CN108871633A - The signal conditioning circuit of pressure sensor - Google Patents
The signal conditioning circuit of pressure sensor Download PDFInfo
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- CN108871633A CN108871633A CN201710324073.XA CN201710324073A CN108871633A CN 108871633 A CN108871633 A CN 108871633A CN 201710324073 A CN201710324073 A CN 201710324073A CN 108871633 A CN108871633 A CN 108871633A
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- operational amplifier
- input terminal
- pressure sensor
- signal
- inverting input
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/26—Auxiliary measures taken, or devices used, in connection with the measurement of force, e.g. for preventing influence of transverse components of force, for preventing overload
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/18—Measuring force or stress, in general using properties of piezo-resistive materials, i.e. materials of which the ohmic resistance varies according to changes in magnitude or direction of force applied to the material
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/02—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning
- G01L9/025—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning with temperature compensating means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/02—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning
- G01L9/06—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning of piezo-resistive devices
- G01L9/065—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning of piezo-resistive devices with temperature compensating means
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/45—Differential amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/68—Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The present invention provides a kind of signal conditioning circuits of pressure sensor.The signal conditioning circuit of the pressure sensor includes pressure sensor core (1) and concatenated first operational amplifier (2) and second operational amplifier (3), the differential signal positive output end of pressure sensor core (1) is connected to the non-inverting input terminal of the first operational amplifier (2), the differential signal negative output terminal of pressure sensor core (1) is connected to the non-inverting input terminal of second operational amplifier (3), the inverting input terminal of first operational amplifier (2) is connected to the feedback end of second operational amplifier (3), the output end of first operational amplifier (2) is signal output end.The signal conditioning circuit of pressure sensor according to the present invention, with solve in the prior art pressure signal by Digital ASIC progress signal condition, caused by high cost, the problem of precision drift, higher output ripple and noise.
Description
Technical field
The present invention relates to pressure sensing arts, more particularly to a kind of signal conditioning circuit of pressure sensor.
Background technique
The collection process of pressure sensor needs to be converted to pressure signal the electric signal easily transmitted with processing, usual pressure
After the tiny signal of sensor output need to carry out signal condition by subsequent circuit, the pressure detecting that can just be met the requirements
Electric signal.Signal condition includes temperature error compensation, offset compensation, the technologies such as signal amplification and translation.Such as most of sensings
The sensitive original part of device is all made of metal or semiconductor material, and characteristic and environment temperature have close relationship, general micro electronmechanical
The resistor bridge temperature drift coefficient of system (Micro-Electro-Mechanical System, MEMS) sensor is about 0.34%/
DEG C, and in practical applications, since the operating ambient temperature variation of pressure sensor is again larger, this just brings mistake to measurement result
Difference, so needing to pressure sensor plus temperature error compensation.
In the prior art, as shown in Figure 1, the output signal of sensor can be conveyed to Digital ASIC
The programmable amplifier of (Application Specific Integrated Circuits, ASIC) chip
Then and temperature detection signal (Pmgrammable GainAmplifier, PGA) module carries out parallel moving of signal and preposition amplification,
Analog-digital converter (Analog-to-Digital is sent to by multiplexer (multiplexer, MUX) together
Converter, ADC) module, ADC is converted into digital quantity, then calibration process module (calibration
Processing module, CMC) read Electrically Erasable Programmable Read-Only Memory (Electrically Erasable
Programmable Read-Only Memory, EEPROM) compensating parameter and by special algorithm to signal carry out temperature mistake
Difference compensation and offset compensation simultaneously do normalized, finally by digital analog converter (Digital-to-Analog
Converter, DAC) analog voltage signal is converted to, it exports and presses by buffer amplifier (Buffer amplifier, BAMP)
Power detects electric signal.But this method needs to use dedicated pressure sensor asic chip, can greatly increase the throwing of cost
Enter, and also suffers from the influence of chip manufacturer delivery cycle.Secondly, will use ADC and DAC in chip, convert every time
(ADC or DAC), can lose precision, cause final output bias.In addition, final output voltage signal passes through ASIC's
DAC is obtained, this will increase output ripple and noise, if also needing to increase additional filter circuit to the product of low ripple.
Summary of the invention
The object of the present invention is to provide a kind of signal conditioning circuits of pressure sensor, digital in the prior art to solve
ASIC carries out signal condition, caused by high cost, the problem of precision drift, higher output ripple and noise.
