For example, a close inspection of the timing diagram as the counter moves from state 7 to state 8, the shaded area in Figure 7.11, shows that it is in state 6, state 4, and then state 0 before flip flop D goes to 1 and it reaches state 8. These short periods are not important if the outputs are used to light a display or as the inputs to a clocked flip flop, but they could produce spikes that would trigger a flip flop if used as a clock or Count input.
For example, a close inspection of the timing diagram as the counter moves from state 7 to state 8, the shaded area in Figure 7.11, shows that it is in state 6, state 4, and then state 0 before flip flop D goes to 1 and it reaches state 8. These short periods are not important if the outputs are used to light a display or as the inputs to a clocked flip flop, but they could produce spikes that would trigger a flip flop if used as a clock or Count input.
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