The overall reason for cascading amplifiers is the need for an increase in amplifier output to meet a specific requirement, e.g., to increase the signal strength in a Television or radio receiver. Using a cascade, or multistage, amplifier can provide your design with a higher current gain or voltage gain.

Why is cascading done?

Cascading of amplifier stages is usually done to increase the total gain of the amplifier. However, sometimes cascading is done to get the desired output and input impedance for specific applications. ... forms the voltage gain of the two stage cascade amplifier.

What happens when two amplifiers cascaded?

A cascaded amplifier simply means multiple amplifiers lumped together into a single device. The output of one amplifier stage is connected to the input amplifier stage. ... Placing the amplifier stages in series in this way allows more gain to be applied to an input signal.