511, first voltage follow amplifier the 512, first sampling resistor network 513, and first voltage reference circuit the 511, first voltage follow amplifier the 512, first sampling resistor network 513 order successively electrically connects；Negative current constant current reset circuit 52 includes second voltage reference circuit the 521, second voltage follow amplifier the 522, second sampling resistor network 523, and second voltage reference circuit the 521, second voltage follow amplifier the 522, second sampling resistor network 523 order successively electrically connects；First sampling resistor network the 513, second sampling resistor network 523 electrically connects described electronic switching circuit 4 respectively.Electronic switching circuit 4 is four-way simulant electronic switch；Relatively voltage-setting circuitry 21 arranges circuit for electric resistance partial pressure type voltage.
Integrating circuit 1 is to use high input impedance amplifier and accurate integrating capacitor, it is ensured that the stability of circuit integration work；Positive passage comparator 22, negative passage comparator 23 select high accuracy, low imbalance comparator；Digital Logic control circuit 3 abandoning tradition digital control chip triggers pattern, can significantly improve the conversion accuracy of I/F change-over circuit, the transformed error of reduction electrical switch introducing, can significantly improve clock utilization, the utilization rate of raising constant-current source.Constant-current source circuit 5 selects High Precision Low Temperature drift voltage reference and High Precision Low Temperature drift precision resistance network, it is ensured that the conversion accuracy of circuit and temperature characterisitic.
I/F change-over circuit scale factory non-linearity is the most important technical specification of circuit, and the factor introducing error is many, and topmost factor is the imperfection of electronic switch circuit for working.For improving circuit conversion precision, reduce or evade electronic switching circuit 4 work imperfection introduce error, employing charge balance equation is changed, charge balance is input current and controlled electronic switching circuit 4 by Digital Logic control circuit 3 and connect time of feedback equalization reset constant-current source and adjust bandwidth signals to realize, at electronic switching circuit 4 make and break process transition period, due to switching delay time that switching device is intrinsic cause output waveform along distortion, so cause crossing punching or reducing of balancing charge, owing to during corresponding different input current, the time width of balancing charge is different, and balancing charge is fixing owing to initiateing along distortion formed change in electrical charge amount, for different input currents, the ratio of feedback charge shared by the error that switch parameter causes is different, so cause the nonlinearity erron that I/F changes.Clock signal clk is divided by enumerator 31, by not gate and or door 33 circuit form waveform translation circuit, generate conversion working clock frequency CLK/4, high level and low level ratio are that 7:1 is for linear correction, Digital Logic control circuit 3 uses wide triggering mode, this control mode utilizes and puts horizontal reset into the low level (slot pulling time) of each clock cycle 1/8 is split, the ratio that the error making switch parameter cause accounts for feedback charge is identical, as long as ensureing switch long enough resetting time, the most each feedback cycle waveform is identical, can reach the purpose of non-liner revision, the conversion accuracy of I/F change-over circuit can be significantly improved.
Work process and the operation principle of the present invention are as follows:
As it is shown in figure 1, carry out principles illustrated as a example by positive current inputs.Integrating capacitor 12 is integrated by integrating circuit 1 by the positive current of input, and this process is integration charging process, and integration outfan output voltage is gradually lowered.nullThe voltage of integration output is reduced to comparison circuit 2 and compares when arranging magnitude of voltage，Positive passage comparator 22 overturns，Comparator output is turned to low level by high level，Comparator output is as the input signal of Digital Logic control circuit 3，3 one outfans of Digital Logic control circuit export as the positive channel frequence of circuit，Another outfan is as the control signal of electronic switching circuit 4，Electronic switching circuit 4 is converted to conducting state by off-state，The electric current of negative current constant current reset circuit 52 is applied to the input of integrating circuit 1，Because constant-current source electric current is more than input current，Integrating circuit 1 enters reverse integral state，This process is integration discharge process，Integrating circuit 1 output voltage is made to gradually rise，When output voltage reach comparison circuit 2 relatively magnitude of voltage is set after，Comparison circuit 2 overturns，Digital Logic control circuit 3 exports and overturns，Electronic switching circuit 4 is made to be transformed into off-state from conducting state，Constant-current source is galvanically isolated，Integrating circuit 1 is made to rework in charged state.Repeat above cycling, form power frequency conversion.Output frequency with the transformational relation of input current is: FO=KIin.
Negative current operation principle state is consistent with positive current work.
Above, being only presently preferred embodiments of the present invention, be not the restriction that the present invention makees other form, any those skilled in the art are changed possibly also with the technology contents of the disclosure above or are modified as the Equivalent embodiments of equivalent variations.But every without departing from technical solution of the present invention content, any simple modification, equivalent variations and remodeling above example made according to the technical spirit of the present invention, still fall within the protection domain of technical solution of the present invention.
