Classic RF Power Amplifiers
This chapter discusses several types of RF power amplifiers (PAs), most often called Class A, AB, B, and C. Class C amplifiers, in turn, are usually divided into three categories: a) current-source (or underdriven) Class C PAs, b) saturated (or overdriven) Class C PAs, and c) mixed-mode Class C PAs. With the exception of mixed-mode Class C PAs, which behave somewhat differently, the other circuits have the following common features: they have the same basic collector circuit schematic; the circuits are all driven with sinusoidal (or approximately sinusoidal) waveforms; and the active device behaves, at least for a certain portion of the RF cycle, as a controlled-current source.
Classic RF Power Amplifiers, Page 1 of 2
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