HIGH EFFICIENCY AMPLIFIER Russian patent published in 2007 - IPC H03F1/02 H03F3/26 

FIELD: radio engineering, possible use in sound frequency amplifiers.

SUBSTANCE: in the amplifier, two linear channels are working for the load. First channel works directly for the load and has high speed of output signal growth and wide frequency band. Second, low frequency, channel, is controlled by first channel and has "floating" power from two key channels. Second channel consists of control circuit and output cascade. Therefore, when signals with steep front or "sinks" on load are received at input of signals amplifier, i.e. in zone where key channels are not fast enough to track the signal, current load is taken by first channel. And with low frequency signal current load is tracked by second channel, which has low tracking power from key channels. Non-suppressed interferences from impulse power of output cascade are additionally suppressed by first channel, improving quality of output signal. In working mode the current of the first channel is low and mainly output cascade current passes through the load, wherein dispersed heat power is sharply decreased due to tracking power, resulting in high efficiency.

EFFECT: increased efficiency with preserved high qualitative parameters of output signal.

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