In order to solve the above technical problems, providing a kind of signal tune of pressure sensor as one aspect of the present invention
Manage circuit, including pressure sensor core and concatenated first operational amplifier and second operational amplifier, pressure sensor
The differential signal positive output end of core is connected to the non-inverting input terminal of the first operational amplifier, the difference letter of pressure sensor core
Number negative output terminal is connected to the non-inverting input terminal of second operational amplifier, and the inverting input terminal of the first operational amplifier is connected to
The feedback end of two operational amplifiers, the output end of the first operational amplifier are signal output end.
The signal conditioning circuit of pressure sensor of the invention is by operational amplifier directly to pressure sensor output
Differential signal is amplified and is exported, and centre can be avoided the conversion between digital-to-analogue without the two times transfer Jing Guo digital-to-analogue
Caused loss of significance improves the precision of signal output.Simultaneously as difference information signal does not carry out modulus or digital-to-analogue turns
It changes, therefore the output ripple and noise generated during digital-to-analogue conversion can be reduced, improve signal accuracy, it is dry to reduce output
It disturbs, simultaneously as using common analog component to replace complicated ASIC digit chip, therefore can be effectively reduced into
This, reduces overall power.
Detailed description of the invention
Fig. 1 diagrammatically illustrates the principle assumption diagram of the signal conditioning circuit of pressure sensor in the prior art；
Fig. 2 diagrammatically illustrates the principle assumption diagram of the signal conditioning circuit of the pressure sensor of the embodiment of the present invention；
Fig. 3 diagrammatically illustrates the circuit diagram of the signal conditioning circuit of the pressure sensor of the embodiment of the present invention.
Appended drawing reference in figure：1, pressure sensor core；2, the first operational amplifier；3, second operational amplifier；4,
One slide rheostat；5, the first thermo-compensator；6, coupling resistance；7, the first feed circuit；8, second temperature compensates resistance；
9, the second feed circuit；10, the second slide rheostat；11, the first feedback resistance；12, third feed circuit；13, the second feedback
Resistance.
Specific embodiment
The embodiment of the present invention is described in detail below, but what the present invention can be defined by the claims and cover
Multitude of different ways is implemented.
It please refers to shown in Fig. 1 to Fig. 3, according to an embodiment of the invention, the signal conditioning circuit of pressure sensor includes pressure
Force snesor core 1 and concatenated first operational amplifier 2 and second operational amplifier 3, the difference of pressure sensor core 1
Signal positive output end b is connected to the non-inverting input terminal of the first operational amplifier 2, and the differential signal of pressure sensor core 1 is born defeated
Outlet a is connected to the non-inverting input terminal of second operational amplifier 3, and the inverting input terminal of the first operational amplifier 2 is connected to second
The feedback end of operational amplifier 3, the output end of the first operational amplifier 2 are signal output end.
The signal conditioning circuit by operational amplifier directly to pressure sensor output differential signal amplify with
Output, centre can be avoided loss of significance caused by the conversion between digital-to-analogue without the two times transfer Jing Guo digital-to-analogue, mention
The precision of high RST output.Simultaneously as difference information signal does not carry out modulus or digital-to-analogue conversion, therefore digital-to-analogue can be reduced and turned
Output ripple and noise during changing improve signal accuracy, reduce output interference, simultaneously as using common mould
Quasi- component replaces complicated ASIC digit chip, therefore cost can be effectively reduced, and reduces overall power.
Preferably, the inverting input terminal of second operational amplifier 3 is also connected with first adjusted for carrying out zero-bit output
Slide rheostat 4 and the first thermo-compensator 5 for carrying out temperature drift compensation.Wherein 4 one end of the first slide rheostat
It connects to power supply, zero-bit output imbalance can be compensated, guarantee the accuracy of the output voltage of signal, the first thermo-compensator 5
One end ground connection, can compensate sensor output in temperature coefficient zero-bit imbalance, to change zero under temperature variations
Output bias voltage in the case of pressure compensates the zero-pressure imbalance of sensor at different temperatures.
Preferably, the inverting input terminal of second operational amplifier 3 is also connected with first adjusted for carrying out zero-bit output
Slide rheostat 4 and the first thermo-compensator 5 for carrying out temperature drift compensation, the first slide rheostat 4 and the first temperature
Degree compensation resistance 5 is arranged in series.First slide rheostat 4 and the first thermo-compensator 5, Ke Yitong are set simultaneously in circuit
When the zero-bit of output voltage output imbalance and the imbalance of temperature coefficient zero-bit are compensated, improve the accuracy of output voltage.
