CN206683759U - A kind of light sensation detector circuit - Google Patents
A kind of light sensation detector circuit Download PDFInfo
- Publication number
- CN206683759U CN206683759U CN201720386231.XU CN201720386231U CN206683759U CN 206683759 U CN206683759 U CN 206683759U CN 201720386231 U CN201720386231 U CN 201720386231U CN 206683759 U CN206683759 U CN 206683759U
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- CN
- China
- Prior art keywords
- operational amplifier
- dual operational
- resistance
- light sensation
- detector circuit
- Prior art date
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Abstract
The utility model discloses a kind of light sensation detector circuit, including silicon photoelectric diode, dual operational amplifier, filter circuit, 6th resistance and the 8th resistance, the anode of silicon photoelectric diode connects operating voltage, negative electrode is connected with one end of filter circuit and the first inverting input of dual operational amplifier respectively, the other end of filter circuit and the first output end of dual operational amplifier connect, first output end of dual operational amplifier is connected after passing sequentially through the 8th resistance and the 6th resistance with the second inverting input of dual operational amplifier, second output end of dual operational amplifier is as signal output part.The utility model high sensitivity, reaction speed are fast, low noise and low cost, can be widely applied in field of photodetection.
Description
Technical field
Light sensation detector field is the utility model is related to, more particularly to a kind of light sensation detector circuit.
Background technology
With the development of science and technology various instrument and equipments are by a large amount of development and application to various productions, operation, service, life field
In institute, greatly provide conveniently.Display device is used as a wherein important part, and its performance has high requirement.At present, to aobvious
Show one of test content of equipment, be the image switch speed for testing display device during video image is shown, because
This passes through the switching slot that photo-detector detects adjacent image, it is necessary to detected using photo-detector, obtains image switching
Speed.Current light detector circuit, if to reach faster reaction speed, generally require the core using very high degree of precision rank
Piece, cause cost higher, and use the detection chip of general precision, then may be by larger influence of noise, and react speed
Spend slowly, testing requirements can not be met.
Utility model content
In order to solve above-mentioned technical problem, the purpose of this utility model is to provide a kind of light sensation detector circuit.
Technical scheme is used by the utility model solves its technical problem：
A kind of light sensation detector circuit, including silicon photoelectric diode, dual operational amplifier, filter circuit, the 6th resistance and
8th resistance, the anode of the silicon photoelectric diode connect operating voltage, and negative electrode is put with one end of filter circuit and double computings respectively
The first inverting input connection of big device, the other end of the filter circuit and the first output end of dual operational amplifier connect,
First output end of the dual operational amplifier passes sequentially through second with dual operational amplifier after the 8th resistance and the 6th resistance
Inverting input connects, and the second output end of the dual operational amplifier is as signal output part.
Further, it is also associated with the 7th between the second inverting input of the dual operational amplifier and its second output end
Resistance.
Further, in addition to second resistance and 3rd resistor, a termination logic power of the 3rd resistor, the other end lead to
Cross second resistance ground connection, and the connecting node between second resistance and 3rd resistor and the anode connection of silicon photoelectric diode.
Further, the filter circuit uses RC filter circuits.
Further, the RC filter circuits include the first electric capacity, the second electric capacity, the 3rd electric capacity and first resistor, and described
In parallel with the 3rd electric capacity after one electric capacity and the series connection of the second electric capacity, the first resistor is in parallel with the 3rd electric capacity, and first electricity
One end of resistance and the first inverting input of dual operational amplifier connect, and the first output end of the other end and dual operational amplifier connects
Connect.
Further, the dual operational amplifier uses model TL082CD chip.
Further, the silicon photoelectric diode uses model BPW21R device.
