Discussion
Home ‣ Digital Electronics ‣ Interfacing to the Analog World See What Others Are Saying!
- Question
A D/A converter changes things such as temperature variations into digital quantities.
Options- A. True
- B. False
- Correct Answer
- False
- 1. Which of the following is not a basic element within the microprocessor?
Options- A. Microcontroller
- B. Arithmetic logic unit (ALU)
- C. Register array
- D. Control unit Discuss
- 2. In an even-parity system, the parity bit is adjusted to make an even number of one bits.
Options- A. True
- B. False Discuss
- 3. One multiplexer can take the place of:
Options- A. several SSI logic gates
- B. combinational logic circuits
- C. several Ex-NOR gates
- D. several SSI logic gates or combinational logic circuits Discuss
- 4. The main advantage of the tracking A/D converter over the stairstep-ramp A/D converter is that ________.
Options- A. it does not require a counter
- B. it uses an up/down counter to indicate the polarity of the input voltage
- C. it uses an up/down counter to measure both positive and negative voltages
- D. it is faster Discuss
- 5. The asynchronous inputs are normally labeled ________ and ________, and are normally active-________ inputs.
Options- A. PRE, CLR, LOW
- B. ON, OFF, HIGH
- C. START, STOP, LOW
- D. SET, RESET, HIGH Discuss
- 6. What does a dot mean when placed on a PLD circuit diagram?
Options- A. A point that is programmable
- B. A point that cannot change
- C. An intersection of logic blocks
- D. An input or output point Discuss
- 7. Convert the following BCD number to decimal.
100000000011bcd
Options- A. 8003
- B. 803
- C. 1003
- D. 103 Discuss
- 8. The circuit given below fails to function; the inputs are checked with a logic probe and the following indications are obtained: CLK, J1, J2, J3, K1, K2, and K3 are pulsing. Q and
are HIGH. 
and PRE are LOW. What could be causing the problem? 
Options- A. There is no problem.
- B. The clock should be held HIGH.
- C. The PRE is stuck LOW.
- D. The CLR is stuck HIGH. Discuss
- 9. The internal circuitry of the 555 timer consists of ________, an R-S flip-flop, a transistor switch, an output buffer amplifier, and a voltage divider.
Options- A. a comparator
- B. a voltage amplifier
- C. two comparators
- D. a peak detector Discuss
- 10. What is the difference between the 8031 and the 8051?
Options- A. The 8031 has no interrupts.
- B. The 8031 is ROM-less.
- C. The 8051 is ROM-less.
- D. The 8051 has 64 bytes more memory. Discuss
More questions
Correct Answer: Microcontroller
Correct Answer: True
Correct Answer: several SSI logic gates or combinational logic circuits
Correct Answer: it is faster
Correct Answer: PRE, CLR, LOW
Correct Answer: A point that cannot change
Correct Answer: 803
Correct Answer: The PRE is stuck LOW.
Correct Answer: two comparators
Correct Answer: The 8031 is ROM-less.
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