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MCQs

Total Questions : 44 | Page 3 of 5 pages
Question 21.  An open-drain gate is the CMOS counterpart of ________.
  1.    an open-collector TTL gate
  2.    a tristate TTL gate
  3.    a bipolar junction transistor
  4.    an emitter-coupled logic gate
 Discuss Question
Answer: Option A. -> an open-collector TTL gate
Question 22.  For a CMOS gate, which is the best speed-power product?
  1.    1.4 pJ
  2.    1.6 pJ
  3.    2.4 pJ
  4.    3.3 pJ
 Discuss Question
Answer: Option A. -> 1.4 pJ
Question 23. . An open-collector output requires ________.
  1.    a pull-down resistor
  2.    a pull-up resistor
  3.    no output resistor
  4.    an output resistor
 Discuss Question
Answer: Option B. -> a pull-up resistor
Question 24. . The active switching element used in all TTL circuits is the ________.
  1.    bipolar junction transistor (BJT)
  2.    field-effect transistor (FET)
  3.    metal-oxide semiconductor field-effect transistor (MOSFET)
  4.    unijunction transistor (UJ)
 Discuss Question
Answer: Option A. -> bipolar junction transistor (BJT)
Question 25.  The nominal value of the dc supply voltage for TTL and CMOS is ________.
  1.    +3 V
  2.    +5 V
  3.    +9 V
  4.    +12 V
 Discuss Question
Answer: Option B. -> +5 V
Question 26.  Which logic family combines the advantages of CMOS and TTL?
  1.    BiCMOS
  2.    TTL/CMOS
  3.    ECL
  4.    TTL/MOS
 Discuss Question
Answer: Option A. -> BiCMOS
Question 27. . Most TTL logic used today is some form of ________.
  1.    Schottky TTL
  2.    tristate TTL
  3.    low-power TTL
  4.    open-collector TTL
 Discuss Question
Answer: Option A. -> Schottky TTL
Question 28. . Which equation is correct?
  1.    VNL = VIL(max) + VOL(max)
  2.    VNH = VOH(min) + VIH(min)
  3.    VNL = VOH(min) – VIH(min)
  4.    VNH = VOH(min) – VIH(min)
 Discuss Question
Answer: Option D. -> VNH = VOH(min) – VIH(min)
Question 29. . A standard TTL circuit with a totem-pole output can sink, in the LOW state (IOL(max)), ________.
  1.    16 mA
  2.    20 mA
  3.    16 A
  4.    20 A
 Discuss Question
Answer: Option A. -> 16 mA
Question 30. . One output structure of a TTL gate is often referred to as a ________.
  1.    totem-pole arrangement
  2.    diode arrangement
  3.    JBT arrangement
  4.    base, emitter, collector arrangement
 Discuss Question
Answer: Option A. -> totem-pole arrangement

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