Power amplifier

Details Power amplifier Power amplifier

1981-01-23

1984-02-07

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including particular power supply circuitry

330 10, H03F 304, H03F 338

Patent

active

044306253

ABSTRACT:
In a power amplifier arranged so that a load is driven by a first amplifying circuit having a low distortion factor, the power supply voltage of said first amplifying circuit is varied in accordance with an input signal by a second amplifying circuit having a good power efficiency, to supply always a voltage of a minimum level to said first amplifying circuit whereby to enhance the power efficiency of said first amplifying circuit, wherein arrangement is provided so that the first amplifying circuit is free from the effect of the second amplifying circuit represented by the distortion factor which increases especially in the high frequency range, so that the power amplifier is operated with low distortion factor and high power efficiency even for the high frequency range.

REFERENCES:
patent: 4115739 (1978-09-01), Sano et al.
patent: 4218660 (1980-08-01), Carver

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