FIELD: electricity.
SUBSTANCE: according to the versions of implementation of the present invention the combined amplifier has the possibility of being connected to output circuit (43, 53, 63, 73, 83) of adder and to load (49, 130). Output circuit (43, 53, 63, 73, 83) of adder contains at least one dynamically tuned reactive resistance (47, 48). Instantaneous efficiency of combined amplifier (3, 4, 120) is increased by adjusting the impedance/admittance, to which each of the above, at least two, power amplifiers (41, 42,71, 72) is loaded. Amplifiers excite in different ways and can be a part of Chireix outphasing system or a pair of Doherty amplifier.
EFFECT: increasing instantaneous efficiency of combined amplifier.
21 cl, 18 dwg
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