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Which mechanism limits gallium arsenide transistor switching frequencies?

A)Electron velocity saturation occurs
B)Increased junction capacitance dominates
C)Thermal runaway severely distorts
D)Electromigration causes channel destruction

💡 Explanation

Electron velocity saturation limits the current increase because increasing the electric field doesn't proportionally raise electron velocities, therefore higher frequencies are unreachable, rather than capacitance increases, thermal distortions, or channel destruction affecting operation initially.

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