Question

Difference between cascade and cascode amplifier

Answer 1

An amplifier consisting of a common emitter input stage that drives a common base output stage. ... From a transistor perspective, a cascade is typically when the amplifier load(s) are connected in a left-to right horizontal chain configuration, whereas a cascode has the load(s) stacked vertically.

Answer 2

In a cascade amplifier, the transistors are connected in series. The output of the first transistor serves as the input of the second transistor. The output of the second transistor, in turn, becomes the input of the third transistor. This chain like connection is continued until there is sufficient signal amplification.

In a cascode amplifier, the transistors are connected in parallel one above the other. There is one common emitter transistor that is used to drive a common base transistor.