Amplifier Design with BJTs and FETs
Ulrich L. Rohde, David P. Newkirk · 2000
This chapter gives the most detailed analysis and guidelines for discrete and integrated amplifiers, providing deep insight into semiconductor performance and circuitry necessary to get the best results from the devices. It includes a discussion of the properties of the amplifiers, gain stability, and matching, and an evaluation of one-, two-, and three-stage amplifiers with internal dc coupling and feedback, as are frequently found in integrated circuits. Examples of ICs currently on the market, are also provided. Another important topic in this chapter is the choice of bias point and matching for digital signal handling, and insight into such complex issues as the adjacent channel power ratio. A discussion of differential amplifiers, frequency doublers, AGC, biasing and push-pull/parallel amplifiers comes next, followed by an in-depth section on power amplifiers, including several practical examples and an investigation of amplifier stability analysis. A selection of power-amplifier datasheets and manufacturer-recommended applications completes the chapter.