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Which of the following dc coupled amplifiers will typically exhibit the smaller bandwidth? A high-gain common-emitter...

Which of the following dc coupled amplifiers will typically exhibit the smaller bandwidth?

A high-gain common-emitter amplifier

A high-gain common-base amplifier

A common-collector amplifier with low output resistance

A Cascode amplifier
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The bandwidth of the Common Emitter Amplifier is low, because of the large parasitic base-collector capacitance, due to the Miller effect. This capacitance increases the time constant of the circuit, resulting in poor reproduction of high frequency signals. The Miller effect is minimised in the other three configurations.

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