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Definition of "class B-E amplifier" |
transient switched mode amplifier where the device is biased at cutoff, the input signal is large enough to drive the amplifier into heavy saturation such that only a small percentage of time is spent in transition, and the design is such that during saturation the waveform is determined by the switch circuit transient response, while the waveform during cutoff is determined by the transient response to the entire circuit, including the load. The amplifier is literally switched between cutoff and saturation, the transient responses are well controlled, and thus the saturation angles approach the conduction angle, which is 180 degrees. The final tuned output current wave form of a class B-E amplifier resembles an ideal squarewave. It is important to note that only frequency related information (FM) is preserved in a class B-E amplifier, while all amplitude information (AM) is lost. |
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