Sequential Circuits

Which of the listed flip-flops is also known as a programmable flip-flop?

• Clocked SR flip-flop

• T-type flip-flop

• JK flip-flop

• D-type flip-flop

Which of the following is a major advantage of the D-type flip-flop over the clocked SR type?

• A shorter propagation delay

• Only one input and one output

• No indeterminate output state

• Negative edge triggering

Which of the following is a major advantage of synchronous counters over asynchronous counters?

• They use JK flip-flops

• They do not suffer from ripple through problems

• They are cheaper to implement than asynchronous counters

• The flip-flops operate consecutively when a clock pulse is received

In a simple low activated SR flip-flop, the Q and NOT Q will be indeterminate (unknown) if:

• Both S and R are at logic 0 together

• Both S and R change from logic 0 to logic 1 together

• R changes to logic 0 while S is at logic 1

• S changes to logic 0 while R is at logic 1

What type of register would shift a complete binary number in one bit at a time and shift all the stored bits out one bit at a time?

• PIPO

• SIPO

• PISO

• SISO