multivibrators-and-555-timer digital-electronics question and answers -Page 5

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Multivibrators and 555 Timer problems

1. When extremely critical timing is required, a quartz crystal can be used.
Options
A. True
B. False

Correct Answer: True

2. A comparator simply outputs a HIGH or LOW based on a comparison of the voltage levels at its input.
Options
A. True
B. False

Correct Answer: True

3. When the 74123, a retriggerable monostable multivibrator device, ends its timing cycle it must be started all over again.
Options
A. True
B. False

Correct Answer: False

4. Timing accuracy of more than eight significant digits can be easily achieved by using quartz crystals.
Options
A. True
B. False

Correct Answer: False

5. The 74S124 TTL chip is a voltage-controlled oscillator that will generate a specific frequency at V_out.
Options
A. True
B. False

Correct Answer: False

6. A multivibrator is a circuit that changes between two digital levels on a continuous, free-running basis or on demand.
Options
A. True
B. False

Correct Answer: True

7. A monostable multivibrator is commonly called a two shot.
Options
A. True
B. False

Correct Answer: False

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