CN109764966A - A kind of high impedance integrated chip and pyroelectric sensor - Google Patents
A kind of high impedance integrated chip and pyroelectric sensor Download PDFInfo
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- CN109764966A CN109764966A CN201910123128.XA CN201910123128A CN109764966A CN 109764966 A CN109764966 A CN 109764966A CN 201910123128 A CN201910123128 A CN 201910123128A CN 109764966 A CN109764966 A CN 109764966A
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- high impedance
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 230000009466 transformation Effects 0.000 abstract description 6
- 230000006641 stabilisation Effects 0.000 abstract description 5
- 238000011105 stabilization Methods 0.000 abstract description 5
- 230000005616 pyroelectricity Effects 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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Abstract
The present invention relates to a kind of high impedance integrated chip and pyroelectric sensors, high impedance integrated chip is applied to pyroelectric sensor, including operational amplifier and resistance Rg, the non-inverting input terminal and reverse input end of the operational amplifier are connect with the both ends of pyroelectric sensing member respectively；The both ends of the resistance Rg correspond respectively to be connect with the non-inverting input terminal of the operational amplifier and reverse input end；The positive power source terminal of the operational amplifier is connect with power vd D；The negative power end of the operational amplifier is connect with power supply VSS；The output end output signal of the operational amplifier.Compared with the prior art, the configuration of the present invention is simple is reliable, realizes pyroelectric sensing member impedance transformation using the resistance Rg of 10-120G ohm；Significantly improve the temperature and signal stabilization of product；The pyroelectricity signal stabilization and consistency of product are good.
Description
Technical field
The present invention relates to pyroelectric sensor technical fields, specifically, in particular to a kind of high impedance integrated chip and
Pyroelectric sensor.
Background technique
In the related technology, the pyroelectric sensor of signal is drawn using JFET (junction type field response pipe)；It has the disadvantage that
1, general JFET input impedance is unstable greater than 1Tohm, and input impedance distribution is big；2, the bias voltage discreteness ratio of general JFET
It is larger generally in 0.3-1.5V；Bias voltage stablizes 0.3-2.0V medium design, is distributed +/- 20% range；3, JFET input electricity
Hold and mutual conductance distribution is larger, output signal discrete type is big.Client is poor using consistency；4, high performance pyroelectric sensor, electricity
Road configures the resistance of a 50Gohm, and at high cost and production technology is complicated.
Summary of the invention
The present invention is directed to solve one of above-mentioned technical problem in the prior art at least to a certain extent.For this purpose, this hair
A bright purpose is to propose a kind of high impedance collection that is simple and reliable, realizing impedance transformation, improvement temperature and signal stabilization
At chip and pyroelectric sensor.
The technical scheme to solve the above technical problems is that a kind of high impedance integrated chip, is applied to pyroelectricity
Sensor, including operational amplifier and resistance Rg, the non-inverting input terminal and reverse input end of the operational amplifier respectively with heat
Release the both ends connection of electric induction member；The both ends of the resistance Rg correspond and the non-inverting input terminal of the operational amplifier respectively
It is connected with reverse input end；The positive power source terminal of the operational amplifier is connect with power vd D；The negative supply of the operational amplifier
End is connect with power supply VSS；The output end output signal of the operational amplifier.
Based on the above technical solution, the present invention can also be improved as follows.
It further, further include resistance Rd, the positive power source terminal of the operational amplifier is connect through resistance Rd with power vd D.
It further, further include resistance Rs, the negative power end of the operational amplifier is connect through resistance Rs with power supply VSS.
Further, the resistance Rg is resistance value adjustable resistance, and the resistance value of the resistance Rg is 10-120G ohm.
The beneficial effects of the present invention are: it is simple and reliable for structure, pyroelectric sensing is realized using the resistance Rg of 10-120G ohm
First impedance transformation；Significantly improve the temperature and signal stabilization of product；The pyroelectricity signal stabilization and consistency of product are good.