The beneficial effects of the utility model are：A kind of light sensation detector circuit of the present utility model, including the pole of silicon photoelectricity two
Pipe, dual operational amplifier, filter circuit, the 6th resistance and the 8th resistance, the anode of silicon photoelectric diode connect operating voltage, negative electrode
It is connected respectively with one end of filter circuit and the first inverting input of dual operational amplifier, the other end of filter circuit and double fortune
The first output end connection of amplifier is calculated, after the first output end of dual operational amplifier passes sequentially through the 8th resistance and the 6th resistance
It is connected with the second inverting input of dual operational amplifier, the second output end of dual operational amplifier is as signal output part.This
Circuit sensitivity is high, reaction speed is fast, low noise and low cost, can meet detection demand.
Brief description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and examples.
Fig. 1 is the circuit diagram of light sensation detector circuit of the present utility model.
Embodiment
Reference picture 1, a kind of light sensation detector circuit, including silicon photoelectric diode D1, dual operational amplifier U1, filtered electrical
Road, the 6th resistance R6 and the 8th resistance R8, the anode of the silicon photoelectric diode D1 connect operating voltage, negative electrode respectively with filtered electrical
The one end on road connects with dual operational amplifier U1 the first inverting input, the other end of the filter circuit and double operation amplifiers
Device U1 the first output end connection, the first output end of the dual operational amplifier U1 pass sequentially through the electricity of the 8th resistance R8 and the 6th
It is connected after resistance R6 with dual operational amplifier U1 the second inverting input, the second output end conduct of the dual operational amplifier U1
Signal output part SIGNAL_OUT.
It is further used as preferred embodiment, the second inverting input of the dual operational amplifier U1 is second defeated with it
Go out between holding and be also associated with the 7th resistance R7.
It is further used as preferred embodiment, in addition to second resistance R2 and 3rd resistor R3, the 3rd resistor R3
One termination logic power VCC, the other end is grounded by second resistance R2, and the company between second resistance R2 and 3rd resistor R3
The anode that node is connect with silicon photoelectric diode D1 is connected.Second resistance R2 and 3rd resistor R3 forms bleeder circuit, by that will patrol
Collect power supply VCC and carry out partial pressure, so as to the operating voltage using the voltage on R3 as silicon photoelectric diode.
Preferably, dual operational amplifier U1 the first output end is also grounded by the 4th resistance R4, and the second output end is also logical
Cross the 5th resistance eutral grounding.Dual operational amplifier U1 the first in-phase input end and the second in-phase input end is grounded.
Preferred embodiment is further used as, the filter circuit uses RC filter circuits.
Preferred embodiment is further used as, the RC filter circuits include the first electric capacity C1, the second electric capacity C2, the 3rd
Electric capacity C3 and first resistor R1, the first electric capacity C1 and the second electric capacity C2 are in parallel with the 3rd electric capacity C3 after connecting, and described first
Resistance R1 is in parallel with the 3rd electric capacity C3, and one end of the first resistor R1 and dual operational amplifier U1 the first inverting input
Connection, the other end are connected with dual operational amplifier U1 the first output end.
Preferred embodiment is further used as, the dual operational amplifier U1 uses model TL082CD chip.
Preferred embodiment is further used as, the silicon photoelectric diode D1 uses model BPW21R device.
BPW21R is a plane silicon semiconductor device, and there is high sensitivity, fast response time, and its spectrum to sense sensitive model
It is trapped among in visible-range, be particularly suitable for use in the optical detection that illumination and image are shown.
The utility model, silicon photoelectric diode D1 negative electrode, namely silicon photoelectric diode D1 output end, pass through filtered electrical
Road is connected with dual operational amplifier U1 the first inverting input, the output signal that filter circuit exports to silicon photoelectric diode D1
Carry out noise filtering, reduce the clutter and burr of output signal, by parallel with C3 after C1 and C2 series connection, then with first resistor R1
Mode in parallel forms RC filter circuits, and three electric capacity C1, C2 and C3 are combined in the utility model, can be according to actual circuit need
The size for adjusting each electric capacity is asked to finally give the capacitance of needs.After light shines BPW21R, BPW21R electric signals are produced, should
Electric signal after circuit filtering, is input to dual operational amplifier U1 the first inverting input, i.e. pin 2 after filtering, then, from
Signal after dual operational amplifier U1 the first output end output amplification first, the signal after filtered circuit filtering, lead to again
Cross after the 8th resistance R8 and the 6th resistance R6 and be input to dual operational amplifier U1 the second inverting input and carry out two level amplification, it is double
Operational amplifier U1 the second output end is as the light sensation detectable signal after signal output part output two level amplification.The utility model
Second amplifying circuit is formed using dual operational amplifier U1, can be big signal low level signal amplification, improve the sensitive of optical detection
Degree, so that this circuit has faster corresponding speed.And this circuit, using lower cost silicon photoelectric diode D1 and
Dual operational amplifier U1 forms light sensation detection circuit, can meet answering for fast high sensitivity, reaction speed, low noise and low cost
Use demand.
