why we use visible spectrum for FSO (free space optic),although it seems strange that when we have to communicate in urban areas then too much light will be in atmosphere for the sake of communication.

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Hey all, i have a circuit that contains a diode and 2 resistors here is a link to the image http://img46.imageshack.us/img46/2562/41930604.png what i am think is that VL = 0.7V because of the silicon diode so IL = 0.7/750*10^-3 = 0.9333 mA and V0 = 0.7V but i am not sure of my answerer

2 Answers  

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syllabus for elactronics and comm. engg. for the written of Airport authority of India for the post Jr.Exicutive (Electronics)

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What is barkhausen criteria?

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can you give me example of igbt drive circuit... i still not under stand how it can be design with certain equation using mathlab program...

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why the crystal frequency of 8051 is divide by 12 for its working?

4 Answers  

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I am an Engg[ECE] 4th yr student. I have been short listed for Indian Navy screening interview for Short Service Commission. What sort of questions are asked there????

1 Answers   Indian Navy, Samsung,

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What is flash memory?

3 Answers   Amdocs,

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16 grams of radioactive material decays into 8 grams in 10 years. How long will it take to decay to 1 gram?

11 Answers   Hexaware,

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What is DTX? Why is it used?

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How do the transition region width and contact potential across a p-n junction vary with the applied bias voltage?

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Define noise in modulation?

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