Reference no: EM13249151

1.A three-bit Johnson counter is clocked with pulses at a 120 MHz rate. What will be the pulse frequency of the output of the last flip-flop in the chain?
A. 120 MHz
B. 20 MHz
C. 40 MHz
D. 60 MHz

2.The input to a full adder is high for the carry-in bit and low for the binary numbers being added. You would write __________ as the Boolean equation for this input.

3.To indicate the output of a decade counter as a decimal number,
A. nothing is needed as decade counters output decimal values.
B. a ten-indicator decoder matrix is required.
C. a ten-flip-flop full adder is needed.
D. an output converter is needed.

4.How many states occur in an asynchronous counter with seven flip-flops?
A.9
B.14
C.64
D. 128

5.Ten pulses are applied to a four-bit asynchronous counter. If the counter state was 0000 before the pulses were applied, how many times did the last flip-flop in the chain change states?
A. 1
B.2
C.3
D.4

6.A counting circuit contains five flip-flops. Clock pulses are applied to all five at the same time. This is an
example of a
A. serial up counter.
B. serial down counter.
C. parallel down counter.
D. shift register.

7. In a mod-16 counter, each flip-flop has a propagation delay time of 10 ns (nanoseconds). The total delay
time will be
A. 10 ns.
B. 20 ns.
C. 30 ns.
D. 40 ns.