Page 161 - Complete Wireless Design
P. 161
Amplifier Design
160 Chapter Three
Figure 3.58 A Class AB amplifier’s output waveform.
Figure 3.59 A Class B amplifier’s output waveform.
Figure 3.60 A Class C amplifier’s output waveform.
amplifier will also have a peak-to-peak voltage that is double the V of the
CC
power supply.
Class C amplifiers are found in FM driver stages, single-ended nonlinear RF
power output stages, mixers, and active frequency multipliers.
Amplifier biasing circuits. A transistor amplifier must be biased with resistors
and a power supply for a couple of reasons. Foremost, we would need two sep-
arate voltage supplies to furnish the desired class of bias for both the emitter-
collector and the emitter-base voltages. This is still done in certain
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