Doherty amplifying apparatus using a harmonic control circuit

Details Doherty amplifying apparatus using a harmonic control circuit Doherty amplifying apparatus using a harmonic control circuit

2008-02-11

2010-02-16

Mottola, Steven J (Department: 2817)

Amplifiers

With plural amplifier channels

Redundant amplifier circuits

Reexamination Certificate

active

07663435

ABSTRACT:
A Doherty power amplifying apparatus includes a harmonic-controlled Doherty amplifier; and an input matching unit and an output matching unit for input matching and output matching the harmonic-controlled Doherty amplifier, respectively. The harmonic-controlled Doherty amplifier includes a carrier amplifier; a peaking amplifier arranged in parallel to the carrier amplifier; and a harmonic control circuit, arranged in front of the output matching unit, for controlling a harmonic component of an output of the Doherty amplifier to enable the Doherty amplifier to perform a switching or saturation operation.

REFERENCES:
patent: 5420541 (1995-05-01), Upton et al.
patent: 6861907 (2005-03-01), Gotou
patent: 7342444 (2008-03-01), Kim et al.
patent: 2004/0056723 (2004-03-01), Gotou
patent: 2005/0231286 (2005-10-01), Gotou et al.
patent: 2004/023646 (2004-03-01), None
patent: 2006/003608 (2006-01-01), None

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