CN116131786A - Signal differential amplification processing circuit applied to inductive analog quantity sensor - Google Patents
Signal differential amplification processing circuit applied to inductive analog quantity sensor Download PDFInfo
- Publication number
- CN116131786A CN116131786A CN202310222551.1A CN202310222551A CN116131786A CN 116131786 A CN116131786 A CN 116131786A CN 202310222551 A CN202310222551 A CN 202310222551A CN 116131786 A CN116131786 A CN 116131786A
- Authority
- CN
- China
- Prior art keywords
- circuit
- amplification processing
- signal
- pass filter
- processing circuit
- 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.)
- Pending
Links
- 230000003321 amplification Effects 0.000 title claims abstract description 77
- 238000003199 nucleic acid amplification method Methods 0.000 title claims abstract description 77
- 230000001939 inductive effect Effects 0.000 title claims description 11
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
Classifications
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
-
- 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
- H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
-
- 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
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
The signal differential amplification processing circuit is applied to the inductance type analog quantity sensor, the output end of the reference signal generation circuit is connected with the input end of the low-pass filter circuit, the output end of the low-pass filter circuit is connected with the input end of the first signal amplification processing circuit, and the output end of the first signal amplification processing circuit is connected with the first input end of the difference circuit; the input end of the analog signal acquisition circuit is connected with the input end of the band-pass filter circuit, the output end of the band-pass filter circuit is connected with the input end of the second signal amplification processing circuit, and the output end of the second signal amplification processing circuit is connected with the second input end of the difference circuit; the output end of the difference circuit is connected with the input end of the third signal amplification processing circuit; the output end of the third signal amplification processing circuit is connected with the input end of the AD acquisition circuit. The technical scheme can provide a very wide analog signal variation range for the AD acquisition circuit, thereby ensuring that the inductance type analog quantity sensor has higher resolution.
Description
Technical Field
The invention relates to the technical field of sensors, in particular to a signal differential amplification processing circuit applied to an inductance type analog quantity sensor.
Background
To achieve high resolution, high-precision inductive analog sensors have a wide range of voltages for the internal analog-to-digital conversion (AD) of the circuit and the entire analog signal to the AD. Currently, the resolution of AD is already a limiting factor.
The traditional solution is to directly linearly amplify the acquired analog signal. The method is limited by the maximum range of the analog-to-digital conversion module (AD), and the analog-to-digital conversion module (AD) with a larger range is selected, so that the complexity of the whole sensor power supply system is greatly increased; meanwhile, if the lower limit value of the acquired analog signal range is higher, the lower limit value, the range and the upper limit value of the acquired analog signal are linearly amplified at the same time when the acquired analog signal is directly linearly amplified. At this time, the upper limit value of the range of the collected signal exceeds the upper limit value of the analog-to-digital conversion module (AD) when the range is not greatly linearly amplified. When the range of the collected signal is narrower and the bit number of the AD is a certain value, the range of the analog signal represented by each bit of the AD is increased, thereby greatly reducing the resolution of the sensor to the physical quantity of the metal target bit displacement. That is, if the resolution of the inductive analog sensor is to be further increased, a wider analog signal must be given to the AD.
Therefore, in order to solve the above-mentioned problems, it is necessary to design a differential signal amplification processing circuit applied in an inductance type analog sensor.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a signal differential amplification processing circuit applied to an inductive analog quantity sensor.
To achieve the above and other related objects, the present invention provides the following technical solutions: a signal differential amplification processing circuit applied to an inductance type analog quantity sensor comprises: the device comprises a reference signal generating circuit, an analog signal acquisition circuit, a low-pass filter circuit, a band-pass filter circuit, a first signal amplification processing circuit, a second signal amplification processing circuit, a difference circuit, a third signal amplification processing circuit and an AD acquisition circuit; the output end of the reference signal generating circuit is connected with the input end of the low-pass filter circuit, the output end of the low-pass filter circuit is connected with the input end of the first signal amplification processing circuit, and the output end of the first signal amplification processing circuit is connected with the first input end of the difference circuit; the input end of the analog signal acquisition circuit is connected with the input end of the band-pass filter circuit, the output end of the band-pass filter circuit is connected with the input end of the second signal amplification processing circuit, and the output end of the second signal amplification processing circuit is connected with the second input end of the difference circuit; the output end of the difference circuit is connected with the input end of the third signal amplification processing circuit; and the output end of the third signal amplification processing circuit is connected with the input end of the AD acquisition circuit.
