CBSE Class 12 Physics Notes: Semiconductor Electronics – Transistor as Amplifier

(i) Amplification: The phenomenon, in which the amplitude of input signal (Voltage, current or power) is increased, is defined as amplification.

(ii)Amplifier: The device (electronic circuits), used to increase the amplitude of input signal is known as amplifier.

(A)Common base amplifier:

(i)  NPN Transistor: 

(a) Circuit diagram

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