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State ONE effect of switch bounce in electronic circuits - NSC Electrical Technology Digital - Question 3 - 2024 - Paper 1
Question 3
State ONE effect of switch bounce in electronic circuits. In electronic circuits, the pulses created by switch bouncing will be interpreted as information which may... show full transcript
Worked Solution & Example Answer:State ONE effect of switch bounce in electronic circuits - NSC Electrical Technology Digital - Question 3 - 2024 - Paper 1
Step 1
3.2.1 Explain feedback as it refers to the circuit.
Answer
Feedback occurs when a fraction of the output voltage is fed from the output back to the non-inverting input of the operational amplifier. This helps control the behavior of the circuit by stabilizing the output and ensuring that the desired performance is maintained.
Step 2
3.2.2 Explain why the capacitor reads in a positive trigger pulse as input to the circuit.
Answer
When a positive trigger pulse is applied to the input, both plates of the capacitor immediately charge up to the applied voltage. This allows the op-amp to compare the voltage at its terminals, affecting the switching behavior of the circuit.
Step 3
3.2.3 Describe the operation of the circuit when a negative trigger pulse is applied.
Answer
When a negative trigger pulse is input to the circuit, the op-amp compares the two voltages at its input terminals. If the voltage at the non-inverting input becomes more negative than the voltage at the inverting input, the output responds by switching high (+V_sat) and will remain in that state until the conditions change.
Step 4
3.2.4 Explain why the output does not change when trigger pulse 2 is applied.
Answer
Trigger pulse 2 is positive, and the voltage on the non-inverting input is negative. The circuit will only change its output state when the conditions meet the necessary criteria for switching, which in this case are not satisfied.