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- Question
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
- Correct Answer
- current tracer, logic pulser
- 1. 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 Discuss
- 2. 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
- 3. 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
- 4. 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
- 5. 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
- 6. The control of digital circuits is usually achieved with _________.
Options- A. random pulses
- B. clock signals
- C. sophisticated gating
- D. selected frequencies Discuss
- 7. 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
- 8. "Train" and "single" is the mode selection for a _______.
Options- A. multimeter
- B. logic probe
- C. current tracer
- D. logic pulser Discuss
- 9. 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
- 10. In order for a logic probe to operate, its red and black leads must first be connected to a ________.
Options- A. logic clip
- B. HIGH or TRUE signal
- C. power source
- D. logic pulser Discuss
Testing and Troubleshooting problems
Search Results
Correct Answer: sink, source current
Correct Answer: cannot, together, if the outputs are in opposite states excessively high currents can damage one or both devices
Correct Answer: source 400 µA of current to no more than 10 attached gates
Correct Answer: fanout
Correct Answer: represent MOSFET devices utilizing either P-channel or N-channel devices exclusively within a given gate
Correct Answer: clock signals
Correct Answer: clock frequency changes
Correct Answer: logic pulser
Correct Answer: current tracer
Correct Answer: power source
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