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- Question
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
- Correct Answer
- to convert the 4-bit BCD into 7-bit code
- 1. 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
- 2. How many inputs are required for a 1-of-10 BCD decoder?
Options- A. 4
- B. 8
- C. 10
- D. 1 Discuss
- 3. A circuit that responds to a specific set of signals to produce a related digital signal output is called a(n):
Options- A. BCD matrix
- B. display driver
- C. encoder
- D. decoder Discuss
- 4. Which type of decoder will select one of sixteen outputs, depending on the 4-bit binary input value?
Options- A. hexadecimal
- B. dual octal outputs
- C. binary-to-hexadecimal
- D. hexadecimal-to-binary Discuss
- 5. Most demultiplexers facilitate which of the following?
Options- A. decimal to hexadecimal
- B. single input, multiple outputs
- C. ac to dc
- D. odd parity to even parity Discuss
- 6. 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
- 7. 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
- 8. 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
- 9. 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. Discuss
- 10. 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
Combinational Logic Circuits problems
Search Results
Correct Answer: priority encoding
Correct Answer: 4
Correct Answer: encoder
Correct Answer: hexadecimal
Correct Answer: single input, multiple outputs
Correct Answer: digital clocks
Correct Answer: float state and a high impedance state
Correct Answer: a johnson counter has an inverted feedback path
Correct Answer: The output word decreases by 1.
Correct Answer: high-frequency applications are limited because of internal propagation delays
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