True or false 1) In asynchronous counters made of JK flip-flops, the main clock

ID: 2990827 • Letter: T

Question

True or false

1) In asynchronous counters made of JK flip-flops, the main clock signal is fed into the CLK input of
the most significant flip-flop.

2) The propagation delay in individual stages of an asynchronous counter is cumulative

3) The Q output from a JK flip-flop toggles on each clock input cycle as long as J = K = 1.

4) Generally speaking, a synchronous counter requires more circuitry than a comparable
asynchronous counter.

5) A counter that counts from 0000 to 1111 is called a MOD-16 counter.

6) A MOD-4 counter with an input clock frequency of 1500 Hz has an output frequency of 375 Hz.

7) A MOD-10 counter is also referred to as a decade counter.

8) MOD number = 2^n, where n = number of flip-flops.

9) A MOD-10 counter resets at 1010, thereby never actually reaching 10.

10) One potential problem with asynchronous counters is that the overall propagation delay increases with each added flip-flop.

11) Synchronous counters require less circuitry than asynchronous counters.

12) The MOD number of a Johnson counter always equals one-half the number of flip-flops in the counter.

13) All flip-flops change states at the same time in an asynchronous counter.

14) A MOD-5 counter would count to a maximum of 101 and then clear to recycle.

15) Typically, four flip-flops are required for a MOD-60 counter.

1.True

2.true

3.True

4.True

5.True

6.True

7.True

8.True

9.True

10.True

11.False

12.False

13.False

14.False

15.False

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