![]() ![]() This counter will increment (by toggling its output) once per clock cycle and will count from zero to one before overflowing (starting over at zero). In the simplest case, a one-bit counter consists of a single flip-flop. When implemented with discrete flip-flops, ripple counters are commonly implemented with JK flip-flops, with each flip-flop configured to toggle when clocked (i.e., J and K are both connected to logic high). Each flip-flop introduces a delay from clock edge to output toggle, thus causing the counter bits to change at different times and producing a ripple effect as the input clock propagates through the chain. The first flip-flop is clocked by rising edges all other flip-flops in the chain are clocked by falling clock edges.
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