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Multivibrators and 555 Timer
What controls the output pulse width of a one shot?
the clock frequency
the width of the clock pulse
an RL time constant
an RC time constant
Correct Answer:
an RC time constant
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Multivibrators and 555 Timer
The internal circuitry of the 555 timer consists of ________, an R-S flip-flop, a transistor switch, an output buffer amplifier, and a voltage divider.
What is the duty cycle of the waveform at the output of the circuit given below?
Design a circuit using a 74121 to convert a 33-kHz, 30% duty cycle waveform to a 33-kHz, 60% duty cycle waveform.
What is the pulse width of the output of a 74123 if an external 4.7-kΩ resistor and a 0.022-µF capacitor are used?
A monostable 555 timer has the following number of stable states:
Pulse stretching, time-delay, and pulse generation are all easily accomplished with which type of multivibrator circuit?
What is the difference between a retriggerable one shot and a nonretriggerable one shot?
Which of the following is NOT a characteristic of a retriggerable monostable multivibrator?
With most monostable multivibrators, what is the Q output when no input trigger has occurred?
The output of the astable circuit ________.
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