SEQUENTIAL PROJECT #4B – D LATCH D LATCH In
the standard SR latch, the only way to remember its current state (latch) was
to input 00. But with the Gated SR
latch, we can control the circuit to remember its state by setting E to
0. So there is no longer a need to have the
ability to have S and R both as 0 in order to latch since we have E. This
means that we only have two possible states for R and S left since we don’t
use R=1 and S=1. Those two states are
R=0 and S=1 (Setting state) and R=1 and S=0 (Resetting state). Seeing
that those two states are opposites, we can replace the two inputs by a
single input called D that will be split to the two old R and S locations but
will be inverted for one of them. And
this also conveniently removes the unwanted case from the SR latch when S=1
and R=1. D LATCH FROM SR LATCH
BLOCK DIAGRAM D LATCH BLOCK DIAGRAM REVIEW (D LATCH)
PROJECT EXPECTATIONS You will
create a D Latch. You are encouraged
to start by created the gated SR Latch and then adding the NOT gate at the
front of it. Show Mr.
Campeau your completed D Latch. |