The ________ is defined as the time the output is active divided by the total pe

CuriousTab

CuriousTab

Home Aptitude

Discussion

Home ‣ Digital Electronics ‣ Multivibrators and 555 Timer Comments

Question
The ________ is defined as the time the output is active divided by the total period of the output signal.
Options
A. on time
B. off time
C. duty cycle
D. active ratio

Correct Answer

duty cycle

Multivibrators and 555 Timer problems

Search Results

1. If the resistor in the Schmitt trigger astable multivibrator is a variable resistor, what part of the output voltage waveform will change when the resistance is changed?
Options
A. the shape of the waveform
B. the amplitude of the waveform
C. the period of the waveform
D. none of the above

4. What is the difference between an astable multivibrator and a monostable multivibrator?
Options
A. The astable is free running.
B. The astable needs to be clocked.
C. The monostable is free running.
D. none of the above

6. What is the function of the comparators in the 555 timer circuit?
Options
A. to compare the output voltages to the internal voltage divider
B. to compare the input voltages to the internal voltage divider
C. to compare the output voltages to the external voltage divider
D. to compare the input voltages to the external voltage divider

9. Triggering a retriggerable one shot during pulse generation will:
Options
A. time out the original pulse
B. extend the pulse to this trigger width
C. have no effect
D. double the original pulse width

10. The monostable multivibrator circuit is not an oscillator because ________.
Options
A. its output switches between two states
B. it requires a trigger to obtain an output signal
C. it requires a sine wave input signal
D. the circuit does not require a dc power supply

Comments

More in Digital Electronics: