All Questions
Tagged with analog optoelectronics
6 questions
0
votes
2
answers
88
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Saturating BJT in emitter follower
Can we saturate the BJT in emitter follower configuration by increasing base current? If yes, what happens in the process? How does increase in collector current decrease \$V_{CE}\$ when there is no ...
- 63
0
votes
1
answer
86
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Current measurement from constant current source
I have a constant current circuit using an op amp circuit. I am implementing a current of 21 mA to drive a laser.
Spec of laser: https://www.thorlabs.com/thorproduct.cfm?partnumber=L650P007
I would ...
- 101
3
votes
3
answers
1k
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Position of current limiting resistor
I am designing a digital output circuit.
I got confused about the position of the current limiting resistor of the transistor.
I would like know where it should be. (After or before the pull up ...
- 176
0
votes
0
answers
77
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Photodiode, analog electronic
I am a beginner PSPICE, in simulation electrical and electronics circuits. I want to simulate a schematic with the program Micro-CAP 12. I want to look for some graphics from a photodiode PIN which ...
- 11
1
vote
1
answer
200
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Is this opto input current sized wrong and can it have such symptoms?
I have been using 4N26 opto for some time for a trigger input of a module. Vin is fixed 40Hz 0..5V pulse with %50 duty cycle. OUT goes to trigger of a module.
Below is the schematics:
Among ...
- 1,504
0
votes
3
answers
678
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Relation between collector current and IF current in an optocoupler?
I need to use an optocoupler to drive BJT. BJT will let 10 A current pass. BJT's have commonly 100 - 150 Bf(current gain) so for 10A transmission I need at least 100 mA current draw from the ...
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