One of the major drawbacks to the use of asynchronous counters is: low-frequency

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Question
One of the major drawbacks to the use of asynchronous counters is:
Options
A. low-frequency applications are limited because of internal propagation delays
B. high-frequency applications are limited because of internal propagation delays
C. asynchronous counters do not have major drawbacks and are suitable for use in high- and low-frequency counting applications
D. asynchronous counters do not have propagation delays and this limits their use in high-frequency applications

Correct Answer

high-frequency applications are limited because of internal propagation delays

Counters problems

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1. For a one-shot application, how can HDL code be used to make a circuit respond once to each positive transition on its trigger input?
Options
A. By using a counter
B. By using an active clock
C. By using an immediate reload
D. By using edge trapping

7. A 4-bit ripple counter consists of flip-flops, which each have a propagation delay from clock to Q output of 15 ns. For the counter to recycle from 1111 to 0000, it takes a total of ________.
Options
A. 15 ns
B. 30 ns
C. 45 ns
D. 60 ns

10. The circuit given below fails to produce data output. The individual flip-flops are checked with a logic probe and pulser, and each checks OK. What could be causing the problem?
Options
A. The data output line may be grounded.
B. One of the clock input lines may be open.
C. One of the interconnect lines between two stages may have a solder bridge to ground.
D. One of the flip-flops may have a solder bridge between its input and V_cc.

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