Claims (8)
1. an I/F change-over circuit, it is characterized in that: include an integrating circuit, a comparison circuit, a Digital Logic control circuit, an electronic switching circuit, a constant-current source circuit, described integrating circuit, comparison circuit, Digital Logic control circuit, electronic switching circuit order successively electrically connects, and described electronic switching circuit electrically connects described integrating circuit again；That is, described integrating circuit, comparison circuit, Digital Logic control circuit, electronic switching circuit form closed loop and electrically connect；Described constant-current source electrically connects described electric circuit electronics technical on-off circuit.
I/F change-over circuit the most according to claim 1, it is characterised in that: described integrating circuit includes an integration amplifier, an integrating capacitor, an expansion current circuit；Described integration amplifier, integrating capacitor, expansion current circuit order successively electrically connects.
I/F change-over circuit the most according to claim 2, it is characterized in that: described comparison circuit includes that one compares voltage-setting circuitry, a positive passage comparator, a negative passage comparator, and the described voltage-setting circuitry that compares electrically connects described positive passage comparator, negative passage comparator respectively；
Described expansion current circuit electrically connects and described compares voltage-setting circuitry.
I/F change-over circuit the most according to claim 3, it is characterized in that: described Digital Logic control circuit includes that an enumerator, a reverser, one or door, a prime trigger, one and door, a rear class trigger, described enumerator, reverser or door, prime trigger electrically connect with door, rear class trigger successively order；
Described positive passage comparator, negative passage comparator electrically connect with described prime trigger respectively；
Described rear class trigger electrically connects described electronic switching circuit.
I/F change-over circuit the most according to claim 4, it is characterized in that: described constant-current source circuit includes a positive current constant current reset circuit, a negative current constant current reset circuit, described positive current constant current reset circuit, negative current constant current reset circuit electrically connect described electronic switching circuit respectively.
I/F change-over circuit the most according to claim 5, it is characterized in that: described positive current constant current reset circuit includes the first voltage reference circuit, the first voltage follow amplifier, the first sampling resistor network, described first voltage reference circuit, the first voltage follow amplifier, the first sampling resistor network order successively electrically connects；
Described negative current constant current reset circuit includes the second voltage reference circuit, the second voltage follow amplifier, the second sampling resistor network, and described second voltage reference circuit, the second voltage follow amplifier, the second sampling resistor network order successively electrically connects；
First sampling resistor network, the second sampling resistor network electrically connect described electronic switching circuit respectively.
7. according to the arbitrary described I/F change-over circuit of claim 1 to 6, it is characterised in that: described electronic switching circuit is four-way simulant electronic switch.
I/F change-over circuit the most according to claim 7, it is characterised in that: the described voltage-setting circuitry that compares is that electric resistance partial pressure type voltage arranges circuit.
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 |
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| CN201610213816.1A CN105897250B (en) | 2016-04-08 | 2016-04-08 | A kind of I/F conversion circuit |
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| CN105897250A true CN105897250A (en) | 2016-08-24 |
| CN105897250B 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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Cited By (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 |
| CN109708669A (en) * | 2019-02-28 | 2019-05-03 | 重庆理工大学 | A kind of 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 |
| CN110471484A (en) * | 2019-08-23 | 2019-11-19 | 西安微电子技术研究所 | A kind of voltage reference source circuit and its application in bypass type I/F conversion circuit |
| CN110572157A (en) * | 2019-08-30 | 2019-12-13 | 中勍科技有限公司 | temperature compensation method for I/F conversion circuit board |
| CN110868215A (en) * | 2019-12-10 | 2020-03-06 | 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 |
| CN111638744A (en) * | 2020-04-30 | 2020-09-08 | 北京航天时代光电科技有限公司 | Current frequency conversion circuit |
| CN112128055A (en) * | 2019-09-27 | 2020-12-25 | 青岛航天半导体研究所有限公司 | Power generation control method based on gyroscope automatic navigation system |
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Cited By (13)
| 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 |
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| CN109708669B (en) * | 2019-02-28 | 2020-10-02 | 重庆理工大学 | Accelerometer signal processing system and method |
| CN109708669A (en) * | 2019-02-28 | 2019-05-03 | 重庆理工大学 | A kind of 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 |
| CN110471484A (en) * | 2019-08-23 | 2019-11-19 | 西安微电子技术研究所 | A kind of voltage reference source circuit and its application in bypass type I/F conversion circuit |
| 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 |
| CN110572157A (en) * | 2019-08-30 | 2019-12-13 | 中勍科技有限公司 | temperature compensation method for I/F conversion circuit board |
| CN112128055A (en) * | 2019-09-27 | 2020-12-25 | 青岛航天半导体研究所有限公司 | Power generation control method based on gyroscope automatic navigation system |
| CN110868215A (en) * | 2019-12-10 | 2020-03-06 | 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 |
| 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 |
| CN111638744A (en) * | 2020-04-30 | 2020-09-08 | 北京航天时代光电科技有限公司 | 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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