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Counters
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Question
Modulus refers to ________.
Options
A. a method used to fabricate decade counter units
B. the modulus of elasticity, or the ability of a circuit to be stretched from one mode to another
C. an input on a counter that is used to set the counter state, such as UP/DOWN
D. the maximum number of states in a counter sequence
Correct Answer
the maximum number of states in a counter sequence
Counters problems
Search Results
1. The circuit shown below is a ________.
Options
A. Johnson counter
B. ring counter
C. decade counter
D. BCD counter
Show Answer
Scratch Pad
Discuss
Correct Answer: Johnson counter
2. In VHDL, if we need to remember a value it must be stored in a ________.
Options
A. function
B. type declaration
C. variable
D. process
Show Answer
Scratch Pad
Discuss
Correct Answer: function
3. The counter circuit and associated waveforms shown below are for a(n) ________ counter, and the correct output waveform for
Q
B
is shown by waveform ________.
Options
A. synchronous, a
B. asynchronous, b
C. synchronous, c
D. asynchronous, d
Show Answer
Scratch Pad
Discuss
Correct Answer: synchronous, c
4. A D flip-flop can be made to toggle by ________.
Options
A. connecting to
Q
to D
B. connecting to Q to D
C. connecting D low
D. connecting D high
Show Answer
Scratch Pad
Discuss
Correct Answer: connecting to
Q
to D
5. Referring to the function table given below, taking the
CLEAR
,
S
1, and
S
0 inputs all HIGH ________.
Options
A. will inhibit the operation of the register
B. will reset the parallel registers and inhibit the serial data inputs
C. will cause the parallel data inputs to be loaded and passed to the parallel data outputs
D. will depend on what values are loaded into the parallel data inputs
Show Answer
Scratch Pad
Discuss
Correct Answer: will cause the parallel data inputs to be loaded and passed to the parallel data outputs
6. The decimal equivalent of the largest number that can be stored in a 4-bit binary counter is ________.
Options
A. 8
B. 15
C. 16
D. 32
Show Answer
Scratch Pad
Discuss
Correct Answer: 15
7. A J-K flip-flop is reset and must stay reset after the clock pulse. This transition requires that ________.
Options
A. J and K inputs must both = 0
B. J must be 0, K doesn't matter
C. J doesn't matter, K must = 0
D. J must be 0 and K must be 1
Show Answer
Scratch Pad
Discuss
Correct Answer: J must be 0, K doesn't matter
8. A BCD counter has ________ states.
Options
A. 8
B. 9
C. 10
D. 11
Show Answer
Scratch Pad
Discuss
Correct Answer: 10
9. The duty cycle of the most significant bit from a 4-bit (0?9) BCD counter is ________.
Options
A. 10%
B. 20%
C. 50%
D. 80%
Show Answer
Scratch Pad
Discuss
Correct Answer: 20%
10. The circuit shown below is used for ________, and for the inputs shown, the DATA output will be ________.
Options
A. multiplexing, 1
B. parallel-to-serial conversion, 0
C. demultiplexing, 0
D. parallel-to-serial conversion, HIGH
Show Answer
Scratch Pad
Discuss
Correct Answer: parallel-to-serial conversion, 0
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