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← ScienceWhich mechanism limits switching speed as gate capacitance increases in a MOSFET transistor?
A)Miller effect increasing input impedance✓
B)Increased channel resistance delaying discharge
C)Gate charge requiring higher bias voltage
D)Drain-source voltage dependence saturation
💡 Explanation
When gate capacitance increases, the Miller effect magnifies effectively parasitic capacitance between gate and drain because feedback introduces larger charging/discharging delays, limiting switching speed. Therefore, the Miller effect causing impedance changes matters rather than resistance, bias or saturation which involve different intrinsic properties.
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