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Sequential Logic Circuits
Comments
Question
In order to use a shift register as a counter, ________.
Options
A. the register's serial input is the counter input and the serial output is the counter output
B. the parallel inputs provide the input signal and the output signal is taken from the serial data output
C. a serial-in, serial-out register must be used
D. the serial output of the register is connected back to the serial input of the register
Correct Answer
the serial output of the register is connected back to the serial input of the register
Sequential Logic Circuits problems
Search Results
1. To operate correctly, starting a ring counter requires __________.
Options
A. clearing one flip-flop and presetting all the others
B. clearing all the flip-flops
C. presetting one flip-flop and clearing all the others
D. presetting all the flip-flops
Show Answer
Scratch Pad
Discuss
Correct Answer: presetting one flip-flop and clearing all the others
2. A _________ shift register can shift stored data either left or right.
Options
A. bidirectional
B. tri-state
C. universal
D. bidirectional universal
Show Answer
Scratch Pad
Discuss
Correct Answer: bidirectional universal
3. Asynchronous counters are often called ________ counters.
Options
A. toggle
B. ripple
C. binary
D. flip-flop
Show Answer
Scratch Pad
Discuss
Correct Answer: ripple
4. An asynchronous counter differs from a synchronous counter in the method of clocking.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: True
5. A ripple counter is an asynchronous counter.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: True
6. Synchronous construction reduces the delay time of a counter to the delay of __________.
Options
A. all flip-flops and gates
B. a single flip-flop and a gate
C. all flip-flops and gates after a 3 count
D. a single gate
Show Answer
Scratch Pad
Discuss
Correct Answer: a single flip-flop and a gate
7. Ring and johnson counters are _______.
Options
A. asynchronous counters
B. synchronous counters
C. true binary counters
D. asynchronous and true binary counters
Show Answer
Scratch Pad
Discuss
Correct Answer: synchronous counters
8. A sequence of equally spaced timing pulses may be easily generated by a(n) __________.
Options
A. ring counter
B. johnson counter
C. binary up counter
D. ripple counter
Show Answer
Scratch Pad
Discuss
Correct Answer: ring counter
9. When two counters are cascaded, the overall mod number is equal to the __________ of their individual mod numbers.
Options
A. product
B. sum
C. log
D. reciprocal
Show Answer
Scratch Pad
Discuss
Correct Answer: product
10. The mod-10 counter is also referred to as a ________ counter.
Options
A. decade
B. strobing
C. ring
D. BCD
Show Answer
Scratch Pad
Discuss
Correct Answer: decade
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