A cascade of two transconductor stages(with perhaps an output buffer in some cases) is the most common opamp topology. Miller compensation is the most widely used method of frequency compensation for opamps. Although the transconductor topologies are different in an opamp, the principles of obtaining high gain and frequency compensation are exactly the same as what is done here. For instance see the schematics in the datasheets of
LM324 of
LF347 opamps which you'll be using later in this lab. You'll be using these steps in simulations/measurements of opamps and other feedback loops(such as the voltage regulator in the next experiment).