It is just like one stage
Then you multiply the gains together to get the overall gain.
A cascaded common emitter transistor amplifier is a type of electronic circuit that uses multiple common emitter transistor stages to amplify a signal. This type of amplifier is commonly used in audio and radio frequency applications.
A cascaded common emitter transistor amplifier works by using the amplification properties of transistors. The input signal is first amplified by one transistor, and then that amplified signal is further amplified by subsequent transistors in the circuit. This results in a larger output signal compared to the input signal.
There are several benefits to using a cascaded common emitter transistor amplifier. These include high gain, low noise, and low distortion. Additionally, this type of amplifier allows for greater control over the amplification process and can be easily configured for different input and output impedance levels.
A cascaded common emitter transistor amplifier is typically modelled using a hybrid-pi model. This model represents the transistor as an equivalent circuit with resistors, capacitors, and a current source. The values of these components can be determined using the transistor's characteristics and the circuit parameters.
One potential drawback of a cascaded common emitter transistor amplifier is the need for careful biasing and matching of components. If these parameters are not properly set, it can lead to distortion and instability in the amplifier. Additionally, this type of amplifier may have a limited bandwidth, making it unsuitable for high-frequency applications.