Amplifiers – With plural amplifier channels – Redundant amplifier circuits
Reexamination Certificate
2011-07-05
2011-07-05
Nguyen, Hieu P (Department: 2817)
Amplifiers
With plural amplifier channels
Redundant amplifier circuits
C330S295000
Reexamination Certificate
active
07973600
ABSTRACT:
The present invention relates to a power amplifier; and, more particularly, to a Doherty power amplifier. The power amplifier includes at least one carrier amplifier; at least one peaking amplifier arranged in parallel with the carrier amplifier in such a manner that the carrier amplifier and the peaking amplifier collectively operate as a Doherty amplifier; a plurality of input matching circuits, at least one of which is respectively connected to an input ends of the carrier amplifier and the peaking amplifier; at least one impedance control circuit, each of which is connected to an output end of each carrier amplifier for controlling a load line impedance of the said each carrier amplifier; at least one output matching circuit directly or indirectly connected to output ends of the impedance control circuit and the peaking amplifier; and at least one first delay circuit for matching delays between the carrier amplifier and the peaking amplifier. The present invention provides an improved Doherty power amplifier capable of achieving a further miniaturization and integration while maintaining an advantage in terms of efficiency and linearity of a Doherty power amplifier by employing an improved output and input matching method, and capable of operating more similar to the ideal operation of a Doherty power amplifier by applying an improved input power division method thereto.
REFERENCES:
patent: 6424223 (2002-07-01), Wang et al.
patent: 7193472 (2007-03-01), Gotou et al.
patent: 7295074 (2007-11-01), Wong et al.
patent: 7336127 (2008-02-01), Kennan
patent: 7342444 (2008-03-01), Kim et al.
Nguyen Hieu P
Thomas, Kayden Horstemeyer & Risley, LLP.
WiPAM, Inc.
LandOfFree
Doherty power amplifier does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Doherty power amplifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Doherty power amplifier will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2625219