Discussion
Home ‣ Electronics ‣ Sequential Logic Circuits Comments
- Question
What happens to the parallel output word in an asynchronous binary down counter whenever a clock pulse occurs?
Options- A. The output word decreases by 1.
- B. The output word decreases by 2.
- C. The output word increases by 1.
- D. The output word increases by 2.
- Correct Answer
- The output word decreases by 1.
- 1. A comparison between ring and johnson counters indicates that:
Options- A. a ring counter has fewer flip-flops but requires more decoding circuitry
- B. a ring counter has an inverted feedback path
- C. a johnson counter has more flip-flops but less decoding circuitry
- D. a johnson counter has an inverted feedback path Discuss
- 2. When the output of a tri-state shift register is disabled, the output level is placed in a:
Options- A. float state
- B. LOW state
- C. high impedance state
- D. float state and a high impedance state Discuss
- 3. Mod-6 and mod-12 counters are most commonly used in:
Options- A. frequency counters
- B. multiplexed displays
- C. digital clocks
- D. power consumption meters Discuss
- 4. In a BCD-to-seven-segment converter, why must a code converter be utilized?
Options- A. No conversion is necessary.
- B. to convert the 4-bit BCD into gray code
- C. to convert the 4-bit BCD into 10-bit code
- D. to convert the 4-bit BCD into 7-bit code Discuss
- 5. When two or more inputs are active simultaneously, the process is called:
Options- A. first-in, first-out processing
- B. priority encoding
- C. ripple blanking
- D. priority decoding Discuss
- 6. One of the major drawbacks to the use of asynchronous counters is that:
Options- A. low-frequency applications are limited because of internal propagation delays
- B. high-frequency applications are limited because of internal propagation delays
- C. Asynchronous counters do not have major drawbacks and are suitable for use in high- and low-frequency counting applications.
- D. Asynchronous counters do not have propagation delays, which limits their use in high-frequency applications. Discuss
- 7. What type of register would shift a complete binary number in one bit at a time and shift all the stored bits out one bit at a time?
Options- A. PIPO
- B. SISO
- C. SIPO
- D. PISO Discuss
- 8. To operate correctly, starting a ring counter requires:
Options- A. clearing all the flip-flops
- B. presetting one flip-flop and clearing all the others
- C. clearing one flip-flop and presetting all the others
- D. presetting all the flip-flops Discuss
- 9. A ripple counter's speed is limited by the propagation delay of:
Options- A. each flip-flop
- B. all flip-flops and gates
- C. the flip-flops only with gates
- D. only circuit gates Discuss
- 10. A sequence of equally spaced timing pulses may be easily generated by which type of counter circuit?
Options- A. shift register sequencer
- B. clock
- C. johnson
- D. binary Discuss
Sequential Logic Circuits problems
Search Results
Correct Answer: a johnson counter has an inverted feedback path
Correct Answer: float state and a high impedance state
Correct Answer: digital clocks
Correct Answer: to convert the 4-bit BCD into 7-bit code
Correct Answer: priority encoding
Correct Answer: high-frequency applications are limited because of internal propagation delays
Correct Answer: SISO
Correct Answer: presetting one flip-flop and clearing all the others
Correct Answer: each flip-flop
Correct Answer: shift register sequencer
Comments
There are no comments.More in Electronics:
Programming
Copyright ©CuriousTab. All rights reserved.