The inverting input terminal of second operational amplifier 3 is also connected with coupling resistance 6, the first slide rheostat 4 and the first temperature
It connects after degree compensation 5 parallel connection of resistance with coupling resistance 6.Coupling resistance 6 can be eliminated due to introducing the first slide rheostat 4 and the
Influence of the compensation circuit of one thermo-compensator 5 to the differential signal negative output terminal of sensor, and by the inclined of compensation circuit
It sets voltage to be directly superimposed upon in final output signal, i.e. Vout1 (output voltage of the first operational amplifier)=times magnification
Number * (differential signal positive output-differential signal negative output)+offset voltage.
Preferably, the first feed circuit 7 is connected between the output end and inverting input terminal of the first operational amplifier 2, the
The second temperature compensation resistance 8 for compensating to temperature coefficient sensitivity is in series on one feed circuit 7.Second temperature is mended
The temperature coefficient sensitivity in sensor output can be compensated by repaying resistance 8, to guarantee sensor at different temperatures
Temperature sensitivity.
Preferably, the second feed circuit 9 is provided between the output end and inverting input terminal of second operational amplifier 3, the
Be provided with the second slide rheostat 10 for full scale adjustment of sensitivity on two feed circuits 9, the first operational amplifier 2 it is anti-
Phase input terminal is connected between the second slide rheostat 10 and the output end of second operational amplifier 3.Second slide rheostat 10
Can the full range voltage sensitivity to sensor compensate, thus sensor core completely press output when, still can have
Effect guarantees the precision of product sensor output voltage.
Preferably, it is additionally provided with the first feedback resistance 11 on the second feed circuit 9, the setting of the first feedback resistance 11 is the
Between two slide rheostats 10 and the output end of second operational amplifier 3, the inverting input terminal of the first operational amplifier 2 is connected
Between the second slide rheostat 10 and the first feedback resistance 11.First feedback resistance 11 can play signal amplification, from
And it can be improved the accuracy of sensor voltage adjusting.
Preferably, it is additionally provided with third feed circuit 12 between the output end and inverting input terminal of second operational amplifier 3,
Second feedback resistance 13 in parallel with the second slide rheostat 10 is provided on third feed circuit 12.Second feedback resistance 13
Signal amplification can also be played, so as to further increase the accuracy of sensor voltage adjusting.First feedback resistance
11 need to select the identical resistance of model can be final due to the introducing of second operational amplifier 3 with the second feedback resistance 13
The output voltage of second operational amplifier 3 is superimposed on output voltage, and this voltage is uncontrollable voltage, i.e. Vout1=is put
Multiple * (differential signal positive output-differential signal negative output)+offset voltage+amplification factor * K (amplification coefficient) * Vout2 greatly (the
The output voltage of two operational amplifiers 3), and the introducing of the first feedback resistance 11 and the second feedback resistance 13 can eliminate this part
Voltage (amplification factor * K*Vout2), to improve the accuracy and adjustability of output voltage.
This scheme realizes the translation and amplification of signal by operational amplifier and feedback resistance；Pass through the first sliding variable resistance
Device 4 compensates zero-bit output imbalance, compensates full scale sensitivity by the second slide rheostat 10；Pass through the first thermo-compensator
Temperature coefficient zero-bit imbalance in 5 compensation sensor outputs, second temperature compensate the temperature system in the compensation sensor output of resistance 8
Number sensitivity.First slide rheostat 4 and the first thermo-compensator 5 form resistance biasing networks, at zero-pressure room temperature (25 degree)
Under, the resistance value of the first slide rheostat 4 is adjusted, bias voltage is made to be added on output voltage by coupling resistance 6, is made final
Output voltage be 0.5V, in full normal pressure and temperature, adjust the second slide rheostat 10 resistance value, make final output voltage
4.5V.When temperature change, the resistance value of the first thermo-compensator 5 also can and then change, thus defeated in the case of changing zero-pressure
Bias voltage out, to compensate the zero-pressure imbalance of sensor at different temperatures；Second temperature compensates resistance 8 with the change of temperature
Resistance value can also change, and the change of resistance will affect the amplification factor of operational amplifier, so as to compensate different temperatures
Under, the sensitivity of sensor.
