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A rectangle with J, K and clock inputs.
Also known as: JK bistable, J-K flip-flop, Rectangle with J and K
The JK flip-flop removes the forbidden state of the SR latch: where SR had an undefined output when both inputs were asserted, JK toggles instead. That single change is the reason it displaced SR as the general-purpose flip-flop.
Denotes a flip-flop with set, reset and toggle behaviour selected by its two data inputs.
Contexts: Electrical equipment
Toggles when both inputs are asserted, replacing the undefined state that the SR latch has in that condition.
Contexts: Electrical equipment
Takes its letters from no agreed source; the commonest account attributes them to Jack Kilby, which is documented as an attribution rather than established.
Contexts: Electrical equipment
An upright rectangle with the letters J and K and a small triangle marked on its left side and the letter Q on its right.