The preferable technical scheme is as follows: the reference signal generating circuit is used for generating and outputting a high-precision reference signal; the low-pass filter circuit is used for performing low-pass filter processing on the reference signal output by the reference signal generating circuit; the first signal amplification processing circuit is used for performing low-multiple linear amplification processing on the reference signal output by the low-pass filter circuit.
The preferable technical scheme is as follows: the analog signal acquisition circuit is used for acquiring and outputting analog signals; the band-pass filter circuit is used for carrying out band-pass filter processing on the analog signals output by the analog signal acquisition circuit; the second signal amplification processing circuit is used for performing low-multiple linear amplification processing on the analog signal output by the band-pass filter circuit.
The preferable technical scheme is as follows: the difference circuit is used for carrying out difference operation on the reference signal output by the low-pass filter circuit and the analog signal output by the band-pass filter circuit.
The preferable technical scheme is as follows: the third signal amplification processing circuit is used for performing high-multiple linear amplification processing on the signal output by the difference circuit.
Due to the application of the technical scheme, the invention has the following beneficial effects:
the signal differential amplification processing circuit applied to the inductance type analog quantity sensor provided by the invention can enable the analog signals acquired by the analog signal acquisition circuit to be amplified in a lossless manner, and can provide a very wide analog signal change range for the AD acquisition circuit, so that the inductance type analog quantity sensor is ensured to have higher resolution.
Drawings
FIG. 1 is a schematic diagram of the present invention.
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present invention, which is described by the following specific examples.
Please refer to fig. 1. It should be noted that, in the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or directions or positional relationships in which the inventive product is conventionally put in use, are merely for convenience of describing the present invention and for simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance. The terms "horizontal," "vertical," "overhang," and the like do not denote that the component is required to be absolutely horizontal or overhang, but may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediary, or communicating between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
According to one general technical concept of the present invention, there is provided a signal differential amplification processing circuit applied to an inductive analog quantity sensor, including: the device comprises a reference signal generating circuit, an analog signal acquisition circuit, a low-pass filter circuit, a band-pass filter circuit, a first signal amplification processing circuit, a second signal amplification processing circuit, a difference circuit, a third signal amplification processing circuit and an AD acquisition circuit; the output end of the reference signal generating circuit is connected with the input end of the low-pass filter circuit, the output end of the low-pass filter circuit is connected with the input end of the first signal amplification processing circuit, and the output end of the first signal amplification processing circuit is connected with the first input end of the difference circuit; the input end of the analog signal acquisition circuit is connected with the input end of the band-pass filter circuit, the output end of the band-pass filter circuit is connected with the input end of the second signal amplification processing circuit, and the output end of the second signal amplification processing circuit is connected with the second input end of the difference circuit; the output end of the difference circuit is connected with the input end of the third signal amplification processing circuit; the output end of the third signal amplification processing circuit is connected with the input end of the AD acquisition circuit.
Fig. 1 shows a schematic diagram according to an exemplary embodiment of the present invention.