In the above embodiment of the invention, entire circuit is all made of analog circuit component, and internal there is no numbers to make an uproar
Acoustic jamming, and for operational amplifier, distinctive supply-voltage rejection ratio
(PowerSupplyRejectionRatio, PSRR) parameter ideally can carry out 90dB to power supply ripple and noise
Decaying, can be further reduced output ripple and noise.
Under conditions of equally using 5V power supply, the consumption electric current of digital ASIC chip is about 5~6mA in the prior art
(such as ZSC31150 maximum consumption electric current is 5.5mA), wastage in bulk or weight electric current about 7~8mA of product；Compared to Digital ASIC
Scheme, the operational amplifier consumption electric current in the embodiment of the present invention is generally less than 1mA, and (such as MAX4246 maximum consumption electric current is
0.7mA (single operational amplifier)), wastage in bulk or weight electric current about 3~4mA of product, power consumption can also reduce by one times.
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of signal conditioning circuit of pressure sensor, which is characterized in that including pressure sensor core (1) and concatenated
First operational amplifier (2) and second operational amplifier (3), the differential signal positive output end of the pressure sensor core (1)
It is connected to the non-inverting input terminal of first operational amplifier (2), the differential signal negative output of the pressure sensor core (1)
End is connected to the non-inverting input terminal of the second operational amplifier (3), and the inverting input terminal of first operational amplifier (2) connects
It is connected to the feedback end of the second operational amplifier (3), the output end of first operational amplifier (2) is signal output end.
2. signal conditioning circuit according to claim 1, which is characterized in that the reverse phase of the second operational amplifier (3)
Input terminal, which is also connected with, exports the first slide rheostat (4) adjusted and for carrying out temperature drift compensation for carrying out zero-bit
First thermo-compensator (5).
3. signal conditioning circuit according to claim 1, which is characterized in that the reverse phase of the second operational amplifier (3)
Input terminal, which is also connected with, exports the first slide rheostat (4) adjusted and for carrying out temperature drift compensation for carrying out zero-bit
First thermo-compensator (5), first slide rheostat (4) and first thermo-compensator (5) are arranged in series.
4. signal conditioning circuit according to claim 3, which is characterized in that the reverse phase of the second operational amplifier (3)
Input terminal is also connected with coupling resistance (6), and the coupling resistance (6) is connected to the reversed defeated of the second operational amplifier (3)
Enter between end and first slide rheostat (4) and the tandem node of first thermo-compensator (5) series circuit.
5. signal conditioning circuit according to claim 1, which is characterized in that the output of first operational amplifier (2)
It is connected with the first feed circuit (7) between end and inverting input terminal, is in series on first feed circuit (7) for temperature
The second temperature that Coefficient Sensitivity compensates compensates resistance (8).
6. signal conditioning circuit according to claim 4, which is characterized in that the output of the second operational amplifier (3)
It is provided with the second feed circuit (9) between end and inverting input terminal, is provided on second feed circuit (9) for full scale
The second slide rheostat (10) of adjustment of sensitivity, the inverting input terminal of first operational amplifier (2) are connected to described
Between two slide rheostats (10) and the output end of the second operational amplifier (3).
7. signal conditioning circuit according to claim 6, which is characterized in that also set up on second feed circuit (9)
Have the first feedback resistance (11), first feedback resistance (11) is arranged in second slide rheostat (10) and described second
Between the output end of operational amplifier (3), the inverting input terminal of first operational amplifier (2) is connected to second sliding
Between rheostat (10) and first feedback resistance (11).
