Explain the purpose of an astable multivibrator - NSC Electrical Technology Electronics - Question 4 - 2018 - Paper 1
Question 4
Explain the purpose of an astable multivibrator.
An astable multivibrator generates a continuous train of high (1) and low (0) pulses. This allows for the productio... show full transcript
Worked Solution & Example Answer:Explain the purpose of an astable multivibrator - NSC Electrical Technology Electronics - Question 4 - 2018 - Paper 1
Step 1
Name ONE application of an astable multivibrator.
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Answer
One application of an astable multivibrator is in clock pulse generation for digital circuits, where it provides timing signals.
Step 2
Draw the output signal with reference to signal Vout on ANSWER SHEET 14.
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Answer
The output signal will be a square wave alternating between high and low states, resembling a continuous train of pulses.
Step 3
Describe the effect of increasing the value of R1 on a 555 monostable multivibrator.
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Answer
If the value of R1 is increased, the time constant of the charging circuit will also increase, resulting in a longer duration of the output high state.
Step 4
Explain how additional trigger pulses affect the output.
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Answer
When the first trigger pulse is applied, the output of the 555 will be pulled high. If additional trigger pulses are applied during this high state, they will have no effect on the output until the output returns to low.
