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Chapter: Electronic Circuits - BJT Amplifiers

Common Base Amplifier Circuit

From given circuit, the signal source is coupled to the emitter of the transistor through C1.

Common Base Amplifier Circuit:

 


 

From above circuit, the signal source is coupled to the emitter of the transistor through C1. The load resistance RL is coupled to the collector of the transistor through C2. The positive going pulse of input source increases the emitter voltage. As base voltage is constant, forward bias of emitter-base junction reduces. This reduces Ib, Ic and drop across Rc.

Vo = VCC - ICRC

Reduction in IC results in an increase in Vo. Positive going input produces positive going output and vice versa. So there is no phase shift between input and output in common base amplifier.

 

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Electronic Circuits - BJT Amplifiers : Common Base Amplifier Circuit |


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