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← ScienceWhich outcome occurs when a poorly grounded signal cable connects a high-frequency amplifier IC to a capacitive load?
A)Amplifier oscillation instability occurs✓
B)Capacitive load discharges immediately
C)Signal amplitude increases linearly
D)Harmonic distortion decreases significantly
💡 Explanation
Amplifier oscillation occurs because unwanted inductive cable reactance forms a parasitic LC circuit via parasitic capacitance. Consequently, positive feedback excites the **Barkhausen criterion**, therefore oscillation; rather than predictable amplification if grounding routes were adequate.
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