ABSTRACT
This chapter describes the characteristic curves of transistors, the ways that a transistor amplifier can be made, and various classes of amplifiers and their differences. It explores the use of transistors in circuits and the use of a transistor for voltage or current amplification. The chapter details emitter follower, the input and output impedances, impedance matching, voltage and current gains, and coupling in amplifiers and the ways this is carried out. The characteristic curves of a transistor provide the relationship between collector-emitter voltage and collector current for different values of the base current. The common element of a transistor is shared between the input and the output. In a common-collector amplifier, the collector is common between the input and the output; thus, the input signal is introduced between the base and the collector, and the output signal is taken between the emitter and the collector.
