Discussion
How does a cascode arrangement defeat the Miller effect?
Answer: D
With a common-base stage above it holding the collector nearly fixed, the lower device's voltage gain is about unity, so its collector-base capacitance is barely multiplied at all. The overall voltage gain is still taken, but at the upper device where the capacitance does not bridge input and output. Capacitances are not placed in series and the input is not where gain appears. Separating where the gain is taken from where the capacitance is seen is the whole trick.
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