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Home ‣ Digital Electronics ‣ Boolean Algebra and Logic Simplification See What Others Are Saying!
  • Question

  • The NAND or NOR gates are referred to as "universal" gates because either:


  • Options
  • A. can be found in almost all digital circuits
  • B. can be used to build all the other types of gates
  • C. are used in all countries of the world
  • D. were the first gates to be integrated

  • Correct Answer
  • can be used to build all the other types of gates 

    • More questions

    • 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

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