| 摘要 |
PROBLEM TO BE SOLVED: To provide an amplifier which amplifies RF signals containing two or more frequency components with favorable distortion characteristics in an apparatus such as a mobile base station which performs multi-carrier transmission. SOLUTION: A circuit having a characteristic (negative phase rotation characteristic) in which an electric length becomes short when a frequency becomes high in a frequency range corresponding to a delta frequency or a band of an input frequency is connected to an input terminal or an output terminal of the amplifier through a 1/4 wavelength transmission line 2, and the impedance of a bias circuit is decreased over a wide bandwidth without causing the deterioration of the signal itself. COPYRIGHT: (C)2008,JPO&INPIT |
