The common emitter amplifier is a three basic single-stage bipolar junction transistor and is used as a voltage amplifier. The signal is applied to the amplifier input and output gain is achieved. Then, the transistor should be biased to get the desired Q-point. When a transistor is used as an amplifier, the first step is to choose an appropriate configuration, in which the device is to be used. The transistor (BJT, FET) is a major component in an amplifier system. One most important constraint during the amplification is that only the magnitude of the signal should increase and there should be no changes in the original signal shape. The process of increasing the strength of a weak signal is known as Amplification.
The Amplifier is an electronic circuit that is used to increase the strength of a weak input signal in terms of voltage, current, or power.
