A T$-$FF and a D$-$FF are edge$-$triggered devices as well as

an edge$-$triggered JK$-$FF$.$

$($a$)$ Construct a T$-$FF by using an edge$-$triggered JK$-$FF$.$

$($b$)$ Construct a D$-$FF by using an edge$-$triggered JK$-$FF

and some combinational logic.

$($c$)$ Construct an edge$-$triggered JK$-$FF by using a D$-$FF

and some combinational logic.

$\backslash$table$[[$CLK$,$Q$^(+),\backslash$bar $($Q$)^(+)],[0,$Q$,\backslash$bar $($Q$)],[1,$Q$,\backslash$bar $($Q$)],[-,$Q$,\backslash$bar $($Q$)],[,\backslash$bar $($Q$),$Q$]]$

T$-$FF

T$-$FF

D$-$FF

Edge$-$triggered JK$-$FF