CN101769791B - Linear optical sensing device - Google Patents
Linear optical sensing device Download PDFInfo
- Publication number
- CN101769791B CN101769791B CN2008101892994A CN200810189299A CN101769791B CN 101769791 B CN101769791 B CN 101769791B CN 2008101892994 A CN2008101892994 A CN 2008101892994A CN 200810189299 A CN200810189299 A CN 200810189299A CN 101769791 B CN101769791 B CN 101769791B
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- crystal switch
- sampling hold
- connects
- hold amplifier
- optical sensing
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Abstract
The invention provides a linear optical sensing device, comprising: a sampling hold amplifier (sampling hold AMP), whose positive-phase input end and opposite-phase input end are respectively connected with an optical sensing diode, the output end of the sampling hold amplifier is connected with a set of drivers (Driver); the set of drivers (Driver) is provided with a first crystal switch and a second crystal switch, through the switching of the first crystal switch and the second crystal switch, the output value can be led to present linear signal along with the brightness change of the light source.
Description
Technical field
The present invention relates to a kind of Photoinduction device, relate in particular to a kind of linear optical sensing device.
Background technology
See also shown in Figure 1ly, it is the synoptic diagram of photoresistance, and the characteristics of photoresistance 100 be exactly resistivity is to react to light with the resistance that the power of incident light changes, have the light time, immediately conduction; When unglazed, end immediately.
See also shown in Figure 2, it is the synoptic diagram of optical diode, optical diode 200 is structures of utilizing diode, when photon irradiation arrives the exhaustion region of diode, the electronics electricity hole that is produced causes electronics electricity hole separately to because the electric power that is subjected to is opposite, enters N type and P type differential gap individually, form photocurrent, allow circuit turn-on.
Yet general optical inductor is if use above-mentioned photoresistance 100 or optical diode 200 separately, and it is subjected to temperature or noise disturbs easily when work, and its output has only single signal can't respond to two segment signals; Therefore, for the existing shortcoming problem of forgoing, this case inventor is with professional attainment and technical concept that itself was possessed and itself be engaged in described work experience for many years, through studying and improveing repeatedly, and provide a kind of linear optical sensing device, it is not easy to be subjected to temperature or noise and disturbs, and reaching the purpose of accurate detecting light source, and makes output valve be linear signal along with the variation of light source.
Summary of the invention
The object of the present invention is to provide a kind of linear optical sensing device, when it provided the induction light source, the brightness variation along with light source made output valve be linear signal.
In order to achieve the above object, the invention provides a kind of linear optical sensing device, it comprises: a sampling hold amplifier (sampling hold AMP), connect a photoinduction diode respectively at its normal phase input end and inverting input thereof, the output terminal by the sampling hold amplifier connects a set drive (Driver) again; One set drive (Driver), it has first crystal switch and second crystal switch, switches by first crystal switch and second crystal switch, and the brightness that can be accompanied by light source changes, and makes output valve be linear signal.
Compared with prior art, by above-mentioned member, make linear optical sensing device of the present invention, the time be not easy to be subjected to temperature or noise disturbs in work, and it is behind the induction light source, output signal can be exported with linearity.
Description of drawings
Fig. 1 is the synoptic diagram of photoresistance;
Fig. 2 is the synoptic diagram of optical diode;
Fig. 3 is a circuit diagram of the present invention;
Fig. 4 is the oscillogram of output signal corresponding light source of the present invention.
Description of reference numerals: linear optical sensing device-1; Photoinduction diode-10; Sampling hold amplifier-20; Driver (Driver)-30; First crystal switch-1; Second crystal switch-32; Photoresistance-100; Optical diode-200.
Embodiment
Your auditor is convenient to understand content of the present invention in order to make, and the effect that can reach, cooperates graphic, figure number to be described in detail as follows now:
See also shown in Figure 3ly, it is a circuit diagram of the present invention, a kind of linear optical sensing device 1, and it comprises:
One sampling hold amplifier (sampling hold AMP) 20 connects a photoinduction diode 10 respectively at its normal phase input end and inverting input thereof, and the output terminal by sampling hold amplifier 20 connects a set drive (Driver) 30 again; Wherein, described photoinduction diode 10 has two, the P type of a photoinduction diode 10 connects the normal phase input end that face is connected in sampling hold amplifier 20, the P type of another photoinduction diode 10 connects the inverting input that face is connected in sampling hold amplifier 20, and the N type of these two photoinduction diodes 10 connects face and then holds with being connected in.
One set drive (Driver) 30, it has first crystal switch 31 and second crystal switch 32, switches by first crystal switch 31 and second crystal switch 32, and the brightness that can be accompanied by light source changes, and makes output valve be linear signal; Wherein, described first crystal switch 31 and second crystal switch 32 have gate terminal (G), drain electrode end (D) and source terminal (S) respectively, and described first crystal switch is PMOS, and second crystal switch is NMOS; Moreover the drain electrode end of described first crystal switch 31 (D) connects the drain electrode end (D) of second crystal switch 32, the source terminal of described again second crystal switch 32 (S) ground connection, and the source terminal of first crystal switch 31 (S) is exported as signal.
