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Which transistor amplifier is most commonly used?

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Which transistor amplifier is most commonly used?

(a) Common Base

(b) Common Emitter

(c) Common Collector

(d) None of these

This question was posed to me during an interview for a job.

This question is from Methods of Reducing Distortion topic in chapter Amplitude Modulation of Analog Communications

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Right choice is (b) Common Emitter

The explanation: Common Emitter is most widely used because it has high power gain and voltage gain. In this method of connection, small changes in base/emitter current cause large changes in collector/emitter current. Therefore, the circuit is that of a current amplifier. Moreover, it also provides maximum transconductance for a given load.

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