CN102841322A - Light source detection circuit - Google Patents
Light source detection circuit Download PDFInfo
- Publication number
- CN102841322A CN102841322A CN 201110171325 CN201110171325A CN102841322A CN 102841322 A CN102841322 A CN 102841322A CN 201110171325 CN201110171325 CN 201110171325 CN 201110171325 A CN201110171325 A CN 201110171325A CN 102841322 A CN102841322 A CN 102841322A
- Authority
- CN
- China
- Prior art keywords
- triode
- resistance
- light source
- connects
- collector
- 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
Landscapes
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
The invention discloses a light source detection circuit, which comprises a photistor, a first triode, a second triode and a third triode, wherein a working power source is connected with a collector electrode of the photistor, an emitting electrode of the photistor is connected with a base electrode of the first triode, a collector electrode of the first triode is connected with a base electrode of the third triode through a third resistor and a fourth resistor which are connected in series, an emitting electrode of the first triode is connected with a base electrode of the second triode, a collector electrode of the third triode is connected with a sixth resistor, and the sixth resistor is grounded through a second ceramic capacitor; and the emitting electrode of the photistor is grounded through a first resistor, a collector electrode of the second triode is connected with the working power source through a second resistor, and the collector electrode of the third triode is connected with the working power source through a fifth resistor. The light source detection circuit disclosed by the invention has a simple structure, is convenient to use, and can be used for detecting the power source.
Description
Technical field
The present invention relates to a kind of application circuit, concrete relate to a kind of light source detection circuit.
Background technology
If can modulate light emitting diode or other light source, so just can eliminate the dark current that receives optical sensor and the drift of amplifier, so light source need carry out the detection of necessity.The conventional lighting sources testing circuit is varied of a great variety, but most complex structure, function is complicated; And only need under the application scenario of function singleness at some, adopt the driving circuit of complicated circuit construction to accomplish the power supply measuring ability of simple function often, cost can increase so on the one hand; In addition on the one hand; After circuit structure was in a single day complicated, its labile factor was behind so just reducing product percent of pass virtually also increasing.
Summary of the invention
For overcoming deficiency of the prior art, the object of the present invention is to provide a kind of light source detection circuit simple in structure.
In order to solve the problems of the technologies described above, realize above-mentioned purpose, the present invention has adopted following technical scheme:
A kind of light source detection circuit; Comprise a phototriode, first triode, second triode and the 3rd triode; Working power connects the collector of said phototriode; The emitter of said phototriode connects the base stage of said first triode, and the collector of said first triode is connected the base stage of said the 3rd triode through the 3rd resistance of series connection with the 4th resistance, and the emitter of said first triode connects the base stage of said second triode; The collector of said the 3rd triode connects the 6th resistance, and said the 6th resistance is through the second ceramic disc capacitor ground connection; The emitter of said phototriode is through first resistance eutral grounding, and the collector of said second triode connects said working power through second resistance, and the collector of said the 3rd triode connects said working power through the 5th resistance.
Further, the link of said the 3rd resistance and said the 4th resistance is through the first ceramic disc capacitor ground connection.
The course of work of light source detection circuit of the present invention is following:
When said working power is high level; Said phototriode conducting; Under said working power effect, said first triode and the said second triode conducting are after high level signal is exported through the said second ceramic disc capacitor filtering; Be input to the base stage of said the 3rd triode again through the 4th resistance current limliting, said the 3rd triode conducting is exported an amplifying signal later on through the 6th resistance and the second ceramic disc capacitor filtering later on again.
The present invention has the following advantages:
Light source detection circuit of the present invention simple in structure, easy to use.
Above-mentioned explanation only is the general introduction of technical scheme of the present invention, understands technological means of the present invention in order can more to know, and can implement according to the content of instructions, below with preferred embodiment of the present invention and conjunction with figs. specify as after.Embodiment of the present invention is provided by following examples and accompanying drawing thereof in detail.
Description of drawings
Fig. 1 is the circuit theory diagrams of light source detection circuit of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment technology implementation process of the present invention is further specified.
Referring to shown in Figure 1; A kind of light source detection circuit; Comprise a phototriode Q0, the first triode Q1, the second triode Q2 and the 3rd triode Q3, working power V1 connects the collector of said phototriode Q0, and the emitter of said phototriode Q0 connects the base stage of the said first triode Q1; The collector of the said first triode Q1 is connected the base stage of said the 3rd triode Q3 with the 4th resistance R 4 through the 3rd resistance R 3 of series connection; The emitter of the said first triode Q1 connects the base stage of the said second triode Q2, and the collector of said the 3rd triode Q3 connects the 6th resistance R 6, and said the 6th resistance R 6 is through the second ceramic disc capacitor C2 ground connection; The emitter of said phototriode Q0 is through first resistance R, 1 ground connection, and the collector of the said second triode Q2 connects said working power V1 through second resistance R 2, and the collector of said the 3rd triode Q3 connects said working power V1 through the 5th resistance R 5.
