CN207835860U - Light emitting diode tune stream driving circuit - Google Patents
Light emitting diode tune stream driving circuit Download PDFInfo
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- CN207835860U CN207835860U CN201721727050.5U CN201721727050U CN207835860U CN 207835860 U CN207835860 U CN 207835860U CN 201721727050 U CN201721727050 U CN 201721727050U CN 207835860 U CN207835860 U CN 207835860U
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- 230000011664 signaling Effects 0.000 claims abstract description 26
- 239000003990 capacitor Substances 0.000 claims description 6
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- 239000000835 fiber Substances 0.000 abstract description 7
- 230000007423 decrease Effects 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 241001025261 Neoraja caerulea Species 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 239000013308 plastic optical fiber Substances 0.000 description 1
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Abstract
The utility model discloses a kind of light emitting diode tune stream driving circuits, including LED, the second current-limiting resistance R2, the first current-limiting resistance R1 and signaling switch pipe Q1；The anode of LED is connect with input power, and LED cathode are electrically connected by the second current-limiting resistance R2 with the input terminal of signaling switch pipe Q1；The output end of signaling switch pipe Q1 is grounded；The signal input part of signaling switch pipe Q1 connects data-signal；One end of first current-limiting resistance R1 is electrically connected with LED cathode, the other end ground connection of the first current-limiting resistance R1.It in the LED tune stream driving circuits, is not exclusively turned off using LED, so that LED light intensity is reached and do not receive, increase the electric current for flowing through LED when signaling switch pipe Q1 is connected, LED is in highlighted；Reduce the electric current for flowing through LED when the Q1 shutdowns of signaling switch pipe, LED is in glimmer；Meanwhile the modulation bandwidth of common LED can be improved with the circuit, and can be used for 100,000,000 fiber optic communications, decline to a great extent optical communication module use cost.
Description
Technical field
The utility model is related to opto-electronic conversion field more particularly to a kind of light emitting diode tune stream driving circuits.
Background technology
At this stage, in short distance fiber optic communication, light source all uses resonant cavity light emitting diodes
(RCLED:Resonant Cavity Light Emitting Diode), it is a kind of novel light-emitting diode
(LED) structure, the advantages of being provided simultaneously with both traditional LED and planar laser with vertical cavity (VCSEL)；In view of these of RCLED
Feature, has also resulted in its market price height, and most of for external production, and RCLED transmission speeds are low, the factors such as of high cost,
The market for all limiting it is widely used, and also counteracts the development of fiber optic communication.
Utility model content
Based on the above issues, problem to be solved in the utility model is to provide a kind of is realized using common LED
The widely used light emitting diode tune stream driving circuit in the be unfavorable for markets RCLED.
The technical solution of the utility model is as follows：
A kind of light emitting diode tune stream driving circuit, including LED, the second current-limiting resistance R2, the first current-limiting resistance R1 and
Signaling switch pipe Q1；The anode of LED is connect with input power, and LED cathode pass through the second current-limiting resistance R2 and signaling switch pipe Q1
Input terminal electrical connection；The output end of signaling switch pipe Q1 is grounded；The signal input part of signaling switch pipe Q1 connects data-signal；The
One end of one current-limiting resistance R1 is electrically connected with LED cathode, the other end ground connection of the first current-limiting resistance R1.
The light emitting diode tune stream driving circuit, wherein further include be connected in parallel it is low between input power and ground
Frequency decoupling capacitor C1.
The light emitting diode tune stream driving circuit, wherein further include the height being connected in parallel between input power and ground
Frequency decoupling capacitor C2.
The light emitting diode tune stream driving circuit, wherein the signaling switch pipe Q1 is metal-oxide-semiconductor or triode.
The light emitting diode (LED) of the utility model adjusts stream driving circuit, increases when signaling switch pipe Q1 is connected and flows through LED
Electric current, LED is in highlighted；Reduce the electric current for flowing through LED when the Q1 shutdowns of signaling switch pipe, LED is in its corresponding light of glimmer
Change by force small, rising edge, failing edge time can drop to 2ns, and modulation bandwidth can reach 100M.And present LED specifications,
Light intensity rising edge, failing edge time can be more than 15ns, and corresponding bandwidth does not exceed 20MHz.Therefore, to flow through electric current using LED small
When, so that LED light intensity is reached and do not receive, when electric current reaches maximum current, LED can rapidly switch to energy most
Strong luminous intensity.Meanwhile the modulation bandwidth of common LED can be improved with the circuit, and can be used for 100,000,000 fiber optic communications, substantially under
Drop uses the cost of light communication module group now, is conducive to market and is widely used to promote.
Low using common LED price, manufacturer is more, but its modulation bandwidth lower limit its be widely used, this practicality is new
Type solves that its modulation bandwidth is low using driving circuit, the low problem of transmission speed.
Description of the drawings
Fig. 1 is that light emitting diode (LED) driving circuit structure of the utility model is illustrated；
Fig. 2 be existing LED tune stream driving circuit figure pressure regulation after light intensity and time variation tooth form figure；
Fig. 3 be the utility model LED tune stream driving circuit figures pressure regulation after light intensity and time variation tooth form figure.
Specific implementation mode
Below in conjunction with the accompanying drawings, the preferred embodiment of the utility model is described in further detail.
As shown in Figure 1, a kind of light emitting diode (LED) provided by the utility model adjusts stream driving circuit comprising LED,
Second current-limiting resistance R2, the first current-limiting resistance R1 and signaling switch pipe Q1；The anode of LED is connect with input power, LED cathode
It is electrically connected with the input terminal of signaling switch pipe Q1 by the second current-limiting resistance R2；The output end of signaling switch pipe Q1 is grounded；Signal
The signal input part of switching tube Q1 connects data-signal (DATA)；One end of first current-limiting resistance R1 is electrically connected with LED cathode, and first
The other end of current-limiting resistance R1 is grounded.
