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← TechnologyWhich outcome occurs when a power amplifier's quiescent current drifts due to thermal runaway in a radio transmitter?
A)Increased signal intermodulation distortion✓
B)Improved power conversion efficiency
C)Enhanced signal spectral purity
D)Reduced amplifier harmonic distortion
💡 Explanation
Thermal runaway raises the transistor’s temperature, resulting in increased quiescent current, and thus gain fluctuations causing increased signal intermodulation distortion because the amplifier operates non-linearly. Therefore, distortion rises, rather than an improvement in conversion efficiency.
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