Another technical solution that the present invention solves above-mentioned technical problem is as follows: a kind of pyroelectric sensor, including pyroelectricity
Induction member and high impedance integrated chip, two signal ends of the pyroelectric sensing member correspond and the integrated chip respectively
Non-inverting input terminal connected with reverse input end.
Further, further include optical filter, the optical filter is placed in the side of the pyroelectric sensing member, the optical filter with
The pyroelectric sensing member is in same horizontal line.
The beneficial effects of the present invention are: pyroelectric sensing member and high impedance integrated chip band impedance transformation and fixed gain,
Signal is converted by impedance, is improved the stability and coupling consistency of signal, is then exported electric signal by operational amplifier.
Detailed description of the invention
Fig. 1 is the circuit diagram of a kind of high impedance integrated chip of the present invention and pyroelectric sensor.
In attached drawing, parts list represented by the reference numerals are as follows:
1, pyroelectric sensing member, 2, integrated chip, 2.1, operational amplifier, 3, optical filter.
Specific embodiment
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the invention.
As shown in Figure 1, a kind of high impedance integrated chip, is applied to pyroelectric sensor, including operational amplifier 2.1 and electricity
Rg is hindered, the non-inverting input terminal and reverse input end of the operational amplifier 2.1 are connect with the both ends of pyroelectric sensing member 1 respectively；
The both ends of the resistance Rg correspond respectively to be connect with the non-inverting input terminal of the operational amplifier 2.1 and reverse input end；
The positive power source terminal of the operational amplifier 2.1 is connect with power vd D；The negative power end and power supply VSS of the operational amplifier 2.1
Connection；The output end output signal of the operational amplifier 2.1.
It further include resistance Rd in above-described embodiment, the positive power source terminal of the operational amplifier 2.1 is through resistance Rd and power supply
VDD connection；Integrated resistor Rd preferably adapts to the fluctuation of power supply.
It further include resistance Rs in above-described embodiment, the negative power end of the operational amplifier 2.1 is through resistance Rs and power supply
VSS connection.Integrated resistor Rs is to high impedance integrated chip, and back-end circuit application is simply.
In above-described embodiment, the resistance Rg is resistance value adjustable resistance, and the resistance value of the resistance Rg is 10-120G ohm.
The signal of pyroelectric sensing member 1 can export stable signal by resistance Rg transformation；Become by specification resistance Rg
The input impedance changed can significantly reduce pyroelectric sensor in low temperature and height in the coupled capacitor of 10-120G ohm&0.1-10pF
Temperature is because the violent of first 1 material resistance of pyroelectric sensing converts the jitter generated, and significantly improves pyroelectric sensing
The distribution concentration degree of first 1 output signal；The resistance value of built-in resistor Rs is that interference and client cost is effectively reduced in 20K-1M ohm.
As shown in Figure 1, a kind of pyroelectric sensor, including pyroelectric sensing member 1 and high impedance integrated chip 2, the heat
Two signal ends for releasing electric induction member 1 correspond and the non-inverting input terminal of the high impedance integrated chip 2 and reversed defeated respectively
Enter end connection.
It further include optical filter 3 in above-described embodiment, the optical filter 3 is placed in the side of the pyroelectric sensing member 1, institute
Optical filter 3 and pyroelectric sensing member 1 are stated in same horizontal line.
With impedance transformation and fixed gain, signal is converted by impedance for pyroelectric sensing member 1 and high impedance integrated chip 2,
The stability and coupling consistency for improving signal, then export electric signal by operational amplifier 2.1.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of high impedance integrated chip, be applied to pyroelectric sensor, it is characterised in that: including operational amplifier (2.1) and
Resistance Rg, the non-inverting input terminal and reverse input end of the operational amplifier (2.1) both ends with pyroelectric sensing first (1) respectively
Connection；The both ends of the resistance Rg correspond and the non-inverting input terminal of the operational amplifier (2.1) and reversed input respectively
End connection；The positive power source terminal of the operational amplifier (2.1) is connect with power vd D；The negative supply of the operational amplifier (2.1)
End is connect with power supply VSS；The output end output signal of the operational amplifier (2.1).
