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← ScienceWhich outcome arises when a high-frequency AC signal bypasses a DC power supply through parasitic capacitance?
A)Voltage ripple injected into DC output✓
B)Increased thermal noise in regulator
C)Oscillation of switching frequency
D)Destructive resonance within bypass network
💡 Explanation
When a high-frequency AC signal encounters parasitic capacitance, capacitive coupling allows the AC signal to pass because capacitive reactance decreases as frequency increases, potentially injecting ripple into the DC output. Therefore ripple injection occurs, rather than other outcomes like increased noise, oscillation, or resonance which require different causes such as device instability or impedance mismatch.
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