Many parallel counters use ________ presetting whereby the counter is preset on

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Question
Many parallel counters use ________ presetting whereby the counter is preset on the active transition of the same clock signal that is used for counting.
Options
A. feedback
B. synchronous
C. ripple
D. asynchronous

Correct Answer

synchronous

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2. One method of troubleshooting involves ________ the circuit under test with a ________ or ________ and then observing the output to check for proper bit patterns.
Options
A. checking, voltmeter, ohmmeter
B. exercising, stimulus, test pattern
C. testing, scope, logic analyzer
D. smashing, hammer, axe

5. An asynchronous binary up counter, made from a series of leading edge-triggered flip-flops, can be changed to a down counter by ________.
Options
A. taking the output on the other side of the flip-flops ( instead of Q)
B. clocking of each succeeding flip-flop from the other side ( instead of Q)
C. changing the flip-flops to trailing edge triggering
D. all of the above

7. Assume you want to determine the timing diagram for a 4-bit counter using an oscilloscope. The best choice for an oscilloscope trigger signal is ________.
Options
A. the most significant bit (MSB)
B. the least significant bit (LSB)
C. the clock signal
D. from a composite of the MSB and LSB

9. Assume a 4-bit ripple counter has a failure in the second flip-flop such that it "locks up." The third and fourth stages will ________.
Options
A. continue to count with correct outputs
B. continue to count but have incorrect outputs
C. stop counting
D. turn into molten silicon

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