logo

CuriousTab

CuriousTab

Discussion


Home Electronics Standard Logic Devices (SLD) Comments

  • Question
  • An open collector output can ________ current, but it cannot ___________________.


  • Options
  • A. sink, source current
  • B. source, sink current
  • C. sink, source voltage
  • D. source, sink voltage

  • Correct Answer
  • sink, source current 


  • Standard Logic Devices (SLD) problems


    Search Results


    • 1. Totem pole outputs _________ be connected __________ because ____________.

    • Options
    • A. can, in parallel, sometimes higher current is required
    • B. cannot, together, if the outputs are in opposite states excessively high currents can damage one or both devices
    • C. should, in series, certain applications may require higher output voltage
    • D. can, together, together they can handle larger load currents and higher output voltages
    • Discuss
    • 2. 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
    • 3. The number of inputs that a gate output can drive without possible logic errors is the _______.

    • Options
    • A. propagation delay
    • B. noise margin
    • C. speed-power product
    • D. fanout
    • Discuss
    • 4. PMOS and NMOS ____________________________.

    • Options
    • A. represent MOSFET devices utilizing either P-channel or N-channel devices exclusively within a given gate
    • B. are enhancement type CMOS devices used to produce a series of high-speed logic known as 74HC
    • C. represent positive and negative MOS type devices that can be operated from differential power supplies and are compatible with operational amplifiers
    • D. none of the above
    • Discuss
    • 5. An undefined state, neither high nor low, is called _________.

    • Options
    • A. don't care
    • B. floating
    • C. minimum state
    • D. noise
    • Discuss
    • 6. The ideal test equipment to use for locating shorts in digital circuitry is the ________ and _______.

    • Options
    • A. logic probe, clip
    • B. logic pulser, logic probe
    • C. current tracer, logic pulser
    • D. current tracer, logic clip
    • Discuss
    • 7. The control of digital circuits is usually achieved with _________.

    • Options
    • A. random pulses
    • B. clock signals
    • C. sophisticated gating
    • D. selected frequencies
    • Discuss
    • 8. Erratic or unexplained digital circuit activity is often due to _________.

    • Options
    • A. a glitch
    • B. a random pulse
    • C. clock frequency changes
    • D. a change in slew rate
    • Discuss
    • 9. "Train" and "single" is the mode selection for a _______.

    • Options
    • A. multimeter
    • B. logic probe
    • C. current tracer
    • D. logic pulser
    • Discuss
    • 10. The device that would best aid in open track detection is a(n) ________.

    • Options
    • A. multimeter
    • B. current tracer
    • C. logic probe
    • D. oscilloscope
    • Discuss


    Comments

    There are no comments.

Enter a new Comment