Amplifiers – With amplifier bypass means
Reexamination Certificate
2007-01-16
2007-01-16
Pascal, Robert (Department: 2817)
Amplifiers
With amplifier bypass means
C330S310000
Reexamination Certificate
active
10905661
ABSTRACT:
Provided is a series type Doherty amplifier which includes a first power amplifier and a second power amplifier using a plurality of transformers. The first power amplifier and the second power amplifier are connected in series. The second power amplifier and a first transformer are connected in series. A first path is branched from a junction between the first power amplifier and the second power amplifier and a phase delay device and a second transformer are connected in series. An output port of the second transformer is connected to a junction of a second path of an output port of the second power amplifier. An efficiency of each power amplifier is determined by a ratio of 1:M in size of a final stage of each of the first and second power amplifiers.
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Jung Joo-Min
Kim Jung-hyun
Flanagan K.
Pascal Robert
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