| US 7,589,588 B2 | ||
| High-frequency power amplifier and radio communication equipment using the same | ||
| Masami Ohnishi, Hachioji (Japan); Tomonori Tanoue, Machida (Japan); and Hidetoshi Matsumoto, Kokubunji (Japan) | ||
| Assigned to Renesas Technology Corp., Tokyo (Japan) | ||
| Filed on May 25, 2006, as Appl. No. 11/439,990. | ||
| Claims priority of application No. 2005-153735 (JP), filed on May 26, 2005. | ||
| Prior Publication US 2006/0267684 A1, Nov. 30, 2006 | ||
| Int. Cl. H03F 1/14 (2006.01) | ||
| U.S. Cl. 330—51 | 20 Claims |
| 1. A high-frequency power amplifier comprising:
a plurality of power amplifiers arranged in parallel;
an inductance element inserted in series in an input signal line of said each power amplifier;
an input matching circuit for performing matching of inputs of a parallel connection which connect each series connection
of said power amplifier and said inductance element in parallel;
an output matching circuit for performing matching of outputs of the parallel connection; and
a control unit for controlling said power amplifiers in such a manner that one of said power amplifiers is always brought
to an operation condition and the remainder of said power amplifiers are brought to an operation or non-operation conditions,
wherein said input matching circuit is coupled to each of said power amplifiers through a switchless coupling.
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