Above is preferably implement to be illustrated to of the present utility model, but the invention is not limited to the reality
Example is applied, those skilled in the art can also make a variety of equivalent variations on the premise of without prejudice to the utility model spirit
Or replace, these equivalent modifications or replacement are all contained in the application claim limited range.
Claims (7)
1. a kind of light sensation detector circuit, it is characterised in that including silicon photoelectric diode, dual operational amplifier, filter circuit,
Six resistance and the 8th resistance, the anode of the silicon photoelectric diode connect operating voltage, negative electrode respectively with one end of filter circuit and
The first inverting input connection of dual operational amplifier, the first output of the other end and dual operational amplifier of the filter circuit
End connection, the first output end of the dual operational amplifier pass sequentially through after the 8th resistance and the 6th resistance with dual operational amplifier
The second inverting input connection, the second output end of the dual operational amplifier is as signal output part.
2. light sensation detector circuit according to claim 1, it is characterised in that the second of the dual operational amplifier is anti-phase
The 7th resistance is also associated between input and its second output end.
3. light sensation detector circuit according to claim 1, it is characterised in that also including second resistance and 3rd resistor,
One termination logic power of the 3rd resistor, the other end are grounded by second resistance, and between second resistance and 3rd resistor
Connecting node and silicon photoelectric diode anode connect.
4. the light sensation detector circuit according to any one of claims 1 to 3, it is characterised in that the filter circuit uses
RC filter circuits.
5. light sensation detector circuit according to claim 4, it is characterised in that the RC filter circuits include the first electricity
Appearance, the second electric capacity, the 3rd electric capacity and first resistor, institute in parallel with the 3rd electric capacity after the first electric capacity and the second electric capacity series connection
State that first resistor is in parallel with the 3rd electric capacity, and the first inverting input of one end of the first resistor and dual operational amplifier connects
Connect, the first output end connection of the other end and dual operational amplifier.
6. light sensation detector circuit according to claim 1, it is characterised in that the dual operational amplifier uses model
TL082CD chip.
7. light sensation detector circuit according to claim 1, it is characterised in that the silicon photoelectric diode uses model
BPW21R device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720386231.XU CN206683759U (en) | 2017-04-13 | 2017-04-13 | A kind of light sensation detector circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720386231.XU CN206683759U (en) | 2017-04-13 | 2017-04-13 | A kind of light sensation detector circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206683759U true CN206683759U (en) | 2017-11-28 |
Family
ID=60400212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720386231.XU Active CN206683759U (en) | 2017-04-13 | 2017-04-13 | A kind of light sensation detector circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206683759U (en) |
-
2017
- 2017-04-13 CN CN201720386231.XU patent/CN206683759U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: Room 429, Creative Center, No. 69 Spectra West Road, Huangpu District, Guangzhou City, Guangdong Province, 510000 Patentee after: GUANGZHOU SHANGFENG INTELLIGENT TECHNOLOGY Co.,Ltd. Address before: Room 710, Building A1, No. 112 Science Avenue, High tech Industrial Development Zone, Guangzhou, Guangdong Province, 510430 Patentee before: GUANGZHOU SHANGFENG INTELLIGENT TECHNOLOGY Co.,Ltd. |