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← ScienceWhich outcome occurs when parasitic capacitance couples a digital signal path to an analog amplifier's input?
A)Signal distortion and noise injection✓
B)Reduced amplifier bandwidth at high frequency
C)Increased amplifier gain and instability
D)Complete amplifier saturation and shutdown
💡 Explanation
When parasitic capacitance bridges a digital and analog signal path, capacitive coupling occurs because the changing digital signal injects current into the analog input, distorting the analog signal with noise. Therefore, undesirable signal distortion and noise occur, rather than decreased bandwidth, increased gain, or saturation which require different circuit behaviors.
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