Digital Electronics - Digital System Projects Using HDL

Exercise :: Digital System Projects Using HDL - General Questions

26. 

In the frequency counter, what is the function of the Schmitt trigger circuit?

A. To reduce input noise
B. To condition the input signal
C. To convert non-square waveforms
D. To provide a usable signal to the display unit

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

27. 

List three basic blocks in the digital clock project.

A. MOD-60, MOD-12 counters
B. MOD-5, MOD-10, MOD-12 counters
C. MOD-60, MOD-10 counters
D. MOD-6, MOD-12, and MOD-10 counters

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

28. 

When designing an HDL digital system, which is the worst mistake one can make?

A. Concluding that a fundamental block works perfectly
B. Failing to provide proper documentation
C. Adding blocks of code prior to testing them
D. Overlooking a possible VARIABLE

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

29. 

In the keypad application, just after the 4 ms mark the simulation imitates the release of the key by changing the column value back to F hex, which causes the d output to go into its Hi-Z state. On the next rising clock edge, what happens to dav?

A. It goes HIGH.
B. It goes LOW.
C. It goes to Hi-Z.
D. It goes to 1111H.

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

30. 

For the frequency counter, which is not a control signal from the control and timing block?

A. Clear
B. Enable
C. Reset
D. Store

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

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