High efficiency power amplifier

Details High efficiency power amplifier High efficiency power amplifier

1997-05-08

1999-03-09

Mullins, James B.

Amplifiers

Signal feedback

Plural amplifier channels

330124R, 330149, 330295, 330151, H03F 134

Patent

active

058806334

ABSTRACT:
A high efficiency power amplifier 600 consists of a non-linear radio frequency (RF) Doherty power amplifier (67) and a linearization circuit, such as, for example, a Cartesian Feedback circuit (33), an RF feedback circuit (38), an IF feedback circuit (48), or a feedforward circuit (55). The Doherty amplification stage (67) may be implemented with a BJTs, FETs, HBTs, H-FETs, PHEMTs, or any other type power transistor technology or device.

REFERENCES:
patent: 4546326 (1985-10-01), Van Uffelen et al.
patent: 5101173 (1992-03-01), DiPiazza et al.
patent: 5142240 (1992-08-01), Isota et al.
patent: 5420536 (1995-05-01), Faulkner et al.
patent: 5420541 (1995-05-01), Upton et al.
patent: 5444418 (1995-08-01), Mitzlaff

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