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- Question
The rise time (tr) is the time it takes for a pulse to rise from its ________ point up to its ________ point. The fall time (tf) is the length of time it takes to fall from the ________ to the ________ point.
Options- A. 10%, 90%, 90%, 10%
- B. 90%, 10%, 10%, 90%
- C. 20%, 80%, 80%, 20%
- D. 10%, 70.7%, 70.7%, 10%
- Correct Answer
- 10%, 90%, 90%, 10%
- 1. Fan-out for a typical TTL gate is ________.
Options- A. 100
- B. 54
- C. 10
- D. 4 Discuss
- 2. 1510 = 11112 = F16 = 00010101 BCD
Options- A. True
- B. False Discuss
- 3. An asynchronous binary up counter, made from a series of leading edge-triggered flip-flops, can be changed to a down counter by ________.
Options- A. taking the output on the other side of the flip-flops (
instead of Q) - B. clocking of each succeeding flip-flop from the other side ( instead of Q)
- C. changing the flip-flops to trailing edge triggering
- D. all of the above Discuss
- 4. The 1's complement of 10011101 is ________.
Options- A. 01100010
- B. 10011110
- C. 01100001
- D. 01100011 Discuss
- 5. VHDL code is divided into three sections: library declaration, entity declaration, and architecture body.
Options- A. True
- B. False Discuss
- 6. If an input is activated by a signal transition, it is ________.
Options- A. hair-triggered
- B. line-triggered
- C. pulse-triggered
- D. edge-triggered Discuss
- 7. In the digital clock project, when it is 11:59:59, AND gate 1 detects that the tens of hours is 1 and the edge trigger clock moves the display to 12:00:00.
Options- A. True
- B. False Discuss
- 8. Manufacturers of computers utilize 3-bit codes to indicate operations or instructions.
Options- A. True
- B. False Discuss
- 9. When an open occurs on the input of a CMOS gate, the output will ________.
Options- A. go LOW, because there is no current in an open circuit
- B. react as if the open input were a HIGH
- C. go HIGH, since full voltage appears across an open
- D. be unpredictable; it may go HIGH or LOW Discuss
- 10. The inverter can be produced with how many NAND gates?
Options- A. 1
- B. 2
- C. 3
- D. 4 Discuss
More questions
Correct Answer: 10
Correct Answer: True
Correct Answer: all of the above
Correct Answer: 01100010
Correct Answer: True
Correct Answer: edge-triggered
Correct Answer: False
Correct Answer: False
Correct Answer: be unpredictable; it may go HIGH or LOW
Correct Answer: 1
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