Digital Electronics - Counters

Exercise :: Counters - General Questions

55. 

Which of the following statements best describes the operation of a synchronous up-/down-counter?

A. The counter can count in either direction, but must continue in that direction once started.
B. The counter can be reversed, but must be reset before counting in the other direction.
C. In general, the counter can be reversed at any point in its counting sequence.
D. The count sequence cannot be reversed, once it has begun, without first resetting the counter to zero.

Answer: Option C

Explanation:

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56. 

The parallel outputs of a counter circuit represent the:

A. parallel data word
B. clock frequency
C. counter modulus
D. clock count

Answer: Option D

Explanation:

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57. 

Any divide-by-N counter can be formed by using external gating to ________ at a predetermined number.

A. HIGH
B. reset
C. LOW
D. preset

Answer: Option B

Explanation:

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58. 

A MOD-16 synchronous counter has inputs labeled . These inputs would most probably be used to:

A. reset the counter to 0000 at the end of each count cycle
B. preset the counter to a value determined by the inputs any time the is active-HIGH
C. preset the counter to a value determined by the inputs any time the is active-LOW
D. reset the counter to 0000 any time is active-HIGH and is active-LOW

Answer: Option D

Explanation:

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59. 

How many natural states will there be in a 4-bit ripple counter?

A. 4
B. 8
C. 16
D. 32

Answer: Option C

Explanation:

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60. 

List which pins need to be connected together on a 7492 to make a MOD-12 counter.

A. 1 to 12, 11 to 6, 9 to 7
B. 1 to 12, 12 to 6, 11 to 7
C. 1 to 12, 9 to 6, 8 to 7
D. 1 to 12

Answer: Option D

Explanation:

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