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This flip-flop toggles
(Q changes state) on the
negative going edge of
the clock pulse.
T acts as an ENABLE /
INHIBIT control.
Q will only toggle on
the negative edge of the
clock pulse, when T is
high.
Below is shown a D type
flip-flop connected as a
toggle type.
On each clock pulse
positive going edge, Q
will go to the state bar
Q was before the clock
pulse arrived.
Remember that bar Q is
the opposite level to Q.
Therefore Q will toggle.
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