I'm enrolled at a local technical college and am currently studying digital electronics. We have covered karnaugh maps and how to simplify them with grouping. We recently were tested on it and I got back my test and noticed that the teacher was in error about marking one of my questions wrong. Upon, pointing this out he proceeded to defend his point of view but I KNOW I'm correct. I have input the information in various karnaugh map simplification softwares and even found a neat javascript online simplifier but I don't think that is going to be good enough for him so can someone help me find some resources explaining why simplifying the way I did is correct? I have tried and I'm hoping people here can help me.
Here is the karnaugh map:
The simplified answer I got was: A + B' = X
I'll write it out in case anyone is unfamiliar with how I wrote it just now: A OR NOT B = X
I did this by grouping in this way:
In other words I grouped the bottom four and then took the bottom two and wrapped up to the top two for another group of four. My teacher claims that this is not possible and the top two should be grouped by themselves. I know it is possible however I don't have any sources to back it up as my logic and understanding of this is simply not justification enough for him even after I explained and demonstrated that software gives the same answer as me.
Can anyone help me please find some resources backing up my claim. At this point it isn't about points on my test (I get an A+ in the class either way). Its about teaching the proper way of simplifying karnaugh maps for the benefit of others who don't understand.
Thanks very much All About Circuits. I look forward to your responses and eagerly await them!
Sincerely,
Allen
PS the book we use is Digital Electronics: Principles and Applications sixth edition by Roger L Tokheim. I would have emailed Mr. Tokheim himself had I known his email address but no luck. If by some off chance he browses this forum it would be great for him to get in touch with me and somehow verify for me his identity. Thanks.
Here is the karnaugh map:
The simplified answer I got was: A + B' = X
I'll write it out in case anyone is unfamiliar with how I wrote it just now: A OR NOT B = X
I did this by grouping in this way:
In other words I grouped the bottom four and then took the bottom two and wrapped up to the top two for another group of four. My teacher claims that this is not possible and the top two should be grouped by themselves. I know it is possible however I don't have any sources to back it up as my logic and understanding of this is simply not justification enough for him even after I explained and demonstrated that software gives the same answer as me.
Can anyone help me please find some resources backing up my claim. At this point it isn't about points on my test (I get an A+ in the class either way). Its about teaching the proper way of simplifying karnaugh maps for the benefit of others who don't understand.
Thanks very much All About Circuits. I look forward to your responses and eagerly await them!
Sincerely,
Allen
PS the book we use is Digital Electronics: Principles and Applications sixth edition by Roger L Tokheim. I would have emailed Mr. Tokheim himself had I known his email address but no luck. If by some off chance he browses this forum it would be great for him to get in touch with me and somehow verify for me his identity. Thanks.