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What is Common base circuit?

Latest Updated:02/01/2006

Question:

What is Common base circuit?

Answer:

In a common base circuit, when the base is connected to a common ground, the emitter acts as input, and the collector is connected to load resistor, the output can be got from the collector.
This kind of circuit is used as a high-frequency power amplifier because there was little effect from feedback capacitance and its low input resistance. These days, however, common emitter circuits are more commonly used for high-frequency applications, and common base circuits are no longer often seen.

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Common emitter circuit
Common collector circuit/Emitter follower circuit

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