ABSTRACT
This chapter provides a brief introduction to the basic complementary metal-oxide semiconductor (CMOS) amplifier, in particular, the two-stage CMOS amplifier. Important parameters describing the behavior of the CMOS amplifier are: input voltage range, frequency response, noise, current consumption, and numerous others. To eliminate amplification loss on the dividers in the output stages, it is essential that the optimal combination of output and load impedances should be formed. The gain decrease at lower frequencies depends on the properties of the external circuit elements, and at higher frequencies, it depends on the parameters of the circuit itself. The Miller effect results in amplifier bandwidth reducing. To control this effect, i.e., to widen the bandwidth, it is necessary to “isolate” the amplifier output from its input.
