3.1 Cascaded Amplifier

A cascaded amplifier is a configuration of the operational amplifier composed of two or more smaller configurations in series. An example of a cascaded amplifier could be two non-inverting amplifiers where the output of the first stage is the input of the next. In this scenario, the gain of the circuit is equal to the product of the gain in each stage. For example, in a two-stage cascaded amplifier with each stage having a gain of 9 and 5 respectively, the total gain is equal to 45. Figure 3-1 shows an example of this type of configuration.