Shift registers are used to store and transfer data.

More Questions from Counters

• A J-K flip-flop excitation table lists the present state, the next state, and the J and K levels required to produce each transition.
• Counters are generally decoded in order to determine their count state.
• Phototransistors have varying resistance from collector to emitter, depending on how much light strikes them.
• An asynchronous counter differs from a synchronous counter in the method of clocking.
• When a J-K flip-flop is used in a circuit, we only have to consider the level at J and K at the active clock edge to know the states of the outputs.
• The MOD number of a Johnson counter will always be equal to one-half the number of flip-flops in the counter.
• In a synchronous counter, each state is clocked by the same pulse.
• To design a divide-by-200 counter using synchronous counters, two 4-bit counters could be cascaded together to form an 8-bit counter.
• Another term used to describe up/down counters is bidirectional.
• A state diagram is a table of states.

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