Diodes connected in parallel would act like an
- an NAND gate.
- an AND gate.
- an OR gate.
Explanation
With diodes connected in parallel (anodes to separate inputs, cathodes to a common output through a load), a high level on any one input forward-biases its diode and drives the output high, which is the OR function. A logic-1 on at least one input gives a logic-1 output, exactly as an OR gate behaves.
azfar92 asking:
Why is the answer AND gate? For example,you put 2 diodes parallel to each other. If the current flow through one of the diodes,wouldnt the circuit is still complete?
Community Comments (8)
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dimky Posts: 514 18.04.2013 / 12:27
Hello.
I agree with you. Changed to "OR".
I agree with you. Changed to "OR".
A
azfar92 Posts: 6 08.05.2013 / 22:47
Thank you.. :)
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MridulDev Posts: 48 13.05.2013 / 08:43
With all due respect, please don't miss-guide the peoples.
Answer has to be an AND gate in this case, if you want to know more send me a free subscription ;)
P.S: There are no diagrams given for this question.
Answer has to be an AND gate in this case, if you want to know more send me a free subscription ;)
P.S: There are no diagrams given for this question.
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dimky Posts: 514 15.05.2013 / 16:41
Hello MridulDev.
There is no additional information about how this diodes are biased, do they have additional power source and so on... So, just electrically, if we have two diodes connected in parallel, they act as OR gate, until there is no additional info. This is my IMHO.
Sure, if study more deeply how AND gate is implemented, we see what they are connected in parallel indeed, but there is some more additional details. :)
If azfar want to to get some info, check this: http://en.wikipedia.org/wiki/Diode_logic
There is no additional information about how this diodes are biased, do they have additional power source and so on... So, just electrically, if we have two diodes connected in parallel, they act as OR gate, until there is no additional info. This is my IMHO.
Sure, if study more deeply how AND gate is implemented, we see what they are connected in parallel indeed, but there is some more additional details. :)
If azfar want to to get some info, check this: http://en.wikipedia.org/wiki/Diode_logic
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MridulDev Posts: 48 17.05.2013 / 14:01
Can you share a figure of two diodes in parallel then, to be more clear :)
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dimky Posts: 514 17.05.2013 / 21:09
Check link what I gave. :) There are two figures, for AND and OR gate. In both figures they are connected in parallel but in AND gate they are reverse biased and pulled up. :)
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MridulDev Posts: 48 20.05.2013 / 15:03
Okay, Gr8 , Thanks :)
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zoom77 Posts: 6 28.09.2017 / 15:15
question should specify.....diodes connected in parallel and forward biased....i think
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