As shown in fig. 1, in an exemplary embodiment of the present invention, a signal differential amplification processing circuit applied to an inductive analog sensor is disclosed, comprising: a reference signal generating circuit 1, an analog signal acquisition circuit 2, a low-pass filter circuit 3, a band-pass filter circuit 4, a first signal amplification processing circuit 5, a second signal amplification processing circuit 6, a difference circuit 7, a third signal amplification processing circuit 8 and an AD acquisition circuit 9; the output end of the reference signal generating circuit is connected with the input end of the low-pass filter circuit, the output end of the low-pass filter circuit is connected with the input end of the first signal amplification processing circuit, and the output end of the first signal amplification processing circuit is connected with the first input end of the difference circuit; the input end of the analog signal acquisition circuit is connected with the input end of the band-pass filter circuit, the output end of the band-pass filter circuit is connected with the input end of the second signal amplification processing circuit, and the output end of the second signal amplification processing circuit is connected with the second input end of the difference circuit; the output end of the difference circuit is connected with the input end of the third signal amplification processing circuit; the output end of the third signal amplification processing circuit is connected with the input end of the AD acquisition circuit.
As shown in fig. 1, in the illustrated embodiment, a reference signal generating circuit is used to generate and output a high-precision reference signal; the low-pass filter circuit is used for performing low-pass filter processing on the reference signal output by the reference signal generating circuit so as to filter signal interference; the first signal amplification processing circuit is used for performing low-multiple linear amplification processing on the reference signal output by the low-pass filter circuit, adjusting the signal to a proper point for subsequent circuit processing, and the obtained signal is recorded as Ref.
As shown in fig. 1, in the illustrated embodiment, an analog signal acquisition circuit is used to acquire and output an analog signal; the band-pass filter circuit is used for carrying out band-pass filter processing on the analog signals output by the analog signal acquisition circuit so as to filter signal interference; the second Signal amplification processing circuit is used for performing low-multiple linear amplification processing on the analog Signal output by the band-pass filter circuit, the amplification factor at the moment must be proper, the upper limit value of the analog Signal is prevented from exceeding the upper limit value of the AD acquisition circuit, and the obtained Signal is recorded as Signal at the moment.
As shown in fig. 1, in the illustrated embodiment, the difference circuit is configured to perform a difference operation on the reference Signal output by the low-pass filter circuit and the analog Signal output by the band-pass filter circuit, where the obtained Signal is denoted as Signal-Ref.
As shown in fig. 1, in the illustrated embodiment, the third signal amplification processing circuit is configured to perform high-multiple linear amplification processing on the signal output by the difference circuit, so that the upper limit value of the signal is close to the upper limit value of the AD acquisition circuit, and the lower limit value of the signal is close to the lower limit value of the AD acquisition circuit.
Therefore, the invention has the following advantages:
the signal differential amplification processing circuit applied to the inductance type analog quantity sensor provided by the invention can enable the analog signals acquired by the analog signal acquisition circuit to be amplified in a lossless manner, and can provide a very wide analog signal change range for the AD acquisition circuit, so that the inductance type analog quantity sensor is ensured to have higher resolution.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations which can be accomplished by persons skilled in the art without departing from the spirit and technical spirit of the present invention shall be covered by the appended claims.
Claims (5)
1. The signal differential amplification processing circuit applied to the inductance type analog quantity sensor is characterized by comprising the following components: the device comprises a reference signal generating circuit, an analog signal acquisition circuit, a low-pass filter circuit, a band-pass filter circuit, a first signal amplification processing circuit, a second signal amplification processing circuit, a difference circuit, a third signal amplification processing circuit and an AD acquisition circuit; the output end of the reference signal generating circuit is connected with the input end of the low-pass filter circuit, the output end of the low-pass filter circuit is connected with the input end of the first signal amplification processing circuit, and the output end of the first signal amplification processing circuit is connected with the first input end of the difference circuit; the input end of the analog signal acquisition circuit is connected with the input end of the band-pass filter circuit, the output end of the band-pass filter circuit is connected with the input end of the second signal amplification processing circuit, and the output end of the second signal amplification processing circuit is connected with the second input end of the difference circuit; the output end of the difference circuit is connected with the input end of the third signal amplification processing circuit; and the output end of the third signal amplification processing circuit is connected with the input end of the AD acquisition circuit.
