H - Electricity – 03 – F
Patent
H - Electricity
03
F
H03F 1/00 (2006.01) H03F 1/32 (2006.01) H03F 3/60 (2006.01)
Patent
CA 2087361
For supply to first and second feedforward distortion compensating circuits 33(1), 33(2) connected in parallel, a two-divider 31 divides into signals of a common phase and a common amplitude an input radio frequency signal supplied to an input terminal 11. A two-combiner 35 combines component outputs of the feedforward circuits in inphase as an amplified output signal which is supplied to an output terminal 13. In general, N feedforward circuits (N being an integer not less than two) are connected in parallel and are supplied with the input radio frequency signal through an N-divider. Component outputs of the feedforward circuits are combined in inphase as the output signal by an N-combiner. Alternatively, the input radio frequency signal is divided into signals of a predetermined phase difference and of a common amplitude by the N-divider. In this case, the component outputs of the feedforward circuits are combined in a phase of cancelling the predetermined phase difference by the N-combiner.
Ito Akira
Nojima Toshio
Sakamoto Hironori
Dennison Associates
Japan Radio Co. Ltd.
Nippon Telegraph & Telephone Corporation
Ntt Mobile Communication Network Inc.
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