3 votes 3 votes what should be A B and C for F = 1 ?? Digital Logic digital-logic ace-test-series digital-circuits + – Ismail asked Jan 14, 2018 • edited Mar 6, 2019 by Rishi yadav Ismail 1.0k views answer comment Share Follow See all 6 Comments See all 6 6 Comments reply Show 3 previous comments sumit goyal 1 commented Jan 14, 2018 reply Follow Share @Ismail how are you getting A correct explain plz seems D is correct 0 votes 0 votes MiNiPanda commented Jan 14, 2018 reply Follow Share @ismail thanks for the link. I didn't know this :) 1 votes 1 votes Ismail commented Jan 14, 2018 reply Follow Share Your welcome 0 votes 0 votes Please log in or register to add a comment.
1 votes 1 votes Option D is correct because direct input from options is not valid for F....... three inputs xnor will have minterms m (0,3,5,6)... Based on this check from the options given.. Kamal Raj Praveen answered Jan 14, 2018 Kamal Raj Praveen comment Share Follow See all 0 reply Please log in or register to add a comment.
0 votes 0 votes A , B ,C ARE giving output 1 and D giving zero i was doing mistake sumit goyal 1 answered Jan 14, 2018 sumit goyal 1 comment Share Follow See all 6 Comments See all 6 6 Comments reply Ismail commented Jan 14, 2018 reply Follow Share option d gives F = 1 and all other gives f = 0 ... Because in three input lines if you got even no. Of 1s then the output is 1 , which is only possible in option (d). For more info see my previous comments. What mistake you made is you are taking 2 lines xnoring it and with there result you are xnoring 3rd one which is wrong... 0 votes 0 votes sumit goyal 1 commented Jan 14, 2018 reply Follow Share @https://electronics.stackexchange.com/questions/285392/3-input-xnor-gate-operation check here same question person is also saying A,,B,C is right but others saying D not correct 0 votes 0 votes Ismail commented Jan 14, 2018 reply Follow Share Mind it truth table for xor and xnor for odd no. Of inputs is same 0 votes 0 votes Ismail commented Jan 14, 2018 reply Follow Share You are doing like fig 1 which is wrong (i was doing the same mistake) ... We have fig 2 and fig 2 truth table is not equal to fig 1 truth table ... 2 votes 2 votes Ismail commented Jan 14, 2018 i edited by Ismail Jan 14, 2018 reply Follow Share Yup.. please do tell if you got that concept why fig 1 and fig 2 are different ... and Please help @Arjun sir 0 votes 0 votes sumit goyal 1 commented Jan 14, 2018 reply Follow Share @Arjun sir please help 0 votes 0 votes Please log in or register to add a comment.