Further, said the 3rd resistance R 3 is passed through the first ceramic disc capacitor C1 ground connection with the link of said the 4th resistance R 4.
The foregoing description just is to let the one of ordinary skilled in the art can understand content of the present invention and enforcement according to this in order technical conceive of the present invention and characteristics to be described, to be its objective is, can not limit protection scope of the present invention with this.The variation or the modification of every equivalence that the essence of content has been done according to the present invention all should be encompassed in protection scope of the present invention.
Claims (2)
1. light source detection circuit; Comprise a phototriode (Q0), first triode (Q1), second triode (Q2) and the 3rd triode (Q3); It is characterized in that: working power (V1) connects the collector of said phototriode (Q0); The emitter of said phototriode (Q0) connects the base stage of said first triode (Q1); The collector of said first triode (Q1) is through the 3rd resistance of series connection, the base stage that the 4th resistance (R3, R4) connects said the 3rd triode (Q3); The emitter of said first triode (Q1) connects the base stage of said second triode (Q2), and the collector of said the 3rd triode (Q3) connects the 6th resistance (R6), and said the 6th resistance (R6) is through second ceramic disc capacitor (C2) ground connection; The emitter of said phototriode (Q0) is through first resistance (R1) ground connection; The collector of said second triode (Q2) connects said working power (V1) through second resistance (R2), and the collector of said the 3rd triode (Q3) connects said working power (V1) through the 5th resistance (R5).
2. according to claims 1 described light source detection circuit, it is characterized in that: said the 3rd resistance (R3) passes through first ceramic disc capacitor (C1) ground connection with the link of said the 4th resistance (R4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110171325 CN102841322A (en) | 2011-06-23 | 2011-06-23 | Light source detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110171325 CN102841322A (en) | 2011-06-23 | 2011-06-23 | Light source detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102841322A true CN102841322A (en) | 2012-12-26 |
Family
ID=47368860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110171325 Pending CN102841322A (en) | 2011-06-23 | 2011-06-23 | Light source detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102841322A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103532535A (en) * | 2013-10-23 | 2014-01-22 | 成都市宏山科技有限公司 | Simple light guide switching circuit |
-
2011
- 2011-06-23 CN CN 201110171325 patent/CN102841322A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103532535A (en) * | 2013-10-23 | 2014-01-22 | 成都市宏山科技有限公司 | Simple light guide switching circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108152557A (en) | Sample circuit is isolated in a kind of feedback current | |
| CN204989290U (en) | Wide dynamic range's high -pressure side current detection circuit | |
| CN204291474U (en) | LED illumination drive unit and the vehicle with this drive unit | |
| CN102841322A (en) | Light source detection circuit | |
| CN205864388U (en) | A kind of Novel DC voltage isolation circuit | |
| CN202166731U (en) | Light source detection circuit | |
| CN103558447B (en) | A kind of no-voltage control circuit for tiny signal | |
| CN203534700U (en) | Light intensity detection circuit | |
| CN203135890U (en) | Light receiver | |
| CN202771295U (en) | Voltage stabilizing circuit | |
| CN103674241A (en) | Photosensitive circuit for detecting photosensitive signal | |
| CN203590236U (en) | Automatic optical power control device | |
| CN202918246U (en) | Preposed charge amplifier with low noise | |
| CN103115635B (en) | Double-channel frequency division photoelectric signal detection circuit | |
| CN202153348U (en) | Photoelectric detection circuit for infrared touch screen | |
| CN208509311U (en) | A kind of LED dimming power source measure and control device | |
| CN203934071U (en) | A kind of transmitting illuminant control circuit | |
| CN202840472U (en) | Leakage protector | |
| CN201488809U (en) | Signal amplifying circuit for automatically removing stray light and photo-electric drift of spectrometer | |
| CN204314362U (en) | A kind of linear voltage sample circuit | |
| CN205562669U (en) | Cross voltage detection circuit | |
| CN201056654Y (en) | Laser type dynamic yarn prober | |
| CN102843632A (en) | Voice-operated circuit | |
| CN104426125A (en) | Overvoltage protection circuit and lamp with overvoltage protection function | |
| CN103458552A (en) | LED lamp and start control circuit thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121226 |