In above-mentioned LED tune stream driving circuit, the first current-limiting resistance R1 adjusts LED minimum running currents, is equivalent to LED glimmers
When electric current；Second current-limiting resistance R2 adjusts LED maximum operating currenbts, be equivalent to LED it is bright by force when electric current.
In above-mentioned LED tune stream driving circuit, signaling switch pipe Q1 provides current path when bright by force for LED；Work as signaling switch
When the Enable Pin input data signal (DATA) of pipe Q1 is 0, the Q1 shutdowns of signaling switch pipe, the upper electric currents of LED are minimum currents, at this time
LED is in glimmer state；When the signal input part input data signal (DATA) of signaling switch pipe Q1 is 1, signaling switch pipe
Q1 is connected, and the upper electric currents of LED are maximum currents, and LED is in strong bright state.
In this way, increasing the electric current for flowing through LED when the Q1 conductings of signaling switch pipe, LED is in highlighted；The Q1 shutdowns of signaling switch pipe
When reduce and flow through the electric current of LED, LED be in glimmer, its corresponding light intensity changes small, and rising edge, failing edge time can drop
To 2ns, modulation bandwidth can reach 100M, as shown in Figure 3.And present LED specifications, light intensity rising edge, the meeting of failing edge time
More than 15ns, corresponding bandwidth does not exceed 20MHz, as shown in Figure 2.Therefore, electric current hour is flowed through using LED, makes LED light intensity
Reach and do not receive, when electric current reaches maximum current, energy rapidly can be switched to strongest luminous intensity by LED.Together
When, the modulation bandwidth of common LED can be improved with the circuit, and can be used for 100,000,000 fiber optic communications, decline to a great extent LED uses at
This, is conducive to market and is widely used to promote.
Further, in above-mentioned light emitting diode tune stream driving circuit, further include be connected in parallel input power (+5V) with
Low frequency decoupling capacitor C1 between ground (GND) plays the low frequency spur in removal input power, and stabilized supply voltage.
Further include being connected in parallel between input power and ground still further, in light emitting diode tune stream driving circuit
High frequency decoupling capacitor C2, play removal input power in high frequency spurs.
In above-mentioned light emitting diode tune stream driving circuit, preferred signals switching tube Q1 is metal-oxide-semiconductor or triode.
As shown in Figure 1, in the present embodiment, in fiber optic communication, actually blue-ray LED (BLED) is used to substitute common two
Pole pipe (LED) is used as illuminating source, if optical fiber uses commercial PMMA plastic optical fibers, to the light loss of feux rouges 650nm wavelength
Consumption is 150dB/km or so, and is 70dB/km~100dB/km or so for the light loss of a length of 430~560nm of light wave；Cause
This, this wavelength is the light of 430~560nm, and the light loss in optical fiber transmission process is less, greatly improves light in a fiber
Transmission range, can farthest reach 200m.
Certainly, in other embodiments, above-mentioned LED can also be red-light LED or other common light emitting diodes
(LED)。
It should be understood that the above-mentioned statement for the utility model preferred embodiment is more detailed, can not therefore and
It is considered the limitation to the utility model patent protection domain, the scope of patent protection of the utility model should be with appended claims
Subject to.
Claims (4)
1. a kind of light emitting diode tune stream driving circuit, which is characterized in that including LED, the second current-limiting resistance R2, the first current limliting electricity
Hinder R1 and signaling switch pipe Q1；The anode of LED is connect with input power, and LED cathode pass through the second current-limiting resistance R2 and signal
The input terminal of switching tube Q1 is electrically connected；The output end of signaling switch pipe Q1 is grounded；The signal input part of signaling switch pipe Q1 connects number
It is believed that number；One end of first current-limiting resistance R1 is electrically connected with LED cathode, the other end ground connection of the first current-limiting resistance R1.
2. light emitting diode tune stream driving circuit according to claim 1, which is characterized in that further include be connected in parallel it is defeated
Enter the low frequency decoupling capacitor C1 between power supply and ground.
3. light emitting diode tune stream driving circuit according to claim 1, which is characterized in that further include be connected in parallel it is defeated
Enter the high frequency decoupling capacitor C2 between power supply and ground.
4. light emitting diode tune stream driving circuit according to any one of claims 1 to 3, which is characterized in that the signal is opened
It is metal-oxide-semiconductor or triode to close pipe Q1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721727050.5U CN207835860U (en) | 2017-12-13 | 2017-12-13 | Light emitting diode tune stream driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721727050.5U CN207835860U (en) | 2017-12-13 | 2017-12-13 | Light emitting diode tune stream driving circuit |
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| Publication Number | Publication Date |
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| CN207835860U true CN207835860U (en) | 2018-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721727050.5U Active CN207835860U (en) | 2017-12-13 | 2017-12-13 | Light emitting diode tune stream driving circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107864535A (en) * | 2017-12-13 | 2018-03-30 | 刘向宁 | Light emitting diode adjusts stream drive circuit |
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2017
- 2017-12-13 CN CN201721727050.5U patent/CN207835860U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107864535A (en) * | 2017-12-13 | 2018-03-30 | 刘向宁 | Light emitting diode adjusts stream drive circuit |
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| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200717 Address after: 518052 Nanshan digital cultural industry base, No. 10128 Shennan Road, Guangdong, Shenzhen 2203, West Tower, Nanshan District Patentee after: Shenzhen Jiuyi photoelectric Co., Ltd Address before: 518052 Nanshan digital cultural industry base, No. 10128 Shennan Road, Guangdong, Shenzhen 2203, West Tower, Nanshan District Patentee before: Liu Xiangning |