Monday, 4 May 2015

diodes exercise logic gates?


We have two circuits in the figure. For each find I and V. The answers are



  • 3 mA, 3V

  • 4mA +1 V


This isn't homework,before you tell me to add this to the homework.I just found this and I want to know how to solve this.They look similar to the logic gates,the first one to OR gate and the second to AND gate,but where do I go from there?


http://d.yimg.com/hd/answers/i/d7b3f80ff2a84f94aee9235060209fa6_A.jpeg?a=answers&mr=0&x=1384809801&s=99eb4c6770f14e7259a1448dd67f11b2




Answer



It's digital logic, 3 being High and 1 being Low, anything in between won't have much effect.


The left side is an OR gate. So its kinda like High or low = 1 or 0 = High High being 3 volts, and low being 2 or 1 volt relatively speaking.


In the latter, right side, is like an AND gate, So it's kinda like High and Low = 1 and 0 = 0 Again, High being 3 volts and Low being 1 volt.


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