8. signal conditioning circuit according to claim 6, which is characterized in that the output of the second operational amplifier (3)
End inverting input terminal between be additionally provided with third feed circuit (12), be provided on the third feed circuit (12) with it is described
The second feedback resistance (13) of second slide rheostat (10) parallel connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710324073.XA CN108871633B (en) | 2017-05-10 | 2017-05-10 | Signal conditioning circuit of pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710324073.XA CN108871633B (en) | 2017-05-10 | 2017-05-10 | Signal conditioning circuit of pressure sensor |
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| Publication Number | Publication Date |
|---|---|
| CN108871633A true CN108871633A (en) | 2018-11-23 |
| CN108871633B CN108871633B (en) | 2021-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710324073.XA Active CN108871633B (en) | 2017-05-10 | 2017-05-10 | Signal conditioning circuit of pressure sensor |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110567616A (en) * | 2019-08-29 | 2019-12-13 | 北京自动化控制设备研究所 | Signal acquisition circuit for silicon piezoresistive pressure sensor unit |
| CN110954146A (en) * | 2019-12-18 | 2020-04-03 | 哈尔滨吉赫科技有限责任公司 | Method for improving sensitivity of sensor |
| CN111693187A (en) * | 2019-03-15 | 2020-09-22 | 艾普凌科有限公司 | Semiconductor device with a plurality of semiconductor chips |
| CN112945459A (en) * | 2021-02-25 | 2021-06-11 | 中航电测仪器股份有限公司 | Zero-offset temperature compensation circuit and method of force signal conditioner |
| CN113203520A (en) * | 2021-05-27 | 2021-08-03 | 北京京城清达电子设备有限公司 | Pressure sensor debugging system and method |
| CN113904684A (en) * | 2021-12-08 | 2022-01-07 | 上海泰矽微电子有限公司 | Resistance network circuit for measuring ADC (analog to digital converter) |
| CN115580248A (en) * | 2022-11-10 | 2023-01-06 | 江苏谷泰微电子有限公司 | Precision differential amplifier with adjustable output common mode |
| CN115628843A (en) * | 2022-11-10 | 2023-01-20 | 上海直川电子科技有限公司 | Pressure transmitter |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111693187A (en) * | 2019-03-15 | 2020-09-22 | 艾普凌科有限公司 | Semiconductor device with a plurality of semiconductor chips |
| CN111693187B (en) * | 2019-03-15 | 2024-02-06 | 艾普凌科有限公司 | Semiconductor device with a semiconductor device having a plurality of semiconductor chips |
| CN110567616A (en) * | 2019-08-29 | 2019-12-13 | 北京自动化控制设备研究所 | Signal acquisition circuit for silicon piezoresistive pressure sensor unit |
| CN110954146A (en) * | 2019-12-18 | 2020-04-03 | 哈尔滨吉赫科技有限责任公司 | Method for improving sensitivity of sensor |
| CN110954146B (en) * | 2019-12-18 | 2021-12-07 | 哈尔滨吉赫科技有限责任公司 | Method for improving sensitivity of sensor |
| CN112945459B (en) * | 2021-02-25 | 2023-04-14 | 中航电测仪器股份有限公司 | Zero-offset temperature compensation method of force signal conditioner |
| CN112945459A (en) * | 2021-02-25 | 2021-06-11 | 中航电测仪器股份有限公司 | Zero-offset temperature compensation circuit and method of force signal conditioner |
| CN113203520A (en) * | 2021-05-27 | 2021-08-03 | 北京京城清达电子设备有限公司 | Pressure sensor debugging system and method |
| CN113203520B (en) * | 2021-05-27 | 2023-12-22 | 北京京城清达电子设备有限公司 | Pressure sensor debugging system and method |
| CN113904684A (en) * | 2021-12-08 | 2022-01-07 | 上海泰矽微电子有限公司 | Resistance network circuit for measuring ADC (analog to digital converter) |
| CN113904684B (en) * | 2021-12-08 | 2022-03-01 | 上海泰矽微电子有限公司 | Resistance network circuit for measuring ADC (analog to digital converter) |
| CN115628843A (en) * | 2022-11-10 | 2023-01-20 | 上海直川电子科技有限公司 | Pressure transmitter |
| CN115580248B (en) * | 2022-11-10 | 2023-11-28 | 江苏谷泰微电子有限公司 | Precise differential amplifier with adjustable output common mode |
| CN115580248A (en) * | 2022-11-10 | 2023-01-06 | 江苏谷泰微电子有限公司 | Precision differential amplifier with adjustable output common mode |
| CN115628843B (en) * | 2022-11-10 | 2024-05-14 | 直川科技(上海)有限公司 | Pressure transmitter |
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| CN108871633B (en) | 2021-11-30 |
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Effective date of registration: 20220208 Address after: 311800 Diankou Industrial Zone, Zhuji City, Shaoxing City, Zhejiang Province Patentee after: ZHEJIANG DUNAN ARTIFICIAL ENVIRONMENT Co.,Ltd. Address before: 310053 Dian Kou Zhen DUN'AN Road, Zhuji City, Shaoxing City, Zhejiang Province Patentee before: DUNAN SENSING TECHNOLOGY Co.,Ltd. |
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