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Diode Bias Circuits
How do opto electronics obtain high speed.?
The specs for most LEDs and photo diodes show 100's of nanosec or even u-seconds of rise/fall times but the circuitry which uses them can operate at 100's of megaHz. I would think that they must be biased with some current so avoid storage time problems. Do these circuits use some sort of active gain control to keep them biased around this state?
James H. Why do you even bother responding with such a weird answer? you must have a lot of wasted idle time on your hands.
LEDs and Photo diodes do have great speed. Optoelectronics are particularly useful in places where a lot of EMI/EMC may be encountered. The reason why they don't speed up you design a great deal, if at all, is that the interface to go from electrical to light only works as fast as traditional electrons. Sure you can get from point A to B fast, but you have to move slowly on and off the escalator, so to speak.
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Diode Lasers and Photonic Integrated Circuits $15 No Synopsis Available |
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The Anatomy of Bias: How Neural Circuits Weigh the Options $29.25 No Synopsis Available |
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Diode Lasers and Photonic Integrated Circuits, 2nd Edition $131.63 No Synopsis Available |
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The Anatomy of Bias By Lauwereyns, Jan $25.74 Author: Lauwereyns, Jan Subtitle: How Neural Circuits Weigh the Options Publication Date: 2011/08/19 Number of Pages: 262 Binding Type: Paperback Language: English Depth: 0.75 Width: 6.75 Height: 8.75 |
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Bias Soundsaver $49.95 Bias Soundsaver |
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Bias $21.39 An Emmy Award-winning CBS broadcast journalist turns his analytic eye on his own industry in this investigation of broadcast news. Here he suggests that television news is biased toward the political left. |
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Bias Stripe Polo $69.5 Bias Stripe Polo |
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Bias SOUNDSOAP PRO 2 $499 Bias SOUNDSOAP PRO 2 |
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do u think it works or shorts....?
i have made this circuit,u may think its silly,(hartely osc) can u tell me is there any shorting in the circuit..and u ca see there is a varicap...and 5volts biases the diode,do u think the varicap is properly biased by 5 volts..
and do u think the signal amplitude varies the capacitance of the Varicap,in changing the frequency..
..tell me ur opinion...
(only for educational purposes..)
" http://images.elektroda.net/59_1280529166.jpg "
please help me out..
It looks like it could work. Whether it will or not depends on how well you build it, so be meticulous. I'd be more inclined to use a 2N3553 transistor instead of a 2N2222, but perhaps that's just me being too conservative.
The nominal reverse bias voltage for a MV2201 is 4 Volts, but, again, 5V should work as well (slightly lower capacitance, thus higher center frequency).
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