Digital Electronics - Flip-Flops - Discussion
Discussion Forum : Flip-Flops - General Questions (Q.No. 17)
17.
How can the cross-coupled NAND flip-flop be made to have active-HIGH S-R inputs?
Discussion:
8 comments Page 1 of 1.
GalvezChristi said:
5 years ago
In a normal nand latch, Giving a low input sets you to the SET state this is what we called active low because we are using LOW signal to be in the set state. To have an active high we need to invert the inputs so that giving a high signal will give us a set state.
(1)
Raajee said:
1 decade ago
It's enabled for positive click.
Ritu gupta said:
1 decade ago
Active HIGH S-R inputs means?
Neeru said:
1 decade ago
When we use nand cross coupling in SR flip flop , the whole outputs are inverted . Therefore , S=1, R=1 gives Q=0 , Q'=0 . And hence high inputs are accepted .
(1)
GURPREET KAUR said:
1 decade ago
It means when S R is 1 1 then complemented S R will give 0 0 and hence we get the O/P same as the previous O/P i.e. no CHANGE.
Darnasinarendra said:
1 decade ago
I couldn't understand the meaning of the question correctly?
Raju said:
1 decade ago
It is meant that., when we invert the S-R inputs it gives the complemented SR latch using NAND gates.
Rudhin said:
1 decade ago
Is it meant that when we give a zero input to S (by following the option C) Q will become 1(active high) ?
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