Amplifiers – With plural amplifier channels – Redundant amplifier circuits
Reexamination Certificate
2006-12-05
2006-12-05
Mottola, Steven J. (Department: 2817)
Amplifiers
With plural amplifier channels
Redundant amplifier circuits
Reexamination Certificate
active
07145387
ABSTRACT:
A composite power amplifier includes a first and a second power amplifier connected to an input signal over an input network and to a load over an output network. The output network includes phase shifting elements for generating different phase shifts from each power amplifier output to the common load. The input network includes means for driving both power amplifiers to produce first output current components having an amplitude that increases linearly with increasing output signal amplitude below a transition point (T.P) and decreases motonically with increasing output signal amplitude above said point, and second output current components having an amplitude that increases linearly with increasing output signal amplitude both below and above the transition point.
REFERENCES:
patent: 5568086 (1996-10-01), Schuss et al.
patent: 5901346 (1999-05-01), Stengel et al.
patent: 6054896 (2000-04-01), Wright et al.
patent: 6201452 (2001-03-01), Dent et al.
patent: 6298244 (2001-10-01), Boesch et al.
patent: 6825719 (2004-11-01), Barak et al.
patent: 6897721 (2005-05-01), Hellberg
patent: 6940349 (2005-09-01), Hellberg
patent: WO 01/91282 (2001-11-01), None
patent: WO 02/05421 (2002-01-01), None
patent: WO 02/39577 (2002-05-01), None
H. Chireix; “High Power Outphasing Modulation;” Proceeding of the Institute of Radio Engineers; vol. 23, No. 11, Nov. 1935; pp. 1370-1392.
W. H. Doherty; “A New High Efficiency Power Amplifier for Modulated Waves;” Proceedings of the Institute of Radio Engineers; vol. 24, No. 9; Sep. 1936; pp. 1163-1182.
Frederick H. Raab; “Efficiency of Outphasing RF Power-Amplifier Systems;” IEEE Transactions on Communications, vol. COM-33, No. 10, Oct. 1985; pp. 1094-1099.
Bob. Stengel and William R. Eisenstadt; “LINC Power Amplifier Combiner Method Efficiency Optimization;” IEEE Transactions on Vehicular Technology, vol. 49, No. 1, Jan. 2000; pp. 229-234.
Xuejun Zhang and Lawrence E. Larson; “Gain and Phase Error-Free LINC Transmitter;” IEEE Transactions on Vehicular Technology, vol. 49, No. 5; Sep. 2000; pp. 1986-1994.
“Ampliphase AM Transmission System,” ABU Technical Review, No. 33; Jul. 1974; pp. 10-18.
Irfan Ullah; “Output Circuit of an Ampliphase Broadcast Transmitter;” ABU Technical Review, No. 63; Jul. 1979; pp. 17-24.
Frederick H. Raab; “Efficiency of Doherty RF Power-Amplifier Systems;” IEEE Transactions on Broadcasting; vol. BC-33, No. 3; Sep. 1987; pp. 77-83.
David M. Upton and Peter R. Maloney; “A New Circuit Topology to Realize High Efficiency, High Linearity, and High Power Microwave Amplifiers;” IEEE Proc. Rawcon 1998; pp. 317-320.
International Search Report Feb. 20, 2003 in corresponding PCT Application PCT/SE2002/02320.
Mottola Steven J.
Nixon & Vanderhye P.C.
Telefonaktiebolaget LM Ericsson (publ)
LandOfFree
Composite 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 Composite power amplifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Composite power amplifier will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3712683