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Digital Electronics - Multivibrators and 555 Timer

Exercise : Multivibrators and 555 Timer - General Questions
11.
What is the difference between an astable multivibrator and a monostable multivibrator?
The astable is free running.
The astable needs to be clocked.
The monostable is free running.
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
Is there any limit to the number of times that a 74123 can be retriggered?
yes
no
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.

Determine tHI and tLO for the circuit given below.

tHI = 7.95 s, tLO = 6.24 s
tHI = 6.24 s, tLO = 7.95 s
tHI = 3.97 s, tLO = 3.21 s
tHI = 3.21 s, tLO = 3.97 s
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
The output of the astable circuit ________.
constantly switches between two states
is LOW until a trigger is received
is HIGH until a trigger is received
floats until triggered
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.

If a diode is connected across resistor RB (positive end up) in the given figure, what is the new duty cycle of the output waveform?

56%
44%
21.6%
17.4%
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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