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- Question
What must be done in the given figure in order to use two 7485 4-bit comparators to compare two 8-bit numbers?
Options- A. The P < Q, P = Q, and P > Q outputs of COMP A must be connected to the same outputs of COMP B.
- B. The P < Q, P = Q, and P > Q outputs of COMP A must be connected to the <, =, and > inputs of COMP B.
- C. The = input of COMP A must be connected to Vcc, and the < and > inputs must be connected to ground.
- D. The P < Q, P = Q, and P > Q outputs of COMP A must be connected to the <, =, and > inputs of COMP B, the = input of COMP A must be connected to Vcc, and the < and > inputs must be connected to ground.
- Correct Answer
- The P < Q, P = Q, and P > Q outputs of COMP A must be connected to the <, =, and > inputs of COMP B, the = input of COMP A must be connected to Vcc, and the < and > inputs must be connected to ground.
- 1. A push-button switch is used to input data to a register. The output of the register is erratic. What could be causing the problem?
Options- A. The power supply is probably noisy.
- B. The switch contacts are bouncing.
- C. The socket contacts on the register IC are corroded.
- D. The register IC is intermittent and failure is imminent. Discuss
- 2. The power dissipation of a CMOS IC will ________.
Options- A. decrease with frequency
- B. increase with gate size
- C. decrease with gate size
- D. increase with frequency Discuss
- 3. Which of the following is not a weighted value positional numbering system:
Options- A. hexadecimal
- B. binary-coded decimal
- C. binary
- D. octal Discuss
- 4. ________ ADCs have a fixed value of conversion time that is not dependent on the value of the analog input.
Options- A. Substandard
- B. Dual
- C. Recessive-approximation
- D. Successive-approximation Discuss
- 5. A correct output is achieved from a master-slave J-K flip-flop only if its inputs are stable while the:
Options- A. clock is LOW
- B. slave is transferring
- C. flip-flop is reset
- D. clock is HIGH Discuss
- 6. In VHDL, macrofunctions is/are:
Options- A. digital circuits.
- B. analog circuits.
- C. a set of bit vectors.
- D. preprogrammed TTL devices. Discuss
- 7. A J-K flip-flop is in a "no change" condition when ________.
Options- A. J = 1, K = 1
- B. J = 1, K = 0
- C. J = 0, K = 1
- D. J = 0, K = 0 Discuss
- 8. PMOS and NMOS circuits are used largely in ________.
Options- A. MSI functions
- B. LSI functions
- C. diode functions
- D. TTL functions Discuss
- 9. ________ counters are often used whenever pulses are to be counted and the results displayed in decimal.
Options- A. Synchronous
- B. Bean
- C. Decade
- D. BCD Discuss
- 10. Assume that in a certain 4-bit weighted ladder DAC, the input representing the most significant bit is applied to a 20 kΩ resistor. What is the size of the resistor that represents the least significant bit?
Options- A. 2.5 kΩ
- B. 5 kΩ
- C. 80 kΩ
- D. 160 kΩ Discuss
More questions
Correct Answer: The switch contacts are bouncing.
Correct Answer: increase with frequency
Correct Answer: binary-coded decimal
Correct Answer: Successive-approximation
Correct Answer: clock is HIGH
Correct Answer: preprogrammed TTL devices.
Correct Answer: J = 0, K = 0
Correct Answer: LSI functions
Correct Answer: BCD
Correct Answer: 160 kΩ
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