JK flip-flop
<hardware> An edge triggered {SR flip-flop} with extra logic such that only one of the R and S inputs is enabled at any time.
This prevents a race condition which can occur when both inputs of an RS flip-flop are active at the same time. In a JK flip-flop the R and S inputs are renamed J and K.
The set input (J) is only enabled when the flip-flop is reset and K when it is set.
If both J and K inputs are held active then the outputs will change ("togle") on each falling edge of the clock.
JK flip-flops can be used to build a binary counter with a reset input.
(http://www.play-hookey.com/digital/logic7.html)}.
[Was it named (after JackKilby}?]
