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Electronics
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Flip-Flops and Timers
Comments
Question
If an input is activated by a signal transition, it is _____________.
Options
A. edge-triggered
B. toggle-triggered
C. clock-triggered
D. noise-triggered
Correct Answer
edge-triggered
Flip-Flops and Timers problems
Search Results
1. An S-R NAND latch with both of its inputs LOW has an output that is _____________.
Options
A. unpredictable
B. floating
C. HIGH
D. LOW
Show Answer
Scratch Pad
Discuss
Correct Answer: unpredictable
2. A retriggerable one-shot has a pulse width of 10 ms; 3 ms after being triggered, another trigger pulse is applied. The resulting output pulse will be _________ ms.
Options
A. 3
B. 7
C. 10
D. 13
Show Answer
Scratch Pad
Discuss
Correct Answer: 13
3. The S-R, D-type, and J-K flip-flops are all examples of _________________.
Options
A. astable multivibrators
B. bistable multivibrators
C. monostable multivibrators
D. tristable multivibrators
Show Answer
Scratch Pad
Discuss
Correct Answer: bistable multivibrators
4. Edge-triggered flip-flops must have _________.
Options
A. very fast response times
B. at least two inputs to handle rising and falling edges
C. a positive-transition pulse generator
D. a negative-transition pulse generator
Show Answer
Scratch Pad
Discuss
Correct Answer: a positive-transition pulse generator
5. The J-K flip-flop eliminates the RACE state when both the J and K inputs are HIGH.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: True
6. The toggle condition in a master-slave J-K flip-flop means that Q and
will switch to their ________ state(s) at the _____________________.
Options
A. inverted, positive clock edge
B. quiescent, negative clock edge
C. opposite, active clock edge
D. reset, synchronous clock edge
Show Answer
Scratch Pad
Discuss
Correct Answer: opposite, active clock edge
7. An S-R flip-flop can be triggered by ______, ______, or ________.
Options
A. HIGHs, LOWs, PRESETs
B. edges, levels, pulses
C. HIGHs, LOWs, CLEARs
D. SETs, RESETs, HIGHs
Show Answer
Scratch Pad
Discuss
Correct Answer: edges, levels, pulses
8. Pulse-triggered flip-flops are also called _________ flip-flops.
Options
A. master-slave
B. postponed
C. level
D. edge
Show Answer
Scratch Pad
Discuss
Correct Answer: master-slave
9. One example of the use of an S-R flip-flop is as a(n) _________.
Options
A. racer
B. binary storage register
C. astable oscillator
D. transition pulse generator
Show Answer
Scratch Pad
Discuss
Correct Answer: binary storage register
10. For an S-R flip-flop to be SET or RESET, the respective input must be __________.
Options
A. LOW
B. HIGH
C. installed with steering diodes
D. in parallel with a limiting resistor
Show Answer
Scratch Pad
Discuss
Correct Answer: HIGH
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