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- Question
In VHDL, the architecture declaration always begins with the ________ of variable signals or components that will be used in the concurrent description between BEGIN and END.
Options- A. type
- B. vectors
- C. functions
- D. declarations
- Correct Answer
- declarations
- 1. The DAC0808 and the MC1408 are very popular and inexpensive 8-bit D/A converters.
Options- A. True
- B. False Discuss
- 2. What is the advantage of using CMOS logic over TTL?
Options- A. It switches faster.
- B. It uses less power.
- C. It is larger.
- D. cost Discuss
- 3. A logic signal experiences a delay in going through a circuit. The two propagation delay times are defined as:
Options- A. tPLH and tPHL.
- B. tDLH and tDHL.
- C. tHPL and tlph.
- D. tLDH and tHDL. Discuss
- 4. Serial communications cannot be sped up.
Options- A. True
- B. False Discuss
- 5. If all inputs to a TTL NAND gate are low, what is the ON, OFF condition of each transistor in the circuit?
Options- A. Q1-ON, Q2-OFF, Q3-ON, Q4-OFF
- B. Q1-ON, Q2-ON, Q3-OFF, Q4-OFF
- C. Q1-OFF, Q2-OFF, Q3-ON, Q4-ON
- D. Q1-OFF, Q2-ON, Q3-OFF, Q4-ON Discuss
- 6. When the output of a standard TTL gate is HIGH, it can ________.
Options- A. sink 16 mA of current from the attached input gates
- B. source 400 µA of current to no more than 10 attached gates
- C. source 16 mA of current to no more than 10 attached gates
- D. sink a maximum of 400 µA from no more than 10 load gates Discuss
- 7. The equation ________ cannot be further simplified.
Options- A.
- B.
- C.
- D.
Discuss
- 8. Assume that a particular IC has a supply voltage (Vcc) equal to +5 V and ICCH = 10 mA and ICCL = 23 mA. What is the power dissipation for the chip?
Options- A. 50 mW
- B. 82.5 mW
- C. 115 mW
- D. 165 mW Discuss
- 9. LDA addr and STA addr are Fortran language instructions stored in an external memory IC for a microprocessor.
Options- A. True
- B. False Discuss
- 10. A(n) ________ is a section of embedded logic that is commonly found in FPGAs.
Options- A. LUT
- B. core
- C. DSP
- D. PI Discuss
More questions
Correct Answer: True
Correct Answer: It uses less power.
Correct Answer: tPLH and tPHL.
Correct Answer: False
Correct Answer: Q1-ON, Q2-OFF, Q3-ON, Q4-OFF
Correct Answer: source 400 µA of current to no more than 10 attached gates
Correct Answer:
Correct Answer: 82.5 mW
Correct Answer: False
Correct Answer: core
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