68 votes 68 votes Minimum No of Gates NAND/NOR Ex-OR Ex-Nor Half Adder Half Subtractor Full Adder Full Subtractor NAND ? ? ? ? ? ? NOR ? ? ? ? ? ? Digital Logic digital-logic min-no-gates + – bahirNaik asked Dec 17, 2015 retagged May 27, 2021 by Shiva Sagar Rao bahirNaik 82.2k views answer comment Share Follow See all 0 reply Please log in or register to add a comment.
Best answer 117 votes 117 votes Minimum Number of Gates: Nand/Nor Exor Exnor Half Adder Half Subtractor Full Adder Full Subtractor $NAND$ $4$ $5$ $5$ $5$ $9$ $9$ $NOR$ $5$ $4$ $5$ $5$ $9$ $9$ Exor Using Nand Gates Exor Using Nor Gates Ex-Nor using Nand Gates Ex-Nor using Nor Gates Half Adder using Nand Gates Half Adder Using Nor Gates Half Subtractor using Nand Gates Half Subtractor using Nor gates Full Adder using Nand Gates Full Adder using Nor gates Full Subtractor using Nand Gates Full Subtractor using Nor Gates Praveen Saini answered Dec 19, 2015 selected Dec 19, 2015 by bahirNaik Praveen Saini comment Share Follow See all 11 Comments See all 11 11 Comments reply Show 8 previous comments Prince Sindhiya commented Oct 6, 2018 reply Follow Share best explained 0 votes 0 votes srestha commented Aug 10, 2019 reply Follow Share @Praveen Saini Sir If complement also present , then only $3$ NOR gates for EX-NOR right?? like , for $A$ and $B$ input $\left ( AB'+A'B \right )'$=> $3$ NOR gates. Lessthan $3$ not possible. right?? 0 votes 0 votes Praveen Saini commented Aug 10, 2019 reply Follow Share @srestha right. 1 votes 1 votes Please log in or register to add a comment.
2 votes 2 votes EX-OR EX-NOR HALF ADD HALF SUB FULL ADD FULL SUB NAND 4 5 5 5 9 9 NOR 5 4 5 5 12 12 James avula answered Aug 21, 2018 James avula comment Share Follow See all 0 reply Please log in or register to add a comment.
2 votes 2 votes gates nand nor not 1 1 and 2 3 or 3 2 xor 4 5 exnor 5 4 This is the best TIPS: If they ask NAND gates, use Sum of Products If they ask NOR gates, use Product of sums Goodbye shashankrustagi answered Feb 9, 2021 shashankrustagi comment Share Follow See 1 comment See all 1 1 comment reply Gatestriver commented Aug 16, 2022 reply Follow Share How to use these tips 0 votes 0 votes Please log in or register to add a comment.
0 votes 0 votes EX- OR : 4 NAND, 5 NOR EX- NOR: 5 NAND, 4 NOR Half Adder, Half Subtractor: 5 NAND, 5 NOR Full Adder, Full Subtractor: 9 NAND, 9 NOR RoyArun answered Apr 18, 2020 RoyArun comment Share Follow See all 0 reply Please log in or register to add a comment.