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Digital Electronics - Flip-Flops

Exercise : Flip-Flops - Filling the Blanks
26.
An astable multivibrator is a circuit that ________.
has two stable states
is free-running
produces a continuous output signal
is free-running and produces a continuous output signal
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
The inputs on a 7474 D flip-flop are S, R, D, and CLK ________ is/are synchronous.
Only S
S and R
Only D
All of the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
A flip-flop operation is described as a toggle when the result after a clock is ________.
change to opposite states
Answer: Option
Explanation:
No answer description is available. Let's discuss.
29.
The asynchronous inputs on a J-K flip-flop ________.
are normally not at the active level at the same time
take precedence over the J and K inputs
do not require a clock pulse to affect the output
all of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.
A positive edge-triggered flip-flop will accept inputs only when the clock ________.
is LOW
changes from HIGH to LOW
is HIGH
changes from LOW to HIGH
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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