See also shown in Figure 4ly, it is the oscillogram of output signal corresponding light source of the present invention, during its detection light source, be not easy to be subjected to temperature or noise and disturb, and it is behind the induction light source, and output signal can be exported with linearity.
But the above only is a preferable possible embodiments of the present invention, non-so promptly arrest limit claim of the present invention, the equivalence invention of therefore using instructions of the present invention and graphic content to do such as, directly or indirectly apply to other correlative technology field person, all in like manner all ought to be contained in the scope of spiritual category of the present invention.
Especially its advantage work one is summarized as follows for highlighting the present invention:
Advantage of the present invention:
Have progressive, the present invention is not easy to be subjected to temperature when work or noise disturbs.
Have industry applications, the present invention can reach the control requirement accurately behind the induction light source, and is accompanied by the variation of light source and produces output signal and can export with linearity.
In sum, the present invention is breaking through under the existing technology, certain effect that has reached institute's desire enhancement, and also non-familiar described the easy full of beard of skill person institute reaches; Moreover not open before the present patent application, the progressive of its tool, novelty show the application important document that has met novel patent, propose novel application in accordance with the law.
Claims (2)
1. a linear optical sensing device is characterized in that, it comprises a sampling hold amplifier and a set drive:
Described sampling hold amplifier connects a photoinduction diode respectively at its normal phase input end and inverting input thereof, and the output terminal by described sampling hold amplifier connects a described set drive again;
A described set drive, it has first crystal switch and second crystal switch, switches by described first crystal switch and described second crystal switch, and the brightness that can be accompanied by light source changes, and makes output valve be linear signal;
Described first crystal switch and described second crystal switch have gate terminal, drain electrode end and source terminal respectively, and described first crystal switch is PMOS, and second crystal switch is NMOS;
The drain electrode end of described first crystal switch connects the drain electrode end of described second crystal switch, the source terminal ground connection of described again second crystal switch, and the source terminal of described first crystal switch is exported as signal.
2. linear optical sensing device as claimed in claim 1, it is characterized in that, described photoinduction diode has two, the P type of one of them photoinduction diode connects the normal phase input end that face is connected in described sampling hold amplifier, wherein the P type of another photoinduction diode connects the inverting input that face is connected in described sampling hold amplifier, and the N type of described two photoinduction diodes connects face and holds with being connected in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101892994A CN101769791B (en) | 2008-12-30 | 2008-12-30 | Linear optical sensing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101892994A CN101769791B (en) | 2008-12-30 | 2008-12-30 | Linear optical sensing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101769791A CN101769791A (en) | 2010-07-07 |
| CN101769791B true CN101769791B (en) | 2011-11-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101892994A Expired - Fee Related CN101769791B (en) | 2008-12-30 | 2008-12-30 | Linear optical sensing device |
Country Status (1)
| Country | Link |
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| CN (1) | CN101769791B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108981910B (en) | 2017-06-05 | 2021-01-19 | 京东方科技集团股份有限公司 | Photoelectric detection circuit and photoelectric detector |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6841771B2 (en) * | 2001-05-22 | 2005-01-11 | Sharp Kabushiki Kaisha | Optical coupling device and light-receiving circuit of same |
| CN1742191A (en) * | 2003-01-22 | 2006-03-01 | 浜松光子学株式会社 | Optical sensing device |
| CN200944062Y (en) * | 2006-08-22 | 2007-09-05 | 深圳市海川实业股份有限公司 | Ultraviolet light intensive detection circuit |
| CN101174902A (en) * | 2006-10-31 | 2008-05-07 | 安华高科技Ecbuip(新加坡)私人有限公司 | High dynamic range optical receiver |
-
2008
- 2008-12-30 CN CN2008101892994A patent/CN101769791B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6841771B2 (en) * | 2001-05-22 | 2005-01-11 | Sharp Kabushiki Kaisha | Optical coupling device and light-receiving circuit of same |
| CN1742191A (en) * | 2003-01-22 | 2006-03-01 | 浜松光子学株式会社 | Optical sensing device |
| CN200944062Y (en) * | 2006-08-22 | 2007-09-05 | 深圳市海川实业股份有限公司 | Ultraviolet light intensive detection circuit |
| CN101174902A (en) * | 2006-10-31 | 2008-05-07 | 安华高科技Ecbuip(新加坡)私人有限公司 | High dynamic range optical receiver |
Non-Patent Citations (2)
| Title |
|---|
| JP特开2005-130173A 2005.05.19 |
| JP特开平5-5653A 1993.01.14 |
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| Publication number | Publication date |
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| CN101769791A (en) | 2010-07-07 |
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Owner name: DIODES INC. Free format text: FORMER OWNER: YIHENG ELECTRONIC CO., LTD. Effective date: 20100926 |
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Granted publication date: 20111109 Termination date: 20131230 |