2. a kind of high impedance integrated chip according to claim 1, it is characterised in that: further include resistance Rd, the operation is put
The positive power source terminal of big device (2.1) is connect through resistance Rd with power vd D.
3. a kind of high impedance integrated chip according to claim 2, it is characterised in that: further include resistance Rs, the operation is put
The negative power end of big device (2.1) is connect through resistance Rs with power supply VSS.
4. a kind of high impedance integrated chip according to any one of the claim 1 to 3, it is characterised in that: the resistance Rg is resistance
It is worth adjustable resistance, the resistance value of the resistance Rg is 10-120G ohm.
5. a kind of pyroelectric sensor, it is characterised in that: including described in pyroelectric sensing first (1) and any one of Claims 1-4
High impedance integrated chip (2), two signal ends of the pyroelectric sensing first (1) correspond respectively and the high impedance collection
It is connected at the non-inverting input terminal of chip (2) with reverse input end.
6. a kind of pyroelectric sensor according to claim 5, it is characterised in that: further include optical filter (3), the optical filter
(3) it is placed in the side of the pyroelectric sensing first (1), the optical filter (3) and the pyroelectric sensing first (1) are in same water
On horizontal line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910123128.XA CN109764966A (en) | 2019-02-15 | 2019-02-15 | A kind of high impedance integrated chip and pyroelectric sensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910123128.XA CN109764966A (en) | 2019-02-15 | 2019-02-15 | A kind of high impedance integrated chip and pyroelectric sensor |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102468884A (en) * | 2010-11-12 | 2012-05-23 | 安立股份有限公司 | Photoelectric conversion circuit |
| CN104296881A (en) * | 2013-11-28 | 2015-01-21 | 中国航空工业集团公司洛阳电光设备研究所 | Scanning pendulum mirror signal processing circuit for linear array infrared detectors |
| CN105938018A (en) * | 2016-04-13 | 2016-09-14 | 电子科技大学 | Pyroelectric detector |
| CN106052857A (en) * | 2016-08-22 | 2016-10-26 | 成都三零嘉微电子有限公司 | Photoelectric detection circuit with temperature compensation function |
| CN106525252A (en) * | 2016-12-29 | 2017-03-22 | 重庆奥海辉龙大数据有限公司 | Pyroelectric sensing circuit and signal conversion processing method |
| CN209416507U (en) * | 2019-02-15 | 2019-09-20 | 东莞传晟光电有限公司 | A kind of high impedance integrated chip and pyroelectric sensor |
-
2019
- 2019-02-15 CN CN201910123128.XA patent/CN109764966A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102468884A (en) * | 2010-11-12 | 2012-05-23 | 安立股份有限公司 | Photoelectric conversion circuit |
| CN104296881A (en) * | 2013-11-28 | 2015-01-21 | 中国航空工业集团公司洛阳电光设备研究所 | Scanning pendulum mirror signal processing circuit for linear array infrared detectors |
| CN105938018A (en) * | 2016-04-13 | 2016-09-14 | 电子科技大学 | Pyroelectric detector |
| CN106052857A (en) * | 2016-08-22 | 2016-10-26 | 成都三零嘉微电子有限公司 | Photoelectric detection circuit with temperature compensation function |
| CN106525252A (en) * | 2016-12-29 | 2017-03-22 | 重庆奥海辉龙大数据有限公司 | Pyroelectric sensing circuit and signal conversion processing method |
| CN209416507U (en) * | 2019-02-15 | 2019-09-20 | 东莞传晟光电有限公司 | A kind of high impedance integrated chip and pyroelectric sensor |
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