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Counters
Comments
Question
Synchronous (parallel) counters eliminate the delay problems encountered with asynchronous (ripple) counters because the:
Options
A. input clock pulses are applied only to the first and last stages.
B. input clock pulses are applied only to the last stage.
C. input clock pulses are applied simultaneously to each stage.
D. input clock pulses are not used to activate any of the counter stages.
Correct Answer
input clock pulses are applied simultaneously to each stage.
Counters problems
Search Results
1. A principle regarding most display decoders is that when the correct input is present, the related output will switch:
Options
A. HIGH
B. to high impedance
C. to an open
D. LOW
Show Answer
Scratch Pad
Discuss
Correct Answer: LOW
2. A MOD-16 ripple counter is holding the count 1001
2
. What will the count be after 31 clock pulses?
Options
A. 1000
2
B. 1010
2
C. 1011
2
D. 1101
2
Show Answer
Scratch Pad
Discuss
Correct Answer: 1000
2
3. Once an up-/down-counter begins its count sequence, it cannot be reversed.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: False
4. MOD-6 and MOD-12 counters and multiples are most commonly used as:
Options
A. frequency counters
B. multiplexed displays
C. digital clocks
D. power consumption meters
Show Answer
Scratch Pad
Discuss
Correct Answer: digital clocks
5. How many different states does a 3-bit asynchronous counter have?
Options
A. 2
B. 4
C. 8
D. 16
Show Answer
Scratch Pad
Discuss
Correct Answer: 8
6. What function will the counter shown below be performing during period "B" on the timing diagram?
Options
A. Counting up
B. Counting down
C. Inhibited
D. Loading
Show Answer
Scratch Pad
Discuss
Correct Answer: Counting up
7. Any divide-by-
N
counter can be formed by using external gating to ________ at a predetermined number.
Options
A. HIGH
B. reset
C. LOW
D. preset
Show Answer
Scratch Pad
Discuss
Correct Answer: reset
8. The terminal count of a modulus-11 binary counter is ________.
Options
A. 1010
B. 1000
C. 1001
D. 1100
Show Answer
Scratch Pad
Discuss
Correct Answer: 1010
9. Which of the following is an example of a counter with a truncated modulus?
Options
A. 8
B. 13
C. 16
D. 32
Show Answer
Scratch Pad
Discuss
Correct Answer: 13
10. Which of the following procedures could be used to check the parallel loading feature of a counter?
Options
A. Preset the
LOAD
inputs, set the
CLR
to its active level, and check to see that the
Q
outputs match the values preset into the
LOAD
inputs.
B. Apply LOWs to the parallel
DATA
inputs, pulse the
CLK
input, and check for LOWs on all the
Q
outputs.
C. Apply HIGHs to all the DATA inputs, pulse the
CLK
and
CLR
inputs, and check to be sure that the
Q
outputs are all LOW.
D. Apply HIGHs to all the
Q
terminals, pulse the
CLK
, and check to see if the
DATA
terminals now match the
Q
outputs.
Show Answer
Scratch Pad
Discuss
Correct Answer: Apply LOWs to the parallel
DATA
inputs, pulse the
CLK
input, and check for LOWs on all the
Q
outputs.
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