2 input MUX


hi, For an AND-OR implementation of a two input MUX,how do you test for Stuck-At-0 and Stuck-At-1 faults at the internal nodes? thanks.

Asked By: logic_gate
On: Jan 26, 2005 3:49:19 AM

Comments(3)



give a to i/p of 1 trans gate and !b to control of nmos and b to pmos. give !a to i/p of 2nd trans gate and !b to control of pmos and b to nmos. join the two.to get xor to convert that to xnor just connect !a to 1 and a to 2.
1.No vsb cannot be -ve since if -ve bs will form a diode like one and will conduct.For that substrate(body)is usually connected to most -ve voltage among the chip
hi , go to the fault site and see that the input pattern given gives an output that is opposite to the stuck-at-fault value(i.e for stuck-at-1 at output of and gate the output should be 0 ).
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