2. The signal differential amplification processing circuit applied to an inductive analog quantity sensor according to claim 1, wherein: the reference signal generating circuit is used for generating and outputting a high-precision reference signal; the low-pass filter circuit is used for performing low-pass filter processing on the reference signal output by the reference signal generating circuit; the first signal amplification processing circuit is used for performing low-multiple linear amplification processing on the reference signal output by the low-pass filter circuit.
3. The signal differential amplification processing circuit applied to an inductive analog quantity sensor according to claim 1, wherein: the analog signal acquisition circuit is used for acquiring and outputting analog signals; the band-pass filter circuit is used for carrying out band-pass filter processing on the analog signals output by the analog signal acquisition circuit; the second signal amplification processing circuit is used for performing low-multiple linear amplification processing on the analog signal output by the band-pass filter circuit.
4. The signal differential amplification processing circuit applied to an inductive analog quantity sensor according to claim 1, wherein: the difference circuit is used for carrying out difference operation on the reference signal output by the low-pass filter circuit and the analog signal output by the band-pass filter circuit.
5. The signal differential amplification processing circuit applied to an inductive analog quantity sensor according to claim 1, wherein: the third signal amplification processing circuit is used for performing high-multiple linear amplification processing on the signal output by the difference circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310222551.1A CN116131786A (en) | 2023-03-09 | 2023-03-09 | Signal differential amplification processing circuit applied to inductive analog quantity sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310222551.1A CN116131786A (en) | 2023-03-09 | 2023-03-09 | Signal differential amplification processing circuit applied to inductive analog quantity sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116131786A true CN116131786A (en) | 2023-05-16 |
Family
ID=86308301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310222551.1A Pending CN116131786A (en) | 2023-03-09 | 2023-03-09 | Signal differential amplification processing circuit applied to inductive analog quantity sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116131786A (en) |
-
2023
- 2023-03-09 CN CN202310222551.1A patent/CN116131786A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107941417B (en) | Output calibration device and method for pressure sensor | |
| KR100756257B1 (en) | Data read circuit of solid-state imaging device, imaging apparatus, and data read method for solid-state imaging device | |
| CN1668934A (en) | Electronic interface for use with dual electrode capacitance diaphragm gauges | |
| CN102075150B (en) | Photoelectric signal preconditioning amplifying circuit of auto iris for digital gastrointestinal machine | |
| CN110702974B (en) | High-reliability current sampling circuit of alternating current servo motor | |
| CN112630516A (en) | High-precision sensor current signal sampling method and circuit | |
| CN115276661A (en) | Ultrahigh resolution analog-to-digital converter | |
| JP3798462B2 (en) | Solid-state imaging device | |
| CN219740327U (en) | Signal differential amplification processing circuit applied to inductive analog quantity sensor | |
| CN106571824A (en) | Signal processing circuit | |
| CN109342805B (en) | High-precision microampere current detection circuit | |
| CN116131786A (en) | Signal differential amplification processing circuit applied to inductive analog quantity sensor | |
| Schnatz et al. | Smart CMOS capacitive pressure transducer with on-chip calibration capability | |
| CN109361883A (en) | Pixel readout circuit and imaging sensor | |
| CN209842605U (en) | Bus type isolator | |
| CN117330812A (en) | Microvolts signal acquisition and recognition method and satellite-borne computer | |
| US8456337B1 (en) | System to interface analog-to-digital converters to inputs with arbitrary common-modes | |
| CN112630524A (en) | Low-current signal acquisition processing circuit and acquisition processing method | |
| CN221160161U (en) | Intelligent locking device | |
| CN221886476U (en) | AD sampling circuit and measuring instrument | |
| CN217388685U (en) | Analog signal acquisition circuit | |
| CN220359144U (en) | Remote transmission signal V-I conversion circuit with high anti-interference linearity | |
| CN217878001U (en) | Bridge health monitoring system | |
| CN212134803U (en) | Wide-range high-precision voltage measuring device | |
| CN216979172U (en) | High-voltage alternating-current voltage acquisition circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |