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Digital Electronics - Flip-Flops

Exercise : Flip-Flops - Filling the Blanks
16.
When the output of the NOR gate S-R flip-flop is in the HOLD state (no change), the inputs are ________.
S = 1, R = 1
S = 1, R = 0
S = 0, R = 1
S = 0, R = 0
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
Regardless of whether you develop a description in AHDL or VHDL, the circuit's proper operation can be verified using a ________.
PROCESS
computer
simulator
primitive library
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
The 74121 nonretriggerable multivibrator can have the output pulse set by a single external component. This component is a(n) ________.
capacitor
inductor
resistor
LED
Answer: Option
Explanation:
No answer description is available. Let's discuss.
19.
The signal used to identify edge-triggered flip-flops is ________.
a bubble on the clock input
an inverted "L" on the output
the letter "E" on the enable input
a triangle on the clock input
Answer: Option
Explanation:
No answer description is available. Let's discuss.
20.
An edge-triggered flip-flop can change states only when ________.
the trigger is HIGH
the D input is HIGH
the trigger is LOW
the trigger input changes levels
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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