The 8421-BCD number for decimal 473 is ( ).
A. 010011010011
B. 101011011001
C. 010001110011
D. 010011110011
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The time interval on the leading edge of a pulse between 50% and 50% of the amplitude is the ( ).
A. rise time
B. fall time
C. pulse width
D. period
A quantity having continuous value is ( ).
A. a digital quantity
B. an analog quantity
C. a binary quantity
D. a natural quantity
A nonretriggerable one-shot with an active HIGH output has a pulse width of 20ms and is triggered from a 60 Hz line. The output will be a ()
A. series of 16.7 ms pulses
B. series of 20 ms pulses
C. constant LOW
D. constant HIGH
The modulus of a counter is ()
A. the number of flip-flops
B. the actual number of states in its sequence
C. the number of times it recycles in a second
D. the maximum possible number of states
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